检索结果-南通市图书馆

Hot subduction in the southern Paleo-Asian Ocean:Insights from clinopyroxene chemistry and Sr-Nd-Hf-Pb isotopes of Carboniferous volcanics in West Junggar

引用

Geoscience Frontiers 2024年第1期15卷 155-174页

作者： Yao xiao Xijun Liu wenjiao xiao xiao-Han Gong Hao Wu Yujia Song Zhiguo Zhang Pengde Liu Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration College of Earth SciencesGuilin University of TechnologyGuilin 541004China Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resource Guilin University of Technology Guilin 541004China National Key Laboratory of Ecological Security and Resource Utilization in Arid Areas Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 830011China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China College of Civil Engineering Hexi UniversityZhangye 734000China

The chemical evolution and pressure-temperature conditions of subduction zone magmatism along ancient suture zones in orogenic belts can provide important information regarding plate convergence processes in paleo-oceans.Carboniferous magmatism in West Junggar is key to understanding the tectonothermal and subduction history of the Junggar Ocean,which was a branch of the Paleo-Asian Ocean,as well as the accretionary processes in the southwestern Central Asian Orogenic Belt(CAOB).We undertook a geochronological,mineralogical,geochemical,and Sr-Nd-Hf-Pb isotopic study of volcanic rocks from the Baikouquan area of West Junggar.We used these data to determine the petrogenesis,mantle source,and pressure-temperature conditions of these magmas,and further constrain the subduction and tectonic history of the Junggar Ocean.The studied volcanic rocks yielded zircon U-Pb ages of 342-337 Ma and are characterized by enrichments of large-ion lithophile elements(LILEs),and depletions in high-field-strength elements(HFSEs),indicative of an island arc affinity.The volcanic rocks have positiveƐNd(t)(5.83-7.04)andƐHf(t)(13.47-15.74)values,87Sr/86Sr(t)ratios of 0.704023-0.705658,and radiogenic 207Pb/204Pb(t)and 208Pb/204Pb(t)ratios at a given 206Pb/204Pb(t)ratio,indicative of a depleted mantle source contaminated by subduction-related materials.Geochemical modeling calculations indicate that≤1%of a subduction component comprising fluid and sediment melt could have generated the source of the parental melts of the Baikouquan volcanic rocks.Clinopyroxene phenocrysts in the volcanic rocks are classified as high-and low-Ti clinopyroxene,and pressure-temperature calculations suggest the host rocks formed at high temperatures(~1300℃)and shallow to moderate depths(<2 GPa).The magma was probably generated by hot and hydrous melting in a mantle wedge in response to subduction of young,hot oceanic lithosphere.The present results,combined with published data,suggest that the Baikouquan volcanic rocks record a transition in tectonic setting fro

关键词： Hot subduction Sr-Nd-Hf-Pb isotopes Clinopyroxene chemistry West Junggar Central Asian Orogenic Belt

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plate divergent-convergent coupling system and dynamic mechanism of continental orogenic belts

引用

Science China Earth Sciences 2023年第8期66卷 1909-1912页

作者： wenjiao xiao Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011China

Since the establishment of the theory of plate tectonics in the1960s and 1970s,the comprehension of global tectonics has shifted from “fixism” to “mobilism”,which is hailed as a revolution in earth science(Vine,1966;Dewey and Bird,1970).According to the basic theoretical framework of plate tectonics,the Earth’s surface can be divided into a number of rigid lithospheric plates,which move relative to one another on the ductile asthenosphere,giving rise to deformation。

关键词： tectonics continental orogenic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Origin of the DUPAL anomaly in the Tethyan mantle domain and its geodynamic significance

引用

Science China Earth Sciences 2023年第12期66卷 2712-2727页

作者： Xijun LIU Jifeng XU wenjiao xiao Pengde LIU Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration&Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources in Guangxi College of Earth SciencesGuilin University of TechnologyGuilin 541004China School of Earth Sciences and Resources China University of GeosciencesBejing 100083China National Key Laboratory of Arid Area Ecological Security and Sustainable Development State Key Laboratory of Desert and Oasis Ecology Xinjiang Institute of Ecology and GeographyChinese Academy of SciencesUrumqi 83001lChina

