Sino Korean Research Articles

Fruits and Tasks of the Education of Sino Korean Words

Fruits and Tasks of the Education of Sino Korean Words

Research about sino Korean teachers’ knowledge of assessment - with in the boundaries of a focus on PCK assessment consulting-based supervision

Research about sino Korean teachers’ knowledge of assessment - with in the boundaries of a focus on PCK assessment consulting-based supervision

漢文科 敍述型 評價의 理論과 實際 -‘漢文 知識’ 領域을 中心으로-

漢文科 敍述型 評價의 理論과 實際 -‘漢文 知識’ 領域을 中心으로-

SHRIMP dating of magmatism in the Hitachi metamorphic terrane, Abukuma Belt, Japan: Evidence for a Cambrian volcanic arc

AbstractIon microprobe dating of zircon from meta‐igneous samples of the Hitachi metamorphic terrane of eastern Japan yields Cambrian magmatic ages. Tuffaceous schist from the Nishidohira Formation contains ca 510 Ma zircon, overlapping in age with hornblende gneiss from the Tamadare Formation (ca 507 Ma), and meta‐andesite (ca 507 Ma) and metaporphyry (ca 505 Ma) from the Akazawa Formation. The latter is unconformably overlain by the Carboniferous Daioin Formation, in which a granite boulder from metaconglomerate yields a magmatic age of ca 500 Ma. This date overlaps a previous estimate for granite that intrudes the Akazawa Formation. Intrusive, volcanic, and volcaniclastic lithologies are products of a Cambrian volcanic arc associated with a continental shelf, as demonstrated by the presence of arkose and conglomerate in the lowermost Nishidohira Formation. Granitic magmatism of Cambrian age is unknown elsewhere in Japan, except for a single locality in far western Japan with a similar geological context. Such magmatism is also unknown on the adjacent Asian continental margin, with the exception of the Khanka block in far northeastern China. A ‘great hiatus’ in the Paleozoic stratigraphy of the Sino–Korean block also exists in the Hitachi terrane between Cambrian volcanic arc rocks and Early Carboniferous conglomerate, and may indicate a common paleogeographic provenance.

A Study on ‘Sentence Forms’ and ‘Rhetorics’ in the ‘Sino Korean Knowledge’ Area of the 2007 Revised Sino Korean Curriculum

A Study on ‘Sentence Forms’ and ‘Rhetorics’ in the ‘Sino Korean Knowledge’ Area of the 2007 Revised Sino Korean Curriculum

New Lu–Hf geochronology constrains the onset of continental subduction in the Dabie orogen

The Tongbai–Dabie–Sulu orogen contains several eclogite-bearing terranes that were largely metamorphosed in Triassic time. Although petrologic and geochronologic data from these terranes have provided essential information on the geodynamic history of the orogenic cycle, the timing of onset of continental collision between Sino–Korean craton and the Yangtze craton is still unknown. To better our understanding of the transitional time of oceanic to continental subduction in this orogen, we have dated an eclogite with continental affinity in the Tongbai Mountains, located in the very west part of the Tongbai–Dabie–Sulu orogen, central China, using Lu–Hf geochronology. These eclogites formed at pressure temperature conditions of 1.8–2.1GPa and 490–540°C. Mineral–whole rock ages of multi-garnet fractions from three localities yield Lu–Hf ages of 256.4±2.6Ma, 252.3±3.4Ma and 246.9±3.2Ma. Garnet porphyroblasts from the three samples display evidence of prograde zoning but the major portion of the garnet grains grew exclusively at eclogite-facies conditions due to the occurrence of omphacite inclusions from core to rim. Taking the spherical geometry effect into account, these Lu–Hf ages are, therefore, interpreted to reflect high-pressure eclogite-facies metamorphism instead of the early phase of garnet growth despite the well-preserved prograde major- and trace-element zoning in garnets. Our results allow for a more detailed and complete picture of the tectonic evolution of the Tongbai–Dabie–Sulu orogen during the transitional time of oceanic to continental subduction. These new Lu–Hf ages mark the timing of onset of continental collision between Sino–Korean craton and the Yangtze craton, suggesting that the entry of the leading edge of the Yangtze craton continent into the Sino–Korean craton trench occurred no later than ca. 256Ma.

