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Detrital zircon geochronology and provenance of sediments within the Mesozoic basins:New insights into tectonic evolution of the qinling orogen

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Geoscience Frontiers 2021年第3期12卷 343-357页

作者： Anqi Wang Debin Yang Haotian Yang Maosong Mu Yikang Quan Leran Hao Wenliang Xu College of Earth Sciences Jilin UniversityChangchun 130061China Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Natural ResourcesChangchun 130061China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

Mesozoic sedimentary units within the Nanzhao and Mashiping basins record the paleogeographic and tectonic evolution of the qinling orogen(QO).This study uses new detrital zircon U-Pb ages and Hf isotopic data to constrain the timing of deposition and provenance of the Taishanmiao,Taizishan,Nanzhao,and Mashiping formations of the North qinling orogen(NQO).The detrital zircons can be split by age peaks into five major groups,including Early Cretaceous,Late Triassic,Early Paleozoic,Neoproterozoic and Paleoproterozoic age *** the basis of the youngest zircon ages and age-diagnostic fossils,we conclude that the Taishanmiao(youngest age of 234 Ma)and Taizishan(216 Ma)formations were deposited during the Late Triassic,whereas the Nanzhao Formation(110 Ma)was deposited during the Early Cretaceous rather than the Late Jurassic as previously *** Mashiping Formation(110 Ma)was also deposited during the Early *** with zircon Hf isotopic compositions,zircons from Late Triassic units were generally derived from the NQO,South qinling orogen(SQO),and North China Craton(NCC),with minor amounts derived from the Xing-Meng orogenic *** sediments within the Nanzhao Formation were mainly derived from the QO,with a minor contribution from the *** Early Cretaceous conglomerates of the Mashiping Formation were generally derived from recycled earlier *** implies that Late Triassic deposition was related to the final closure of the Mianlue Ocean,whereas Early Cretaceous deposition was correlated to the continued intercontinental subduction of the Yangtze Craton beneath the *** change in provenance within these Mesozoic sediments suggests the QO underwent two periods of significant uplift,which was a process generated sediments that were deposited in a series of basins of this area.

关键词： Detrital zircons U-Pb dating Hf isotopes Mesozoic qinling orogen

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Timing of carbonatite-hosted U-polymetallic mineralization in the supergiant Huayangchuan deposit,qinling orogen:Constraints from titanite U-Pb and molybdenite Re-Os dating

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Geoscience Frontiers 2020年第5期11卷 1581-1592页

作者： Hui Zheng Huayong Chen Dengfeng Li Chao Wu Xi Chen Chun-kit Lai Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China School of Marine Sciences Sun Yat-sen UniversityGuangzhou 510006China School of Earth Science and Technology Southwest Petroleum UniversityChengdu 610000China Faculty of Science Universiti Brunei DarussalamGadongBE1410Brunei Darussalam

The newly-discovered supergiant Huayangchuan uranium(U)-polymetallic(Sr,Se,REEs,Ba,Nb and Pb)deposit is located in the qinling orogen,central *** deposit underwent multistage mineralization,with the main carbonatite ore stage being the most important for the U,Nb,REE,Sr and Ba *** to the mineral assemblages,the main carbonatite ore stage can be divided into three substages,i.e.,sulfate(Ba-Sr),alkali-rich U and REE-U ***-stage titanite from the Huayangchuan igneous carbonatite are rich in high field strength elements(HFSEs,e.g.,Zr,Nb and REEs),and show clear elemental substitutions(e.g.,Ti ***+Fe+Al and Ca+Ti ***+Al+REE).High-precision LA-ICP-MS titanite dating yielded a U-Pb age of 209.0±2.9 Ma,which represents the mainstage mineralization age at Huayangchuan,and is coeval with the local carbonatite dyke *** mineralization age is further constrained by the Re-Os dating of molybdenite from the Huayangchuan carbonatite,which yielded a weighted mean age of 196.8±2.4 *** Re contents(337.55-392.75 ppm)and C-OSr-Nd-Pb isotopic evidence of the Huayangchuan carbonatite both suggest a mantle origin for the *** study supports that the Late Triassic carbonatite magmatism was responsible for the world-class U-Mo-REE mineralization in the qinling orogen,and that the regional magmatism and ore formation was likely caused by the closure of the Mianlue ocean and the subsequent North China-South China continent-continent collision.

