Hydrothermal Venting-Flowing Sedimentation Characteristics of Devonian Barite Deposits from Leji, Zhenning County, Guizhou Province
详细信息
- 责任者：Gao Junbo (College of Resources and Environmental Engineering ; Guizhou University ; Guiyang 550003 ; China) ; Yang Ruidong
- 刊名：Acta Sedimentologica Sinica
- 出版年：2012
- 卷期：30(3)
- 关键词：重晶石矿床 ; barite deposit ; 热水沉积成矿作用 ; thermal water metallogenic ; 贵州 ; Guizhou Province
- 页码：p.422-430
- 图表：4 illus., 30 refs.
- 分类号：1002
- issnNo：ISSN1000-0550
- isbnNo：CN62-1038/P
摘要
The Devonian barite deposits located in Zhenning County, Guizhou Province have proved reserves of 33.02×106 t, belonging to largescale ore deposits. Research on sedimentation structures and tectonic characteristics related to the barite deposits reveal the coexistence of a variety of structures like laminar structures, baritebanded structure, brecciated structure, baritefragmental structure and massive structure, etc., which are similar to those of the TianzhuDahebian barite deposit, the hydrothermal barite rocks of Gutan in Guangxi Province and the hydrothermal water sedimentary barite rocks of Erlangping Group from north Qinling Mountains. Several types of sedimentary characteristics, such as hydrothermal venting channel phases formed in submarine hydrothermal venting, unitary hydrothermal lithofacies and hydrothermally mixed synsedimentary phases, were identified widely in barite orebeds in Zhenning, Guizhou. Similar to Devonian hydrothermal sedimentary rocks (deposits) from Qinling, those sedimentary phases and lithofacies features found in Zhenning characterize a hydrothermal turbidity current sedimentation phase. Sedimentary structures, constructions and lithofacies features of the orebed record well the information of submarine hydrothermal venting and its evolution, the sedimentation rhythm characteristics reveal the intensity of hydrothermal ventingflowing was weakstrongweak. Hence, barite deposits in Zhenning were formed in submarine hydrothermal venting sedimentation, and the hydrothermal sedimentary structures, constructions and hydrothermal lithofacies features make them ideal places for research on ancient hydrothermal venting diagenesis, metallogenesis and hydrothermal lithofacies categorization.
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