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北大巴山平利穹窿南缘重晶石矿带地质特征及成矿条件分析

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魏东, 陈西民, 彭学军. 北大巴山平利穹窿南缘重晶石矿带地质特征及成矿条件分析[J]. 西北地质, 2016, 49(1): 214-223.
引用本文: 魏东, 陈西民, 彭学军. 北大巴山平利穹窿南缘重晶石矿带地质特征及成矿条件分析[J]. 西北地质, 2016, 49(1): 214-223.
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WEI Dong, CHEN Ximin, PENG Xuejun. Geological Characteristics and Metallogenic Conditions of Barite Ore Belt at South Margin of Pingli Dome in Northern Dabashan[J]. Northwestern Geology, 2016, 49(1): 214-223.
Citation: WEI Dong, CHEN Ximin, PENG Xuejun. Geological Characteristics and Metallogenic Conditions of Barite Ore Belt at South Margin of Pingli Dome in Northern Dabashan[J]. Northwestern Geology, 2016, 49(1): 214-223.
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北大巴山平利穹窿南缘重晶石矿带地质特征及成矿条件分析

  • 1.

    中国地质大学, 北京 100083;陕西省地质矿产勘查开发总公司, 陕西 西安 710054

  • 2.

    陕西省地质矿产勘查开发总公司第一分公司, 陕西 安康 725000

  • 基金项目: 陕西省平利县神仙台重晶石矿详查及资源储量核实

Geological Characteristics and Metallogenic Conditions of Barite Ore Belt at South Margin of Pingli Dome in Northern Dabashan

  • 1.

    China University of Geosciences, Beijing 100083, China;Shaanxi Geological and Mineral Survey Development Corporation, Xi'an 710054, Shaanxi, China

  • 2.

    The First Branch of Shaanxi Geological and Mineral Survey Development Corporation, Ankang 725000, Shaanxi, China

    摘要
  • 陕西秦巴地区钡资源丰富,大致呈南(镇巴-城口)、中(洛河-竹溪)、北(茨沟-赤岩)3条成矿带展布.平利穹窿南缘重晶石矿带(中带)沿着安康早古生代裂谷(O-S)中的平利穹窿(Pt3)南缘展布,地层区划属于紫阳-平利小区.赋矿层位震旦上统灯影组为白云岩、白云质灰岩夹硅质岩及含碳硅质板岩一套组合.矿层产出特征与区域构造以及沉积环境存在着重要的耦合关系.平利古陆南缘海槽凹陷带属半封闭海盆,火山(碎屑)岩基底构造为成矿提供了丰富的Ba、S物源, 海水溶液由酸性演化至弱酸-弱碱性氧化环境时重晶石沉积成矿,矿床成因类型属与海底火山(沉积)活动有关的浅海沟槽沉积型重晶石矿床.
    The barium resources is very rich in Qinba area, Shaanxi Province, with 3 ore belts, that is South (Zhenba-Chengkou), Middle (Luohe-Zhuxi) and North Belts (Cigou-Chiai). The middle barite ore belt is located and spreaded along the south margin of Pingli Dome (Pt3) that was developed in the Ankang Eopalaeozoic rift (O-S), and its strata belong to the Ziyang-Pingli Partion. The barite deposit is hosted Upper Sinian Dengying Formation, which is a set of dolomite, dolomitic limestone, siliceous rock and carbonaceous siliceous slate. The output characteristics of barite ore-layer have an important coupling relationship with regional tectonic and sedimentary environment. The trough depression at the south margin of Pingli paleo-land was a semi-closed oceanic basin, the volcano (clastic) rock basement structure provides a rich Ba,S source for mineralization. When the seawater solution evaluated from acidic to weak acid-alkalescent oxidation environment, the barite was deposited as mineral deposit. Therefore, this deposit belongs to the sedimentary barite deposit in shallow-water trench that was related to submarine volcano (sedimentary) activities.
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出版历程
收稿日期:  2014-12-22
修回日期:  2015-07-18
刊出日期:  2016-03-15

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