关键词： Carbonatite-hosted U-Polymetallic deposits Titanite U–Pb dating Molybdenite Re–Os dating Huayangchuan deposit qinling orogen

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Multiple-Stage Mineralization in the Huayangchuan U-REE-Mo-Cu-Fe Ore Belt of the qinling orogen,Central China:Geological and Re-Os Geochronological Constraints

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Journal of Earth Science 2022年第1期33卷 193-204页

作者： Hongjun Jiang Chunsi Yang Dequan Wang Hui Zheng Jie Li Huayong Chen Key Laboratory of Mineralogy and Metallogeny Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China CAS Center for Excellence in Deep Earth Science Guangzhou 510640China University of Chinese Academy of Sciences Beijing 100049China Guangdong Provincial Key Laboratory of Mineral Physics and Materials Guangzhou 510640China State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Geological Party No.214 Sino Shaanxi Nuclear Industry GroupXi'an 710100China Sino Shaanxi Nuclear Industry Group Xi'an 710100China

The Huayangchuan ore belt is located in the western segment of Xiaoqinling orogen in the southern margin of the North China Craton(NCC),and hosts voluminous magmatism and significant U-REE-Mo-Cu-Fe polymetallic ***,geochronological framework of the various mineralization phases in this region is poorly ***,we present new Re-Os isochron ages on magnetite from the Caotan Fe deposit(2 675 ± 410 Ma,MSWD = 0.55),and on pyrite from the Jialu REE deposit(2 127 ± 280 Ma,MSWD = 1.9) and Yuejiawa Cu deposit(418 ± 23 Ma,MSWD =11.5),and Re-Os weighted average model age on pyrite from the Taoyuan Mo-U deposit(235 ± 14 Ma,MSWD = 0.17).These ages,combined with regional geology and mineralization ages from other deposits,suggest that mineralization in the Huayangchuan ore belt lasted from the Neoarchean to the Late *** mineralization corresponds to regional tectono-magmatic events,including the Neoarchean alkali magmatism(REE mineralization),Paleoproterozoic plagioclase-amphibolite emplacement(Fe mineralization),Paleoproterozoic pegmatite magmatism(U mineralization),Paleozoic Shangdan oceanic slab subduction-related arc magmatism(Cu mineralization),Early Mesozoic Paleo-Tethys Ocean subduction-related arc magmatism(Mo-U mineralization),and Late Mesozoic Paleo-Pacific oceanic plate subduction direction change-related Mo(-Pb) *** proposed that the Huayangchuan ore belt has undergone prolonged metallogenic evolution,and the magmatism and associated mineralization were controlled by regional geodynamic events.

关键词： Re-Os dating U-REE-Mo-Cu-Fe mineralization Huayangchuan ore belt extra-long metallogenic history qinling orogen geochemistry

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Distribution Characteristics and Metallogenic Regularity of Graphite Deposits in qinling orogen,China

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Acta Geologica Sinica(English Edition) 2015年第4期89卷 1244-1263页

作者： FENG Yangwei QU Hongjun YANG Chenyi LV Lushi State Key Laboratory of Continental Dynamics Department of GeologyNorthwest University Xi'an Institute of Geology and Mineral Resources Xi'an Center of Geological Survey China Geological Survey Key Laboratory for the Study of Focused Magmatism and Giant Ore Deposits MLR Shaanxi Earthquake Administration Aerophotogrammetrical Surveying and Remote Sensing Bureau CNACG

qinling orogen is one of the five main repository distribution provinces of large scale graphite resources. Graphite occurrence strata are multitudinous including NeoArchaean group to Neopaleozoic. Mineral deposit types are complete consisting of crystal flaky graphite deposit and aphanitic graphite deposit, ore types of the former are main graphite gneiss, graphite schist and graphitized marble, and ore types of the latter are main graphite layer metamorphosised from coal bed and graphitic carbargilite. At present, most graphite deposits with low research degree only implement preliminary investigations of the graphite resource, which has a good prospect. Based on the basic material of dozens of graphite deposits, spots and plays discovered in the qinling orogen, this paper applied geologic multidisciplinary analysis method to disclose the graphite deposit types of the qinling orogen, mainly through outdoors geologic survey and specimen examination with analysis of some typical deposits： regional metamorphism crystal graphite deposits and thermo-contact metamorphic aphanitic graphite deposits, with the control of latitudinally trending regional tectonic, graphite deposits of the qinling orogen distribute sublatitudinally trending three large ore belts： I the Neoarchean-Proterozoic basement crystal graphite enrichment deposits zone along the south margin of North China plate; II the Carboniferous intermountain basin group aphanitic graphite enrichment deposits zone near the Shangdan suture of the West qinling; III Paleozoic crystal graphite enrichment deposits zone in the qinling paleomicroplate of the west part of the East *** are reached from multiple inquiries： qinling multi-cycle complex continental collision orogen zone has experienced multiple tectonic framework transformation and polyphase tectonic thermal event from NeoArchean Erathem adjointing multiple graphite tectonic mineralization cycle. In the light of chief control of mineralization a

关键词： qinling orogen graphite deposits graphite gneiss Metallogenic regularity

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Extreme variation of sulfur isotopic compositions in pyrite from the Qiuling sediment-hosted gold deposit,West qinling orogen,central China:an in situ SIMS study with implications for the source of sulfur

Extreme variation of sulfur isotopic compositions in pyrite ...

