检索结果-南通市图书馆

Acta Geochimica 2024年第3期43卷 441-458页

作者： Qing-Qing Zhang You-Wei Chen Jian-Feng Gao State Key Laboratory of Ore deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China University of Chinese Academy of Sciences Beijing 100049China

The Xingluokeng deposit is the largest gran-ite-related tungsten deposit within the Wuyi metallogenic belt in South *** Xingluokeng intrusion primarily consists of porphyritic biotite granite,biotite granite,andfine-grained *** deposit is represented by veinlet-disseminated mineralization with K-feldspathization and biotitization,alongside quartz-vein mineralization with gre-isenization and *** study investigates in-situ analyses of quartz compositions from both the intrusion and hydrothermal veinlets and *** element correlations indicate that trivalent Al^(3+)and Fe^(3+)replace Si^(4+)within the quartz lattice,with monovalent cations(such as Li^(+),Na^(+),and K^(+))primarily serving as charge *** Ge/Al ratios(tungsten *** contents in quartz from quartz veins indicate Qz-Ⅰformed at temperatures above 400°C,while Qz-Ⅱto Qz-Ⅴformed at temperatures below 350°*** in different generations of quartz,as indicated by Al content and(Al+Fe)/(Li+Na+K)ratio,suggest that Qz-Ⅰprecipi-tated from a less acidicfluid with a stable pH,whereas Qz-Ⅱto Qz-Ⅴoriginated from a more acidicfluid with notable pH ***,alkaline alteration and acidic alteration supplied the essential Ca and Fe for the precipita-tion of scheelite and wolframite,respectively,highlighting a critical mechanism in tungsten mineralization at the Xin-gluokeng deposit.

关键词： Quartz Xingluokeng tungsten deposit Trace elements South China

Re-Os Dating of Molybdenite from the Yaogangxian tungsten deposit,South China,and Its Geological Significance

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2008年第4期82卷 820-825页

作者： WANG Yonglei PEI Rongfu LI Jinwen QU Wenjun LI Li WANG Haolin DU Andao Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037China National Research Center of Geoanalysis Beijing 100037 China

The Yaogangxian tungsten deposit is located in the central part of the Nanling polymetailic metallogenic province. The orebodies occur as veins. Wolframite and molybdenite are the dominant ore minerals. Two samples were selected for molybdenite Re-Os dating in order to elucidate the timing of mineralization. Re-Os datings of molybdenite from quartz-woiframite veins and disseminated in granite yield ages of 153±7 Ma and 163.2±4.2 Ma respectively. The results indicate that the Yaogangxian tungsten deposit is the product of large-scale metallogenesis in the middle Yanshanian period in South China, and that the evolution from late magmatic to postmagmatic hypothermal mineralization occurred at about 10 Ma. The rhenium content of molybdenite in the Yaogangxian tungsten deposit suggests that the ore materials originated from the crust.

关键词： Re-Os isotopes molybdenite tungsten deposit South China

Hydrothermal alteration processes in the giant Dahutang tungsten deposit, South China: Implications from litho-geochemistry and mass balance calculation

在线全文

学校读者我要写书评

暂无评论

China Geology 2021年第2期4卷 230-244页

作者： Hai-Bo Zhao Yong Zhang Lei Liu Zhengzhou Institute of Multipurpose Utilization of Mineral Resources Chinese Academy of Geological SciencesZhengzhou 450006China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China Institute of Geological Survey of East China University of Technology Nanchang 330013China Northwest China Center for Geoscience Innovation Xi’an 710054China

The giant Dahutang tungsten(W)deposit has a total reserve of more than 1.31 Mt ***-disseminated scheelite and vein type wolframite mineralization are developed in this deposit,which are related to Late Mesozoic biotite *** major types of alterations,which include albitization,potassic-alteration,and greisenization,and overprinted silicification developed in contact *** mass balance calculate of the four alteration types were used to further understanding of the mineralization *** fresh porphyritic biotite granite has high Nb,Ta,and W,but low Ca and Sr while the Jiuling granodiorite has high Ca and Sr,but low Nb,Ta,and W *** altered porphyritic biotite granite indicated that the Nb,Ta,and W were leached out from the fresh porphyritic biotite granite,especially by sodic *** low Ca and Sr contents of the altered Neoproterozoic Jiuling granodiorite indicate that Ca and Sr had been leached out from the fresh granodiorite by the fluid from Mesozoic porphyritic biotite *** metal W of the Dahutang deposit was mainly derived from the fluid exsolution from the melt and alteration of W-bearing *** study of alteration presents a new hydrothermal circulation model to understand tungsten mineralization in the Dahutang deposit.

