Eastern Hebei Province Research Articles

Risk Assessment of Landfalling Tropical Cyclones in China Based on Hazard Risk Theory

As a frequent hazard, tropical cyclones have a great impact on the social and economic development of China, which is close to the origin of tropical cyclones in the western Pacific Ocean. The primary objective of this study was to construct a comprehensive risk assessment model for tropical cyclone hazards based on natural influencing factors, informing recommendations for hazard prevention and mitigation in affected regions. This research focused on tropical cyclones that made landfall in mainland China and Hainan from 1949 to 2023, utilizing hazard risk theory and classical extreme value theory. The wind speed and rainfall data during the peak cyclone periods (June to October) from 1997 to 2021 gathered from various meteorological stations, as well as altitude and vegetation cover data, were examined. Hierarchical analysis and ArcGIS spatial analysis methods were employed to study the characteristics of the spatiotemporal distribution of landfalling tropical cyclones and the comprehensive risk of tropical cyclone hazards, and the regions of China were delineated according to these methods. The results showed that, during the period from 1949 to 2023, the overall number of landfalling tropical cyclones decreased in a fluctuating manner, while the intensity of the cyclones increased. Furthermore, severe typhoons tended to occur more frequently in the summer than autumn with time, intensifying the challenge to resist short-term hazards. Moreover, the hazard-causing factors in areas affected by tropical cyclones displayed an increasing trend from north to south and from west to east. In detail, the regions sensitive to natural hazards were primarily located in the central part of Liaoning province, Tianjin, central and eastern Hebei province, Shandong province, eastern Henan province, central and northern Anhui province, Jiangsu province, and Shanghai, which are characterized by flat terrain and relatively low vegetation cover. Overall, the comprehensive risk of tropical cyclone hazards showed a geographical distribution that decreases from south to north and from east to west, with coastal cities in provinces such as Hainan, Guangdong, Guangxi, Fujian, and Zhejiang—including Haikou, Zhanjiang, Xiamen, Beihai, and Taizhou—exhibiting the highest levels of risk.

Eoarchean evolution of the North China Craton: Zircon Hf-O isotopic evidence of the ca. 3.8Ga gneiss from eastern Hebei Province

Eoarchean evolution of the North China Craton: Zircon Hf-O isotopic evidence of the ca. 3.8Ga gneiss from eastern Hebei Province

Iterative imaging method based on Tikhonov regularized downward continuation and its unmanned aerial vehicle aeromagnetic application: A case study from a Sijiaying iron deposit in eastern Hebei Province, China

Ore prospecting in the regions under cover has become increasingly significant due to the depletion of open-pit mines and the growing demand for mineral resources. We use a case study of the Sijiaying iron deposit in the eastern Hebei Province, China, to introduce the unmanned aerial vehicle (UAV) aeromagnetic survey as a solution to this challenge. To further enhance the effectiveness of UAV aeromagnetic in ore prospecting in the regions under cover, we develop a new iterative imaging technique based on the Tikhonov regularized downward continuation (TRDC) method. This technique aims to achieve high-resolution imaging results and to improve the identification of weak anomalies. The new method involves obtaining the depth and the magnetic values of the sources using the TRDC at different depths. The magnetic values are then converted into magnetization distribution imaging using a forward calculation in the wavenumber domain. Finally, an iterative cycle calculation is performed to focus on the imaging result and produce the compact magnetization solution. Synthetic models are used to evaluate and compare the new proposed method with the traditional iterative compact depth from extreme point method. The newly proposed method demonstrates higher resolution and better capability in capturing weak information of deeper or smaller sources because it leverages the advantages of downward continuation. Two iterative imaging methods are applied to UAV aeromagnetic data acquired from the Sijiaying iron deposit in the eastern Hebei Province. These methods display the possibility of deep ore body and are consistent with geologic inference. The new method outperforms in describing the weak sources, identifying the trend, and the extension of ore bodies. Based on the results and UAV aeromagnetic data, we recommend that it is necessary to strengthen the verification of weaker anomalies and deep prospecting in Sijiaying, Hebei, China.

