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Late Mesozoic Exhumation of the Huangling Massif:Constraints on the Evolution of the Middle Yangtze River

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Acta Geologica Sinica(English Edition) 2024年第1期98卷 250-264页

作者： SU Jianchao LIN Xu LI Chang’an Jolivet MARC wu Lin CHENG Feng DENG Bin wu Zhonghai CHEN Xiaokang HU Chengwei School of Geography and Information Engineering China University of GeosciencesWuhan 430074China College of Civil Engineering and Architecture China Three Gorges UniversityYichangHubei 443002China Géosciences Rennes CNRS-UMR6118Univ RennesRennesFrance State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBejing 100029China Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of EducationSchool of Earth and Space SciencesPeking UniversityBeijing 100871China State Key Laboratory of Oil and Gas Reservoir geology and Exploitation/Chengdu University of Technology Chengdu 100871China institute of Geological Mechanics Chinese Academy of Geological ScienceBeijing 100081China

Plate subduction leads to complex exhumation processes on *** Huangling Massif lies at the northern margin of the South China *** the Huangling Massif was exhumed as a watershed of the middle reaches of the Paleo-Yangtze River during the Mesozoic remains under *** examined the exhumation history of the Huangling Massif based on six granite bedrock samples,using apatite fission track(AFT)and apatite and zircon(U-Th)/He(AHe and ZHe)*** samples yielded ages of 157–132.Ma(ZHe),119–106 Ma(AFT),and 114–72.Ma(AHe),*** modeling revealed that three phases of rapid cooling occurred during the Late Jurassic–Early Cretaceous,late Early Cretaceous,and Late *** exhumation processes led to the high topographic relief responsible for the emergence of the Huangling *** integrated of our new data with published sedimentological records suggests that the Huangling Massif might have been the watershed of the middle reaches of the Paleo-Yangtze River since the *** that time,the rivers flowed westward into the Sichuan Basin and eastward into the Jianghan *** subduction of the Pacific Plate beneath the Asian continent in the Mesozoic deeply influenced the geomorphic evolution of the South China Block.

关键词： apatite zircon (U-Th)/He fission track Huangling Massif Yangtze River

Ultramafic xenoliths in Mesozoic diorite in west Shandong Province

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Science China Earth Sciences 2004年第6期47卷 489-499页

作者： CHEN Lihui1,2.& ZHOU Xinhua2.1.The Key Laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,China and School of Earth and Space Sciences,Peking University,beijing 100871,China 2.institute of {2. and geophysics,Chinese Academy of Sciences,beijing 10002.,China Correspondence should be addressed to Chen Lihui(email: lihui_chen@***) The Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education China and School of Earth and Space Science Peking University Beijing China institute of geology and {2. Chinese Academy of Sciences Beijing China

Ultramafic xenoliths are common in Tietonggou intrusion, Laiwu, Shandong Prov-ince. Peridotite xenoliths develop two-stage metasomatism popularly: (i) The early metasoma-tism is characterized by intergranular clinopyroxene and phlogopite; (ii) The later metasomatism is characterized by orthopyroxene veins with a few plagioclases and amphiboles. These ul-tramafic xenoliths are thought to be mostly from the crust-mantle transitional zone on the basis of their combination, mineral chemistry, equilibrium temperature, and metasomatic characteristics. Major elements, rare earth elements, and Sr-Nd isotopic composition of the ultramafic xenoliths indicate that there is a petrogenetic relationship between the silica-enriched xenoliths and their host diorites. We propose that such silica enrichment might be an indicator of melt-rock interac-tions in the Mesozoic lithosphere beneath western Shandong.

关键词： ultramafic xenoliths, crust-mantle transitional zone,metasomatism, Tietonggou intrusion, Laiwu.

Volcanic Facies and Their Reservoirs Characteristics in Eastern China Basins

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地学前缘 2009年第S1期16卷 152-153页

作者： Chunshuang Jin~(1,2.,Dewu Qiao~2.Wenli Pan~3 1.institute of {2. and {2.,Chinese Academy of Sciences,beijing 10002.,China. 2.Strategic Research Center of Oil & Gas Resources,Ministry of Land & Resources,beijing 100034,China 3.Geophysical Exploration Research institute of Huabei Oilfield Company,Renqiu 062.52.China

In these years,the Upper Jurassic andesitic volcanic reservoirs in Erlian basin,the Lower Cretaceous rhyolitic volcanic reservoirs in Songliao Basin,the Cretaceous rhyolitic,and the Paleogene basaltic and trachytic volcanic reservoirs in Bohai Bay Basin,and the basaltic volcanic reservoirs in Subei basin were *** more and more volcanic oil and gas fields being discovered and developed,the volcanic rocks demonstrate a great petroleum potential in eastern basins of *** volcanic facies were identified in these basins,including volcanic conduit facies,explosive facies,effusive facies。

