Large Tonnage Research Articles

Socio-economic assessment of riverbank erosion from heavy boat traffic: A case study at the Cho Gao Canal, Tien Giang, Vietnam

Cho Gao canal is the only inland waterway channel for river transport with large tonnage transporting rice, agricultural products, and goods from the Mekong Delta to Ho Chi Minh City. However, big waves from heavy boat traffic have been gradually wearing away the riverbanks, creating severe erosion and affecting local communities livelihood and safety. This study assessed the vulnerability of riverbank erosion in the Cho Gao canal using a quantified erosion index and the contingent valuation method. The data was collected from 120 households living along the canal. The calculation revealed that 76.67% of the households had moderate erosion vulnerability, which will become higher in the future unless government interventions are made. Besides, this paper also examined people willingness to accept (WTA) to compensate for the losses from riverbank erosion. On average, each household along the canal accepted 503.4 million VND (around 21,872.78 USD) of compensation to pay for their suffered losses. Factors influencing people’s WTA were erosion affected levels, income, and age. People living along the Cho Gao canal have been experiencing damages from riverbank erosion since 2009, so there is a demand for state interventions to alleviate the problem and re-stabilize local communities’ livelihood.

Study on Microstructure and Properties of Welded Joints with Low Strength Backing Layer for WELDOX960

The welding of WELDOX960 ultra-high strength steel must consider not only the strength but also the toughness of the welding zone. In this paper, a new welding process with low strength matching backing layer is studied, that is, we choose ER50-6 wire for backing welding, use T union gm120 wire for MAG welding filling, and complete the cover welding. We prepared two groups of welding samples of ER50-6 wire backing welding and T union gm120 wire backing welding. Then we test the samples by optical metallography, tensile test, impact test and hardness test. The results show that the properties of the two kinds of backing weld can meet the requirements. The basic structure of the weld outside the backing layer of the two welding methods is similar, which are acicular ferrite and carbide. Using ER50-6 welding wire as backing, the microstructure of the weld is uniform and fine ferrite grain and a small amount of pearlite. Using T union GM120 high strength steel as backing, the microstructure of the weld is acicular ferrite and carbide. The toughness of ER50-6 is higher than that of T union GM120, and the hardness is lower than that of T union GM120.The research results have been successfully applied to the welding of large tonnage truck crane boom, and the enterprise has achieved high economic benefits.

Stability of Large-scale Slope Excavated in Weak Rocks with faults: a case study

The slope stability of HUANGJINXIA water control project is very prominent during the construction period. Focusing on the main features of the right bank slope of the dam during the construction period, the geological, physical, and monitoring data were integrated to analyse the influence of the fault fy17, which runs horizontally across the entire shoulder slope and tilts out of the slope at a slow dip angle. Analysis of the effect of fault fy17 on the flow field and deformation stability of the slope, the potential deformation damage mechanisms of slopes to propose targeted reinforcement solutions. On this basis, the numerical analysis method were used to review the slope stability respectively. The results show that after adopting large tonnage anchor cable support and deep drainage measures, the slope deformation has basically converged and no new signs of deformation have been found on the slope surface; the calculation results also show that the incremental deformation of subsequent excavation of the slope is not significant and the safety factor values during the construction and operation periods meet the requirements of the design specifications; the targeted reinforcement measures have effectively ensured the stability of the slope.

Remaining useful Life Improvement for the Mining Railcars under the Operational Conditions

ABSTRACT The large tonnage mines use railway transportation as a system for mineral transportation. The rolling stock health condition study and improvement not only reduce the lifecycle cost of the assets but also ensures safe, reliable, punctual, and efficient transportation. The remaining useful life estimation is an efficient approach to condition-based maintenance, prognostics, and health management. This paper aims to predict the remaining life of a mining rolling stocks in the presence of operational environmental effects. In this study, the operation and failure data were obtained from Malmbana, LKAB, Sweden, a Swedish Railway Company, considering the effective operational factors. The failure behaviour of the railcar was evaluated and then the proportional hazard model was used to estimate the conditional reliability functions and accordingly the remaining useful life at the various initial survival time. Finally, the reliability-based time interval is applied to plan the maintenance operations. Results of this study show that the operator’s skill level and the maintenance quality had a significant influence on the reliability performance. By considering the proposed PM plan according to the desired reliability level, the remaining lifetime of the rolling stock will be improved by 78.10%, on average.

