Sulfur-Lead Isotopic Composition of the Wulagen Pb-Zn Deposit in the Northwestern Margin of the Tarim Basin, Wuqia Area,Xinjiang and Its Geological Implications

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Sulfur-Lead Isotopic Composition of the Wulagen Pb-Zn Deposit in the Northwestern Margin of the Tarim Basin, Wuqia Area,Xinjiang and Its Geological Implications

详细信息

责任者：Han Fengbin (Institute of Geomechanics ; Chinese Academy of Geological Sciences ; Beijing 100081 ; China) ; Chen Zhengle
刊名：Geological Bulletin of China
出版年：2012
卷期：31(5)
关键词：铅锌矿床 ; lead-zinc deposit ; 塔里木盆地 ; Tarim Basin
页码：p.783-793
图表：5illus., 3 tables, 1 plate, 39 refs.
分类号：1001
issnNo：ISSN1671-2552
isbnNo：CN11-4648/P

摘要

FAMILY: ’Calibri’,’sans-serif’; FONT-SIZE: 10.5pt; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-theme-font: minor-fareast; mso-bidi-font-family: ’Times New Roman’; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi" lang=EN-US>Located in Wuqia area of western Xinjiang, the Wulagen lead-zinc deposit is hosted by Mesozoic-Cenozoic strata of Kashi depression in the northwestern margin of the Tarim Basin. Recent studies and prospecting have confirmed the favorable ore-forming conditions of this ore deposit, and the mineral potential should be very large. However, its genesis remains controversial for a long time. In this paper, S-Pb isotopic compositions of sulfides from ore bodies in the ore deposit were systematically determined so as to discuss the source of ore-forming material and the genesis or the ore deposit. The sulfur isotopic compositions δ³⁴S in ore bodies are in a wide range of-26.09～family: Calibri; mso-hansi-font-family: Calibri; mso-fareast-theme-font: minor-fareast; mso-bidi-font-family: ’Times New Roman’; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi">＋family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-theme-font: minor-fareast; mso-bidi-font-family: ’Times New Roman’; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi" lang=EN-US>15.0‰. The sulfur-rich characteristics of two-terminal element indicated that the sulfur might have been derived from the marine sulfate thermal chemical reduction. The lead isotopic ratios are 206Pb/204Pb=17.771family: Calibri; mso-hansi-font-family: Calibri; mso-fareast-theme-font: minor-fareast; mso-bidi-font-family: ’Times New Roman’; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi">～family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-theme-font: minor-fareast; mso-bidi-font-family: ’Times New Roman’; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi" lang=EN-US>18.6413, 207Pb/204Pb=15.402family: Calibri; mso-hansi-font-family: Calibri; mso-fareast-theme-font: minor-fareast; mso-bidi-font-family: ’Times New Roman’; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi">～family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-theme-font: minor-fareast; mso-bidi-font-family: ’Times New Roman’; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi" lang=EN-US>15.6454, and ²⁰⁸Pb/²⁰⁴Pb=37.92family: Calibri; mso-hansi-font-family: Calibri; mso-fareast-theme-font: minor-fareast; mso-bidi-font-family: ’Times New Roman’; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi">～family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-theme-font: minor-fareast; mso-bidi-font-family: ’Times New Roman’; mso-ascii-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-theme-font: minor-bidi" lang=EN-US>38.7507, respectively, varying very narrowly and plotted near the orogenic belt evolution curve. It can be inferred that the ore-forming metals were probably derived from the the old stratum. These results and previous data Wulagen lead-zinc deposit was one of the sediment-Hosted lead-zinc deposits, related to the thrust-nappe setting of South Tianshan-West Kunlun regional orogenic belt, large-scale migration of basin fluids and the reducing conditions from oil and gas.