Tracing the Early Crustal Evolution of the North China Craton: New Constraints from the Geochronology and Hf Isotopes of Fuchsite Quartzite in the Lulong Area, Eastern Hebei Province

Understanding the composition, formation and evolution of the oldest continental crust is crucial for comprehending the mechanism and timing of crustal growth and differentiation on early Earth. However, the preservation of the ancient continental crust is limited due to extensive reworking by later tectonothermal events. In the Lulong area of eastern Hebei, abundant ca. 3.8–3.4 Ga detrital zircons of the fuchsite quartzite have been previously identified. Nonetheless, the provenance and Hf isotopic compositions of the fuchsite quartzite remain unclear. In this study, we present new detrital zircon ages and Hf isotopic for the fuchsite quartzite in the Lulong area to establish the timing of deposition, the provenance and the regional stratigraphic relationship. Zircon U-Pb dating indicates that the fuchsite quartzite was deposited between 3.3–3.1 Ga and most grains were sourced from the 3.8 Ga TTG gneisses and Paleoarchean magmas. Field investigations and regional correlations reveal that the fuchsite quartzite from the Lulong area is equivalent to that of the Caozhuang area. Zircon Hf isotopic data from eastern Hebei Province (Lulong and Caozhuang areas) and Anshan and Xinyang areas indicate that the oldest crustal growth event of North China Craton occurred in the Hadean.

Chronolgy and Geochemistry of the Sijiaying Iron Deposit in Eastern Hebei Province, North China Craton: Implications for the Genesis of High-Grade Iron Ores

The Sijiaying iron deposit is located in the Eastern Hebei area of the southern section of the northern margin of the North China Craton (NCC) and is the largest single iron deposit in China. The deposit contains many banded iron formations (BIFs) and was proven to have more than 3 million tons of high-grade iron ore resources. This study carried out geochemistry and zircon U–Pb analysis of normal-grade iron ore, high-grade iron ore, and wall rock (biotite–leptynite, chlorite–sericite schist) in the Sijiaying deposit and discussed the genesis and metallogenic age of high-grade iron ore. BIFs have low concentrations of Al2O3 and TiO2 and high field strength element (HFSE) depletion, indicating almost no contamination via terrestrial debris. The standardized post-Archean Australian shale (PAAS) rare earth element (REE) distribution pattern indicates that the iron formation exhibits positive Eu, Y, and heavy rare earth element (HREE) anomalies and lacks negative Ce anomalies, indicating that the Sijiaying BIF was enriched with iron sources via high-temperature hydrothermal fluids from the seabed and deposited in an anoxic ancient marine environment. In addition, geological field work identified two types of high-grade iron ore in the mining area: primitive sedimentary and hydrothermally altered high-grade iron ore. Further ore geochemical research showed that the primitive sedimentary-type iron ore is similar in geochemistry to the BIF. In addition to low Eu/Eu* values, the hydrothermally altered high-grade iron ore shows geochemical characteristics similar to those of the BIF, suggesting that they share the same iron source but did not form at the same time. The total large ion lithophile element (LILE) (Sr, Ba, Pb) contents in primitive sedimentary-type high-grade iron ore are higher than those in hydrothermally altered high-grade iron ore, indicating that LILEs are carried away via fluids during the hydrothermal alteration process in normal-grade iron ore. The geochemical characteristics of biotite–leptynite and chlorite–sericite schist include high contents of SiO2 and Al2O3, light rare earth elements (LREEs), LILE enrichment (Rb, Ba, Sr, Zr), and HFSE depletion (Nb, Ta, P, Ti), characteristics that are similar to island arc volcanic rocks. The reconstruction of the original rock indicates that the wall rock is a product of volcanic sedimentary cycles in an island arc setting. Zircon cathodoluminescence images and LA–ICP–MS zircon U–Pb dating can be divided into four age groups (3283 Ma, 2547 Ma, 2500 Ma, and 2407 Ma), which correspond to the earliest volcanic activity in eastern Hebei, the main mineralization age of the Sijiaying BIF (the mineralization age of primitive sedimentary high-grade iron ore), a regional tectonic–metamorphic event, and the occurrence of migmatization (the mineralization age of hydrothermally altered high-grade iron ore), respectively. Therefore, the Sijiaying BIF and primitive sedimentary high-grade iron ores were deposited and mineralized at 2547 Ma, and the iron orebody was later altered via the hydrothermal solution at 2407 Ma, forming large-scale high-grade iron ores.

