检索结果-南通市图书馆

metallogenic characteristics of epithermal gold deposits in Tianshan, Xinjiang, China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第S2期44卷 138-139页

作者： FENG Jianzhong~1, FU Shuixing~2, WU Dewen~3 and YANG Zian~3 1. Department of Geology, Peking University, Beijing 100871, China 2. Beijing Institute of Geology for Mineral Resources, Beijing 100012, China 3. Center of Remote Sensing for Geology, CNNC, Beijing 101601, China Department of Geology Peking University Beijing 100871 China Beijing Institute of Geology for Mineral Resources Beijing 100012 China Center of Remote Sensing for Geology CNNC Beijing 101601 China

TIANSHAN in southern Xinjiang belongs to the Paleozoic island arc system in which volcanic rocks are extensively distributed. A series of epithermal gold deposits such as the Axi, Xitan, Cuiling andShuangfengshan gold deposits have been discovered. 1 Geological settings of epithermal gold deposits in Tianshan, southern Xinjiang Tianshan in southern Xinjiang belongs to the Paleozoic island arc system. To its north is the Kazakhstan plate, and to its north is the Tarim plate. From west to east, the tectonic units are characterizedby Yili island arc, southern Tianshan arc-basin, Jiaoluotage island arc and Xingxingxia island arc. TheEW-trending Tianshan ore belt is controlled by Kanggurtag geosuture. In its west part, it is controlled byShenglidaban geosuture. The linear structure is NNW-trending; from north to south, the faults

关键词： metallogenic characteristics gold deposits Tianshan Xinjiang.

metallogenic dynamics of the Yimen-type copper deposits and prediction of concealed ores

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第S2期44卷 250-252页

作者： HAN Rensheng~1, SUN Jiacong~1, GU Xiaochun~2, LI Jun~1, LI Yuan~1, LI Wei~1 and MA Deyun~1 1. Kunming University of Science and Technology, Kunming 650093, China 2. Yimen Mining Bureau, Yimen 651101, China Kunming University of Science and Technology Kunming 650093 China Yimen Mining Bureau Yimen 651101 China

1 Geology and origin of the Yimen-type copper deposits THE Yimen copper mining district is located in a rift environment on the margins of the Yangtze continent and occurs in the middle segment of the Wuding-Yimen-Yuanjiang fault depression zone in theProterozoic Kunyang rift, with the Lujijiang fault as the boundary in the west and the Luoci-Yimen faultas the boundary in the east, and in the north it borders on the Luwu copper ore field and in the south itlinks with the Yuanjiang copper deposit, thus constituting an SN-striking elongated basin. Exposed in themining district are mainly the Heishantou, Dalongkou, Meidang, Yingming, Luoxue, Elachang and Lujijiang formations of the Early-Middle Proterozoic Kunyang Group, constituting a suite of lightly metamorphic rocks of low greenschist facies, and locally the Debadu Formation-complexes of the Early Proterozoic-Archean Dahongshan Group. The mining district can be divided into two ore zones: the east ore zone andthe west ore zone. Mainly distributed in the west ore zone are the volcano-sedox-strongly reworked-deepsource superimposed-type ( Fengshan-type) ore deposits, including the Sanjiachang ( including theShishan and Fengshan copper deposits), Yiduochang, Elachang, Tianxing and Meishan copper deposits(occurrences) which are all designated to the typical Yimen-type copper deposits. In the east ore

关键词： metallogenic dynamics prediction of concealed ores Yimen-type copper deposits.

metallogenic characteristics of epithermal gold deposits in China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第S2期44卷 136-138页

作者： FENG Jianzhong~1 and WANG Jingbin~2 1. Department of Geology, Peking University, Beijing 100871, China 2. Beijing Institute of Geology For Mineral Resources, Beijing 100012, China Department of Geology Peking University Beijing 100871 China Beijing Institute of Geology for Mineral Resources Beijing 100012 China

VOLCANIC-SUBVOLCANIC rocks are extensively distributed in China, in which a series of epithermal golddeposits related to volcanism have been discovered. 1 metallogenic tectonic settings of epithermal gold deposits The epithermal gold deposits are mainly formed under the following tectonic settings: (i) ancient island arc collision, such as Xingxingxia island arc, Armantai island arc, Beishan island arc and Jueluotage island arc, etc. in periphery of Gunggar, Altai, Baishan, etc. in ancient Europe domain; (ii) extension area of continental margin of back arc, such as Fujian, Zhejiang, Jiangsu and Henlongjiang, *** circum-Pacific metallogenic domain; (iii) Mesozoic-Cenozoic island arc, such as the Tethys-Himalayametallogenic domain and Taiwan; (iV) intracontinental faulting depression or intraplate deep-seatedfaults, such as northern Hebei, Liaoning, Inner Mongolia at the north margin of the North China platformand periphery of Taicheng-Loujiang fault.

关键词： metallogenic characteristics gold deposits China.

Diagenetic-metallogenic ages of pyritic cherts and their implications in Mojiang nickel-gold deposit in Yunnan Province,China

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2001年第21期46卷 1823-1827页

作者： FANG Weixuan HU Ruizhong XIE Guiqing SU Wenchao QI Liang Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550002China Northwest Geological Exploration Bureau Chinese National Nonfer-rous Metal CorporationXi’an 710054China

Diagenetic-metallogenic ages of pyritic cherts formed by the syn-sedimentation of hydrothermal vent and ages of the Jinchang Rock Formation in the Mojiang large nickel-gold deposit in the Ailaoshan gold metallogenic belt have been discussed on the basis of chronology of isotopic geochemistry. Nickel-gold-bearing pyritic cherts in the mining were formed by syn-sedimentation of hydrothermal vent in the Late Devonian, i.e. age by Sm-Nd isochronal method (t) = (358±8.6) (2σ) Ma and age by Rb-Sr isochronal method (t) = (354.7±0.72) (2σ) Ma. On the other hand, deep-water cherts from the Jinchang Rock Formation of the Upper Devonian in the area were initiated at the same time; that is, age by Sm-Nd isochronal method (t) = (359(+21) (2(7) Ma and age by Rb-Sr isochronal method (t) = (358.02±0.30) (2σ) Ma.

