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| 1 | Geochronology and significance of volcanic rocks in the Ning-Wu Basin of China显示文摘The Ning-Wu(Nanjing-Wuhu) Basin is one of the most important volcanic basins in the Middle-Lower Yangtze River Valley,eastern China.It consists of four volcanic units,i.e.,the Longwangshan,Dawangshan,Gushan,and Niangniangshan Formations.Their LA-ICP MS U-Pb zircon ages are 134.8±1.8,132.2±1.6,129.5±0.8,and 126.8±0.6 Ma,respectively.Results of this study indicate that all volcanic rocks in the Ning-Wu Basin were formed in the Early Cretaceous from 135 to 127 Ma,lasting 8-10 m.y.No Jurassic volcanic activities occurred in any of the volcanic basins of the Middle-Lower Yangtze River Valley,including the Ning-Wu Basin.These new chronological results provide significant evidence for further study of this region to improve our understanding of Mesozoic tectonic,magmatic,and metallogenic processes of eastern China. | ZHOU TaoFa FAN Yu YUAN Feng ZHANG LeJun QIAN Bin MA Liang YANG XiFei David R COOKE | 2011 | Science China Earth Sciences2011，54，2： | 33 |
| 2 | SHRIMP U-Pb Zircon Age of the Ka'erjiao Intrusion in the Sawur Region in West Junggar,Xinjiang显示文摘摘要:酸侵入在 Sawur 区域是普遍的, Xinjiang。Ka'erjiao 侵入主要由钠长石花岗石斑岩, K 长石花岗石斑岩, ivernite 和花岗石斑岩组成。在 Sawur 区域是在岩浆侵入和爆发之间的一个过渡产品, Ka'erjiao 侵入在未期被形成对开始晚含碳作为早二叠由标明日期的 SHRIMP U-Pb 锆石决定了,与 302.6 | ZHOU Taofa TAN Lugui FAN Yu YUAN Feng YANG Wenping HE Lixin YUE Shucang | 2007 | Acta Geologica Sinica(English Edition)2007，81，2： | 9 |
| 3 | Basement Characteristics and Crustal Evolution of the Copper-Gold Metallogenic Belt in the Middle and Lower Reaches of the Yangtze River:Some Isotope Constraints显示文摘Studies of the Pb, Sr and Nd isotopic composition of Mesozoic intrusive rocks indicate that the basement of the copper-gold metallogenic belt of the middle and lower reaches of the Yangtze River has 'two-layer structure' and partly has 'multi-layered structure', and is inhomogeneous and shows the distinct feature of E-W provincialism. The calculated model lead ages (t1) are mostly greater than 2600 Ma, and the model neodymium ages (TDM) vary from 953 to 2276 Ma and concentrate in two time intervals: 1800-2000 Ma and 1200-1600 Ma. It is concluded that the basement of the MBYR is composed of the Late Archaeozoic to Middle Proterozoic metamorphic series and that the crust was initiated in the Archaean and continued to grow in the Early and Middle Proterozoic, and the proportion of new crust formed by mantle differentiation during the Late Proterozoic is low. | ZHOU Taofa YUE Shucang | 2000 | Acta Geologica Sinica(English Edition)2000，74，2： | 5 |
| 4 | Geochemical characteristics and tectonic setting of the Tuerkubantao mafic-ultramafic intrusion in West Junggar,Xinjiang,China显示文摘Mineral chemistry,whole-rock major oxide,and trace element compositions have been determined for the Tuerkubantao mafic-ultramafic intrusion,in order to understand the early Paleozoic tectonic evolution of the West Junggar orogenic belt at the southern margin of the Central Asian orogenic belt.The Tuerkubantao mafic-ultramafic intrusion is a well-differentiated complex comprising peridotite,olivine pyroxenite,gabbro,and diorite.The ultramafic rocks are mostly seen in the central part of the intrusion and surrounded by mafic rocks.The Tuerkubantao intrusive rocks are characterized by enrichment of large ion lithophile elements and depleted high field strength elements relative to N-MORB.In addition,the Tuerkubantao intrusion displays relatively low Th/U and Nb/U(1.13—2.98 and 2.53—7.02,respectively) and high La/Nb and Ba/Nb(1.15—4.19 and 37.7—79.82,respectively).These features indicate that the primary magma of the intrusion was derived from partial melting of a previously metasomatized mantle source in a subduction setting.The trace element patterns of peridotites,gabbros,and diorite in the Tuerkubantao intrusion