DISTRIBUTION AND CONTROLLING FACTORS OF MAJOR ELEMENTS IN SEDIMENTS OF THE YALU RIVER ESTUARY

Contents of major elements in the sediments of the Yalu River estuary were tested,and multivariate statistical analysis methods were used to analyze the characteristics of major element distribution in the study area. The major element contents show a small fluctuation in sediments in the tidal flat and in the west area of the estuary,and the fluctuation is more obvious upstream and at the river mouth of the Yalu River. Two peaks appear in the estuarine turbidity maxima zones. R-mode main factor analysis results show that grain size effect plays a dominant role in distribution of the contents of major elements,with the variance contribution of the first principal component up to 76.55%. Q-mode cluster analysis classifies the stations into two types,which suggests that difference of depositional dynamic environment is the main factor affecting geochemistry division pattern of the major elements. In addition,the major elements content in sediments of the Yalu River estuary is similar to that of the Korea River,to granite at Sino Korean paraplatform and Korean Peninsula,and different from that of the Yangtze River and the Yellow River.

The Effect of the Creative Training Techniques on Achievement Motivation and Academic Achievement in Sino Korean Education of Junior High School

The Effect of the Creative Training Techniques on Achievement Motivation and Academic Achievement in Sino Korean Education of Junior High School

The Teaching and Learning Effect of the Creative Training Techniques on the Affective Characteristics and Academic Achievement in Sino Korean Education of Junior High School

The Teaching and Learning Effect of the Creative Training Techniques on the Affective Characteristics and Academic Achievement in Sino Korean Education of Junior High School

A response to S.V. Zyabrev’s critical paper entitled “On the biostratigraphy of accretionary complexes of the Far East: A critical review of several papers”

(including us)could have anticipated that the author would considerin his paper really important and topical problems ofbiostratigraphic studies of such intensely dislocatedsedimentary complexes as fragments of old accretionary prisms. Biostratigraphy, as stratigraphy, is knownto be the basis both for tectonic reconstructions andfor the formation of correct ideas about the geologicalstructure of individual regions of the Earth’s crust.This is especially urgent for the Far East region, which,according to numerous data of the past decades [4, 8,9–12, 14, 15, 18, 19, and others], is interpreted as acollage of genetically heterogenic terranes of differentages that were accreted to the eastern edge of the Siberian and Sino–Korean cratons in the Mesozoic–Cenozoic. It is evident that the establishing of the structureof different terranes on the basis of the biostratigraphicdata (as well as the time of their involvement into thecontinent’s structure) and the age of the overlyingcomplexes joining the terranes is a necessary andimportant condition for solving such fundamentalproblems as the geodynamic evolution of the Pacificmargin and Asia and the correlation of the geologicalprocesses in the zone transitional from the Eurasiancontinent to the Pacific Ocean.In this connection, one might expect thatS.V. Zyabrev in his paper would bring to the attentionof geologists new techniques and approaches for carrying out biostratigraphic studies of intensely dislocated complexes; new methods elaborated by him forextracting microfossils that improve the qualitativeand quantitative characteristics of paleontologicalmaterials for the more precise determination of thetime of their mutual coexistence; refined data on thetime ranges for individual radiolarian species, which isalso of importance for substantiating the age of thesedimentary rocks enclosing them; or results of thelatest or his own biostratigraphic investigationsimproving (changing) our understanding about thegeological structure of a certain region. S.V. Zyabrev,however, gave preference to quite another version of“biostratigraphic studies,” namely, revision of dataobtained by other researchers. It should be noted thatsuch a version is available in the geological practice,but it is used in cases when earlier biostratigraphicscales underwent essential transformations by virtue ofrefinement of the time ranges for individual fauna species, or revision of the syst ematics of some of them, orby virtue of the inconsistency of the time intervalsdetermined using different fauna groups for the samesedimentary complexes. However, the author of thepaper under discussion mentioned other reasons. Theprincipal among them are the following: incorrectdiagnostics of microfossils by other researchers, theuse of different biostratigraphic scales for establishingthe age of radiolarian assemblages, the interpretationof dislocated stratigraphic successions as practicallycontinuous, the narrowing of the time interval at theexpense of the time intervals of the underlying andoverlying deposits, and some others.When reading the arguments suggested byS.V. Zyabrev for each of the mentioned points, itbecomes evident that the claims made by him are subjective and unsubstantiated. It is easy to show by theexample of even one (let it be the first) of the papersunder criticism, which was written by researchers fromthe Far East Geological Institute about the volcanogenic–siliceous complexes in the lower reaches of theAmur River [17]. Thus, S.V. Zyabrev casts doubt onthe correct identification of the species