关键词： metallogenic age age by Sm-Nd isochronal method age by Rb-Sr isochronal method Mojiang nickel-gold deposit.

The metallogenic models of gold deposits of quartz vein type and altered rock type

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1996年第2期41卷 142-144页

作者：孟良义李绪俊 Department of Geology Changchun University of Earth Sciences Changchun 130026 China

metallogenic models of gold deposits of quartz vein type and altered rock type will be dis-cussed in this note. They are considered to be closely related to granite spatially andgenetically.

关键词： quartz vein type altered rock type gold deposit metallogenic model.

PROPERTY AND metallogenic CHARACTERISTICS OF ALKALI-RICH PORPHYRY IN WESTERN MARGIN OF YANGTZE PLATFORM

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 1998年第2期10卷 57-60页

作者： Hu Xiangzhao (College of Resources, Environment and Civil Engineering,Central South University of Technology, Changsha 410083, China) College of Resources Environment and Civil Engineering Central South University of Technology Changsha 410083 China

The age of alkali rich porphyries in the western margin of Yangtze Platform is 30—50 Ma; the minerals mainly are orthoclase, quartz, plagioclase; the chemical composition is alkali rich [(K 2O+Na 2O)>8%],high potash[(K 2O+Na 2O)=5.09%-8.30%]; the content of  REE  is relatively low, LREE is concentrated, without anomaly of europium; the average initial ratio of 87 Sr/ 86 Sr is 0.7073; the value of δ 34 S similar to that of the meteoritic sulfur; the ratio of Pb isotope corresponds to that of upper mantle; metallogenic types belong to Cu, Mo, Au, Ag, Pb, Zn polymetal mineralization and rare, rare earth metal mineralization.

关键词： petrology geochemistry alkali rich porphyry metallogenic characteristics

STUDY ON metallogenic COUPLEZONE(MCZ)DYNAMICS IN ZHEJIANG

在线全文

学校读者我要写书评

暂无评论

Journal of Central South University 1996年第1期8卷 25-28页

作者： Wang Dawei Zhang Jiachun(Department of Geology, Central South University of Technology,Changsha 410083, China) Department of Geology Central South University of Technology Changsha 410083 China

The authors first put forward the concept of metallogenic couplezone(MCZ) through the research on metallogenic zones in Zhejiang. Different features of the metal and nonmetal MCZ in Zhejiang are studied. MCZ model which is related to geodome and Diwa series is established. The author thinks that MCZ dynamic characteristic is related with crustobody dynamics, and controlled by magmatic, volcanic and structural activity zoning.

关键词： metallogenic couplezone dynamics Zhejiang

Lead-Zinc-Silver metallogenic Prediction Based on Weights of Evidence Approach:A case Study in Tuotuohe Region,Qinghai,China

在线全文

学校读者我要写书评

暂无评论

地学前缘 2009年第S1期16卷 177-178页

作者： Yan Sun~(1,2,3),Xunlian Wang~3,Jianping Chen~(1,2,3),Qian Wang~(1,2,3) 1.Institute of High and New Techniques Applied to Land Resources,China University of Geosciences(Beijing),Beijing 100083, China. 2.Beijing Key Laboratory of Development and Research for Land Resources Information,China University of Geosciences (Beijing),Beijing 100083,China 3.School of Earth Sciences and Resources,China University of Geosciences(Beijing) Beijing 100083,China

Tuotuo River region(E91°-E93°,N33°-N 35°) is located in southwest Qinghai Province,*** lies in one of the most important metallogenic belts in China—Northwest Sanjiang metallogenic Belt,due to which Tuotuo River region can be of very high metal mineral potential not only in Qinghai Province but also *** this research,multisource data sets including geological,geochemical,geophysical, and remotely sensed images were integrated for mineral potential analysis with GIS *** the guidance of regional metallogenic features and deposit-forming geologic anomaly theories,evidential layers were obtained from these sets,which

关键词： Sanjiang metallogenic belt Tuotuo River lead-zinc-silver GIS Weights of Evidence minerogenic prediction

The metallogenic epoch and ore-forming metal source of some large and superlarge deposits in Laojunshan, Yunnan——Evidence from Rb-Sr isotopic studies

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第S2期44卷 30-32页

作者： LIU Yuping~1, LI Chaoyang~1 and ZENG Zhigang~2 1. Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 2. Institute of Oceanography, Chinese Academy of Sciences, Qingdao 266071, China Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Institute of Oceanography Chinese Academy of Sciences Qingdao 266071 China

THE Laojunshan metallogenic district located in southeastern Yunnan is an important tin polymetallic metallogenic district in China. The Dulong (tin-zinc polymetal, superlarge), Xinzhai (tin, large) andNanyangtian (scheelite, large) are the main deposits in this district. These deposits outcrop in the Lower-Middle Cambrian metamorphic series, and most orebodies that associated with skarns closely are stratoid,lenticular in occurrence and in accordance with the wall rocks. Distributed around the Laojunshan granite, the above-mentioned deposits were considered to be of magmatic-hydrothermal origin. But

关键词： Rb-Sr isotopes metallogenic epoch source Yunan.