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Acta Geologica Sinica(English Edition) 2000年第2期74卷 176-182页

作者： zheng xiangshen SANG Haiqing QIU Ji LIU Jiaqi LEE Jong Ik KIM Hyeoncheol Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China Polar Research Center Korea Ocean Research and Development InstituteSeoul 425-600Korea

Ages determined with the 40Ar/39Ar isotopic system affirms the Early Cretaceous volcanic activity in the Barton Peninsula, King George Island, Antarctica. Two specimens of basaltic andesite collected from the lower-most volcanic sequence of the peninsula were irradiated and analyzed in different experiments, yielding an identical age spectrum, and two magmatic thermal events of the Early Cretaceous (120.4±1.6 Ma, 119±1 Ma) and Early Tertiary (53.1±1.5 Ma, 52±1 Ma) are distinguished. The former is interpreted to represent the primary cooling age of basaltic andesite, whereas the latter is the thermal reset age caused by the intrusion of granitic pluton. These new ages clearly indicate that volcanism was active during the Early Cretaceous on the Barton Peninsula and that intensive hydrothermal alteration and mineralization of Mesozoic volcanic rocks resulted from Tertiary magmatism.

关键词： Antarctica Barton Peninsula volcanic rocks ^(40)Ar/^(39)Ar age

PETROCHEMICAL CHARACTERISTICS AND TECTONIC SETTING OF THE GRAY GNEISSESIN NORTH DABIE TERRANE

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Scientia Geologica Sinica 1998年第4期 527-538页

作者： zheng xiangshen Jin Chengwei Zhai Mingguo and Shi Yonghong(Institute of geology, Chinese Academy of Sciences Beijing 100029)

Gray gneiss is the principle component of the north Dabie metamorphic complex. On SiO2 variationdiagram most of major oxide display a smooth trend from tonalitic gneiss to trondhjemitic or granitic rocks,implying a magmatic differentiation model for the origin of the gray gneiss. Gray gneisses have lower ΣREE content with low grade fractionation of light REE/heavy REE. All rocks are enriched in large ionlithophile elements and depleted in high field strength elements and Nb. More basic rocks have highercontents of Cs, Ba, Rb and Sr and less depletion of Nb and Ti compared with meta-granitoids. Theincreasing of Nb depletion, the decreasing of Sr enrichment, and the transitional metal element Tibecoming greatly depleted with the increase of the SiO2 in rocks imply the fraction ofmafic minerals andplagioclase. Major element and trace element discriminations provide that the gray gneiss is of the calcalkaline association formed in a volcanic arc. The forming process of the gray gneiss is closely related to acollisional events. From the subduction before collision, through post-collision uplift, to late orogenicstage, the composition of the gray gneisses was evolving continuously. PetTochemical and geochemicalcharacteristics of the gray gneiss further strengthen the hypothesis that the Northern Dabie Terrain is apossible Andean-type arc.

关键词： Wang UHP Zhang PETROCHEMICAL CHARACTERISTICS AND TECTONIC SETTING OF THE GRAY GNEISSESIN NORTH DABIE TERRANE high

SYSTEMATIC COVARIATION OF SR, BA, CA ELEMENTS IN CENOZOIC VOLCANIC ROCKS ON THE FILDES PENINSULA, WEST ANTARCTICA, AND ITS RELATION TO PEIROGENESIS

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Chinese Journal of Polar Science 1991年第1期2卷 30-38页

作者： zheng xiangshen and Liu XiaohanLaboratory of Lithosphere Tectonic Evolution,Institute of Geology, Academia Sinica,P.O. Box 634, Beijing 100029

Cenozoic volcanic rocks in the Fildes Peninsula are composed of High-Al basalt, basaltfc andesite, andesite, and dacite belonging to a calc-alkaline volcanic series with low-K and high-Al characteristics. Using a new indicator, the Sr / Ca-Ba / Ca, systematics proposed by Onuma (1980, 1981) and Sr, Ba, Ca concentrations in volcanic lavas and subvolcanic rocks, the authors find that the high-Al basaltic volcanic rocks either in volcanic strata or in subvolcanic intrusives were formed from a primary magma, in different stages through the fractional crystallization of clinopyro-xene(Cpx)and plagioclase (P1) in the process of magmatic evolution, resulting in the formation of basaltic-andesitic, andesitic and dacitic rocks.

关键词： Fildes Peninsula Cenozoic volcanic rocks Sr / Ca-Ba / Ca systematics

GEOLOGY OF FILDES PENINSULA, KING GEORGE ISLAND, WEST ANTARCTICA——A Study on the Stratigraphy and Volcanism

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Chinese Journal of Polar Science 1990年第1期1卷 8-19页

作者： zheng xiangshen and Liu XiaohanLaboratary of Lithosphere Tectonic Evolution Institute of Geology, Academia Sinica, P.O. Box 634, Beijing 100029

On the basis of the geological mapping, isotopic choronoogcal and petrological evidences, the authors suggested that the early Tertiary volcanic strata in the Fildes Peninsula could be divided into two formations and four members. The erupted centers in the peninsula were gradualy migrating from the western coast to the eastern and the subvolcanic intrusives were regularly distributed along a series of NWW-SEE trending faults. All of these were basically formed in two stages of volcanic activities from Paleocene to Eocene.

