Epigenesis of Pb-Zn Deposits in the Xicheng Ore Field,Western Qinling |
| |
Authors: | ZHANG Chuanlin |
| |
Institution: | ZHANG Chuanlin,Department of Earth Sciences,Nanjing University,Nanjing,Jiangsu LI Yong and YANG Zhihua Xi'an Engineering College,Xi'an,Shaanxi |
| |
Abstract: | It was previously considered that all of the Pb-Zn deposits in the Xicheng orefield belong to Devonian hydrothermal-sedimentary deposits or their reworked ones. Study proves that the host strata, besides the Devonian, include the Palaeoproterozoic. The super-large Changba-Lijiagou Pb-Zn deposit occurs in the Palaeoproterozoic strata. The deposits in this district are not hydrothermal-sedimentary deposits or their reworked ones, but Yanshanian-Himalayan epigenetic hydrothermal deposits. The modes of occurrence, sizes and positions of all the deposits in the Xicheng orefield are completely controlled by the choula (draw)-thrust sheet Therefore the previous grounds for the model of the Qinling-type Pb-Zn deposits cannot hold good. The authors propose that the Changba-type and Bijiashan-type Pb-Zn deposits be used to represent two mineral deposit models with different characteristics in the Xicheng orefield. |
| |
Keywords: | mineral deposit model choula (draw)-thrust sheet Changba-type Bijiashan-type Xicheng orefield |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《Acta Geologica Sinica》浏览原始摘要信息 |
| 点击此处可从《Acta Geologica Sinica》下载免费的PDF全文 |
|