Potentiality of Uranium Mineralisation in the Environs of Chhattisgarh Basin, India: a new occurrence in Chhibra

The Meso-Proterozoic intracratonic basins are known for hosting medium to high grade, large tonnage, low cost unconformity-type uranium deposits in the world like-Athabasca Basin, Saskatchewan, Canada and the Pine Creek Geosyncline, Northern Territory, Australia. Similarly, there are fourteen Proterozoic basins in India, out of which, the unconformity-related uranium deposits are identified at Lambapur-Yellapur-Chitrial in the northern part of the Cuddapah basin. Based on the geological setting, age and fertile basement provenance, the other Proterozoic basins in India also hold promise for uranium mineralisation. In this context, the Chhattisgarh basin which is third largest Proterozoic basin in Central India occupying an area of 33,000 sq. km. with 2500m thick sediments, is identified as one of the major favourable targets for uranium mineralisation. It is located at the northern fringe of Bastar Craton in parts of Odisha and Chhattisgarh and comprises mostly siliciclastic sediments of Singhora, Chandrapur and Raipur Groups. 
 Uranium exploration carried out in the environs of Chhattisgarh basin mostly along the basin margins, have brought to light a number of uranium occurrences having sizeable dimensions hosted by both the basement rocks viz. Malaikhaman (0.026-0.11% U3O8), Makarumunda (0.013-3.3% U3O8), Damdama (0.026-0.43% U3O8) , Kashipali (0.010-0.96% U3O8), Karichhapar (0.011-0.40% U3O8) and the cover sediments viz. Juba-Banjhapali (0.010-0.078% U3O8), Govardhangiri-Bagia Nala (<0.010-0.80% U3O8), Chitakhol-Renkhol-Bokarda (<0.012-0.39% U3O8). The newly located uranium mineralisation in the sandstones of Rehatikhol Formation near Chhibra which is exposed intermittently over a strike length of 800m with grab samples (n=43) physically assayed 0.014 to 0.140% eU3O8, 0.010 to 0.120% U3O8 (β/γ) and <0.005% ThO2. Uraninite and pitchblende have been identified as uranium minerals. The favourable factors like geological, geochemical, geophysical, sedimentological, tectonic framework and presence of fertile granitic rocks (n=33, 5-26ppm U) in the provenance indicate its potentiality for uranium mineralisation. The exploration so far, has been mostly confined around shallow basin margins leaving deeper part unexplored. With the advancement of geophysical techniques like airborne magnetic, radiometric and electromagnetic surveys it would be possible to explore the deeper part of the basin. In addition, geochemical techniques such as hydro and litho-geochemical sampling could also be applied around suitable litho-structural settings, especially along the shear/fault zones trending NNE-SSW to NW-SE and their intersections with the ENE-WSW trending shear/fault zones. 
 The present paper deals with the potentiality of uranium mineralisation in the environs of Chhattisgarh basin with emphasis on recently located significant occurrence of uranium mineralisation near Chhibra in the Rehatikhol Formation of Singhora Group along the southeastern margin of Chhattisgarh basin.

