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A New Idea of Sinian Doushantuo'an Metaphyte Fossils from Xiuning, Anhui Province

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Acta Geologica Sinica(English Edition) 1997年第4期71卷 491-501,515-517页

作者： Tang Feng, National geological Museum of China, Xisi, Beijing 100034Yin Chongyu and Gao LinzhiInstitute of Geology, Chinese Academy of geological Sciences, 26 Baiwanzhuang, Beijing 100037 Fei Zhenbi National geological Museum of China Xisi Beijing 100034 Institute of Geology Chinese Academy of Geological Sciences 26 Baiwanzhuang Beijing 100037 [?]Tang Feng Born in 1965 graduated from the Department of Earth Sciences Nanjing University in 1987 got his master degree at the Chinese Academy of geological Sciences in 1993. Now he is associate research professor of the National geological Museum of China and engaged in the study of Precambrian stratigraphy and palaeontology.

This paper gives a summary of the fossil data from the Sinian Doushantuo' an Lantian Formation in the Xiuning area, Anhui Province, China, and reports the genital butt structure comparable to that of some modern advanced algae and the fossil structure comparable to the dehiscence of sporangia as well as the ontogenetic phenomenon occurring possibly from the formation of embryos by zygote germination to the production of sessile benthonic algal adults. This phenomenon furnishes a useful clue to the further study of the life history of alternate generations in advanced algae and provides megafossil evidence for the sex differentiation of metaphytic algae.

关键词： Doushantuo' an stage metaphyte fossil reproductive structure alternation of generations Xiuning Anhui

Outcrop Sequence Stratigraphy of Neoproterozoic in Hunjiang Area, Jilin Province

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Journal of Earth Science 1996年第1期15卷 20-28页

作者： Qiao Xiufu Gao Linzhi (Institute of Geology, Chinese Academy of geological Sciences, Beijing 100037)

Three depositional sequences have been recognized in the Neoproterozoic of southern Jilin. In this paper, we focus discussion on the parasequences and their stacking patterns in Wanlong, Badaojiang and Qinggouzi formations and on their diachronism by the theory of sequence stratigraphy, event stratigraphy and chronostratigraphy. The authors advance a new comparison of the Neoproterozoic between Jilin and Liaoning provinces.

关键词： Neoproterozoic sequence stratigraphy parasequence onlap Jilin Province.

Rheological Simulating Study of Mechanical Conditions for Syn-extensional Basin and Mountain Coupling System

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Journal of China University of Geosciences 2003年第4期14卷 330-338页

作者： Wu Hongling Yin Xiulan Institute of Geomechanics, Chinese Academy of geological Sciences, Beijing 100081 Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081

This article gives a mechanical model, in which the layers of lithosphere are assumed to be the creep materials, to study the coupling mechanism of a syn-basin-mountain system quantitatively by using the numerical simulating method. A geological dynamic extensional mode given by some geologists is theoretically discussed and verified. The study shows that lithosphere thickening or thinning is closely related to the thermal activity, or in other words, thermal convection beneath the lithosphere. It is one of the important factors affecting the formation of the basin-mountain coupling system. As an essential condition, only the upward buoyant force and the horizontal dragging force caused by the thermal convection jointly act on the bottom of the lithosphere, the stress and strain states in rock's layers are advantageous to forming the tectonic-landforms of the basin-mountain coupling system. A study on the creep features of the lithosphere shows that the stress and strain in the rock's layers vary with time when the lasting forces act on the boundary. They increase rapidly at initial stage and decrease steadily after reaching the peak value. Phenomena of stress relaxation are significant for studying the tectonic evolution.

关键词： lithosphere thinning basin-mountain system dynamic mechanism creep numerical simulating method.

Storm Deposits of the Sinian Zhangqu Formation in Northern Anhui——An Upward Shallowing Carbonate Sequence

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Acta Geologica Sinica(English Edition) 1990年第2期64卷 129-145,234-235页

作者： Qiao Xiufu Xing Yusheng Gao Linzhi Yin Chongyu Yue Zhao Liu Guizhi Institute of Geology, Chinese Academy of geological Sciences, Beijing Jia Zhongpeng Gao Linzhi Chinese Academy of geological Sciences Beijing

This paper studies. for the first time, the storm deposits of a carbonate sequence in the Sinian ZhangquFormation in northern Anhui. In the formation. a great number of calcareous trider sponge spicules were dis-covered in a distal storm turbidity sequence, which have provided further evidence for the correlation of theSinian Systems in North and South China from a view point of palaeontology.

关键词： Zhang Storm Deposits of the Sinian Zhangqu Formation in Northern Anhui An Upward Shallowing Carbonate Sequence

The Discovery of Phlogopite Exsolution Lamellae in Garnets of Eclogite Inclusions, Liaoning Province

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Acta Geologica Sinica(English Edition) 1997年第1期71卷 33-42页

作者： Zhou Xiuzhong Institute of Mineral Deposits, Chinese Academy of geological Sciences, Beijing Liu Xinzhu Institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing [?]Zhou Xiuzhong Born in May 1939 graduated from Specialty of Geology and Prospecting of Metallic and Nonmetallic Minerals Beijing College of Geology in 1964. She is now Associated Research Professor in the Institute of Mineral Deposits CAGs and has long been engaged in researches on mineralogy and petrology.

