Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Sedimentary Geology and Tethyan Geology》 2018-03
Add to Favorite Get Latest Update

Sphalerites from the giant Wuzhishan Pb-Zn deposit in Guizhou: Rb-Sr dating and its geological implications

WANG Sheng-wei;JIN Can-hai;ZHANG Yu;SUN Xiao-ming;ZHOU Qing;LIAO Zhen-wen;GUO Yang;JIANG Xiao-fang;WANG Zi-zheng;Chengdu Center,China Geological Survey;School of Earth Sciences and Geological Engineering,Sun Yat-sen University;School of Marine Sciences,Sun Yat-sen University;  
The Wuzhishan Pb-Zn deposit explored in recent year is a giant carbonate-hosted strata bound Pb-Zn deposit in western Guizhou. However,it is much debatable about the mineralization age,genetic type and orecontrolling factor of the Pb-Zn deposit. The Rb-Sr dating of sphalerites in the disseminated and network sulfide ores from the Nayongzhi ore block in the Wuzhishan Pb-Zn deposit gives an isochron age of 458. 2 ± 2. 9 Ma( MSWD =1. 07,n = 5),with an initial ~(87)Sr/~(86)Sr ratio of 0. 713823 ± 0. 000010. The mineralization ages may be traced back to the late Middle Ordovician to early Late Ordovician,obviously later than the depositional periods of the host rocks,representing a typical epigenetic deposit. Geologically and geochemically,the Wuzhishan Pb-Zn deposit should be classified into a representative Mississippi Valley-type( MVT) Pb-Zn deposit. Tectonically, the Wuzhishan Pb-Zn deposit is genetically closely associated with the Caledonian orogeny in correspondence with the uplifting of central Guizhou. The basement fault structures and fracture zones are interpreted as the internally controlling facors of mineralization,whereas the collision and mountain building of the Cathysia and Yangtze continental masses during the Caledonian,corresponding to the Duyun and Guangxi movements,are believed to be the externally controlling factors of metallogenesis for the giant Wuzhishan Pb-Zn deposit.
【Fund】: 中国地质调查局项目《贵州1:5万玉屏幅G49E005004;凉伞幅G49E006004;天马幅004003区域地质调查》(子项目编码:DD20160018-07);《乌蒙山区地质矿产综合调查》(项目编码:DD20160019);《扬子西缘基地成矿作用及找矿方向研究》(项目编码:1212010911064);; 国家自然科学基金青年科学基金项目(项目编码:41403038 41202067)资助
【CateGory Index】: P618.42;P618.43
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved