检索结果-南通市图书馆

Accretionary processes and metallogenesis of the Central Asian Orogenic Belt:Advances and perspectives

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2020年第3期63卷 329-361页

作者： Wenjiao XIao Dongfang SONG Brian FWINDLEY Jiliang LI Chunming HAN Bo WAN Ji'en ZHANG songjian ao Zhiyong ZHANG Research Centre for Mineral Resources Xinjiang Institute ofEcology and GeographyChinese Academy of SciencesUrumqi 830011China State Key Laboratory ofLithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Department of Geology University of LeicesterLeicester LEI 7RHUK

As one of the largest Phanerozoic orogens in the world,the Central Asian Orogenic Belt(CaoB)is a natural laboratory for studies of continental dynamics and *** paper summarizes the research progresses of the accretionary processes and metallogenesis of the CaoB since the Peopled Republic of China was founded,and puts forward the prospect for future *** the early period(1950s-1970s),several geological theories were applied to explain the geological evolution of Central *** the early period of China's reform and opening-up,the plate tectonics theory was applied to explain the evolution of the northern Xinjiang and Xingmeng regions,and the opinion of subduction-collision between Siberian Kazakhstan and China-North Korea-Tarim plates was *** idea of the Solonker-Yanbian suture zone was *** the 1990s,the study of the CaoB entered a period of rapid *** school of scholars including geologists from the former Soviet Union proposed a multi-block collision model for the assemblage of the *** contrast,another school of scholars,led by a Turkish geologist,Celal Sengor,proposed that the Altaids was formed through the growth and strike-slip duplicates of a single island arc,and pointed out that the Altaids is a special type of collisional *** this period,Chinese geologists carried out a lot of pioneering researches on ophiolites and high-pressure metamorphic rocks in northern China,and confirmed the main suture zones *** 1999,the concept of"Central Asian metallogenic domain"was proposed,and it became one of the three major metallogenic domains in the *** the 21st century,given the importance for understanding continental accretion and metallogenic mechanism,the CaoB has become the international academic *** has laid out a series of scientific research projects in Central Asia.A large number of important scientific research achievements have been spawned,including the tecto

关键词： CaoB Accretionary orogenic processes Metallogenesis Research progress Research frontier

Rhenium-Osmium Isotope Constraints on the Origin of the Tianyu Cu-Ni Deposit in the East Tianshan Orogenic Belt, Xinjiang, NW China

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2022年第2期96卷 525-535页

作者： HAN Chunming XIao Wenjiao ao songjian ZHANG Jien SONG Dongfang ZHANG Zhiyong SONG Shuaihua XIE Mingcai Key Laboratory of Mineral Resource Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China

The Tianyu Cu-Ni sulfide deposit occurs in the north margin of the Central Tianshan Arc in East Tianshan orogenic belt, Xinjiang, NW China. The intrusions consist of gabbro, peridotite, and olivine pyroxenite. The peridotite and pyroxenite are the main host rock for the Cu-Ni ores. Rhenium and osmium isotopic analyses of Ni-and Cu-bearing sulfide minerals from the deposit have been used to determine the source of osmium, and by inference, the sources of ore metals. Sulfide ore samples have Os and Re concentrations varying in the ranges 1.85 to 4.58 ppb and 93.56 to 146.00 ppb, respectively. An initial ^(187)Os/^(188)Os ratio ranges from 0.86 to 1.23 for the ores and the γOs values from 592 to 2227. Osmium isotopic data suggest that the Tianyu intrusion and associated Cu-Ni mineralization has derived from crustal-contaminated mantle melts. The intrusions early show island-arc geochemical signatures, which indicate that the Hulu mafic–ultramafic intrusions, along with the Cu-Ni deposit, formed as a result of subduction of oceanic crust in the Early Permian.