Mantle heterogeneity has revealed systematic differences in Pb isotopic compositions between the Indian OceanSouth Atlantic mantle in the Southern Hemisphere and the Pacific Ocean-North Atlantic mantle in the Northern Hemisphere.This large-scale difference in mantle isotopes in the Southern Hemisphere is known as the DUPAL anomaly,but its origin remains controversial.Based on a systematic review of the Nd-Pb isotopic evolution of the Tethyan mantle domain,this study identified the long-term presence of the DUPAL anomaly in this domain since the early Paleozoic,characterized by long-term and high mantle thorium/uranium(Th/U)ratios.By comparing the Nd-Pb isotopic compositions of the Tethyan mantle domain with the Panthalassic-Pacific mantle domain(the Paleo-Asian,Paleo-Pacific,and modern Pacific oceans),it is shown that the mantle initially had low Th/U features due to early Earth crust-mantle differentiation,with the crust having high Th/U ratios.As such,the mantle initially had uniformly low Th/U ratios that were inherited throughout the Panthalassic-Pacific mantle domain.However,the plate tectonics and continental collisions in the Tethyan domain affected its characteristics,leading to the long-term and large-scale DUPAL anomaly.During the opening of and subduction in the Tethys Ocean,Gondwanaland fragmentation and frequent continent-continent collisions led to long-term and extensive crust-mantle interactions and the continuous input of highTh/U mantle sources,which thus modified the mantle.This process formed not only the unique DUPAL anomaly in the Tethyan mantle domain,but also the Tethyan tectonic domain dominated by continental collisions.Moreover,the high DUPAL anomaly in the Proto-and Paleo-Tethyan mantle domains records the effects of mantle plumes,which might have occurred primarily during the formation of the Proto-and Paleo-Tethys oceans during the early evolution of the Tethyan domain.Therefore,the inherent coupling of mantle domain properties and plate tectonic mechanisms provides important insight

关键词： Tethyan domain DUPAL anomaly Large low-shear-velocity provinces(LLSVPs) Ophiolite Geodynamics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

An Overview on the Composition and Age of Upper Crust of Proto-Tethyan Lajishan Intra-oceanic Arc,NE Tibet Plateau

引用

Acta Geologica Sinica(English Edition) 2024年第2期98卷 285-302页

作者： FU Changlei HE xiaohu YAN Zhen Jonathan CAITCHISON xiao wenjiao WANG Bingzhang LI Wufu LI Yusen SinoProbe Laboratory Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China Key Laboratory of the Northern Qinghai–Tibet Plateau Geological Processes and Mineral Resources Qinghai Geological Survey InstituteXining 810012China Department of Geology School of Earth SciencesYunnan UniversityKunming 650091China School of Earth and Environmental Sciences University of QueenslandBrisbane 4072Australia Xinjiang Institute of Ecology and Geography Chinese Academy of SciencesUrumqi 830011China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Earth Science and Resources China University of GeosciencesBeijing 100083China

Identification and anatomy of oceanic arcs within ancient orogenic belt are significant for better understanding the tectonic framework and closure process of paleo-ocean basin.This article summarizes the geological,geochemical,and geochronological characteristics of upper crust of Proto-Tethyan Lajishan intra-oceanic arc and provides new data to constrain the subduction evolution of the South Qilian Ocean.The intra-oceanic arc volcanic rocks,including intermediate-mafic lava,breccia,tuff,and minor felsic rocks,are distributed along southern part of the Lajishan ophiolite belt.Geochemical and isotopic compositions indicate that the intermediate-mafic lava were originated from depleted mantle contaminated by sediment melts or hydrous fluids,whereas the felsic rocks were likely generated by partial melting of juvenile mafic crust in intra-oceanic arc setting.Zircons from felsic rocks yield consistent and concordant ages ranging from 506 to 523 Ma,suggesting these volcanic rocks represent the relicts of upper crust of the Cambrian intra-oceanic arc.Combined with the Cambrian forearc ophiolite and accretionary complex,we suggest that the Cambrian intra-oceanic arc in the Lajishan ophiolite belt is belonging to the intra-oceanic arc system which was generated by south-directed subduction in the South Qilian Ocean at a relatively short interval between approximately 530 and 480 Ma.

