古地理学报 ›› 2023, Vol. 25 ›› Issue (3): 525-553. doi: 10.7605/gdlxb.2023.03.035

所属专题: 近年来的相关构造古地理学文章

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论热水沉积岩相及其构造古地理*

方维萱   

  1. 有色金属矿产地质调查中心,矿山生态环境资源创新实验室,北京 100012
  • 收稿日期:2022-08-02 修回日期:2022-11-29 出版日期:2023-06-01 发布日期:2023-06-07
  • 作者简介:方维萱,男,1961年生。研究员,博士生导师,从事沉积盆地、矿产普查与勘探研究。E-mail: 569026971@qq.com。*庆贺西北大学建校120周年特邀稿件!
  • 基金资助:
    云南省企业基础研究应用基础研究联合专项(编号: 202101BC070001-015)、自然资源部公益性行业科研专项项目(编号: 201511016-1)、国家科技部科技支撑计划课题(编号: 2006BAB01 B09)和科技部转制科研院所专项资金项目(编号: 2008EG115074)联合资助

Hydrothermal sedimentary lithofacies and their tectono-palaeogeography

FANG Weixuan   

  1. China Nonferrous Metals Resource Geology Survey,Innovation Laboratory of Mine,Environment and Mineral, Beijing 100012, China
  • Received:2022-08-02 Revised:2022-11-29 Online:2023-06-01 Published:2023-06-07
  • About author:FANG Weixuan,born in 1961,is a senior researcher and doctoral supervisor. Now he is mainly enegaged in study on sedimentary basin,prospection and exploration for mineral resource. E-mail: 569026971@qq.com.
  • Supported by:
    Co-funded by the Joint Project of Applied Basic Research and Enterprise Basic Research in Yunnan Province(No.202101BC070001-015),the Scientific Research Project of Public Welfare Industry(No.201511016-1),the National Sci?Tech Support Plan(No.2006BAB01 B09),and the Special Project of the Ministry of Science and Technology(No.2008EG115074)

摘要: 热水沉积岩相形成于裂谷盆地、洋中脊(有限洋盆)、弧—盆系统、陆缘盆地、陆内湖相盆地等不同的构造古地理单元内。按照成岩成矿方式—岩石组合—地球化学动力学分类原则,热水沉积岩相类型可划分为热水同生沉积岩相、热水准同生交代岩相、热水同生蚀变岩相、热水爆炸—液压致裂角砾岩相、热卤水准同生渗滤交代岩相与热流柱构造有关的热流体隐爆—液压致裂角砾岩相,包括不同成岩方式形成的17种构造岩相学类型,它们是建立构造岩相学独立填图单元的基础。热水流体系统的根部相→喷口相→中心相→过渡相→远端相,具有显著的构造岩相学分带和相体分布规律,但在现今陆内造山带中,它们多经历了碎裂岩相、糜棱岩相和热流体改造—叠加—再造成岩相,需进行构造岩相学变形史研究和构造岩相学变形筛分,才能有效恢复它们形成时的构造古地理,促进提升对深部隐伏构造岩相学探测与资源预测的准确性。

关键词: 热水沉积岩相, 构造古地理单元, 根部相, 喷口相, 中心相, 过渡相, 远端相

Abstract: Hydrothermal sedimentary facies can be formed in rifted basins,mid-oceanic ridges,arc-basin system,as well as epeiric basins and intracontinental lacustrine basins. According to diagenetic and metallogenic modes,rock associations,and geochemical dynamic classifications,hydrothermal sedimentary lithofacies may be classified into hydrothermal syngenetic sedimentary lithofacies,hydrothermal quasi-syngenetic metasomatism lithofacies,hydrothermal syngenetic altered lithofacies,lithofacies of hydrothermal-blasting to hydraulic fracturing breccias,lithofacies of thermal brine quasi-syngenetic infiltration-metasomatism,and lithofacies of crytoexplosive to hydraulic fracturing breccias by hydrothermal fluids related to hydrothermal plume,including 17 types of tectonic lithofacies. All of them are of basic to establishment of independent tectonic mapping elements. The root,vent,center,proximate,and distal facies of the hrdrothermal fluid system have obvious tectonic lithofacies zonation and distribution in basins. However,all of them experienced deformations such as cataclastic rock facies,mylonite facies,and facies of the altered rocks related to thermal fluid reworking,overprinting,and reconstruction in intrcontinental orogens. After studies on deformation history and deformation-sieving of tectonic lithofacies,their tectono-palaeogeography units can be better understood. It may further help us to improve detecting buried tectonic lithofacies and mineral resource predication.

Key words: hydrothermal sedimentary lithofacies, tectono-palaeogeography units, roots facies, vent facies, center facies, proximate facies, distal facies

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