日本列島の地体構造区分再訪―太平洋型（都城型）造山帯構成単元および境界の分類・定義―

The geotectonic subdivision and relevant definitions of geotectonic units in the Japanese Islands are revised on the basis of new data, particularly with detrital zircon dating of U-Pb ages and seismic profiling of the deep arc crust across the islands. In addition to the final confirmation of the subhorizontal structures of the Paleozoic to Cenozoic accretionary complexes and their high-P/T metamorphosed equivalents, several new aspects were recognized; i.e., detection of the eastern extension of the collisional suture between the Sino-Korean and Yangtze cratons in the Higo belt with medium-pressure-type metamorphism in SW Japan, and separation of the traditional Sanbagawa belt into two distinct metamorphic belts characterized by mutually different ages of protolith AC-formation and peak metamorphism. The occurrence and consumption of 4 Paleozoic to Mesozoic granite batholiths, as major provenances for the ancient Japanese Islands, are documented by detrital zircon dating of Paleozoic–Mesozoic sandstones. With respect to these new findings, the definitions of unit boundaries were thoroughly revised in terms of chronological spectrum in “ocean plate stratigraphy–metamorphism”. The geological significance of 5 major tectonic lines (faults) of the Pacific-type (or Miyashiro-type) orogen in Japan, i.e., the Nagato–Hida marginal TL, Osayama–Omi TL, Ishigaki–Kuga TL, Paleo–Median TL, and Butsuzo TL, is discussed. The current revision of the geotectonic subdivision and definitions of component units and their mutual boundaries leads to the following conclusions, which challenge the conventional understanding of the orogenic history of the Japanese Islands. (1) Proto-Japan in the Early Paleozoic was located closer to the South China (Yangtze) craton rather than the North China (Sino–Korean) craton. (2) Ever since 520 Ma, subduction of past Pacific ocean floors formed mature arc-trench systems with a full set of granite batholith, fore-arc basin, accretionary complex, and high-P/T metamorphosed equivalents at least 5 times; however, the former 4 sets were almost completely destroyed, with the exception of smaller tectonic blocks that currently occur within serpentinite melange. (3) Tectonic erosion played a significant role in consuming ancient fore-arc crusts including 4 granite batholiths of the Paleozoic to mid-Mesozoic. (4) Serpentine melange represents the former Wadati–Benioff plane along which tectonic erosion took place. (5) The Japanese Islands, which basically developed along the Yangtze continental margin, have experienced multiple episodes of oceanward growth and continentward retreat due to alternating subduction-accretion and tectonic erosion. (6) Net production of juvenile crust occurred on a large scale along the Japan margin during the 500 million year-long oceanic subduction regime since the Cambrian; however, intensive tectonic erosion effectively erased the older crusts from the surface and enriched the underlying sub-arc mantle with heat-generating continental material.

