Metallogenic Geological Background of Lead-Zinc Polymetallic Deposits of Sinian Dengying Formation in the Northwestern Margin of Yangtze Landmass
详细信息
- 责任者：Chen Gaochao (Xi’an Center of Geological Survey ; China Geological Survey ; Xi’an 710054 ; China) ; Wang Juchuan
- 刊名：Geological Bulletin of China
- 出版年：2012
- 卷期：31(5)
- 关键词：铅锌矿床 ; lead-zinc deposit ; 扬子地台 ; Yangtze Platform
- 页码：p.773-782
- 图表：4 illus., 13 refs.
- 分类号：1001
- issnNo：ISSN1671-2552
- isbnNo：CN11-4648/P
摘要
libri’,’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>According to the train of thought libri; 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">＂libri’,’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>structure controls basin, basin controls facies and facies controls ore depositlibri; 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">＂libri’,’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>, the authors studied metallogenic conditions of lead-zinc deposits such as sedimentary basin, ore-bearing formation, ore-controlling structure, lithofacies and paleogeography, analyzed metallogenic characteristics and summed up the ore-forming regularity. In Dengying period, NE-and NNE-trending contemporaneous faults were developed on the Chuanxi-style basement in the northwest margin of Yangtze plate and, as a result, nearly NE-trending second-order basins and platforms were formed, which constituted the structural framework. of the platform alternate with the basin. The second-order basin was characterized by infratidal zone sediments of restricted basin, slump dolorudite appeared on the marginal slope of the platform, and ore-bearing hydrothermal fluids that migrated along contemporaneous faults were concentrated in brecciform marble to form ore deposits. Studies show that lead-zinc mineralization of Dengying Formation was obviously controlled by such factors as semi-active type basement of the basin, second-order basins in magnesian carbonate rock platform and contemporaneous faults that control the second-order basin.