STRUCTURAL AND CHEMICAL CHARACTERISTIC OF PECTIN FROM PICEA ABIES GREENERY

The present work aimed to determine structural features of polysaccharides derived from the P. abies foliage by extraction with a (NH4)2C2O4 solution. The isolated polysaccharide was studied in detail by the methods of ion exchange chromatography, partial acidic hydrolys and NMR spectroscopy. It was shown that this polysaccharide contained polymers of various structures. The major constituents of PAO were low-methoxyl and low-acetylated 1,4-a-D-galacturonan and by minor parts of partly 2-O- and/or 3-O- acetylated rhamnogalacturonan-I (RG-I). The side carbohydrate chains of the branched region of RG-I were represented predominantly by highly branched 1,5-a-L-arabinan and minor portions of 1,4-β-D-galactan. In addition to the dominant pectins, polysaccharide PAO contained binding glycans of the glucomannans class, which indicated a close interaction of these polysaccharides in the cell walls. Thus, the structural features of pectin woody P. abies, extracted with a solution of (NH4)2C2O4, were first determined. It can be concluded that P. abies woody greens, a large tonnage waste from the wood processing industry, can be considered as a potential source of pectin substances. The results of studying the structure of components of woody green P. abies can be the basis for the development and improvement of new technologies for the integrated use of this raw material.

GEOSTATISTICAL APPROACH FOR THE ESTIMATION OF SHEAR-HOSTED GOLD DEPOSIT: A CASE STUDY OF THE OBUASI GOLD DEPOSIT, GHANA

Underground mining at Obuasi in Ghana has been in operation since 1947. This paper uses geostatistical methods to evaluate gold ore blocks to ensure reliable grades for mining large tonnage and low-grade resources. Historically, the principal ores were low tonnage, high grade and relatively homogeneous quartz stockwork with simple geometry and average bulk grades in the range of 20-30 g/t that were evaluated using conventional polygonal methods and mined by semi-mechanized means. Currently, the ore is a shear-hosted mixed quartz vein and disseminated sulphide type deposit of low grade that is mined using highly mechanized means. The need therefore arises for a re-assessment of the estimation procedures to ensure prolonged and more profitable mining. Both diamond drill (DD) core and stope/cross-cut channel samples were taken from Block 1 at the mine for analyses and re-assessment. A wireframe model was used to constrain the three dimensional (3D) block model of the deposit. Ordinary kriging (OK) and multiple indicator kriging (MIK) geostatistical methods were used to estimate gold grades. Grade distribution is positively skewed with high spatial variability and extreme values while background values are established as <0.6 g/t. The Spatial variability is characterized by fitting models on experimental variograms. The MIK approach mitigates the effects of outliers and establish grades that are consistently lower than the OK and the weighted average method that are widely used at the mine. The MIK method, a non-linear, non-parametric method of local grade estimation are applicable to the deposit architecture. Profoundly, the MIK method is a more reliable approach considering the fact that the MCF based on the estimates at the mine are high despite operational deficiencies on the mine. The results from this study demonstrates usefulness of geostatistics to determine the architecture of Au mineralization at the deposit scale.

Study of the separation of mineral phases of Waelz clinker for its disposal

The article presents the results of technological studies on the enrichment of a sample of Waelz clinker from zinc cakes from the Chelyabinsk Zinc Plant by magnetic and flotation methods. The phase and chemical composition of the Waelz clinker of various enterprises is considered, the analysis of the main components of the clinker is carried out. Clinker is a large tonnage solid waste of the zinc sub-industry of non-ferrous metallurgy, has a complex multicomponent composition and is characterized by high contents of iron (36.41%), non-ferrous (Cu 5.28%, Zn 0.93%) and noble (Au 3.8 g / t, Ag 332.2 g / t) metals. Apart from that, there is noticeable content of waste rock, including free carbon (coke breeze), silicone dioxide, calcium oxide, magnesium oxide, alumina. It is shown that, in principle, Waelz-clinker can be separated according to the magnetic flotation scheme without recycle operations to produce four products: a non-magnetic carbon-containing product βC = 21.7%), copper middlings βCu = 11.39-11.69%), flotation coal product βC = 22%) and an iron-containing concentrate in the form of flotation tailings βFe = 60.23%).

THE ROLE AND ADVANTAGES OF TRA VINH PROVINCE IN SEAPORT DEVELOPMENT

The issue of developing a large seaport as a hub of goods import and export for the Mekong Delta has been posed for decades. It is not only the direction of theGovernment, but also the expectation of localities in the Southwest region which has the largest agricultural and aquacultural production for export in the nation. So far, the largest project for seaport infrastructure and navigation channel in the Mekong Delta is the Duyen Hai Power Center seaport project which can accommodate vessels of 30,000 DWT and channel for large tonnage vessels of 10,000 DWT full load to enter Hau River and 20,000 DWT offloading in Tra Vinh Province. Duyen Hai seaport (Tra Vinh) has been studied for more than 15 years, being the only area in the Mekong Delta with sufficient maritime infrastructure such as breakwaters, ports and channels for ships of up to 30,000 DWT, etc. This paper focuses on introducing the role and advantages of Tra Vinh Province in seaport development.