关键词： volcanic rocks intra-oceanic arc U-Pb age Lajishan ophiolite belt South Qilian Ocean Proto-Tethyan realm

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Altaids, continental growth and metallogeny

引用

National Science Review 2023年第2期10卷 6-6页

作者： wenjiao xiao Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences

The Altaids,occupying vast tracts between the Baltica and Siberia Cratons to the north and the Tarim and North China Cratons to the south,was constructed by multiple subductions of the Paleo-Asian Ocean(PAO) from the Neoproterozoic to early Mesozoic [1,2].The Altaids typifies the largest accretionary orogenic collage on Earth and holds key information regarding cutting-edge theories of orogenic architecture and continental growth and economic benefits [2].

关键词： COLLAGE

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Voluminous continental growth of the Altaids and its control on metallogeny

引用

National Science Review 2023年第2期10卷 69-84页

作者： Tao Wang He Huang Jianjun Zhang Chaoyang Wang Guangyue Cao wenjiao xiao Qidi Yang Xuewei Bao Beijing SHRIMP Center Institute of Geology Chinese Academy of Geological Sciences Key Laboratory of Earth Probe and Geodynamics Chinese Academy of Geological Sciences National Key Laboratory of Arid Area Ecological Security and Sustainable Development Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Wuhan Center of China Geological Survey School of Earth Sciences Zhejiang University

The Altaids is generally considered to be the largest Phanerozoic accretionary orogen on Earth,but it is unclear whether it was associated with extensive continental crustal growth and whether there is a link between the crustal growth and ore mineralization.This paper reviews whole-rock Nd and zircon Hf isotope data for felsic-intermediate-mafic igneous rocks in the Altaids and presents Nd+Hf isotopic contour maps for this region.The maps highlight the 3D lithospheric compositional architecture of the Altaids and make it possible to quantitatively evaluate the crustal growth and its relationship with ore deposits.The Altaids hosts ～4 107 350 km2and ～184 830 750 km3(assuming a crustal thickness of 40-50 km) juvenile crust(εNd(t)> 0),accounting for 58% by isotope-mapped area(～7 010 375 km2) of almost all outcrops of the Altaids(～8 745 000 km2) and formed during 1000-150 Ma(mainly 600-150 Ma).The juvenile crustal,slightly juvenile-reworked crustal and slightly reworked crustal provinces controlled the Cu-Au,the Pb-Zn-Ag and the Li-Be,Nb-Ta and W-Sn ore deposits.According to the crustal architecture and background of deep compositions,we propose that the ore deposits can be grouped into three types:juvenile crust-related,mixed-source(or slightly juvenile crust)-related and reworked crust-related.This highlights the close relationship between accretion,continental growth and mineralization,and will facilitate exploration for specific ore-deposit types in the Altaids.

关键词： 3D lithospheric architecture architecture evolution juvenile crust igneous rocks isotopic mapping metallogeny Central Asian Orogenic Belt(CAOB)

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Oroclines in the Central Asian Orogenic Belt

引用

National Science Review 2023年第2期10卷 17-19页

作者： Yongjiang Liu wenjiao xiao Yongfei Ma Sanzhong Li A.Yu.Peskov Zhaoxu Chen Tong Zhou Qingbin Guan Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Lab of Submarine Geoscience and Prospecting TechniquesCollege of Marine Geosciences Ocean University of China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology National Key Laboratory of Ecological Security and Sustainable Development in Arid Areas Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences College of Earth Sciences Institute of Disaster Prevention Kosygin Institute of Tectonics and Geophysics Far East Branch Russian Academy of Sciences

The term ’orocline’ was first proposed by Carey [1] to describe the structure as ’an orogenic system which has been flexed in plane to a horse-shoe or elbow shape’;it usually emphasizes that a previous straight mountain belt or tectonic units have been bended horizontally.Nowadays the orocline has been used to describe any curved mountain belt regardless of its original shape [2].