have sub-parallel trends,suggesting that the different rock types are related to each other by differentiation of the same primary magma.The intrusive contact between peridotite and gabbro clearly suggest that the Tuerkubantao is not a fragment of an ophiolite.However,the Tuerkubantao intrusion displays many similarities with Alaskan-type mafic-ultramafic intrusions along major sutures of Phanerozoic orogenic belts.Common features include their geodynamic setting,internal lithological zoning,and geochemistry.The striking similarities indicate that the middle Devonian Tuerkubantao intrusion likely formed in a subduction-related setting similar to that of the Alaskan-type intrusions.In combination with the Devonian magmatism and porphyry mineralization,we propose that subduction of the oceanic slab has widely existed in the expansive oceans during the Devonian around the Junggar block. | Yufeng Deng Feng Yuan Taofa Zhou Chao Xu Dayu Zhang Xuji Guo | 2015 | Geoscience Frontiers2015，6，2： | 4 |
| 5 | Molybdenite Re–Os and albite 40 Ar/ 39 Ar dating of Cu–Au–Mo and magnetite porphyry systems in the Yangtze River valley and metallogenic implications显示文摘 | Jingwen Mao Yitian Wang Bernd Lehmann Jinjie Yu Andao Du Yanxiong Mei Yongfeng Li Wenshuan Zang Holly J. Stein Taofa Zhou | 2005 | Ore Geology Reviews2005，，3： | 2 |
| 6 | Geological, geochemical characteristics and isotope systematics of the Longqiao iron deposit in the Lu Zong volcano-sedimentary basin, Middle- Lower Yanglze (Changjiang) River Valley, Eastern China显示文摘 | Zhou Taofa Wu Mingan Fan Yu | 2011 | ()re Geology Review2011，43，1： | 1 |
| 7 | Geochemistry and evolution of ore-forming fluids of the Yueshan Cu-Au skam- and vein-type deposits, Anhui Province, South China 显示文摘 | Zhou Taofa Yuan Feng Yue Shucang LiuXiaodong Zhang Xin Fan Yu | 2007 | Ore Geol Rev2007，31，14： | 1 |
| 8 | Os-Os Dating Of Copper And Molybdenum Deposits Along The Middle And Lower Reaches of The Yangtze River,China显示文摘 | Sun Weidong Xie Zhi Chen Jiangfeng Zhang Xun Chai Zifang Du Andao Zhao Junshen Zhang henghuo Zhou Taofa | 2003 | Economic Geology2003，98，： | 1 |
| 9 | Molybdenite Re–Os and albite 40 Ar/ 39 Ar dating of Cu–Au–Mo and magnetite porphyry systems in the Yangtze River valley and metallogenic implications显示文摘 | Jingwen Mao Yitian Wang Bernd Lehmann Jinjie Yu Andao Du Yanxiong Mei Yongfeng Li Wenshuan Zang Holly J. Stein Taofa Zhou | 2005 | Ore Geology Reviews2005，，3： | 1 |
| 10 | Molybdenite Re-Os,titanite and garnet U-Pb dating of the Magushan skarn Cu-Mo deposit,Xuancheng district,Middle-Lower Yangtze River Metallogenic Belt显示文摘The Magushan skarn Cu-Mo deposit is a representative example of the skarn mineralization occurring within the Xuancheng ore district of the Middle-Lower Yangtze River Metallogenic Belt of eastern China.The precise age of an ore deposit is important for understanding the timing of mineralization relative to other geological events in a region and to fully place the formation of a mineral deposit within the geological context of other processes that occur within the study area.Here,we present new molybdenite Re-Os and titanite and andradite garnet U-Pb ages for the Magushan deposit and use these data to outline possible approaches for identifying genetic relationships in geologically complex areas.The spatial and paragenetic relationships between the intrusions,alteration,and mineralization within the study area indicates that the formation of the Magushan deposit is genetically associated with the porphyritic granodiorite.However,this is not always the case,as some areas contain complexly zoned plutons with multiple phases of intrusion or mineralization may be distal from or may not have any clear spatial relationship to a pluton.This means that it may not be possible to determine whether the mineralization formed as a result of single or multiple magmatic/hydrothermal events.As