Study on large tonnage pile foundation load test system and field test of long rock-socketed pile

Large tonnage pile foundation load test system is designed in this paper by using pre-stressed technique to optimize the design of anchor pile reaction beam system, in which project pile can be successfully taken as anchor pile. The test results show that the cracks and excessive deformations of the prestressed anti-force device designed in this study have not occurred, and the prestressed tendons of the anchor pile ensure that the anchor pile will not be pulled and fractured, and the prestressed tendons can be reused, thus ensuring the safety and reliability of the test. This test method can directly test bearing capacity of long rock-socketed piles, and analysis bearing behaviors from test results of sensors which embedded in the pile. Through test studied, authors summarized the vertical bearing characteristics of long rock-socketed piles and the main problems that should be paid attention to during design and construction, and provided reliable solutions.

The use of the phosphor of phosphogypsum as a filler for fluorescent polymers

In modern Russia and the CIS countries, phosphogypsum waste is an urgent environmental problem. This product is obtained in the production of phosphoric acid and is a large tonnage of low-recyclable waste. According to open sources, it is processed 20 times less than it is produced. Attempts to use it in cement production, in construction, in agricultural purposes do not lead to a cardinal fracture and it is still accumulating. In this regard, the topic of processing and use of phosphogypsum is an urgent topic. In the modern world there is a demand for bright luminescent colors, paints, consumer goods. An analysis of the literature showed that phosphors can be made from various chemicals, including metal sulfides. The purpose of the work is to study the possibility of obtaining a phosphor from phosphogypsum and its use as a filler-pigment for polymer products. The phosphor was obtained from phosphogypsum by the reduction of phosphogypsum with an organic substance. This phosphor was studied in polyethylene, polypropylene, polystyrene and other polymer matrices. It is shown to be compatible with polyolefins, polystyrene, polyvinyl chloride, nitrocellulose matrices; not compatible with epoxy matrices. It is shown that at the melting temperature of polymers this phosphor does not decompose, does not lose its properties. As a result of the work, conclusions were drawn about the possibility of obtaining a cheap phosphor filler, which is compatible with many industrial polymers. This phosphor can be used in toys, in the manufacture of special luminescent paint and consumer goods..

The 127 Ma gold mineralization in the Wulong deposit, Liaodong Peninsula, China: Constraints from molybdenite Re-Os, monazite U-Th-Pb, and zircon U-Pb geochronology

The Wulong deposit is a large tonnage deposit (>80 t of Au), characterized by quartz vein style of gold mineralization in the Liaodong Peninsula, China. The auriferous quartz veins are mainly hosted by Late Jurassic gneissic two-mica granite (165–157 Ma) and Early Cretaceous granodiorite (129 Ma) and are structurally controlled by NNE- and NW-trending faults. Previous attempts to date the gold mineralization yielded ambiguous results (135–112 Ma). Here we report the first in-situ and direct age constraint for gold mineralization at Wulong. Five molybdenite samples from Mo-bearing quartz ± pyrite veins yielded an isochron age of 127.6 ± 2.3 Ma. In-situ SIMS U-Th-Pb dating of hydrothermal monazite that coexists with gold-bearing pyrite and quartz yielded a 208Pb-232Th age of 126.7 ± 3.2 Ma. These robust ages, together with new age data of the Wulong host intrusion and post-ore dike, allow for a better interpretation of the ore genesis of the Wulong deposit relative to a well constrained sequence of regional geological events. Zircon U-Pb dating of the Wulong host intrusion (gneissic two-mica granite), representing the oldest magmatic event at Wulong, gave a weighted mean age of 159.3 ± 1.4 Ma that is interpreted to be the magma emplacement age. Subsequent magmatic events are recorded by the Early Cretaceous dikes with zircon U-Pb ages between 127 and 113 Ma. A post-ore diorite porphyry dike that crosscuts the Early Cretaceous dikes has a U-Pb zircon age of 121.5 ± 1.5 Ma. All the lines of geochronology evidence suggest a distinct genetic link between the gold mineralization and the Early Cretaceous magmatism in the Wulong orefield. This episode of magmatism and mineralization corresponds to the lithospheric thinning within the northeastern North China Craton, which is triggered by the subduction of the Paleo-Pacific plate.