A Brief Analysis of Music Art of the Chinese Shadow Puppetry in Tangshan City

Tangshan Shadow Puppetry is a prominent and widely-influential genre of traditional Chinese drama that has gained immense popularity in the regions of eastern Hebei province and the three northeastern Chinese provinces. Its unique music artistry holds a significant and integral position in the art form, serving as a cornerstone of the performance. This paper conducts a comprehensive analysis of the historical development of Tangshan Shadow Puppetry's music, including its vocal styles, lyrics, accompanying instruments, and the crucial inheritance of its musical artistry, in order to contribute to the theoretical understanding of the artistic heritage and development of Tangshan Shadow Puppetry music.

Petrogenesis of high heat production granite in eastern Hebei Province, China: Constraints from geochronology, geochemistry and Sr-Nd-Hf-O isotopes

Petrogenesis of high heat production granite in eastern Hebei Province, China: Constraints from geochronology, geochemistry and Sr-Nd-Hf-O isotopes

Gravity and magnetic field features and the prospects of iron deposits in the eastern Hebei province, China

To study the features of the gravity and magnetic anomalies and the prospects of iron deposits in the eastern Hebei province, we have collected and arranged gravity data at scales of 1:50,000 and 1:200,000 and aeromagnetic data at scales of 1:25,000 and 1:200,000. Then, we have separated the Bouguer gravity anomaly and the aeromagnetic anomaly by reduction to the pole (RTP) by the moving average method and processed these two anomalies using the total horizontal gradient method and the vertical second derivative method. Combined with existing geologic and geophysical research, we have studied the features of the gravity and magnetic anomalies and investigated the corresponding relationship between the distribution of iron deposits and these anomalies, and then we predicted the favorable areas for iron deposits in the eastern Hebei province. The results find that there is a good corresponding relationship between the distribution of iron deposits and the gravity and magnetic anomalies in the eastern Hebei province. Identification marks of the gravity and magnetic anomalies are determined to find the iron deposits in the eastern Hebei province, including the magnetic highs of the local magnetic anomaly and the vertical second derivative anomaly, the gravity highs of the local gravity anomaly and the vertical second derivative anomaly, the gradient belts of the Bouguer gravity anomaly, the high-value zones of the RTP aeromagnetic anomaly, and the extreme-value zones of the total horizontal gradient of the Bouguer gravity anomaly and the RTP aeromagnetic anomaly. There are 17 favorable areas for iron deposits in the eastern Hebei province, and these favorable areas display complex trends, including east–west-trending, north-northwest-trending, and northeast-east-trending features.

Fe isotopic evidence that “high pressure” TTGs formed at low pressure

Tonalite–trondhjemite–granodiorite (TTG) rocks consitute the dominant felsic lithology of the Archean crust in most cratons, but their petrogenesis and geodynamic setting are still matters of great debate. Here, we report new Fe isotopic analyses for ca. 2.5 Ga diorites and TTGs with compositions typically interpreted to reflect a high-pressure affinity in eastern Hebei Province of the North China craton. Whole-rock Fe3+/∑Fe and δ56Fe of the trondhjemites show strong correlations with MgO and Fe2O3T, both indices of igneous differentiation, supporting the radical reinterpretation that the apparent “high pressure” signatures in the trondhjemites instead formed by amphibole-dominated fractionation at low pressure. Likewise, for the tonalites, their light Fe isotopes make them unlikely to be the melting products of enriched mafic rocks at high pressure within the garnet stability range. Thus, Fe isotopes support that “high pressure” TTGs in verity formed at lower pressure with little involvement of residual garnets. Our results thus challenge the evidence once purported to infer Archean subduction.