40Ar/39Ar Constraints on the tectonic history and architecture of the ultrahigh‐pressure Sulu orogen

AbstractNew 40Ar/39Ar ages are presented from the giant Sulu ultrahigh‐pressure (UHP) terrane and surrounding areas. Combined with U‐Pb ages, Sm‐Nd ages, Rb‐Sr ages, inclusion relationships, and geological relationships, they help define the orogenic events before, during and after the Triassic collision between the Sino–Korean and Yangtze Cratons. In the Qinling microcontinent, tectonism occurred between 2.0 and 1.4 Ga. The UHP metamorphism occurred in the Yangtze Craton between 240 and 222 Ma; its thermal effect on the Qinling microcontinent was limited to partial resetting of K‐feldspar 40Ar/39Ar ages. Subsequent unroofing at rates of 5–25 km Myr−1 brought the UHP terrane to crustal levels where it underwent a relatively short amphibolite facies metamorphism. The end of that metamorphism is marked by 40Ar/39Ar ages in the 219–210 Ma range, implying cooling at crustal depths at rates of 50–200 °C Myr−1. Ages in the 210–170 Ma range may reflect protracted cooling or partial resetting by Jurassic or Cretaceous magmatism. Jurassic 166–149 Ma plutonism was followed by cooling at rates of c. 15 °C Myr−1, suggesting relatively deep crustal conditions, whereas Cretaceous 129–118 Ma plutonism was succeeded by cooling at rates of c. 50 C Myr−1, suggesting relatively shallow crustal depths.

第7次 漢文科 改定 敎育課程 評價 硏究 試論

第7次 漢文科 改定 敎育課程 評價 硏究 試論

Lithospheric thickness modeled from long-period surface wave dispersion

The behavior of surface waves at long periods is indicative of subcrustal velocity structure. Using recently published dispersion models, we invert surface wave group velocities for lithospheric structure, including lithospheric thickness, over much of the Eastern Hemisphere, encompassing Eurasia, Africa, and the Indian Ocean. Thicker lithospheres under Precambrian shields and platforms are clearly observed, not only under the large cratons (West Africa, Congo, Baltic, Russia, Siberia, India), but also under smaller blocks like the Tarim Basin and Yangtze craton. In contrast, it is found that remobilized Precambrian structures like the Saharan Shield and Sino–Korean Paraplatform do not have well-established lithospheric keels. The thinnest lithospheric thickness is found under oceanic and continental rifts, as well as along convergence zones. We compare our results to thermal models of continental lithosphere, lithospheric cooling models of oceanic lithosphere, lithosphere–asthenosphere boundary (LAB) estimates from S-wave receiver functions, and velocity variations of global tomography models. In addition to comparing results for the broad region, we examine in detail the regions of Central Africa, Siberia, and Tibet. While there are clear differences in the various estimates, overall the results are generally consistent. Inconsistencies between the estimates may be due to a variety of reasons including lateral and depth resolution differences and the comparison of what may be different lithospheric features.

Occurrence of Changshania (Trilobita, Cambrian) in the Taebaeksan Basin, Korea and its stratigraphic and paleogeographic significance

In the Cambrian the Taebaeksan Basin was a shallow marine siliciclastic–carbonate system, in which two contrasting types of lithofacies and biofacies occur in juxtaposition. The shallow marine facies (Taebaek Group) comprises diverse trilobite taxa endemic to the Sino–Korean block, whereas the deep-water oceanic facies (Yeongwol Group) is characterized by predominance of cosmopolitan and pelagic trilobites. Changshania is a representative Furongian trilobite genus endemic to the Sino–Korean block and has been employed as a zonal taxon for middle Furongian in North China. This article reports the occurrence of Changshania from the deep-water facies (Machari Formation, Yeongwol Group) of the Taebaeksan Basin, for the first time in Korea. This observation enables to correlate the Eochuangia hana Zone of Korea with the Changshania– Irvingella Zone of North China with confidence. The dominance of laminated dark gray to black shale and pandemic trilobites in the Machari Formation has been interpreted to indicate deposition in a dysaerobic deep-water environment. The occurrence of Changshania along with some endemic polymerid trilobites, though uncommon, in the deeper-water oceanic facies suggests that the Machari Formation was formed in the offshore region fringing the Sino–Korean block during the Cambrian.