Analysis of Synchronous Loop of Hydraulic Multi-cylinder Load of 60 MN Super Large Tonnage Compression shear tester

In order to meet the mechanical properties testing requirements of super large tonnage bridge bearings, the 60 MN super large tonnage compression shear test equipment is specially developed. This article systematically carries out load analysis and machine working principle analysis, designs a four-cylinder synchronous control schematic diagram, adopts “master-slave control” position closed-loop feedback, adds force closed-loop feedback to improve system pressure stability, and uses AMESim simulation software to model and simulate actual operating conditions. Optimized control by using PID, the system obtains better displacement accuracy.

Energy improvement of fineblanking press by valve-pump combined controlled hydraulic system with multiple accumulators

To improve the useful energy efficiency of a hydraulic fine-blanking press (HFBP), a hydraulic system using a combined valve-pump combined with multiple accumulators and comprising a valve-controlled circuit and pump-controlled circuit, was presented based on the working-process load characteristics. By adopting multiple accumulators, the slide block mechanical energy was recycled and the system dynamic response speed was improved. The system operation principle was first presented, and the system parameters were calculated based on the energy conservation law. Then, a simulation model was established to analyze the system energy dissipation and distribution. Finally, the proposed system was validated on a 1000-ton HFBP. The results demonstrate that, in comparison with the conventional system, the novel system performs well, while simultaneously achieving a high working speed, high precision and large tonnage. Moreover, the total dissipation energy of this novel system was decreased by approximately 100 kJ in a working cycle, while the energy utilization efficiency was increased by an average of 20% under different load conditions. This novel system can be generalized to any hydraulic press to improve energy efficiency and especially hydraulic presses having a large tonnage.

The igneous petrogenesis and rare metal potential of the peralkaline volcanic complex of the southern Peak Range, Central Queensland, Australia

The Oligocene Peak Range Volcanics (PRV) of central Queensland have intruded through, and erupted onto, Permian sedimentary rocks of the Bowen Basin above what is likely to be a lithospheric-scale suture zone. The southern PRV consists of domes and flows of augite (bearing) trachyte, hornblende trachyte, hornblende rhyolite, arfvedsonite rhyolite and aegirine rhyolite. The aegirine rhyolite bodies represent the most evolved rock types, with peralkaline index (molar Na + K/A) values of >1.3 and extreme enrichment in trace elements, including the rare metals Zr, Hf, Nb, Ta, and REE. Clarrys Dome, one of three aegirine rhyolite domes, features a late stage magmatic agpaitic assemblage of dalyite (K2ZrSi6O15), a eudialyte-like mineral and aegirine, which is variably replaced and overprinted by secondary REE carbonates and Zr silicates.Major and trace element geochemistry are used to show that the suite of PRV rock types represent a fractionation sequence from the least evolved augite trachytes to the most evolved aegirine rhyolites. This rock type range can be modelled by extended alkali-feldspar-dominated fractional crystallisation of an alkali basalt parental melt at a shallow crustal levels. Initial εNd values across the range of rock types are between +3 to +4, which is consistent with a common mantle source. Thus, the extreme trace element enrichment and high peralkalinity of the aegirine rhyolites is the product of the extended fractionation of a melt formed by low-degree partial melting of a mildly depleted mantle source. The secondary ore mineral assemblage and REE redistribution observed in the core of Clarrys Dome is interpreted to be due to a combination of hydrothermal alteration by fluids derived from subjacent devolatilising magma bodies, and late-stage weathering.The extreme enrichment of rare metals in the aegirine rhyolite bodies in the southern PRV support their potential to represent low grade, but large tonnage (100 s of Mt) resources of rare metals. Clear evidence of hydrothermal alteration across the region also raised the potential that higher grade rare metal mineralisation produced by hydrothermal activity may exist in the region.

