Geochemical discriminations of sandstones from the Mohe Foreland basin,northeastern China: Tectonic setting and provenance   总被引：5，自引：0，他引：5  

Andrey A. Sorokin 《中国科学D辑(英文版)》2005,48(5):613-621

The Mohe region near the border area of China with Russia is in Heilongjiang Province. Topographically the area consists of lower mountains or hills situated at the northern end of the Da Hinggan Mountains. Struc-turally the Mohe basin rests on the north margin of the Ergun Block, and the Mongol-Okhotsk Orogen is lo-cated to the north of the basin. Due to poor access conditions and good vegetation coverage, previous researches on the basin are much weak with few spe-cial geological inves…  相似文献   

Discovery of double-peaking potassic volcanic rocks in Langshan Group of the Tanyaokou hydrothermal-sedimentary deposit,Inner Mongolia,and its indicating significance   总被引：2，自引：0，他引：2  

PENG Runmin  ZHAI Yusheng  WANG Zhigang & HAN Xuefeng . Key Laboratory of Lithospheric Tectonics  Lithoprobing Technology  Ministry of Education  China University of Geosciences  Beijing  China  . Inner Mongolia Geological Prospecting Institute  Ministry of Chemical Industry  Hohhot  China Correspondences should be addressed to Peng Runmin 《中国科学D辑(英文版)》2005,48(6):822-833

Since the mid-1980s,Tanyaokou large Zn-Cu-Fe sulfides deposit,located at the southwest end of Langshan-Zhaertaishan-Bayan Obo Mesoproterozoic metallogenic belt in the west section of the northern margin of the North China Platform[1?9](Fig.1),has been confirmed to be submarine volcanic exhalative-sedimentary metamorphosed deposit hosted in the miogeosynclinal mud-carbonaceous formation of the Langshan Group(LG)[1],or submarine volcanic exha-lative-deposition-altered deposit[2]or stratabo…  相似文献   

Prediction of permafrost distribution on the Qinghai-Tibet Plateau in the next 50 and 100 years   总被引：14，自引：0，他引：14  

NAN Zhuotong  LI Shuxun & CHENG Guodong State Key Laboratory of Frozen Soil Engineering  Cold  Arid Regions Environmental  Engineering Research Institute  Chinese Academy of Sciences  Lanzhou  China Correspondence should be addressed to Nan Zhuotong 《中国科学D辑(英文版)》2005,48(6):797-804

The Qinghai-Tibet Plateau(QTP)has the highestand largest permafrost coverage in the low-middlelatitudes all over the world.With the progress ofChina’s Western Development,human activities areincreasing significantly on the QTP.For instance,theQinghai-Tibet Railway project started in June2001iscurrently under construction,but permafrost problemwill be one of the critical factors for the engineeringconstruction.Frost heave and permafrost settlementmay destroy engineering construction[1,2]…  相似文献   

Magma underplating and Hannuoba present crust-mantle transitional zone composition: Xenolith petrological and geochemical evidence   总被引：7，自引：0，他引：7  

FAN Qicheng    ZHANG Hongfu  SUI Jianli  ZHAI Mingguo  SUN Qian & LI Ni . Institute of Geology  Geophysics  Chinese Academy of Sciences  Beijing  China  . Institute of Geology  China Seismological Bureau  Beijing  China 《中国科学D辑(英文版)》2005,48(8):1089-1105

Studies on the deep-seated xenoliths from global volcanoes reveal that the present petrological crust-mantle boundary between the lower crust and the upper mantle actually is a transitional layer from mainly mafic granulites to ultramafic spinel lher-zolites[1,2], i.e. a transitional zone distinctive from the seismological Moho[3]. Oceanic lithosphere crust- mantle transitional zone can be established from the study on the exposed ophiolites. However, as for the continental lithosphere, since …  相似文献   

Dehydration melting of solid amphibolite at 2.0 GPa: Effects of time and temperature   总被引：3，自引：0，他引：3  

ZHOU Wenge  XIE Hongsen  LIU Yonggang  ZHENG Xiaogang  ZHAO Zhidan & ZHOU Hui . Laboratory of Material in the Earth’s Interior  Institute of Geochemistry  Chinese Academy of Sciences  Guiyang  China  . Department of Geology  China University of Geosciences  Beijing  China  . Department of Geology  Peking University  Beijing  China 《中国科学D辑(英文版)》2005,48(8):1120-1133