关键词： volcanic rocks volcanic facies reservoirs porosity types

Palinspastic reconstruction and geological evolution of Jurassic basins in Mongolia and neighboring China

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Journal of Palaeogeography 2013年第3期2卷 306-317页

作者： wu genyao institute of geology and {2. Chinese Academy of Sciences

The important event in Jurassic tectonics in Mongolia was the subduction and closure of the Mongolia-Okhotsk ocean;correspondingly,basin evolution can be divided into two main stages,related to the orogeny and collapse of the orogenic belt,*** developing of Early-Middle Jurassic basins to the north of the ocean resulted from back-arc *** fossil sutures,from the China-SE Asia sub-continent to the south of the ocean,were rejuvenated by subduction-related orogeny;in addition,the Yanshanian intra-continental movement *** Early-Middle Jurassic molasse basins were developed by movement in Inner Mongolia,all of which stretched westwards (or northwards) into Mongolia;therefore,the molasse basins in eastern and southern Mongolia had the same geometric and kinematic features as the basins in the Inner *** to the collapse of the MongoliaOkhotsk orogenic belt,a group of rift basins developed during the Late *** eastern Mongolia,the NE orientated extensional basins were controlled by the neogenic *** contemporary basins in southern Mongolia and the neighboring areas in China were constrained by remobilization (inherited activation) of the latitudinal or ENE-directional basement *** stages can be recognized in the evolution of the Early-Middle Jurassic basins after reversal;the basins also experienced four episodes of reformation.

关键词： back-arc extension molasse basin collapse rift basin evolution basement structure neogenic structure Jurassic Mongolia and neighboring China

Environmental magnetic studies of lacustrine sediments

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Chinese Science Bulletin 2002年第7期47卷 613-616页

作者： HU Shouyun, DENG Chenglong, E. Appel & K. L. VerosubNanjing institute of Geography and Limnology, Nanjing 2.0008, China institute of {2. and geophysics, beijing 100101, China Institut fur Geologic, Universitat Tubingen, 72.76 Tubingen, Germany Departm Nanjing institute of Geography and Limnology Nanjing China institute of geology and {2. Beijing China Institut für Geologie Universität Tübingen Tübingen Germany Department of geology University of California Davis USA

In recent decades, environmental magnetism has become an important method for studying past global climatic and environmental changes. For an environmental magnetic study, it is important to understand the magnetic properties of various magnetic minerals in lacustrine sediments and the processes involved in the formation, transport, and preservation of these magnetic minerals. The magnetic response of lacustrine sediments to climatic change may vary widely from lake to lake. To reconstruct the processes contributing to paleoclimatic and paleoenvironmental change, it is, therefore, necessary to derive a complete understanding of the potential origin of the magnetic signal observed.

关键词： rock magnetism paleoclimate paleoenvironment lacus-trine sediments.

Nd isotopic characteristics of Proterozoic metasedimentary rocks and constraints on their provenance in the eastern segment of Central Tianshan Belt, Xinjiang

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Progress in Natural Science:Materials International 2003年第12期 28-33页

作者： LI Qiugen 1, LIU Shuwen 1*, HAN Baofu 1, ZHANG Jian 1 and CHU Zhuyin 2.1. The Key Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, beijing 100871, China 2. institute of {2. and geophysics, Chinese Academy of Sciences, beijing 10002., China) The Key Laboratory of Orogenic Belts and Crustal Evolution Ministry of Education School of Earth and Space Sciences Peking University Beijing 100871 China institute of geology and {2. Chinese Academy of Sciences Beijing 100029 China

Sm Nd isotopic characteristics, ε Nd ( t ) values and Nd model ages ( T DM ) of Proterozoic metasedimentary rocks in the eastern segment of Central Tianshan Belt (ESCTB), Xinjiang, are used to constrain the sedimentary provenance as well as to evaluate their tectonic implications. ε Nd ( t ) and T DM values of these samples range from -4.00 to +6.36 and from 1.2. to 2.2. Ga, respectively. These feature values are distinguished from those of Archean Tarim Craton. Their average ε Nd ( t ) values of the Weiya, the Kumishi and the south to the Dikar samples are -2.46, +2.06 and +1.37, respectively. Nd model ages of the Weiya samples vary between 1.86 and 2.2. Ga , but those of the Kumishi and the south to the Dikar samples show a significant concentration at 1.6～1.9 Ga and the youngest Nd model age is 1.2. Ga. Those Nd isotopic characteristics suggest that these metasedimentary rocks could be derived from a significant proportion of Paleoproterozoic crustal source and a participation of young arc materials, rather than Archean Tarim Craton. Furthermore, the data also indicate that these two sources were paleogeographically separated. Thus we can deduce that the Kumishi and the south to the Dikar metasedimentary rocks were formed proximal to the arc side of the back arc basin, but the Weiya metasedimentary rocks were closer to the continental side of the back arc basin.