In No. 50 kimberlite pipe of Fuxian County, Liaoning Province, an eclogite inclusion(nodule), which is extremely rare in kimberlites, was discovered and phlogopite exsolutionlamellae were found in garnets of the inclusion. Microscopic, TEM and energy spectral observa-tions and studies confirmed that these lamellae are phlogopite. They are colourless and acicularin section, generally 0.5-5μm in width and 10-100μm in length. Nevertheless, fine lamellae,0.05-0.1μm wide and 1-2μm long, are also well developed. Along [111] of the garnet, three setsof phlogopite lamellae show oriented arrangement approximately at angles of 60°-70°, indi-cating that these lamellae might be the product of exsolution from garnet as a result ofpressure-release when eclogite ascended from the relatively deep level to the relatively shallowlevel of the mantle. Tiny acicular exsolution minerals (or inclusions) are commonly found ingarnet and pyroxene in eclogite inclusions of kimberlites all over the world and it has been re-ported that the identified exsolution minerals include pyroxene and rutile. This is the first timethat phlogopite exsolution lamillae were found in eclogite inclusions in the world.

关键词： eclogite garnet phlogopite exsolution lamellae Liaoning Province

survey and Protection for geological Heritage Resources of Water Landscape in Yandangshan Global Geopark

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地学前缘 2009年第S1期16卷 292-292页

作者： Meijun Chen Zhejiang Institute of geological survey,Xiaoshan 311203,China.

The geological heritage resource of water landscape in Yandangshan Global Geopark consists of 5 subclasses and 9 types,which cover more than 20 geological heritage *** Dalongqiu Waterfall that is one of the four most ... 详细信息

关键词： geological heritage survey and protection water landscape Yandangshan Global Geopark

Mineralization Ages of the Jiapigou Gold Deposits,Jilin

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Acta Geologica Sinica(English Edition) 1997年第2期71卷 180-188页

作者： Li Junjian Shen Baofeng Mao Debao Li Shuangbao Zhou Huifang and Cheng Yuming Tianjin Institute of Geology and Mineral Resources,Chinese Academy of geological Sciences, Tianjin Nonferrous Metal geological Exploration Bureau, Changchun, Jilin Tianjin Institute of Geology and Mineral Resources Chinese Academy of Geological Sciences Tianjin Nonferrous Metal geological Exploration Bureau Changchun Jilin [?]Li Junjian Born in Peixian Jiangsu in January 1962 graduated from the Department of Geology Nanjing University. Now he is associated research professor at the Tianjin Institute of Geology and Mineral Resources Chinese Academy of Geological Sciences and mainly undertakes the study of Precambrian geology and mineral deposits.

The Jiapigou gold deposits are typical vein type deposits associated withArchaean greenstone belts in China. According to the crosscutting relationships between dykesand auriferous veins, single hydrothermal zircon U-Pb dating and quartz K-Ar,^(40)Ar-^(39)Ar andRb-Sr datings, the main mineralization stage of the Jiapigou deposit has been determined to be2469-2475 Ma, while mineralization superimposition on the gold deposit occurred in1800-2000 Ma and 130-272 Ma. They form a mineralization framework of one oldermetallogenic epoch (Late Archaean-Early Proterozoic) and one younger metallogenic epoch(Mesozoic) of gold deposits in Archaean greenstone belts in China.

关键词： mineralization age hydrothermal zircon gold deposit Jiapigou Jilin

Historical　seismicity　of　South　China　from　European　sources：example　of　the　Hong　Kong　Newspaper　Press

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Acta Seismologica Sinica(English Edition) 1995年第3期8卷 487-490页

作者： R. M. W. MUSSON(British geological survey, West Mains Road,Edinburgh EH9 3LA, UK) 1. British geological survey West Mains Road EH9 3LA Edinburgh UK

The study of historical earthquakes, essential for seismic hazard in most parts of the world,is as much an undertaking in history as it is in seismology. Many early studies of historical earthquakes in various parts of the world were done by seismologists untrained in historical methods,and numerous errors have resulted from *** aspect of historical methodology that cannot be stressed too highly is the proper assemblyand critique of source materials. In the case of many parts of the world outside Of Europe,colo-nial records are a major source Of data-for example,for the West indies the principal sourcesof data are not to be found in the West indies themselves but in the archives of ports which traded to the West Indies.

关键词： historical earthquake South China

SHRIMP Dating and Recrystallization of Metamorphic Zircons from a Granitic Gneiss in the Sulu UHP Terrane

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Acta Geologica Sinica(English Edition) 2004年第1期78卷 146-154页

作者： LI HongyanInstitute of Mineral Resources, Chinese Academy of geological Sciences, Beijing 100037 Geosciences Rennes, Universite de Rennes 1, 35042 Rennes Cedex, France Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 Géosciences Rennes Université de Rennes 1 35042 Rennes Cedex France *Correspondence: LI Hongyan *Correspondence: E-mail: hyli@***

An unusual zircon SHRIMP dating result of a granitic gneiss from the Qinglongshan eclogite-gneiss roadcut section is presented in this paper. The very peculiar and complicated internal structures, as well as the very low Th/U ratios (0.01-0.08) of the zircons indicate that they were formed by metamorphic recrystallization. Strongly in contrast with previously published zircon U-Pb ages of the Dabie-Sulu UHP metamorphic rocks where protolith ages of 600-800 Ma are commonly recorded, only metamorphic age of 218±5 Ma, defined by 18 analytical spots either in rim or in core of zircons, are recorded in this granitic gneiss. This age represents the time of the complete metamorphic recrystallization overprint on primary magmatic zircons. The recrystallization was derived by the UHP metamorphism, and was strengthened by the early stage of retrograde metamorphic fluid activity.

关键词： recrystallization of zkcon metamorphic fluid SHRIMP dating granitic gneiss Qinglongshan Sulu China