such,the approaches presented in this study provide an approach that allows the identification of any geochronological relationships between mineralization and intrusive events in areas more complex than the study area.Previously published zircon U-Pb data for the mineralization-related porphyritic granodiorite in this area yielded an age of 134.2±1.2 Ma(MSWD=1.4)whereas the Re-Os dating of molybdenite from the study area yielded an isochron age of 137.7±2.5 Ma(MSWD=0.43).The timing of the mineralizing event in the study area was further examined by the dating of magmatic accessory titanite and skarn-related andradite garnet,yielding U-Pb ages of 136.3±2.5 Ma(MSWD=3.2)and 135.9±2.7 Ma(MSWD=2.5),respectively.The dating of magmatic and hydrothermal activity within the Magushan area yields ages around 136 Ma,strongly suggesting that the mineralization in this area formed as a result of the emplacement of the intrusion.The dates presented in this study also provide the first indication of the timing of mineralization within the Xuancheng district.providing evidence of a close genetic relationship between the formation of the mineralization within the Xuancheng district and the Early Cretaceous magmatism that occurred in this area.This in turn suggests that other Early Cretaceous intrusive rocks within this region are likely to be associated with mineralization and should be considered highly prospective for future mineral exploration.This study also indicates that the dating of garnet and titanite can also provide reliable geochronological data and evidence of the timing of mineralization and magmatism,respectively,in areas lacking other dateable minerals(e.g.,molybdenite)or where the relationship between mineralization and magmatism is unclear,for example in areas with multiple stages of magmatism,with complexly zoned plutons,and with distal skarn mineralization. | Yue Li Feng Yuan Simon M.Jowitt Fangyue Wang Xiangling Li Yufeng Deng Yunyue Wang Taofa Zhou | 2021 | Geoscience Frontiers2021，12，3： | 1 |
| 11 | Geochemistry and evolution of ore-forming fluids of the Yueshan Cu-Au skarn- and vein-type deposits, Anhui Province, South China 显示文摘 | Zhou Taofa Yuan Feng Yue Shucang | 2007 | Ore Geology Reviews2007，31，： | 1 |
| 12 | Geo- chemistry and evolution of ore-forming fluids of the Yueshan Cu-Au skam- and vein-type deposits, Anhui Province, South China显示文摘 | ZHOU Taofa YUAN Feng YUE Shucang 2007 | 2007 | Ore Geology Reviews2007，31，1： | 1 |
| 13 | Three-dimensional P-wave Velocity Structure Modelling of the Middle and Lower Reaches of the Yangtze River Metallogenic Belt: Crustal Architecture and Metallogenic Implications显示文摘In this study,we compiled and analyzed 69310 P-wave travel-time data from 6639 earthquake events.These events(M≥2.0)occurred from 1980 s to June 2019 and were recorded at 319 seismic stations(Chinese Earthquake Networks Center)in the study area.We adopted the double-difference seismic tomographic method(tomo DD)to invert the 3-D P-wave velocity structure and constrain the crust-upper mantle architecture of the Middle and Lower Reaches of the Yangtze River Metallogenic Belt(MLYB).A 1-D initial model extracted from wide-angle seismic profiles was used in the seismic tomography,which greatly reduced the inversion residual.Our results indicate that reliable velocity structure of th e uppermost mantle can be obtained when Pn is involved in the tomography.Our results show that:(1)the pattern of the uppermost mantle velocity structure corresponds well with the geological partitioning:a nearly E-W-trending low-velocity zone is present beneath the Dabie Orogen,in contrast to the mainly NE-trending low-velocity anomalies beneath the Jiangnan Orogen.They suggest the presence of thickened lower crust beneath the orogens in the study area.In contrast,the Yangtze and Cathaysia blocks are characterized by relatively high-velocity anomalies;(2)both