Response of soil bacterial community structure and function under two salt-tolerant plants in a coastal saline soil area of eastern Hebei province of China

The plants Feicai (Sedum aizoon L.) and dandelion(Taraxacum mongolicum Hand.-Mazz.) have good salt tolerance, and can improve soil quality and the micro-ecological environment. Coastal saline-soil plots planted with S. aizoon and T. mongolicum and bare plots were used to explore their effects on the microbial community structure of coastal saline soil. The diversity and function of soil bacterial communities were analyzed using Illumina MiSeq high-throughput sequencing technology. The results showed that the α-diversity of soil bacterial communities were higher in planted than in bare plots, in the following order: T. mongolicum plot > S. aizoon plot > bare plot. The soil bacterial communities also changed after planting S. aizoon and T. mongolicum. The LDA effect size analysis showed that there were 37 indicator species among the three plot types. Correlation analysis of environmental factors showed that EC, AP, and OM were the main factors influencing bacterial community composition in this coastal saline soil. The PICRUSt functional prediction showed that the numbers of metabolic functions of bacterial communities were in the following order: T. mongolicum plot > S. aizoon plot > bare plot. The results provide a theoretical basis and plant species for developing salt-tolerant bacterial resources and phytoremediation of coastal saline soil.

Origin of the dioritic porphyrite and its associated Matouniu skarn gold polymetallic deposits in the Eastern Hebei Province, North China: Evidence from geochronology, geochemistry, and C–O–S–Pb–Hf isotopes

The Matouniu gold polymetallic deposit in the Eastern Hebei Province (Jidong) in the northern margin of the North China Craton (NCC) is a skarn‐type ore deposit. Geochemical data, zircon U–Pb, and Hf isotope analysis of the mineralization‐related dioritic porphyrite and C–O–S–Pb isotopes from the deposit were used to investigate the origin, magmatic evolution, mineralization, and tectonic setting of the Matouniu gold polymetallic deposit. Zircon U–Pb dating reveals an emplacement age of 146.7 ± 1.1 Ma, indicating that the magmatism and mineralization occurred during the Late Jurassic. Geochemical, Hf, and Pb isotopic compositions indicate that the dioritic porphyrite was formed by the partial melting of the ancient mafic lower crust, leaving behind residual plagioclase, amphibole, and garnet, with traces of mantle material involvement. The S and Pb isotopic compositions revealed that both the ore‐forming materials and the dioritic porphyrite were derived from a deep‐seated magmatic source, which mainly originated from the lower crust, with minor input from the mantle. The C–O isotopic compositions suggest that the early ore‐forming fluids had a mainly deep‐seated magmatic source with minor meteoric water involvement, and were accompanied by continuous meteoric water involvement and water‐rock interaction during the fluid migration. The Matouniu gold polymetallic deposit and Late Jurassic dioritic porphyrite associated with skarn mineralization formed under geodynamics involved a compressional regime that was associated with the continuous subduction of the Palaeo‐Pacific Plate beneath the East Asia Plate.

