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国家自然科学基金(41230207)

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11 条 记 录,以下是 1-10
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GEOCHRONOLOGIC AND GEOCHEMICAL EVIDENCE FOR PERSISTENCE OF SOUTH-DIPPING SUBDUCTION TO LATE PERMIAN TIME, LANGSHAN AREA, INNER MONGOLIA(CHINA): SIGNIFICANCE FOR TERMINATION OF ACCRETIONARY OROGENESIS IN THE SOUTHERN ALTAIDS
The Langshan area in Inner Mongolia is situated in the southern Altaids between the Beishan suture to the west...
LI’NA LINWENJIAO XIAOBO WANBRIAN F.WINDLEYSONGJIAN AOCHUNMING HANJIANYUN FENGJI’EN ZHANGZHIYONG ZHANG
关键词:PERMIAN
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How Central Asian Orogeny Evolves:New Insights from End-Permian to Middle Triassic Magmatic Record along the Solonker Suture Zone被引量:2
2016年
Objective The modem Earth is characterized by two types of orogens: collisional orogen and accretionary orogen. It is widely accepted that the Central Asian Orogenic Belt (CAOB) is made up of widespread multiple ancient archipelagos. It has been recognized as a non-collisional orogen, contrasting with the archetypical Alpine- Himalayan-type collisional orogens. Although the CAOB is traditionally compared to subduction-accretion systems that have been well studied, all accretionary orogens ultimately passed into a collisional phase at the end of the orogenic Wilson cycle due to ocean closure and termination of subduction, which will lead to subsequent crustal shortening, thickening and reworking. Therefore, the archipelago-type CAOB may also preserve a terminal collision record, although this is not a classic continental collision at all.
LI ShanCHUNG SunlinSimon A.WILDEWANG TaoXIAO WenjiaoGUO Qianqian
Underplating generated A- and I-type granitoids of the East Junggar from the lower and the upper oceanic crust with mixing of mafic magma:Insights from integrated zircon U-Pb ages,petrography,geochemistry and Nd-Sr-Hf isotopes
Whole rock major and trace element,Nd-Sr and zircon Hf isotopic compositions and secondary-ion mass spectromet...
Wei LiuXiu-Jin LiuLi-Juan Liu
关键词:UNDERPLATING
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北山造山带古生代浊积岩构造环境探讨及其大地构造意义被引量:5
2013年
北山造山带是研究中亚造山带增生造山的关键地区之一,浊积岩是增生造山带的重要组成部分。北山古生代浊积岩主要出露于营毛沱、柳园和黑山口地区。营毛沱浊积岩发育于下奥陶统,古水流方向由南向北,内部砂岩具中高等风化程度的长英质源区,构造背景为被动陆缘。早二叠世柳园浊积岩内部砂岩具低到中等风化程度的中基性源区,构造背景为大洋岛弧。早二叠世黑山口浊积岩中的砂岩源区具中等风化程度,环境相对柳园砂岩较为稳定,和长英质源区的沉积岩具相似性,构造环境可能为活动陆缘弧。对北山古生代浊积岩的解剖揭示北山古生代经历了复杂的俯冲增生过程。早古生代花牛山—火石山一带发育向北的俯冲,火石山南部被动陆缘形成营毛沱浊积岩,之后的俯冲带局部后撤形成泥盆纪墩墩山岛弧。柳园地区晚古生代洋壳向花牛山和石板山岛弧带俯冲分别形成了柳园和黑山口浊积岩。本研究支持北山增生时间持续到早二叠世的观点,对认识天山、索伦缝合带的衔接对比研究具有重要的意义。
郭谦谦肖文交侯泉林韩春明曲军锋田忠华宋东方
关键词:浊积岩源区性质
Early Carboniferous intra-oceanic arc and back-arc basin system in the West Junggar,NW China
<正>A series of Lower Carboniferous volcanic rocks occur in the Hatu,Darbut,and Baogutu areas of Xinjiang Provi...
Ping ShenHongdi PanWenjiao XiaoXian-hua LiHuawu DaiHeping Zhu
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Petrogenesis and tectonic settings of the Late Carboniferous Jiamantieliek and Baogutu ore-bearing porphyry intrusions in the southern West Junggar,NW China
<正>Porphyry Cu deposits occurred in the southern West Junggar of Xinjiang,NW China and are represented by the ...
Ping ShenWenjiao XiaoHongdi PanLianhui DongChaofeng Li
关键词:BAOGUTUXINJIANG
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Mega-fold interference patterns in the Beishan orogen(NW China) created by change in plate configuration during Permo-Triassic termination of the Altaids
Kilometer-size fold interference patterns in the Beishan Orogenic Collage(BOC)in the southernmost Altaids form...
Zhonghua TianWenjiao XiaoYehua ShanBrian WindleyChunming HanJi'en ZhangDongfang Song
关键词:ALTAIDS
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Northward subduction-related orogenesis of the southern Altaids:Constraints from structural and metamorphic analysis of the HP/UHP accretionary complex in Chinese southwestern Tianshan,NW China被引量:5
2015年
The Chinese Tianshan belt of the southern Altaids has undergone a complicated geological evolution. Different theories have been proposed to explain its evolution and these are still hotly debated. The major subduction polarity and the way of accretion are the main problems. Southward, northward subduction and multiple subduction models have been proposed. This study focuses on the structural geology of two of the main faults in the region, the South Tianshan Fault and the Nikolaev Line. The dip direction in the Muzhaerte valley is southward and lineations all point towards the NW. Two shear sense motions have been observed within both of these fault zones, a sinistral one, and a dextral one, the latter with an age of 236-251 Ma. Structural analyses on the fault zones show that subduction has been northward rather than southward. The two shear sense directions indicate that the Yili block was first dragged along towards the east due to the cloclkwise rotation of the Tarim block. After the Tarim block stopped rotating, the Yili block still kept going eastward, inducing the dextral shear senses within the fault zones.
Mark ScheltensLifei ZhangWenjiao XiaoJinjiang Zhang
Mid–Late Paleozoic metallogenesis and evolution of the Chinese Altai and East Junggar Orogenic Belt, NW China, Central Asia
The Chinese Altai–East Junggar collage in southern Altaids is one of the largest and most important metallogen...
Chunming HANWenjiao XIAOGuochun ZHAOBenxun SUPatrick Asamoah SAKYISongjian AOBo WANJien ZHANGZhiyong ZHANGZhongmei WANG
关键词:METALLOGENESIS
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Polyphase deformation of a Paleozoic forearc–arc complex in the Beishan orogen, NW China
The Lebaquan Complex in the central Beishan(NW China) plays a signi ficant role in understanding the subductio...
Dongfang SongWenjiao XiaoChunming HanZhonghua Tian
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