the ultra-high-pressure(UHP)metamorphic rocks in the Dabie Orogen and the low-pressure metamorphic rocks in the Zhangbaling dome are characterized by high-velocity anomalies.The upper crust in the Dabie Orogen is characterized by a low-velocity belt,sandwiched between two high velocity zones in a horizontal direction,with discontinuous low-velocity layers in the middle crust.The keel of the Dabie Orogen is mainly preserved beneath its northern section.We infer that the lower crustal delamination may have mainly occurred in the southern Dabie Orogen,which caused the mantle upwelling responsible for the formation of the granitic magmas emplaced in the middle crust as the low-velocity layers observed there.Continuous deep-level compression likely squeezed the granitic magma upward to intrude the upper crustal UHP metamorphic rocks,forming the'sandwich'velocity structure there;(3)high-velocity updoming is widespread in the crust-mantle transition zone beneath the MLYB.From the Anqing-Guichi ore field northeastward to the Luzong,Tongling,Ningwu and Ningzhen orefields,high-velocity anomalies in the crust-mantle transition zone increase rapidly in size and are widely distributed.The updoming also exists in the crust-mantle transition zone beneath the Jiurui and Edongnan orefields,but the high-velocity anomalies are mainly stellate distributed.The updoming high-velocity zone beneath the MLYB generally extends from the crust-mantle transition zone to the middle crust,different from the velocity structure in the upper crust.The upper crust beneath the Early Cretaceous extension-related Luzong and Ningwu volcanic basins is characterized by high velocity zones,in contrast to the low velocity anomalies beneath the Late Jurassic to Early Cretaceous compression-related Tongling ore field.The MLYB may have undergone a compressive-to-extensional transition during the Yanshanian(Jurassic-Cretaceous)period,during which extensive magmatism occurred.The near mantle-crustal boundary updoming was likely caused by asthenospheric underplating at the base of the lower crust.The magmas may have ascended through major crustal faults,undergoing AFC(assimilation and fractional crystallization)processes,became emplaced in the fault-bounded basins or Paleozoic sequences,eventually forming the many Cu-Fe polymetallic deposits there. | CHEN Anguo LÜ Qingtian ZHOU Taofa DU Jianguo DING Juan YAN Jiayong LU Zhitang | 2020 | Acta Geologica Sinica(English Edition)2020，94，6： | 1 |
| 14 | Siderophile and chalcophile metal variations in basalts: Implications for the sul- fide saturation history and Ni-Cu-PGE mineralization potential of the Tarim continental flood basalt province, Xinjiang Prov- ince, China 显示文摘 | Yuan Feng Zhou Taofa Zhang Dayu | 2012 | Ore Geology Reviews2012，45，： | 1 |
| 15 | Preface Research Progress of the Middle-Lower Yangtze River Valley Metallogenic Belt显示文摘Introduction to the Middle-Lower Yangtze River Valley Metallogenic Belt The Middle-Lower Yangtze River Valley metallogenic belt(MLYB)has been a cradle of modern metallogeny in China.In the MLYB,there are numerous stratabound sulfide deposits and polymetallic skarn-porphyry and magnetite-apatite deposits,together constituting a significant mineralogic exploration belt on the northern margin of the Yangtze craton.The deposit metallogenic series(Cheng et al.,1979),the metallogenic system(Zhai,1999),a porphyritic iron metallogenic model(Ningwu Iron Ore Research Group,1978),the continental fault depression belt in a syngenetic submarine copper deposit(Gu and Xu,1986),stratabound skarn(Chang et al.,1991)and the Mesozoic large-scale metallogenic explosion(Pan and Dong,1999;Mao et al.,1999)in the MLYB have been described and reviewed in detail.The Middle to Lower Yangtze region has been one of the main targets of research and exploration since the early period of geological work in China since the middle 20th century,Chang et al.(1991),Zhai et al.(1992),Tang et al.(1998)and other researchers have made a full review of the achievements before the 1990s.In the 21st century,much further research work has been carried out in the MLYB.Chang et al.(2012,2017,2019),Mao et al.(2011,2012),Pirajno and Zhou(2015),Xie et al. | ZHOU Taofa FAN Yu | 2020 | Acta Geologica Sinica(English Edition)2020，94，6： | 0 |