Cretaceous and Cenozoic cooling history across the ultrahigh pressure Tongbai–Dabie belt, central China, from apatite fission-track thermochronology

The crystalline terrane of the Tongbai–Dabie region, central China, comprising the Earth's largest ultrahigh-pressure (UHP) exposure was formed during Triassic collision between the Sino–Korean and Yangtze cratons. New apatite fission-track (AFT) data presented here from the UHP terrane, extends over a significantly greater area than reported in previous studies, and includes the (eastern) Dabie, the Hong'an (northwestern Dabie) and Tongbai regions. The new data yield ages ranging from 44 ± 3 to 142 ± 36 Ma and mean track lengths between ∼10 and 14.4 μm. Thermal history models based on the AFT data taken together with published 40Ar/ 39Ar, K–Ar, apatite and zircon (U–Th)/He and U–Pb data, exhibit a three-stage cooling pattern that is similar across the study region, commencing with an Early Cretaceous rapid cooling event, followed by a period of relative thermal stability during which rocks remained at temperatures within the AFT partial annealing zone (∼60–110 °C) and ending with a possible renewed phase of accelerated cooling during Pliocene to Recent time. The first cooling phase followed large-scale transtensional deformation between ∼140 and 110 Ma and is related to Early Cretaceous eastward tectonic escape and Pacific back arc extension. Between this phase and the subsequent slow cooling phase, a transition period from ∼120 to 80 Ma (to ∼70 to 45 Ma along the Tan–Lu fault) was characterised by a relatively low cooling rate (∼3–5 °C/Ma). This transition is likely related to a tectonic response associated with the mid-Cretaceous subduction of the Izanagi–Pacific plate as well as lithospheric extension and thinning in eastern Asia. The present regional AFT age pattern is therefore basically controlled by the Early Cretaceous rapid cooling event, but finally shaped through active Cenozoic faulting. Following the transition phase the subsequent slow cooling phase pattern implies a net reduction in horizontal compressional stress corresponding to increased extension rates along the continental margin due to the decrease in plate convergence. Modelling of the AFT data suggests a possible Pliocene–Recent cooling episode, which may be supported by increased rates of sedimentation observed in adjacent basins. This cooling phase may be interpreted as a response to the far-field effects of the frontal India–Eurasia collision to the west. Approximate estimates suggest that the total amount of post ∼120 Ma denudation across the UHP orogen ranged from ∼2.4 to 13.2 km for different tectonic blocks and ranged from ∼0.8 to 9.7 km during the Cretaceous to between ∼1.7 and 3.8 km during the Cenozoic.

Crustal structure of the northeastern margin of the Tibetan plateau from the Songpan-Ganzi terrane to the Ordos basin

The 1000-km-long Darlag–Lanzhou–Jingbian seismic refraction profile is located in the NE margin of the Tibetan plateau. This profile crosses the northern Songpan-Ganzi terrane, the Qinling-Qilian fold system, the Haiyuan arcuate tectonic region, and the stable Ordos basin. The P-wave and S-wave velocity structure and Poisson's ratios reveal many significant characteristics in the profile. The crustal thickness increases from northeast to southwest. The average crustal thickness observed increases from 42 km in the Ordos basin to 63 km in the Songpan-Ganzi terrane. The crust becomes obviously thicker south of the Haiyuan fault and beneath the West-Qinlin Shan. The crustal velocities have significant variations along the profile. The average P-wave velocities for the crystalline crust vary between 6.3 and 6.4 km/s. Beneath the Songpan-Ganzi terrane, West-Qinling Shan, and Haiyuan arcuate tectonic region P-wave velocities of 6.3 km/s are 0.15 km/s lower than the worldwide average of 6.45 km/s. North of the Kunlun fault, with exclusion of the Haiyuan arcuate tectonic region, the average P-wave velocity is 6.4 km/s and only 0.5 km/s lower than the worldwide average. A combination of the P-wave velocity and Poisson's ratio suggests that the crust is dominantly felsic in composition with an intermediate composition at the base. A mafic lower crust is absent in the NE margin of the Tibetan plateau from the Songpan-Ganzi terrane to the Ordos basin. There are low velocity zones in the West-Qinling Shan and the Haiyuan arcuate tectonic region. The low velocity zones have low S-wave velocities and high Poisson's ratios, so it is possible these zones are due to partial melting. The crust is divided into two layers, the upper and the lower crust, with crustal thickening mainly in the lower crust as the NE Tibetan plateau is approached. The results in the study show that the thickness of the lower crust increases from 22 to 38 km as the crustal thickness increases from 42 km in the Ordos basin to 63 km in the Songpan-Ganzi terrane south of the Kunlun fault. Both the Conrad discontinuity and Moho in the West-Qinling Shan and in the Haiyuan arcuate tectonic region are laminated interfaces, implying intense tectonic activity. The arcuate faults and large earthquakes in the Haiyuan arcuate tectonic region are the result of interaction between the Tibetan plateau and the Sino–Korean and Gobi Ala Shan platforms.