关键词： Volcanic stratigraphy Volcanism Fildes Peninsula West Antarctica.

SM-ND ISOCHRON AGE AND SOURCE CHARACTERS OF THE GRAY GNEISSES IN NORTH DABIE TERRAIN

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Scientia Geologica Sinica 2000年第2期 165-171页

作者： zheng xiangshen Jin Chengwei and Zhai Mingguo (Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029) Shi Yonghong (Anhui Institute of Geotogy Hefei 230001)

The North Dabie Metamorphic Complex （NDC） is a suite of gray gneiss, mainly of tonalitic ***-Nd isochron age of 1047±44.5Ma, εNd =-8.99 and γ=0.998 are obtained. Nd model ages （TDM） and Pb model ages also indicate an ancient crust-derived source for the gray gneisses. Either the 87Sr/86Sr present ratios （>0.707） and the present εNd value （-8.84-23.56）, or the εNd value （-8.99） determined by isochron clearly constrained a crust source for the gray gneisses in NDC. Hence it can be inferred that the gray gneisses of NDC were derived from a reworking ancient middle to lower continental crust The generation and evolution process is closely related to the subduction of the Yangtze plate beneath the North China plate. The intrusion of the Yanshan granitic magma caused the last and the strongest tectothermal even on the gray gneisses

关键词： Pb Wang SM-ND ISOCHRON AGE AND SOURCE CHARACTERS OF THE GRAY GNEISSES IN NORTH DABIE TERRAIN high ND

PALEOMAGNETISM OF THE LATE CRETACEOUS AND EARLY TERTIARY ROCKS FROM FILDES PENINSULA,WEST ANTARCTICA, AND ITS GEOTECTONIC SIGNIFICANCE

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Chinese Journal of Polar Science 1992年第1期3卷 40-49页

作者： Liu Chun, Zhu Rixiang, zheng xiangshen, Liu Xiaohan Jin Zengxin, Feng YuInstitute of Geology, Academia Sinica,Beijing, 100029 Institute of Geophysics, Academia,Sinica,Beijing, 100101

The paleomagnetis m of 109 oriented samples collected from drill cores through 5 rock units of Late Cretaceous and Early Tertiary on Fildes Peninsula were systematically studied-According to the study, the paleomagnetic pole position of this area is different from the position of Australia during the 55-45 Ma period. This means that when the break - up of the Gondwanaland at 55 - 45 Ma ago, Australia was separated from the Gondwanaland, drifting southward 20°-30°Lat. and rotating 70°-80°westward and then gradually arriving at recent position . The paleolatitudinal data indicate that it is not impossible that the area studied was covered with land glacier at that time. The apparent polar wander path of Antarctica through the geological time are also roughly worked out.

关键词： Fildes Peninsula paleomagnetic pole position tectonic displacement apparent polar wander path.

大别造山带花岗岩类和正片麻岩的Rb/Sr分区

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岩石学报 2000年第3期16卷 420-424页

作者：金成伟郑祥身中国科学院地质与地球物理研究所北京100029

根据花岗岩类和片麻岩的 Rb/ Sr比值和其他岩相学和地球化学性质 ,大别造山带可以分为下列四个带 :(1)北大别北带 :是一个灰色片麻岩和基性、超基性岩带 ,其灰色片麻岩的 Rb/ Sr比值为 0 .0 1～ 0 .0 9;(2 )北大别南带 :为中酸性岩浆活... 详细信息

根据花岗岩类和片麻岩的 Rb/ Sr比值和其他岩相学和地球化学性质 ,大别造山带可以分为下列四个带 :(1)北大别北带 :是一个灰色片麻岩和基性、超基性岩带 ,其灰色片麻岩的 Rb/ Sr比值为 0 .0 1～ 0 .0 9;(2 )北大别南带 :为中酸性岩浆活动和强烈混合岩化的区域 ,其片麻岩的 Rb/ Sr比值为 0 .11～ 0 .40 ,花岗岩类为 0 .3～ 0 .9;(3)南大别带 :为一构造混杂带 ,超高压变质作用和岩浆活动和混合岩化均有发育的区域 ,其花岗岩类的 Rb/ Sr比值为 0 .0 5～ 0 .0 7;(4 )沿江带 :为片麻状花岗岩和片麻岩分布区 ,其片麻状花岗岩的 Rb/ Sr比值为 0 .0 4～ 0 .2 7。