| 16 | Cathodoluminescence and Trace Element Composition of Scheelite from the Middle-Lower Yangtze River Metallogenic Belt(MLYB): Implications for Mineralization and Exploration显示文摘The Middle-Lower Yangtze River Metallogenic Belt(MLYB)is known to contain abundant copper and iron porphyry-skarn deposits,with an increasing number of tungsten deposits and scheelite in Fe-Cu deposits being discovered in the MLYB during recent decades.The ore genesis of the newly-discovered tungsten mineralization in the MLYB is poorly understood.We investigate four sets of scheelite samples from tungsten,iron and copper deposits,using CL imaging and LA-ICP-MS techniques to reveal internal zonation patterns and trace element compositions.The REE distribution patterns of four studied deposits show varying degrees of LREE enrichment with negative Eu anomalies.The oxygen fugacity of ore-forming fluid increased in Donggushan,while the oxygen fugacity of ore-forming fluid decreased in Ruanjiawan,Guilinzheng and Gaojiabang.The scheelites from the Donggushan,Ruanjiawan,Guilinzheng and Gaojiabang deposits show enrichment in LREEs and HFSE,with Nb/La ratios ranging from 1.217 to 52.455,indicating that the four tungsten deposits are enriched in the volatile fluorine.A plot of(La/Lu)N versus Mo/δEu can be used to distinguish quartz vein type,porphyry and skarn tungsten deposits.This study demonstrates that scheelite grains can be used to infer tungsten mineralization and are effective in identifying magmatic types of tungsten deposits in prospective mining sites. | NIE Liqing ZHOU Taofa CHEN Xuefeng WANG Fangyue XIAO Xin | 2020 | Acta Geologica Sinica(English Edition)2020，94，6： | 0 |
| 17 | Geochemistry and Geochronology of the Causative Intrusion and a New Genetic Model Study of the Yaojialing Polymetallic Skarn Deposit, Tongling District, China显示文摘The Yaojialing deposit is the first large-scale Zn-Au-Cu polymetallic skarn deposit located in the Shatanjiao ore field of the Tongling area in the Middle-Lower Yangtze belt.It has distinct metallogenic characteristics and is clearly different from the known skarn Cu-Au deposits in the Tongling area and the Middle-Lower Yangtze belt.Previous studies of the Yaojialing deposit have included rock geochemistry,alteration and mineralization characteristics,as well as metallogenesis and metallogenic models.However,there are still numerous problems concerning the coexistence of multiple elements,metallogenetic specialization of the magma and the metallogenic model.In this study,using the latest production exploration work on the deposit,we investigated the Yaojialing deposit including its geological characteristics,petrography,LA-ICP MS zircon U-Pb dating and whole rock geochemistry.Two kinds of magmatic rocks have been distinguished for the first time in the deposit,amongst which the granodiorite porphyry exposed on the surface of the mining area,which is the host rock of the veined lead-zinc ore body,is the wall-rock intrusion;and the deep concealed quartz monzonite porphyry is the causative intrusion,the distribution of orebodies and wall-rock alteration characteristics showing regular zoning around the quartz monzonite porphyry.The^(206)Pb/^(238)U weighted average age of the granodiorite porphyry is 140.2±1.0 Ma(MSWD=0.85,n=13)by LA-ICP MS zircon U-Pb dating,while the quartz monzonite porphyry is 138.9±1.2 Ma(MSWD=0.60,n=16),which is consistent with petrographic evidence.The geochemical characteristics show that the quartz monzonite porphyry is a high-K calc-alkaline series peraluminous rock.The trace element characteristics show that the quartz monzonite porphyry is enriched in LILE such as K,Rb,Sr,Ba and LREE,yet depleted in HFSE such as Nb,Ta,P and Ti.The Yaojialing deposit shows the mineralization characteristics of proximal skarn and distal skarn,having the common characteristics of'multi-storey'and'Trinity'metallogenic models. | XIONG Yanyun ZHOU Taofa FAN Yu CHEN Jing LIU Jun | 2020 | Acta Geologica Sinica(English Edition)2020，94，6： | 0 |