关键词： rhenium-osmium isotope Cu-Ni deposit Tianyu intrusion East Tianshan orogenic belt Xinjiang

Anatomy of composition and nature of plate convergence： Insights for alternative thoughts for terminal India-Eurasia collision

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2017年第6期60卷 1015-1039页

作者： XIao WenJiao ao songjian YANG Lei HAN ChunMing WAN Bo ZHANG Ji'En ZHANG ZhiYong LI Rui CHEN ZhenYu SONG ShuaiHua State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Chinese Academy of Sciences Center for Excellence in Tibetan Plateau Earth Science Chinese Academy of Sciences Beijing 100101 China University of Chinese Academy of Sciences Beijing 100049 China

The pattern and timing of collision between India and Eurasia have long been a major concern of the international community. However, no consensus has been reached hitherto. To explore and resolve the disagreements in the Himalayan study,in this paper we begin with the methodology and basic principles for the anatomy of composition and nature of convergent margins,then followed by an effort to conduct a similar anatomy for the India-Eurasia collision. One of the most common patterns of plate convergence involves a passive continental margin, an active continental margin and intra-oceanic basins together with accreted terranes in between. The ultimate configuration and location of the terminal suture zone are controlled by the basal surface of the accretionary wedge, which may show fairly complex morphology with Z-shape and fluctuant geometry. One plausible method to determine the terminal suture zone is to dissect the compositions and structures of active continental margins. It requires a focus on various tectonic elements belonging to the upper plate, such as accretionary wedges, high-pressure(HP)-ultra-high-pressure(UHP) metamorphic rocks, Barrovian-type metamorphic rocks and basement nappes, together with superimposed forearc *** geological records can define the extreme limits and the intervening surface separating active margin from the passive one,thus offering a general sketch for the surface trace of the terminal suture zone often with a cryptic feature. Furthermore, the occurrence of the cryptic suture zone in depth may be constrained by geophysical data, which, in combination with outcrop studies of HP-UHP metamorphic rocks, enables us to outline the terminal suture zone. The southern part of the Himalayan orogen records complicated temporal and spatial features, which are hard to be fully explained by the classic "two-plate-one-ocean" template,therefore re-anatomy of the compositions and nature for this region is necessitated. Taking advantage of

关键词： Himalayan orogen Yarlung-Zangbo ophiolite Tethyan Himalayan Sequence India-Eurasia collision Anatomy of orogeny

How many sutures in the southern Central Asian Orogenic Belt:Insights from East Xinjiang-West Gansu(NW China)?

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2014年第4期5卷 525-536页

作者： Wenjiao Xiao Chunming Han Wei Liu Bo Wan Ji'en Zhang songjian ao Zhiyong Zhang Dongfang Song Zhonghua Tian Jun Luo Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and Geography.Chinese Academy of Sciences State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences

How ophiolitic mèlanges can be defined as sutures is controversial with regard to accretionary orogenesis and continental *** Chinese Altay,East junggar,Tianshan,and Beishan belts of the southern Central Asian Orogenic Belt（CaoB） in Northwest China,offer a special natural laboratory to resolve this *** the Chinese Altay,the Erqis unit consists of ophiolitic melanges and coherent assemblages,forming a Paleozoic accretionary *** least two ophiolitic melanges（Armantai,and Kelameili） in East Junggar,characterized by imbricated ophiolitic melanges,Nb-enriched basalts,adakitic rocks and volcanic rocks,belong to a Devonian-Carboniferous intra-oceanic island arc with some Paleozoic ophiolites,superimposed by Permian arc *** the Tianshan,ophiolitic melanges like Kanggurtag,North Tianshan,and South Tianshan occur as part of some Paleozoic accretionary complexes related to amalgamation of arc *** the Beishan there are also several ophiolitic melanges,including the Hongshishan,Xingxingxia-Shibangjing,Hongliuhe-Xichangjing,and Liuyuan ophiolitic *** ophiolitic melanges in the study area are characterized by ultramafic,mafic and other components,which are juxtaposed,or even emplaced as lenses and knockers in a matrix of some coherent *** tectonic settings of various components are different,and some adjacent units in the same melange show contrasting different tectonic *** formation ages of these various components are in a wide spectrum,varying from Neoproterozoic to *** we cannot assume that these ophiolitic melanges always form in linear sutures as a result of the closure of specific *** the ophiolitic components formed either as the substrate of intra-oceanic arcs,or were accreted as lenses or knockers in subduction-accretion *** published age and paleogeographic constraints,we propose the presence of （1） a major early Paleozoic tectonic boundary that separates the Chinese Altay-East