关键词： tungsten deposit Geochemistry Alteration Mass balance calculation Hydrothermal circulation Dahutang Mineral exploration engineering Jiangnan Orogenic Belt South China

Geology and mineralization of the supergiant Shimensi granitic-type W-Cu-Mo deposit(1.168 Mt)in northern Jiangxi,South China:A Review

在线全文

学校读者我要写书评

暂无评论

China Geology 2022年第3期5卷 510-527页

作者： Zhi-hui Zhang Da Zhang Xin-kui Xiang Xin-you Zhu Xiao-long He Development and Research Center of China Geological Survey Ministry of Natural ResourcesBeijing 100037China China University of Geosciences Beijing 100083China Geological team 916 of Jiangxi Geology&Mineral Exploration Bureau Jiujiang 332100China Beijing institute of Geology and Mineral Resources Beijing 100012China College of Environment and Resources Xiangtan UniversityXiangtan 411105China

The Shimensi deposit is a recently discovered W-Cu-Mo polymetallic deposit located in the Jiangnan porphyry-skarn W belt in South *** deposit has a resource of 0.74×10^(6)t of WO_(3)accompanied by 0.4×10^(6)t Cu and 28000 t Mo and other useful components like Ga,making it one of the largest W deposits in the *** paper is aimed to reveal the ore-controlling mechanisms of the Shimensi deposit,involving the role of the ore-related granites,the tectonic background for its formation,and the metallogenesis *** systematic geological survey suggests multi-types of alteration are developed in the deposit,mainly including greisenization,potassic-alteration,sericitization,chloritization,and *** engineering data and mining works indicate that the Shimensi deposit consists of two main orebodies of I and ***,the W resource has reached a supergiant scale,and the accompanied Cu,Mo,Au,Bi,Ga,and some other useful components are also of economic *** main ore-minerals consist of scheelite,wolframite and *** mineralization is the dominant type of the W-Cu-Mo polymetallic orebodies,and mainly distributes in the inner and external contact zone that between the Neoproterozoic biotite granodiorite and the Yanshanian *** main orebody occurs at the external contact zone,and the pegmatoid crust near the inner contact zone is an important prospecting marker of the W *** them,the disseminated W ores within the wall rock of the Neoproterozoic biotite granodiorite is a new mineralization type identified in this *** previous geochronological and isotopic data,we propose that the mineralization of the Shimensi deposit is closely related to the intruding of the Yanshanian porphyritic biotite granite and granite *** data suggest that the biotite granodiorite is rich in Ca and had provided a large amount of Ca for the precipitation of scheelite in this ***,it is a f

关键词： tungsten deposit Granitic-type deposit Metallogenesis Lower Yangtze metallogenic belt Porphyry-skarn W belt Mineral exploration engineering Shimensi Dahutang ore field South China

U-Pb Zircon Dating of the Yeniutan Granitic Intrusion in the Western Sector of the North Qilian Mountains

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2000年第4期74卷 781-785页

作者： MAO Jingwen ZHANG Zuoheng JIAN Ping WANG Zhiliang YANG Jianmin ZHANG Zhaochong Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 Institute of Geology Chinese Academy of Geological Sciences Beijing 100037

Zircons from granodiorite and biotite granite in the Yeniutan granitic intrusion in the western North Qilian Mountains yielded a weighted mean 206Pb/238U apparent age of 460±3 Ma, suggesting that the intrusion originated during the late stage of plate subduction. Its related Ta'ergou and Xiaoliugou deposits are two of the few large tungsten deposits formed in the plate subduction environment in the world. The U-Pb dating of the zircons from the biotite granite gave a discordant lower intercept age of 183±4 Ma, which implies that the Yanshanian event was probably superimposed on the North Qilian region.

关键词： U-Pb dating granodiorite biotite granite tungsten deposit North Qilian Mountains