Provenance of Paleozoic–Mesozoic sedimentary rocks in the Inner Zone of Southwest Japan: An evaluation based on Nd model ages

Nd model ages using depleted mantle (TDM) values for the sedimentary rocks in the Inner Zone of the SW Japan and western area of Tanakura Tectonic Line in the NE Japan allow classification into five categories: 2.6–2.45, 2.3–2.05, 1.9–1.55, 1.45–1.25, and 1.2–0.85 Ga. The provenance of each terrane/belt/district is interpreted on the basis of the TDMs, 147Sm / 144Nd vs. 143Nd / 144Nd relation, Nd isotopic evolution of the source rocks in East China and U–Pb zircon ages. The provenance of 2.6–1.8 Ga rocks, which are reported from Hida–Oki and Renge belts and Kamiaso conglomerates, is inferred to be the Sino–Korean Craton (SKC). The 2.3–1.55 Ga rocks, mostly from Ryoke, Mino and Ashio belts, are originally related with the SKC and/or Yangtze Craton (YC). The provenances of the sedimentary rocks with 1.45–0.85 Ga, from the Suo belt, Higo and some districts in the Mino and Ashio belts, are different from the SKC and YC. Especially, the Higo with 1.2–0.85 Ga is considered as a fragment of collision zone in East China. Akiyoshi belt probably belongs to the youngest age category of 1.2–0.85 Ga. Some metasedimentary rocks from the Ryoke belt have extremely high 147Sm / 144Nd and 143Nd / 144Nd ratios, whose main components are probably derived from mafic igneous rocks within the Ryoke belt itself and from the adjacent Tamba belt.

SHRIMP U–Pb zircon dating of a metagabbro and eclogites from western Dabieshan (Hong'an Block), China, and its tectonic implications

In order to better understand the collision tectonics between the Sino–Korean and Yangtze cratons, we performed ion microprobe (SHRIMP) dating on zircons of a metagabbro and four eclogites from the high-pressure/ultrahigh-pressure (HP/UHP) metamorphic terrane of western Dabieshan (also known as the Hong'an Block), China. New zircon U–Pb data of eclogites from the Huwan and Hong'an HP units suggest that their protoliths were formed during the Neoproterozoic, from 733±10 to 684±15 Ma, whereas the metamorphic ages are 229±12 Ma for an eclogite of the Huwan HP unit, and 213±5 Ma for that of the Xinxian UHP unit. The age data indicate that western Dabieshan is an integral part of the Dabie–Sulu Triassic HP/UHP metamorphic belt. A few eclogites with Carboniferous or older zircon ages reported in the literature are limited in the northwestern corner of western Dabieshan. They should not be considered as representative of the whole Huwan unit, and the geological meaning of their occurrence still remains obscure. The identical ages of eclogites from the Huwan and Hong'an units, together with their comparable P–T conditions and similar country rocks, suggest that the two units belong to the same HP slice overlying the UHP slice (=main part of the Xinxian unit). Zircons from a metagabbro in the Balifan tectonic mélange unit located to the north of the HP/UHP complexes yield a Neoproterozoic emplacement age at 582±11 Ma. Taking into account the Yangtze signature for the adjacent Nanwan flysch unit, we infer that the Balifan and Nanwan units represent the basement and cover accretionary complexes, respectively. They were sliced from the Yangtze craton during its northerly subduction. Accordingly, the northern boundary fault of the Nanwan unit should be the Triassic suture between the Sino–Korean and Yangtze cratons. The cooling ages obtained from different units suggest diachronous exhumation of the subducted slab during Triassic time, from ca. 240 Ma for the hanging wall accretionary complex to ca. 210 Ma for the footwall UHP slice. This scenario could be explained by a successive subduction of underlying slices with a nearly concomitant exhumation of overlying slices.