Formation of the Jinchangyu Au deposit, eastern Heibei Province, China: Melts and fluids derived from a highly fractionated magma

The Jinchangyu deposit is the largest Au lode deposit in eastern Hebei Province of China and is located along the northern margin of the North China Craton. It was previously thought that this deposit was a greenstone belt-type as the orebodies are controlled by ductile shear structures in amphibolite units of the Archean Zunhua Group. However, new geological and petrographic observations presented here show that the mineralization was actually controlled by the brittle schistosity in the amphibolite and the ore-bearing quartz–albite veins are actually albite-rich granite porphyry dikes that coexist with graphic pegmatite dikes. Based on geological and geochemical features, we propose that the Jinchangyu Au deposit is actually a magmatic–hydrothermal type formed by melt–fluid derived from a highly fractionated magma. The ore-bearing albite-rich granite porphyry and pegmatite dikes are metaluminous to weakly peraluminous, and belong to the low-K tholeiitic to shoshonitic and subalkaline series. All the samples have high SiO2, K2O + Na2O contents and differentiation index values, low CaO, MgO, P2O5, and TiO2 contents, are enriched in Th, U, Ta, Nb, Sr, Zr, and Hf, depleted in Ba, K, P, Ti, and δEu, and exhibit the tetrad rare earth element effect. The mineralogy and geochemistry indicate the dikes are highly fractionated I-type granites, and that the Jinchangyu Au deposit was generated during magmatic differentiation. δ34S values of pyrite vary from –6.3‰ to 4.2‰, and H–O isotopic compositions of quartz from quartz–pyrite veins indicate the mineralizing fluid had a predominantly magmatic source. Lead isotope ratios (206Pb/204Pb = 15.65–16.18, 207Pb/204Pb = 15.16–15.29) of pyrite in the quartz–pyrite veins indicate the ore-forming materials were derived from a mixed source containing mantle and crustal materials. Geochemical features indicate that the dikes formed in a post-collsional extensional tectonic setting during the Late Triassic, after closure of the Paleo-Asian Ocean. Combined with data from previous studies, we propose that the parental magma and ore-forming materials of the Jinchangyu Au deposit were derived from a mixed source containing mantle and crustal material, underwent extensive differentiation, and then sequentially formed the ore-bearing albite-rich granite porphyry dike dikes, graphic pegmatite dikes, and quartz–albite, quartz–pyrite, and quartz–carbonate veins.

North China craton: The conjugate margin for northwestern Laurentia in Rodinia

Abstract In the Rodinia supercontinent, Laurentia is placed at the center because it was flanked by late Neoproterozoic rifted margins; however, the conjugate margin for western Laurentia is still enigmatic. In this study, new paleomagnetic results have been obtained from 15 ca. 775 Ma mafic dikes in eastern Hebei Province, North China craton (NCC). Stepwise thermal demagnetization revealed a high-temperature component, directed northeast or southwest with shallow inclinations, with unblocking temperatures of as high as 580 °C. Rock magnetism suggests the component is carried by single-domain and pseudo-single-domain magnetite grains. Its primary origin is supported by a positive reversal test and regional remanence direction correlation test, and the paleomagnetic pole (29.0°S, 64.7°E, A95 = 5.4°) is not similar to any published younger poles of the NCC. Matching the late Mesoproterozoic to early Neoproterozoic (ca. 1110–775 Ma) apparent polar wander paths of the NCC and Laurentia suggests that the NCC could have been the conjugate margin for northwestern Laurentia in Rodinia, rather than sitting off the northeast coast of the main Rodinian landmass. Geological data indicate that breakup of the NCC and Laurentia occurred between ca. 775 and 720 Ma.

Climate Adaptability Analysis of Dwellings in Eastern Hebei Province under Building Energy Efficiency Context

Building energy efficiency plays a vital role in solving conflicts between energy resource supply and social economic development and accelerating the development of circular economy. On the basis of “Regulations for Energy Efficiency of Civil Buildings in Hebei Province”, combined with Climate Consultant, the paper analyzes the meteorological data of dwellings in Eastern Hebei Province, obtains suitable for dwellings climate policy and valid time in the region. Through above analysis, the paper concludes the passive strategy suitable for dwelling construction so as to provide viable architectural design and energy-saving strategies for the application of energy-saving technologies, planning and construction in Eastern Hebei Province.