关键词： KAZAKSTAN OROCLINE COLLAGE AMALGAMATION

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Rollback,scissor-like closure of the Mongol-Okhotsk Ocean and formation of an orocline:magmatic migration based on a large archive of age data

引用

National Science Review 2022年第5期9卷 167-178页

作者： Tao Wang Ying Tong wenjiao xiao Lei Guo Brian F.Windley Tatiana Donskaya Shan Li Narantsetseg Tserendash Jianjun Zhang Beijing SHRIMP Center Institute of Geology Chinese Academy of Geological Sciences Key Laboratory of Earth Probe and Geodynamics Chinese Academy of Geological Sciences Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and GeographyChinese Academy of Sciences School of Geography Geology and the EnvironmentUniversity of Leicester Institute of the Earth's Crust Siberian Branch Russian Academy of Sciences Institute of Geology Mongolian Academy of Sciences

Tracing the closure of oceans with irregular margins and the formation of an orocline are crucial for understanding plate reconstruction and continental assembly.The eastern Central Asian Orogenic Belt,where the Mongol-Okhotsk orocline is situated,is one of the world’s largest magmatic provinces.Using a large data set of U-Pb zircon ages,we updated the timing of many published igneous rocks,which allowed us to recognize tightly ’folded’ linear Carboniferous-Jurassic magmatic belts that wrap around the Mongol-Okhotsk suture and their migrations both sutureward and suture-parallel.The new successive magmatic belts reveal a rollback,scissor-like(or zipper-like) closure of the Mongol-Okhotsk Ocean that was fundamentally controlled by coeval subduction rollback and rotation of the Siberian and Mongolian-Erguna blocks.This study also demonstrates the complex mechanisms and processes of the closure of an ocean with irregular margins and the formation of a consequent orocline.

关键词： magmatic migration ocean closure orocline Mongol-Okhotsk Ocean

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Paleomagnetic, tectonic and geochronological constraints for Permian-Triassic oroclinal bending of the Mongolian collage

引用

National Science Review 2023年第2期10卷 9-11页

作者： Karel Schulmann Jean Bernard Edel Ondrej Lexa wenjiao xiao D.T■ebínová Richard Spikings Urs Schaltegger Arkadiusz Derkowski Marek Szczerba Centre for Lithospheric Research Czech Geological Survey Institut Terre et Environnement de Strasbourg Université de Strasbourg Institute of Petrology and Structural Geology Charles University Xinjiang Research Center for Mineral Resources Xinjiang Institute of Ecology and Geography Chinese Academy of Sciences Earth and Environmental Sciences Department of Earth Sciences University of Geneva Institute of Geological Sciences Polish Academy of Sciences

The Central Asian Orogenic Belt constitutes the Kazakhstan and Mongolian oroclinal collages located between the Tarim-North China collage(TNC)to the south and the Siberian craton to the north(Fig.1a) [1].While the oroclinal bending of the western Kazakhstan collage is widely accepted by the paleomagnetic and tectonic community,the oroclinal bending model of the eastern Mongolian collage is disputed[2,3].Despite differences,

关键词： ASIAN OROGENIC BELT DEFORMATION SIBERIA ALTAI

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

New paleomagnetic data confirm a dual-collision process in the Himalayas

引用

National Science Review 2015年第4期2卷 395-396页

作者： wenjiao xiao Institute of Geology and Geophysics Chinese Academy of Sciences

The India–Asia collision and continual plate convergence have created the Himalayan–Tibetan Orogen,which is the youngest and most spectacular continent–continent collision belt on Earth,and thus an ideal place for the study of continent–continent collisions[1,2].Although a large number of geological and geophysical investigations

关键词： data Asia Figure

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：