Development of a method for determination of ship’s loading time distribution under іrregular cargo arrival

A method for determining the time distribution function of ship berthing under loading under the direct option of loading operations (i. e., without the warehouse) in conditions of irregular cargo delivery by rail is developed. In order to take into account uncertainty and risk factors (random arrivals of loaded cars at the terminal and loading volume of cars), it is proposed to use linear Markov processes that describe the dynamics of train arrival and cargo loading on the ship. It is assumed that the intervals between adjacent arrivals of loaded cars at the terminal are exponential random variables. Cargo transshipment from cars on the ship is carried out at a constant rate. The cases when the volume of cargo in cars is a random or constant variable are considered in detail. To find the probability densities and state probabilities of the corresponding Markov process, a system of linear differential equations and initial conditions is derived. A solution to this system of equations in terms of the Laplace transform is found, in particular, the distribution function of the ship berthing time, taking into account possible interruptions while waiting for cargo delivery by cars. For the case of a constant volume of cargo on cars, the corresponding distribution function of the ship berthing time and its asymptotics for a large deadweight tonnage are also found using the central limit theorem. Based on the results obtained, the problem of finding a criterion of expediency of insuring the risk of exceeding the laytime (contractual) of the ship is formulated. It is proved that the results obtained are important for the theory, as well as for the practice of the port operator and shipping companies, since they can reduce the risk of exceeding the ship berthing time under loading operations. A numerical illustration of the proposed method is given

Rice Husk Hydrolytic Lignin Transformation in Carbonization Process.

Lignin processing products have an extensive using range. Because products properties depend on lignin precursor quality it was interesting to study lignin isolated from rice husk being a large tonnage waste of rice production and its structural transformations during carbonization. Lignin isolated by the thermal hydrolysis method with H2SO4 1 wt % solution and its carbonized products prepared under different carbonization conditions were characterized using elemental analysis, IR, TPD-MS, XRD, TEM, and EPR. It was shown lignin degradation takes place over the wide (220–520 °C) temperature range. Silica presenting in lignin affects the thermal destruction of this polymer. Due to the strong chemical bond with phenolic hydroxylic group it decreases an evaporation of volatile compounds and as a result increases the temperature range of the lignin degradation. Rice husk hydrolytic lignin transformations during carbonization occur with generation of free radicals. Their concentration is decreased after condensation of aromatic rings with carbon polycycles formation, i.e., the graphite-like structure. Quantity and X-ray diffraction characteristics of the graphite-like phase depend on carbonization conditions. Morphology of the lignin-based carbonized products is represented by carbon fibers, carbon and silica nanoparticles, and together with another structure characteristics provides prospective performance properties of lignin-based end products.

A directed failure causality network (DFCN) based method for function components risk prioritization under interval type-2 fuzzy environment

Failure risk prioritization of function components plays a key role in the process to redesign a mechanical product. However, the failure causality relationships (FCRs) among failure modes of components are often ignored in the existing design risk assessment methods, leading to inaccurate risk prioritization results. A failure mode in one component can be the cause of a failure mode in another component, and a failure mode with low chance of failure may result in another failure mode with high chance of failure through propagation among failure modes. Thus, the ultimate effects of each failure mode should be determined by considering the effects of failure propagations. In this research, a directed failure causality network (DFCN) model considering FCRs is proposed to describe the FCRs and to predict risks of the designed product. In addition, uncertainties of linguistic terms in evaluation are also considered in the developed model, because linguistic terms are more suitable and natural than quantitative numbers for design engineers to assess design risks based on their knowledge. To describe these uncertainties, interval type-2 fuzzy set is employed to model the designers’ subjective linguistic terms for determining the weights of edges and weights of vertices in the DFCN. A case study for failure risk prioritization of components in redesign of a large tonnage crawler crane (LTCC) is implemented to demonstrate the effectiveness of the proposed method.