Timing of multiple magma events and duration of the hydrothermal system at the Yu’erya gold deposit, eastern Hebei Province, China: Constraints from U–Pb and Ar–Ar dating

The Yu’erya deposit is a large granite–hosted gold deposit in the eastern Hebei Province classified as an intrusion–related gold system. The Yu’erya complex contains the causative intrusion which was the source of hydrothermal metal-bearing fluids. This composite granite complex contains miarolitic pegmatite(–like) cavities and pegmatite veins. A combination of detailed field observations and U–Pb dating by SHRIMP and LA–ICP–MS is used to document multiple magmatic events which occurred at 210–220, 175–173, 171–170, 167–166 and ~161 Ma formed the Yu’erya granite complex. The initiation of the hydrothermal system, as determined via Ar–Ar dating, is closely related to the exsolution of a magmatic volatile phase from the G1 granite at ca.176 Ma. The hydrothermal system operated for ~16 my (176–160 Ma) and produced multiple mineralising events (~176, 172–168 and 162–160 Ma) linked to emplacement of repeated magma pulses from 175 Ma to 161 Ma. Our results suggest that multiple magmatic–hydrothermal events over a time period of several million years may be a fundamental factor responsible for the enrichment process during formation of intrusion-related gold deposits and thus may be a requirement for forming economic orebodies.

Pollution Characteristics, Transport Pathways, and Potential Source Regions of PM2.5 and PM10 in Changchun City in 2018

Air pollution has attracted increasing attention in recent years. Cluster analysis, scene analysis, and the potential source contribution function (PSCF), based on the backward trajectory model, were used to identify the transport pathways and potential source regions of PM2.5 and PM10 (particulate matter with an aerodynamic diameter of not more than 2.5 µm and 10 µm) in Changchun in 2018. In addition, the PSCF was slightly improved. The highest average monthly concentrations of PM2.5 and PM10 appeared in March and April, when they reached 53.9μg/m3 and 120.0 μg/m3, respectively. The main potential source regions of PM2.5 and PM10 were generally similar: western Jilin Province, northwestern Inner Mongolia, northeastern Liaoning Province, and the Yellow Sea region. The secondary potential source regions were southern Russia, central Mongolia, western Shandong Province, eastern Hebei Province, and eastern Jiangsu Province. The northwest and southwest directions were found to be the two pathways that mainly affect the air quality of Changchun City. Moreover, the northwestern pathway had a larger potential contribution source area than the southwestern pathway. The airflow in the southwest direction came from Liaoning Province, Shandong Province, and the Yellow Sea region. This mainly occurred in summer; its transmission distance was short; it had a relatively higher weight potential source contribution function (WPSCF) value; it can be regarded as a local source; and its representative pollutants were SO2 (sulfur dioxide), CO (carbon monoxide), and O3 (ozone). The northwestern pathway passed through Russia, Mongolia, and Inner Mongolia. The transmission distance of this pathway was longer; it had a relatively lower WPSCF value; it can be considered as a natural source to a certain extent; it mainly occurred in autumn and, especially, in winter; and the representative pollutants of this pathway were NO (nitric oxide), NOx (nitrogen oxide), PM2.5, and PM10.

Human Health Risk Assessment of Heavy Metals in Groundwater in the Luan River Catchment within the North China Plain