The dehydration melting of the natural rock at high pressure is important to investigating the magma formation in the earth’s interior. Since the 1970s, a lot of geological scientists have paid more atten- tion to the dehydration melting of the natural rock[1―5]. Previous experiments of dehydration melting and observations of fieldwork argued that the dehy- dration melting of the rock was probably the most important fashion for the melting of the lower crust rock[6―12]. The genesis of most …  相似文献   

Silurian A-type granitoids in the southern margin of the Tongbai-Dabieshan: Evidence from SHRIMP zircon geochronology and geochemistry     

MA Changqian  SHE Zhenbing  XU Pin & WANG Lingyan State Key Laboratory of Geological Processes  Mineral Resources  and Faculty of Earth Sciences  China University of Geosciences  Wuhan  China 《中国科学D辑(英文版)》2005,48(8):1134-1145

The Dabieshan Orogenic belt is well known for the exhumation of early Mesozoic ultrahigh-pressure (UHP) metamorphic rocks and Jurassic–Cretaceous emplacement of voluminous granitoids. However, the tectonic evolution in the orogen during the Paleozoic, especially its magmatic response to tectonism has not received much attention. As indicated by published data, the Dabieshan orogenic belt contains different records of Paleozoic magmatic-tectonic association in different tectonic units. Occ…  相似文献   

Average slip rate,earthquake rupturing segmentation and recurrence behavior on the Litang fault zone,western Sichuan Province,China   总被引：3，自引：0，他引：3  

XU Xiwei  WEN Xueze  YU Guihua  ZHENG Rongzhang  LUO Haiyuan & ZHENG Bin . Institute of Geology  China Earthquake Administration  Beijing  China  . Earthquake Administration of Sichuan Province  Chengdu  China 《中国科学D辑(英文版)》2005,48(8):1183-1196

The Litang fault zone (LFZ) is an important active fault within the northwestern Sichuan sub-block. To-gether with the Garzê-Yushu, Xianshuihe, and An-ninghe fault zones on its northern, eastern and south-eastern sides, the LFZ constitutes the lateral extrusion tectonic system in the southeastern part of the Qing-hai-Tibetan Plateau[1,2] (Fig. 1). According to instru-mental records, historical recordings and field investi- gation, an earthquake (Ms7.3) occurred on its middle to south se…  相似文献   

Cataclastic rheology of carbonate rocks     

LU Xiancai  SUN Yan  SHU Liangshu  GU Lianxing  GUO Jichun & ZHU Wenbin State Key Laboratory of Mineral Deposits Research  Department of Earth Sciences  Nanjing University  Nanjing  China 《中国科学D辑(英文版)》2005,48(8):1227-1233

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Adjoint method for the optimum planning of industrial pollutant sources     

LIU Feng    HU Fei & ZHU Jiang . College of Environmental Sciences  Peking University  Beijing  China  . LAPC  Institute of Atmospheric Physics  Chinese Academy of Sciences  Beijing  China 《中国科学D辑(英文版)》2005,48(8):1270-1279

The deterioration of air quality is threatening the life and health of people. Scientists in China and other countries have done a great deal of research work on the details of air pollution and the methods of preven-tion and control during the past decades. Up to now, most of the achievements are concentrated on the techniques of controlling pollutant sources and the programs of reduction, which focus on the improve-ment of air quality and the restoration of environment. The techniques of con…  相似文献   

Earthquake-controlled event deposits and its tectonic significance from the Middle Permian Wandrawandian Siltstone in the Sydney Basin,Australia   总被引：3，自引：0，他引：3  

DU Yuansheng  G. R. Shi  & GONG Yiming . Faculty of Earth Sciences  China University of Geosciences  Wuhan  China  . School of Ecology  Environment  Deakin University  Victoria  Australia 《中国科学D辑(英文版)》2005,48(9):1337-1346

Earthquake is a disaster event resulting from rapid and intensive crustal vibration caused by fault activity, volcanic eruption, or block dilapidation. Heezen and Ewing[1] and Heezen and Dyke[2] were the first to note earthquake-related mass movement and associated deposits in connection to the turbidity currents and submarine slumps triggered by the Grand Bank Earthquake in 1929. Seilacher[3] defined redeposited sedimentary beds, disturbed and modified by earth- quakes, as seismite. Since t…  相似文献