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中国科学院地质与地球物理研究所2015年度（第15届）学术年会

作者： Lei Chen Xian-hua Li Jian-wei Li Albert H.Hofstra Yu Liu Alan E.Koenig State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences U.S.Geological Survey

High spatial resolution textural(scanning electron microscope(SEM)),chemical(electron microprobe(EMP))and laser ablation-inductively coupled plasma-mass spectrometry(LA-ICP-MS)),and sulfur isotopic(secondary ion mass spectrometry(SIMS))analyses of pyrite from the Qiuling sediment-hosted gold deposit(232±4 Ma)in the West qinling orogen,central China were conducted to distinguish pyrite types and gain insights into the source and evolution of sulfur in hydrothermal *** results reveal an enormous variation(-27.1 to+69.6‰)in sulfur isotopic composition of pyrite deposited during three paragenetic ***-ore framboidal pyrite,which is characterized by low concentrations of As,Au,Cu,Co,and Ni,has negativeδS values of-27.1 to-7.6‰that are interpreted in terms of bacterial reduction of marine sulfate during sedimentation and diagenesis of the Paleozoic carbonate and clastic sequences,the predominant lithologies in the deposit area,and the most important hosts of many sediment-hosted gold deposits throughout the West qinling *** ore-stage hydrothermal pyrite contains high concentrations of Au,As,Cu,Sb,Tl,and Bi and hasa relatively narrow range of positiveδS values ranging from+8.1 to+15.2‰.The sulfur isotope data are comparable to those of ore pyrite from many Triassic orogenic gold deposits and Paleozoic sedimentary exhalative(SEDEX)Pb-Zn deposits in the West qinling orogen,both being hosted mainly in the Devonian *** similarity indicates that sulfur,responsible for the auriferous pyrite at Qiuling,was largely derived from the metamorphic devolatization of Paleozoic marine sedimentary ***-ore-stage pyrite,which is significantly enriched in Co and Ni but depleted in Au and As,has unusually highδS values ranging from+37.4 to+69.6‰,that are interpreted to result from thermochemical reduction of evaporite sulfates in underlying Cambrian sedimentary rocks with very highδS *** variations in Au content and sulfur isotopic compositions acro

关键词： Pyrite SIMS Sulfur isotopes Sediment-hosted gold deposit qinling orogen

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PROVENANCE AND TECTONIC SETTING OF CLASTIC DEPOSITS IN THE DEVONIAN XICHENG BASIN,qinling orogen,CENTRAL CHINA

PROVENANCE AND TECTONIC SETTING OF CLASTIC DEPOSITS IN THE D...

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中国科学院地质与地球物理研究所2006学术年会

作者： ZHEN YAN~1,ZONGQI WANG~2,TAO WANG~2,QUANREN YAN~2,WENJIAO XIAO~1,AND JILIANG LI~1 1 State Key Laboratorj’ of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China 2 Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China

The qinling orogenic belt is one of world’s great collisional orogenic belts,which extends from the Pamirs-West Kunlun to the Korean peninsula and occupies a key position in understanding of the evolution and assembly of *** belt separates the North China and South China ***,thick Devonian clastic rocks,sandwiched between the Shangdan and Mianlue suture zones,are mainly infills of the Xicheng Basin and provide the principal sedimentary record of tectonism in the qinling *** infills were subdivided into three subunits:the Upper Devonian Dacaotan Group,the Middle-Upper Devonian Shujiaba Group,and the Lower-Upper Devonian Xihanshui *** provenance and tectonic setting are critical to understanding not only the tectonic evolution of Asia but also the global aspects of collisional *** with Devonian strata in the eastern part of the qinling orogen,the Xicheng Basin was not seriously modified by Mesozoic tectonism. Petrologic studies demonstrate that the Dacaotan Group consists mainly of feldspathic litharenite with abundant volcanic *** contrast,the Shujiaba and Xihanshui Groups contain more metamorphic and sedimentary fragments and fewer magmatics than other lithic fragments;these relations demonstrate that magmatic plutons were not extensively exposed at the time of deposition of these *** Q-F-L plots sandstones fall into the field of transitional arcs,but on *** Lm-Lv-Ls diagrams they plot in the fields of continental-arc and continental-suture *** presence of volcanic lithic grains in the sandstones suggests they were derived mainly from a continental arc. Major-element geochemistry of siltstones and mudstones demonstrate that most were derived from a continental arc,but some from an oceanic island ***-element geochemistry favors a continental-arc provenance mostly from felsic rocks.A high Cr content of siltstones and mudstones demonstrates that some mafic or ultramafic rocks were exp