关键词： Nd isotopic features metasedimentary rocks Xingxingxia group provenance and forming time Tectonic setting the ESCTB of Xinjiang.

Tectonic Units and Their Fundamental Characteristics on the Northern Margin of the Alxa Block

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Acta Geologica Sinica(English Edition) 1993年第4期67卷 373-385页

作者： wu Tairan geology Department, China University of Geosciences, {2. and He Guoqi geology Department, Peking University Jiang Minxi geology Department China University of Geosciences Beijing China

The northern margin of the Alxa block is the junction of a tectonic units. Four first-order tectonic units are distinguished: 1. the Yagan structural zone characteristic of an immature island arc; 2. the Zhusileng-Hangwula structural zone, which was a passive continental margin in the Early Palaeozoic and was transformed into an active continental margin in the Late Palaeozoic;3. the Shalazha structural zone characteristic of a mature island arc; 4. the Nuru-Langshan structural zone, which was a Proterozoic orogenic belt and later evolved into an extensional transtional crust in the Palaeozoic. The above-mentioned tectonic units differ remarkably in sedimentary formations, magmatic rock associations, metamorphism and geochemistry and are bounded by faults between one another.

关键词： Alxa structural zone boundary rock association

Mineralization episode of porphyry copper deposits in the Jinshajiang-Red River mineralization belt: Re-Os dating

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Science China Earth Sciences 2005年第2期48卷 192-198页

作者： WANG Denghong, QU Wenjun, LI Zhiwei, YIN Hanlong4 & CHEN Yuchuan institute of Mineral Resources, Chinese Academy of Geological Sciences, beijing 100037, China National Center of Rock and Mineral Analysis, Chinese Academy of Geological Sciences, beijing 100037, China Resource Assessment Center of Yunnan, Kunming 650011, China institute of geology and geophysics, Chinese Academy of Sciences, beijing 100101, China Chinese Academy of Geological Sciences, beijing 100037, China institute of Mineral Resources Chinese Academy of Geological Sciences Beijing China National Center of Rock and Mineral Analysis Chinese Academy of Geological Sciences Beijing China Resource Assessment Center of Yunnan Kunming China institute of geology and {2. Chinese Academy of Sciences Beijing China Chinese Academy of Geological Sciences Beijing China

Re-Os isotopic dating for the molybdenites from the porphyry copper deposits of the Jinshajiang-Red River mineralization belt in Yunnan Province yields isochron ages of 33.9±1.1 Ma for the Machangqing deposit and 34.4±0.5 Ma for the Tongchang deposit. This result shows that both the Machangqing and the Tongchang porphyry Cu-Mo deposits from two different ore-fields formed simultaneously. This new data and the published Re-Os model ages of molybdenite (35.4 Ma, 35.9 Ma, 36.2.Ma) of the Yulong porphyry copper deposit in Tibet, which is located in the same Jinshajiang-Red River mineralization belt as the Machangqing deposit and the Tongchang deposit, suggest that these three Cenozoic porphyry copper deposits in the Jinshajiang-Red River mineralization belt were contemporary for their mineralization episode. That is to say, even their present locality is far away and nearly iso-distantly distributed, these three porphyry Cu(Mo) deposits belong to the same mineralization episode at the end of Eocene.

关键词： Re-Os isotopic dating, porphyry Cu deposits, Cenozoic, mineralization episode.

SEDIMENTARY CHARACTERISTICS OF CONGLOMERATES IN THE JINGGU-ZHENYUAN BASIN,SOUTHWESTERN YUNNAN,CHINA AND THEIR TECTONIC IMPLICATIONS

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Scientia Geologica Sinica 1997年第2期 10-17页

作者： Liu Shanyin( beijing Graduate School, China University of Mining and Technology, beijing, 100083) Zhong Dalai and {2. {2. (institute of geology, Chinese Academy of Sciences, beijing, 10002.

ＳＥＤＩＭＥＮＴＡＲＹＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＣＯＮＧＬＯＭＥＲＡＴＥＳ桑危裕龋牛剩桑危牵牵眨冢龋牛危伲眨粒危拢粒樱桑危樱希眨裕龋祝牛樱裕牛遥危伲眨危危粒危茫龋桑危粒粒危模裕龋牛桑遥裕牛茫裕希危桑茫桑... 详细信息

ＳＥＤＩＭＥＮＴＡＲＹＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＣＯＮＧＬＯＭＥＲＡＴＥＳ桑危裕龋牛剩桑危牵牵眨冢龋牛危伲眨粒危拢粒樱桑危樱希眨裕龋祝牛樱裕牛遥危伲眨危危粒危茫龋桑危粒粒危模裕龋牛桑遥裕牛茫裕希危桑茫桑停校蹋桑茫粒裕桑希危覶XＳＥＤＩＭ?..

关键词：粒粒 BASIN,SOUTHWESTERN JINGGU-ZHENYUAN 桑希危危