BIOACTIVE COMPONENTS OF ETHEREAL EXTRACT OF WOOD GREENING SEA BUCKTHORN HIPPOPHAE RHAMNOIDES L.

The composition of lipophilic components of sea buckthorn leafy shoots, a large tonnage waste in the production of sea buckthorn oil and during renewing the cultural plantings of sea buckthorn, was studied. Tert-butyl methyl ether (TBME) was used as an extraction solvent for raw materials having all the advantages of diethyl ether, but devoid of its disadvantages. It does not form peroxides and does not create increased gas content due to the higher boiling point. The chemical composition of the TBME extract of sea buckthorn leafy shoots was studied by gas chromatography–mass-spectrometry and high-performance liquid chromatography. Seventy-four neutral and thirty-eight acidic components, including polyprenols, dolichols, triterpene alcohols and acids, sterols, were identified. TBME as an extragent provides more high yields of bioactive triterpenoic acids and diols including uvaol, eritrodiol and betulin in comparison with n-hexane. These compounds can increase some useful properties of obtained extract.

Source and possible leaching process of ore metals in the Uragen sandstone-hosted Zn-Pb deposit, Xinjiang, China: Constraints from lead isotopes and rare earth elements geochemistry

The Uragen world-class Zn-Pb deposit is located in the Ulugqat basin in Xinjiang, China. The deposit is characterized by low grade (Zn + Pb ∼3 wt%) and large tonnage of ∼4.84 Mt metals in the southern ore zone and potentially 10 Mt metals for the whole deposit. The deposit is mainly hosted in sandstone and conglomerate of the fifth member of the Lower Cretaceous Kezilesu Group. To provide better constraints on the source of ore metals, systematic analyses of the Pb isotopes and REE were conducted on sulfides and possible source terranes. The sulfides have homogeneous Pb isotopic ratios for 206Pb/204Pb of 18.528–18.690, for 207Pb/204Pb of 15.545–15.743, and for 208Pb/204Pb of 38.429–39.082. These ratios are different from those of the Upper Silurian, Upper Devonian Tangaitaer and Paleocene Aertashi formations, the fourth member of the Lower Cretaceous Kezilesu Group, and the Permian granite. Despite partly overlapping with the values of sulfides, the ratios of the Proterozoic Aksu metamorphic rocks are different in extent and variability. However, the clastic rocks of the fifth member of the Lower Cretaceous Kezilesu Group have almost the same Pb isotopic compositions as the sulfides if the preferential leaching of radiogenic Pb is taken into account. The sulfides in the disseminated ores show LREE-enriched patterns with high LREE/HREE ratios (3.50–12.06), variable changes of Ce anomalies (0.67–1.22) and Eu anomalies (0.52–1.33) that are also similar to those of the clastic rocks of the fifth member of the Lower Cretaceous Kezilesu Group, but are significantly different from those of the basement rocks of the Proterozoic Aksu Group and the evaporite sequences of the Paleocene Aertashi Formation in the Ce and Eu anomalies. Petrographic observations indicate that the clastic rocks of the fifth member of the Lower Cretaceous Kezilesu Group have undergone sedimentation, diagenetic reddening and bleaching. Reddening is related to the in-situ oxidation of mafic minerals such as biotite to produce ferric iron oxide and hydroxide (IOH) that accompanied the liberation of ore metals from the silicate phase. During subsequent crystallization of IOH to hematite, preferential adsorption onto hematite could have been the main mechanism for separating Zn-Pb from Cu. Bleaching resulted from the dissolution of IOH during the oil-gas infilling stage, and, based on mass-balance calculations, substantial amounts of leachable Fe-Zn-Pb were extracted from the red clastic rocks by the ore-forming fluid. Therefore, we propose that the red clastic rocks of the fifth member of the Lower Cretaceous Kezilesu Group may be the predominant source of ore metals in the Uragen deposit, and that the leaching may be possibly related to the bleaching process.