关键词： clastic deposits Devonian Xicheng basin qinling orogen

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Devonian Sedimentary Environments and Provenance of the qinling orogen:Constraints on Late Paleozoic Southward Accretionary Tectonics of the North China Craton

Devonian Sedimentary Environments and Provenance of the Qinl...

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中国科学院地质与地球物理研究所2006学术年会

作者： ZHEN YAN~1, Institute of Geology and Geophysics,Chinese Academy of Sciences,P.O.Box 9825,Beijing 100029,China ZONGQI WANG,QUANREN YAN,TAO WANG, Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China WENJIAO XIAO,JILIANG LI, State Key Laboratory of Lithosphere Tectonic Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences, P.O.Box 9825,Beijing 100029,China FANGLIN HAN,JUNLU CHEN,AND YONGCHENG YANG Shaanxi Insititute of Geology Survey,Xianyang 712000,Shaanxi,China

The qinling orogen of central China occupies a key position in East Asia,and is of fundamental importance in unraveling its tectonic *** sedimentary basins are located between the North qinling arc and the Baishuijiang Devonian-Permian accretionary *** indictors and petrological and geochemical analyses show that turbiditic and coastal sandstones and pyroclasts developed in *** of conglomerates and associated turbiditic and pyroclastic rocks evidently was related to the development of the North qinling orogen rather than the South China *** in the conglomerates were derived predominantly from the North qinling and partly from its basement. Northward Devonian subduction and subsequent uplift caused successive forearc depocenters and associated facies belts to migrate southwards synchronously with *** and transtensional faults segmented the basins into discrete half-graben *** analysis adjacent to thrust faults demonstrates that thrust sheets crests were truncated by erosion and provided detritus for ***-marine and turbiditic depositional systems evolved in complex patterns to produce varied facies frameworks associated with complex subduction *** facts,together with other geological and geochemical data,demonstrate that the North China craton grew southwards by arc-accretion processes from the end of the early Paleozoic to the beginning of the late Paleozoic,long before the integration of the North China and Yangtze cratons.

关键词： Devonian qinling orogen Accretionary Tectonics

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Metamorphic evolution of the Wuguan complex and Liuling Group:Implications for the late Paleozoic tectonic evolution of the qinling orogen

Metamorphic evolution of the Wuguan complex and Liuling Grou...

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2018年中国地球科学联合学术年会

作者： Longyao Chen Xiaochun Liu Wei Qu Juan Hu Institute of Geomechanics Chinese Academy of Geological Sciences

The late Paleozoic tectonic evolution of the qinling orogen still remains poorly *** Wuguan complex and Liuling Group represent the late late Paleozoic tectonic belt of the qinling *** this paper,we report the metamorphic P-T evolution and 40 Ar/39 Ar mineral ages from garnet amphibolites and metapelites in the Wuguan complex and Liuling Group and discuss their tectonic *** on textural observations and mineral compositions,the Wuguan complex and Liuling Group are interpreted to experience two metamorphic events,especially the garnets in the garnet amphibolites and metapelites with obvious two-stage *** equilibria modeling and conventional geothermobarometries indicate that the first metamorphic event has the peak P-T conditions of ～710 °C and 9.0 kbar with a clockwise hairpin-type P-T path,whereas the second metamorphic conditions are at 563–609 °C and 7.3–8.3 *** from garnet amphibolite and meta-andestie yield 40 Ar/39 Ar ages of 306 – 301 ***,muscovites from metapelites give 40 Ar/39 Ar ages of 263–249 *** the ages of metamorphic zircon from garnet amphibolite in the Wuguan complex,together with two groups of metamorphic ages in the Guishan complex and Xiongdian eclogite belt,we propose that the first metamorphism in the Wuguan complex and Liuling Group may be generated in the hangingwall of the subduction zone,which was likely related to the Carboniferous oceanic crustal *** second metamorphism was possibly resulted from the imbrication of different tectonic slabs during the late Permian " soft collision " process in the qinling orogen between the Sino-Korean and Yangtze craton.