关键词： Major suture Paleogeographic separation Accretionary complex Intra-oceanic arc Southern CaoB

Age and tectonic setting of magmatic sulfide Cu-Ni mineralization in the Eastern Tianshan Orogenic Belt,Xinjiang,Central Asia

在线全文

学校读者我要写书评

暂无评论

Age and tectonic setting of magmatic sulfide Cu-Ni mineraliz...

Tectonic implications of Re-Os dating of molybdenum deposits in the Tianshan–Xingmeng Orogenic Belt,Central Asia

中国科学院地质与地球物理研究所2013年度（第13届）学术年会

作者： Chunming HAN Wenjiao XIao Guochun ZHao Benxun SU songjian ao Jien ZHANG Bo WAN Institute of Geology and Geophysics Chinese Academy of Sciences Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences Department of Earth Sciences The University of Hong Kong

During the Late Paleozoic,extensive magmatism and associated ore deposits were developed in the Eastern Tianshan Orogenic Belt(the Central Asian Orogenic Belt,NW China).In order to better constrain the petrogenesis of the intrusions in the area,we performed major-and trace-element whole-rock geochemical analyses as well as in situ zircon U-Pb and Hf isotopic analyses from the Xiangshan,Luodong and Poshi *** 276-284 Ma ultramafic and mafic rocks(associated with magmatic Cu-Ni sulfide deposits of the same age)have variable Hfisotopic compositions(ε(t)= -10.3 to+14.3),indicating an origin via the contamination of depleted mantle-derived magma by variable amounts of ancient lower *** large mafic-ultramafic complexes were emplaced most likely during closure of the ancient Tianshan Ocean,resulting in the formation of several magmatic Cu-Ni sulfide deposits in the Early Permian times.

关键词： Cu-Ni magmatic deposits zircon SIMS U-Pb dating Hf isotopes petrogenesis Eastern Tianshan Orogenic Belt Central Asian Orogenic Belt

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Tectonic implications of Re-Os dating of molybdenum deposits...

新疆东天山葫芦铜镍硫化物矿床Re-Os同位素物质来源示踪研究

中国科学院地质与地球物理研究所2014年度（第14届）学术年会

作者： Chunming Han Wenjiao Xiao Guochun Zhao Benxun Su songjian ao Jien Zhang Zhiyong Zhang Bo Wan Zhongmei wang Key laboratory of Mineral Resources Institute of Geology and GeophysicsChinese Academy of Sciences Department of Earth Sciences The University of Hong Kong

The Tianshan–Xingmeng molybdenum belt is part of a larger E–W-trending metallogenic belt in northern *** of these molybdenum deposits occur as porphyry or porphyry-skarn type,but there are also some vein-type *** systematic Re-Os dating of molybdenite from four deposits and comparisons with two previously dated deposits,we conclude that molybdenum mineralization in the Tianshan–Xingmeng Orogenic Belt resulted from hydrothermal activity linked to the emplacement of granitoid *** pulses of granitoid magmatism and Mo mineralization have been recognized in this study,corresponding to tectonic events in the Tianshan–Xingmeng Orogenic *** identify five distinct stages of Mo mineralization events in the Tianshan–Xingmeng Orogenic Belt:320–250 Ma,250–200 Ma,190–155Ma,155–140 Ma,and 140–120 *** Palaeozoic(320–250 Ma)Mo mineralization was closely related to closure of the Palaeo-Asian Ocean and collision between the Siberia and Tarim ***(250–200 Ma)Mo mineralization occurred in a post-collisional tectonic *** Early–Middle Jurassic(190–155 Ma)Mo mineralization was related to subduction of the Palaeo-Pacific Ocean on the eastern Asian continental margin,whereas in the Erguna block,the Mo mineralization events were associated with the subduction of the Mongol–Okhotsk *** 155 to 120 Ma,large-scale continental extension occurred in the Tianshan–Xingmeng Orogenic Belt and surrounding ***,the Late Jurassic(150–140 Ma)Mo mineralization events in these areas evolved in a post-orogenic extensional environment of the Mongol–Okhotsk Ocean subduction *** Early Cretaceous(140–120 Ma)Mo mineralization occurred under the combined effects of the closure of the Mongol–Okhotsk Ocean and subduction of the Palaeo-Pacific Ocean.