关键词：大别造山带花岗岩类正片麻岩铷/锶比值

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大别岳西地区花岗岩类岩石学及其成因

岩石学报 1998年第4期14卷 493-502页

作者：金成伟郑祥身中国科学院地质研究所

岳西地区花岗岩类主要由主簿原和白马尖二长花岗岩－正长花岗岩岩基、花岗闪长岩－石英二长闪长岩小岩体和晚期的淡色碱长花岗岩岩体组成。主要岩体形成于燕山晚期，为造山后花岗岩。岩基中花岗岩的暗色矿物为黑云母，主簿原花岗岩含有... 详细信息

岳西地区花岗岩类主要由主簿原和白马尖二长花岗岩－正长花岗岩岩基、花岗闪长岩－石英二长闪长岩小岩体和晚期的淡色碱长花岗岩岩体组成。主要岩体形成于燕山晚期，为造山后花岗岩。岩基中花岗岩的暗色矿物为黑云母，主簿原花岗岩含有褐帘石，岩石化学显示为过铝质（Ａ／ＣＮＫ约为１．１），稀土配分为右倾的、中等负铕异常（Ｓｍ／Ｅｕ为０．１６～０．２５）曲线。花岗闪长质的、没有变形的小岩体中普遍含有角闪石和榍石，岩石化学表现为准铝质（Ａ／ＣＮＫ为０．８～０．９，Ａ／ＮＫ为１．５～１．８），稀土配分为右倾的无铕异常（或略有正铕异常）的曲线，但其形成时代和εＮｄ（０）值与主要岩基相同。花岗岩类的εＮｄ（０）值均为较大的负值（－１７～－２６），在εＮｄ（０）－εＳｒ（０）图上，表现为一条水平带状分布，显示其源岩为存留时间很长的古老地壳。

关键词：花岗岩类岩石成因岩石学岳西地区大别山

中国东北一套富钾火山熔岩——白榴石岩、白榴石粗面岩、白榴石响岩

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吉林地质 1984年第4期 19-25页

作者：郑祥身沈远超翟明哲中国科学院地质研究所

我国著名的活火山之一,东北的五大莲池火山群以其保存完好的熔岩地貌,甘美爽口的矿泉和优雅秀丽的景色为世人所向往,具独特的富钾火山熔岩更吸引岩石工作者的关注。本文就五大莲池及毗邻地区所产的一套富钾火山熔岩的归属问题给出一管之... 详细信息

我国著名的活火山之一,东北的五大莲池火山群以其保存完好的熔岩地貌,甘美爽口的矿泉和优雅秀丽的景色为世人所向往,具独特的富钾火山熔岩更吸引岩石工作者的关注。本文就五大莲池及毗邻地区所产的一套富钾火山熔岩的归属问题给出一管之见,以期引起人们的重视和讨论。 (一) 由于环太平洋火山带的作用,东北地区新生代火山岩十分发育。据现有资料,产于辽宁宽甸、吉林敦化、黑龙江镜泊湖以及大兴安岭的新生代火山岩,基本为碧玄岩——碱性橄榄玄武岩;在长白山天池,岩石组合为橄榄玄武岩——碱性粗面岩——碱流

关键词：火山熔岩五大莲池白榴石响岩岩石化学成分粗面岩东北中华人民共和国

西南极利文斯顿岛晚三叠世遗迹化石及其环境意义

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地质科学 2000年第4期35卷 422-431页

作者：邓希光郑祥身刘小汉杨式溥中国科学院地质研究所岩石圈构造演化开放研究实验室北京100029 中国地质大学北京100083

西南极利文斯顿岛晚三叠世迈尔斯陡崖组形成于海底浊积扇中扇的上、下部分 ,发育着许多海相遗迹化石。在采集到的样品中鉴定共有 1 5个遗迹属、1 6个遗迹种 ,其中有1 0个可以鉴定到遗迹种、两个比较种 ,4个只鉴定到遗迹属 ,未鉴定到遗迹... 详细信息

西南极利文斯顿岛晚三叠世迈尔斯陡崖组形成于海底浊积扇中扇的上、下部分 ,发育着许多海相遗迹化石。在采集到的样品中鉴定共有 1 5个遗迹属、1 6个遗迹种 ,其中有1 0个可以鉴定到遗迹种、两个比较种 ,4个只鉴定到遗迹属 ,未鉴定到遗迹种 ;并建立了 1个新遗迹属及新遗迹种是文献中从未发现的。除新遗迹属种外 ,其余 1 4个遗迹属 ,1 5个遗迹种都曾经在深海相浊积岩内发现过 ,Belorhaphe、Glockerichnus、L ophoctenium、Rhabdoglyphus、Pale-odictyon、Sublorenzinia、Spirophycus、Strobilorhaphe、Tuberculichnus、Cochlichnus等属于浊流前产生在深海相泥岩内的高度分异的雕画迹 (Graphoglyptida) ,它们产于泥岩却保存为上覆砂岩底面的铸型凸起。Fucusopsis和 N eonereites却产生在砂岩内代表浊流后形成的沉积后遗迹组合。这些遗迹化石属深水的 Nereites遗迹相。

关键词：遗迹化石晚三叠世利文斯顿岛西南极沉积环境