关键词： Metamorphic evolution 40Ar/39Ar geochronology Wuguan complex Liuling Group late Paleozoic tectonic evolution qinling orogen

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Re-Os and U-Pb Geochronology of the Erlihe Pb-Zn Deposit,qinling orogenic Belt,Central China,and Constraints on Its Deposit Genesis

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Acta Geologica Sinica(English Edition) 2011年第3期85卷 673-682页

作者： ZHANG Fan LIU Shuwen LI Qiugen SUN Yali WANG Zongqi YAN Quanren YAN Zhen Key Laboratory of orogenic Belt and Crustal Evolution Ministry of Education Peking University Beo＇ing 100871 China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Institute of Mineral Resources Chinese Academy of Geological Sciences Beo＇ing 10003 7 China Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China

The Erlihe Pb-Zn deposit is an important mine of the Pb-Zn metallogenic zone in the South qinling *** has been considered a sedimentary exhalative deposit in previous investigations because the ore body occurs concordantly at the transitional location of an upright *** and Os isotopic analyses for paragenetic pyrites with sphalerite and galena from the ore body have been used to determine the timing of mineralization and to trace the source of metallogenic *** Re-Os isotopic data of four pyrite samples construct an isochron,yielding a weighted average age of 226±17 Ma（mean square weighted deviation=1.7）,which is considered the main mineralization age.A dioritic porphyrite vein sample,showing weaker mineralization,was also dated using the SHRIMP zircon UPb isotopic method to constrain the youngest metallogenic age of the ore deposit,because it distributes along a group of tensional joints cutting not only the upright fold in the deposit field,but also the main ore *** dioritic porphyrite sample yields a weighted mean ^（206）Pb/^（238）U age of 221±3 Ma,which is slightly younger than the Re-Os isotopic isochron age of the pyrites,considered as the upper age limit of the mineralization,namely the ending age of the *** Os isotopic compositions of sulfide minerals distribute within a range between Os isotopic compositions of the crust and the mantle, indicating that the ore deposit can be derived from magma-related fluid,and the metallogenic materials are most likely derived from the mixing source of the crust and the *** Erlihe Pb-Zn deposit and associated dioritic porphyrite vein,important records of qinling tectonic-magmatism-mineralization activities,were formed during the Triassic collisional orogeny processes.

关键词： Erlihe Pb-Zn deposit Re-Os isotopic system dioritic porphyrite vein SHRIMP zircon UPb age qinling orogen

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Reworking of the Juvenile Crust in the Late Mesozoic in North qinling,Central China

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Journal of Earth Science 2022年第3期33卷 623-641页

作者： Ying-Yu Xue Haiyang Liu Zhiyi Wang Weidong Sun Fukun Chen Center of Deep Sea Research Institute of OceanologyChinese Academy of SciencesQingdao 266071China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China School of Earth and Space Sciences University of Science and Technology of ChinaHefei 230026China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China University of Chinese Academy of Sciences Beijing 100049China

The qinling orogen resulted from the collision between the North and South China blocks in the *** granitoids,ranging from the Triassic to the Cretaceous,are widely distributed in this orogen,and they provide excellent clues for understanding the crustal evolution and geodynamic evolution of the orogenic *** Triassic belt is mostly located in the South qinling,whereas the Cretaceous belt is located mostly in the North *** Taibai complex pluton is located at the conjunction of the two *** we present a data set comprising zircon U-Pb dating and elemental and Sr-Nd isotopic geochemistry for Late Mesozoic granite and microgranular enclaves(MME)exposed in the Taibai complex *** granite and MME yield concordant U-Pb zircon ages of 124 to 118 Ma,indicating that they were products of roughly simultaneous magmatism in the Late *** granite rocks are high-K,calc-alkaline,and weakly peraluminous in compositions,and they are characterized by enrichment in large ion lithophile elements(e.g.,Rb,Ba),depletion in high field strength elements(e.g.,Nb,Ta,Zr,Ti),and variable Sr/Y ratios of 7.64 to *** MgO,Cr,and Ni contents imply that the magma(s)were essentially *** the granite and the MME show relative depletion in Sr-Nd isotopic composition(initial ^(87)Sr/^(86)Sr of 0.7044 to 0.7067,initialε_(Nd) values of-3.4 to-2.6),suggesting that the magma(s)originated from juvenile crustal *** Sr-Nd isotopic characteristics are significantly different from those of other Late Mesozoic granitoids exposed elsewhere in the qinling orogenic belt,which formed from much older and enriched sources and with negligible contributions from mantle or juvenile *** propose a reworking event of the juvenile crust during the Late Mesozoic that was triggered by the tectonic extension and subsequent asthenospheric upwelling that occurred in eastern China.

关键词： qinling orogen Mesozoic granite crustal reworking Nd isotope geochemistry

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