关键词： Re-Os dating molybdenum deposits tectonic setting Tianshan–Xingmeng Orogenic Belt Central Asia

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

岩石学报 2008年第10期24卷 2359-2370页

作者：胡克兵姚书振屈文俊杜安道敖松坚中国地质大学武汉430074 国家地质实验测试中心北京100037 中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029

通过对葫芦铜镍硫化物矿石的Re-Os同位素物质来源示踪研究,其^(187)Os/^(188)Os初始比值介于1.40～1.97,γOs值介于1110～1565,平均为1379,表明在成矿过程及岩浆侵位期间有大量地壳物质加入到成矿系统中。

关键词： Re-Os同位素铜镍硫化物矿床葫芦东天山

The Neo-Tethys formed by oceanic detachment fault at late Eocene in Zagros, Iran

在线全文

学校读者我要写书评

暂无评论

The Neo-Tethys formed by oceanic detachment fault at late Eo...

甘肃北山雀儿山蛇绿混杂岩的厘定及其地质意义

2014年中国地球科学联合学术年会——专题54：特提斯构造

作者： songjian ao Wenjiao Xiao Morteza Talebian Morteza Khalatbari-Jafari Ling Chen Bo Wan Weiqiang Ji Zhiyong Zhang State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Research Institute for Earth Sciences Geological Survey of Iran Tehran Iran

The geodynamic evolution of Zagros domains remains *** particular,the timing of the formation of the Zagros ophiolites and of the closure of the Neo-Tethys Ocean are highly *** our study,we present new precise zircon U-Pb data showing that the youngest part of Kermanshah ophiolite complex was formed at Late *** evidence shows that the Kemanshah ophiolite was probably an ancient oceanic

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

地质科学 2021年第2期56卷 471-482页

作者：刘洋方同辉郑小明毛启贵敖松坚中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029 中国科学院大学北京100049 中国科学院地球科学研究院北京100029 有色金属矿产地质调查中心北京100012 北京矿产地质研究院北京100012

蛇绿岩是认识古洋盆演化的关键,为人们研究大洋岩石圈特征、古板块重建、地幔物质组成以及板块俯冲过程等提供了重要依据。本研究新发现的雀儿山蛇绿混杂岩,位于中—蒙边境附近,大地构造位置属于大南湖—雀儿山—圆包山岛弧带,其围岩为... 详细信息

蛇绿岩是认识古洋盆演化的关键,为人们研究大洋岩石圈特征、古板块重建、地幔物质组成以及板块俯冲过程等提供了重要依据。本研究新发现的雀儿山蛇绿混杂岩,位于中—蒙边境附近,大地构造位置属于大南湖—雀儿山—圆包山岛弧带,其围岩为绿条山组上段板岩段和白山群上亚群的绿泥千枚岩组,区域上的绿条山组和白山群上亚群可能不是连续沉积的岩石地层单元,而是弧前增生杂岩。雀儿山蛇绿混杂岩的岩性组合包括:片理化蛇纹岩、蛇纹石化辉石橄榄岩、辉长岩、玄武岩、安山质熔岩/角砾岩、英安岩、凝灰质砂岩、硅泥质岩、灰岩及大理岩。结合区域地质资料,雀儿山蛇绿混杂岩的增生就位时代可能为中三叠世。

关键词：雀儿山蛇绿混杂岩构造特征甘肃北山中亚造山带