Geochemical, age, and isotopic constraints on the location of the Sino–Korean/Yangtze Suture and evolution of the Northern Dabie Complex, east central China

Research Article| May 01, 2004 Geochemical, age, and isotopic constraints on the location of the Sino–Korean/Yangtze Suture and evolution of the Northern Dabie Complex, east central China Derek L. Bryant; Derek L. Bryant 1Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee 37235, USA Search for other works by this author on: GSW Google Scholar John C. Ayers; John C. Ayers 1Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee 37235, USA Search for other works by this author on: GSW Google Scholar Shan Gao; Shan Gao 2Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China, and Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xi'an 710069, China Search for other works by this author on: GSW Google Scholar Calvin F. Miller; Calvin F. Miller 3Department of Earth and Environmental Sciences, Vanderbilt University, Nashville, Tennessee 37235, USA Search for other works by this author on: GSW Google Scholar Hongfei Zhang Hongfei Zhang 4Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China Search for other works by this author on: GSW Google Scholar GSA Bulletin (2004) 116 (5-6): 698–717. https://doi.org/10.1130/B25302.2 Article history received: 19 May 2003 rev-recd: 15 Sep 2003 accepted: 22 Sep 2003 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Derek L. Bryant, John C. Ayers, Shan Gao, Calvin F. Miller, Hongfei Zhang; Geochemical, age, and isotopic constraints on the location of the Sino–Korean/Yangtze Suture and evolution of the Northern Dabie Complex, east central China. GSA Bulletin 2004;; 116 (5-6): 698–717. doi: https://doi.org/10.1130/B25302.2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The Northern Dabie Complex in east central China lies between the Sino–Korean plate to the north and the Yangtze plate to the south. The Northern Dabie Complex has been variously proposed to represent a Paleozoic magmatic arc on the Sino–Korean plate, an exhumed piece of subducted Yangtze plate crust, or crust produced almost entirely by Cretaceous extension-related magmatism. Trace element compositions of Northern Dabie Complex orthogneisses and granites show arc signatures similar to those of ultra-high-pressure rocks in the central Dabie, but no mineralogical evidence of ultra-high-pressure metamorphism is pres ent in the samples investigated here. Field relationships, textures, major and trace element compositions, and ion microprobe U-Pb zircon protolith crystallization ages reveal three distinct types of gneiss: diorite gneiss xenoliths (770 ± 26 Ma, 95% confidence limit), those within first-genation highly deformed migmatitic grey gneisses (747 ± 14 Ma), and those cross-cut by second- generation Cretaceous weakly foliated felsic gneisses (127 ± 4 Ma). Unfoliated Cretaceous granites (117 ± 11 Ma, monazite Th-Pb age = 117 ± 1 Ma) intrude second- generation gneisses. Cretaceous second- generation gneisses and granites yield zircon inheritance ages of ca. 2 Ga, 700–800 Ma, and (rarely) 227–271 Ma, indicating that the Northern Dabie Complex is not simply a Cretaceous extensional terrane. The 700–800 Ma zircon ages are similar to those of granitic gneisses from the central ultra-high- pressure zone (698 ± 47 Ma) and are characteristic of the Yangtze craton. εNd values suggest that Cretaceous rocks in the Northern Dabie Complex formed by partial melting of basement with very low εNd and not by melting of first-generation or diorite gneisses. Nd-depleted mantle model ages are consistent with the time of formation of the Yangtze craton at 1.4–2.5 Ga. The Northern Dabie Complex is interpreted to be an extension of the Yangtze craton that was unaffected by ultra-high-pressure metamorphism. The Sino–Korean/Yangtze suture must lie to the north of the Northern Dabie Complex. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.