The Luan River catchment within the North China plain has been famous for the development of its iron mineral resources since the 1950s. At the same time, it is also the main grain-producing area, known as the granary of eastern Hebei Province. Groundwater plays an important role in this region, and thus, it is imperative for us to improve our understanding of the heavy metal groundwater contamination in this catchment. Therefore, a total of 144 groundwater samples were collected for chemical analysis from 16 operational private wells of local residents in the study area, over eight consecutive periods from December 2016 to May 2017. Each shallow groundwater sample was analyzed for 39 heavy metals including among others, As, B, Ba, Be, Cd, Cr, Cu, Fe, Li, Mn, Mo, Ni, Sb, Se, Sn, Sr, V, and Zn. However, subsequent analyses only focused on three heavy metals (Cd, Cr, and Ni) that exceeded the Groundwater Quality Standard III. Spatial and temporal variations of Cd, Cr, and Ni in the shallow groundwater were analyzed. Cr was found to have the highest concentrations, followed by Ni and Cd. A human health risk assessment was conducted where carcinogenic risks and Hazard Quotients (HQs) were evaluated separately. The results indicate that both the carcinogenic risks and HQs of Ni and Cr are higher than the recommended standard value. Therefore, the prevention and control of heavy metal contamination in the Luan River catchment should focus on Ni and Cr.

Petrogenesis and implications of Early Jurassic igneous rocks from eastern Hebei Province

Petrogenesis and implications of Early Jurassic igneous rocks from eastern Hebei Province

Auriferous pyrite Re–Os geochronology and He-Ar isotopic compositions of the Jinchangyu Au deposit in the northern margin of the North China Craton

The Jinchangyu Au deposit is the largest quartz-vein gold deposit in eastern Hebei Province, China, in the northern margin of the North China Craton (NMNCC). Three mineralization stages are identified based on crosscutting relationships and mineral assemblages, with Au occurring mainly in pyrites in quartz–sulphide veinlets and quartz–albite veins. Five low-level highly radiogenic pyrite samples in the quartz–sulphide veinlets yielded a Re–Os isochron age of 223.5 ± 6.0 Ma. Auriferous pyrite He–Ar isotopic analyses indicate that the ore-forming fluid was a mixture of mantle-derived and crustal fluids. 3He/4He ratios are in the range 1.72–3.92 Ra, corresponding to 22%–50% mantle He contribution. These high 3He/4He ratios are related to lithospheric thinning in the NMNCC during the Middle–Late Triassic, with initial thinning during that period being supported by the wide distribution of Indosinian Au deposits and the regional tectonic and magmatic evolution. The mineralization of the Jinchangyu deposit and of other similar Triassic deposits was a response to post-orogenic to intraplate lithospheric extension after collision between the NCC and the southern margin of the Siberian Plate.

Metamorphic P–T paths for the Archean Caozhuang supracrustal sequence, eastern Hebei Province, North China Craton: Implications for a sagduction regime

Archean supracrustal rocks of amphibolite-facies occur as enclaves within granitoids gneiss domes and belts between domes, representing collision or sagduction regimes. In order to distinguish between tectonic regimes using metamorphic patterns, systematic data on metamorphic evolution and zircon age dating are presented for the Caozhuang supracrustal sequence of eastern Hebei Province, China, which occurs as enclaves in gneisses. A garnet biotite gneiss records a P–T path involving pre-peak isobaric heating to peak conditions at 780–800 °C and 10–11 kbar (medium-P/T type), followed by decompression to 5–6 kbar. Two Mg/Al-rich schists from the same locality show low P/T conditions of 6–7 kbar/690–750 °C and 4–7 kbar/750–780 °C, similar to that of the decompression stage for the biotite gneiss. Zircon age dating suggests that the amphibolite-facies metamorphism occurred at ∼2.49 Ga, coeval with TTG magmatic activities. Combined with a summary of the metamorphism from Kaapvaal and Pilbara Cratons, we concluded that Archean amphibolite-facies supracrustal rocks occurring as enclaves and belts show different metamorphic patterns. The former exhibits the metamorphic patterns the same as those recovered for the Caozhuang rocks, characteristic of pre-peak isobaric heating to 600–800 °C at 10–12 kbar followed by isothermal decompression with the overprinting of medium- and/or low-P/T assemblages in different enclaves. The latter shows medium- or high-P/T peak conditions mostly lower than 600–650 °C followed by decompression, lacking the pre-peak heating. These metamorphic patterns could be good indicators of a sagduction regime.