| 18 | Geochronology and Geochemistry of the Early Paleozoic Ore-host Volcanic Sequence in the Kalatag Area,East Tianshan,NW China:Implications for the Tectonic Evolution显示文摘The East Tianshan contains many late Paleozoic magmatic and polymetallic deposits.Recent studies demonstrate that the early Paleozoic volcanic rocks discovered in the northern region of East Tianshan can be subdivided into the Daliugou,Hongliuxia and Kalatag formations.Here,we report zircon U-Pb ages of volcanic rocks and quartz diorite porphyry,together with whole-rock geochemical and Sr-Nd isotope data of early Paleozoic volcanic rocks,in order to investigate their petrogenesis and geodynamic setting.Zircon U-Pb analyses of the rocks suggest that the Kalatag Formation formed at ca.438-413 Ma.Geochemical characteristics of the early Paleozoic volcanic rocks exhibit typical subduction-related features.They have high Mg^(#)(44-75),positiveε_(Nd)(t)values(0.25-7.88),low^(87)Sr/^(86)Sr ratios(0.70457 to 0.70588)and young two-stage Hf isotope model ages(551-446 Ma),consistent with a depleted mantle origin with limited crustal contamination.The basaltic andesite and andesite have relatively high MgO contents(6.1-9.4 wt%),suggesting that they belong to high-magnesian andesites.They were most likely derived from the partial melting of mantle peridotite caused by the addition of fluids released by subducted oceanic slab.Based on regional geology,geochemical characteristics and previous studies,we infer that the southward subduction of the Junggar Ocean slab resulted in the generation of early Paleozoic volcanic rocks and arc setting-related metallogenic systems in the Kalatag area. | ZHANG Zhenlong YANG Fuquan ZHOU Taofa GENG Xinxia ZHANG Zhixin YANG Chengdong QIU Zhanlin | 2023 | Acta Geologica Sinica(English Edition)2023，97，5： | 0 |
| 19 | Genesis of Mafic Microgranular Enclaves in the Shaocunwu Granodiorite,Southern China,and their Implications:Evidence from Zircon and Whole-rock Geochemistry显示文摘Magmatic microgranular enclaves(MMEs)are widely developed in the Shaocunwu granodiorite at the northeast margin of the eastern Jiangnan orogenic belt.Field geology showed that the MMEs occur as irregular ellipsoids near the edge of the intrusion,and consist of diorite,dominantly composed of amphibole,biotite,and plagioclase grains,with minor acicular apatite.Zircon U-Pb dating showed the ages of the host granodiorites and MMEs are 145.9±1.1 Ma and 145.6±2.5 Ma,respectively,indicating both originated during coeval late Jurassic magmatism.Whole-rock geochemical results show that the host granodiorite and MMEs have similar rare earth and trace element partition curves in spider grams,and similar 87Sr/86Sr,and 147Nd/144Nd isotope ratios,and their zircon 177Hf/176Hf isotopic ratios are similar.Geochemical studies indicate that both the host granodiorite and MMEs formed by mixing of coeval magma.Zircon Ti thermometers and oxygen fugacity of the host granodiorite and the MMEs show high oxygen fugacity,similar to that of W-Cu(Mo)mineralized granitoids in the eastern Jiangnan orogenic belt.A similar magma mixing process was probably one of the mechanisms that generated the W-Cu(Mo)fertile melts. | JIANG Hua ZHANG Dayu WANG Shiwei FU Xiang YE Longxiang Noel C.WHITE ZHOU Taofa | 2021 | Acta Geologica Sinica(English Edition)2021，95，3： | 0 |
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