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甘肃西秦岭阳山金矿控矿构造特征及对勉略构造混杂岩带金矿勘查的启示

苏秋红, 贾儒雅, 刘鑫, 王辉

苏秋红, 贾儒雅, 刘鑫, 王辉. 2020: 甘肃西秦岭阳山金矿控矿构造特征及对勉略构造混杂岩带金矿勘查的启示. 地质通报, 39(8): 1204-1211.
引用本文: 苏秋红, 贾儒雅, 刘鑫, 王辉. 2020: 甘肃西秦岭阳山金矿控矿构造特征及对勉略构造混杂岩带金矿勘查的启示. 地质通报, 39(8): 1204-1211.
SU Qiuhong, JIA Ruya, LIU Xin, WANG Hui. 2020: The ore-controlling structural characteristics of Yangshan gold deposit and its enlightenment for the exploration of gold deposits in Mian-Lue tectonic mélange belt, West Qinling Orogen. Geological Bulletin of China, 39(8): 1204-1211.
Citation: SU Qiuhong, JIA Ruya, LIU Xin, WANG Hui. 2020: The ore-controlling structural characteristics of Yangshan gold deposit and its enlightenment for the exploration of gold deposits in Mian-Lue tectonic mélange belt, West Qinling Orogen. Geological Bulletin of China, 39(8): 1204-1211.

甘肃西秦岭阳山金矿控矿构造特征及对勉略构造混杂岩带金矿勘查的启示

基金项目: 

中国地质调查局项目《甘肃阳山地区金矿整装勘查区专项填图及技术应用示范》 12120114050201

国家重点研发计划项目课题《深部矿产资源三维找矿预测评价示范》 2017YFC0601506

详细信息
    作者简介:

    苏秋红(1981-), 女, 工程师, 从事矿产资源勘查工作。E-mail:154262762@qq.com

    通讯作者:

    贾儒雅(1988-), 男, 博士, 工程师, 从事岩石学、矿床学及找矿预测研究工作。E-mail:jiaruya@126.com

  • 中图分类号: P618.51

The ore-controlling structural characteristics of Yangshan gold deposit and its enlightenment for the exploration of gold deposits in Mian-Lue tectonic mélange belt, West Qinling Orogen

  • 摘要:

    阳山金矿大地构造位置位于秦祁昆造山系秦岭弧盆系南秦岭勉略构造混杂岩带,成矿区划属秦岭成矿省南秦岭成矿带新关-阳山成矿亚带。由于矿床位于构造混杂岩带中,控矿构造复杂,给勘查工作带来了很大的困难,一度无法提交勘查报告。为了详细理清构造控矿样式,利用矿区探矿工程资料,提取大量的构造要素,利用构造统计分析及应力分析方法,结合野外现场观察,提出了全新的构造控矿模式。通过研究认为,阳山金矿位于勉略构造混杂岩带文县安昌河-观音坝逆冲断裂推覆构造体系前锋断褶带的葛条湾-草坪梁复背斜东部转折端,矿体受褶皱两翼的韧脆性断裂破碎带及其核部楔入式断层控制,总体以北东东向展布为主,平面上呈"网结状"展布,剖面上倾向既有向北,也有向南,还有近水平的。从而解决了阳山金矿的控矿构造和矿体圈连问题,对勉略构造混杂岩带中金矿勘查具有很好的借鉴意义。

    Abstract:

    The Yangshan gold deposit in Wenxian County is located in the triangle area north of the Yangtze plate, south of the China-Korea plate, and east of the Songpan-Garze fold system, and belongs to the south belt of the West Qinling orogenic belt.Since the deposit is located in the tectonic melange belt with extremely complicated metallogenic structure, it has brought great difficulties to the exploration work of the deposit in the past, and researchers even once failed to submit an exploration report.In order to find out the style of metallogenic structure, the authors, based on the data of prospecting engineering in the mining area and a large number of structural elements, proposed a new metallogenic structure model by using structural statistical analysis and stress analysis methods combined with a large number of field observations.It is held that it is located at the eastern turning point of Getiaowan-Caopingliang complex anticline in the forward fault-fold belt of the nappe structural system of Anchanghe-Guanyinba thrust fault in Wenxian County, Mianlue tectonic mixed rock belt.The orebodies are controlled by folding wings toughening brittle fracture fault fracture zone and the wedge type, with the typical "netted" tectonic melange tectonic style characteristics, and are generally NNE-trending.The strikes of orebodies are diverse in north, south or horizontal direction.Thus, the problem of ore-control structure and orebody circle connection of the Yangshan gold deposit is solved, which provides a good reference for gold exploration in Mian-Lue tectonic melange belt.

  • 致谢: 感谢甘肃省地矿局胡晓隆教授级高工对本文的指导和帮助,以及审稿专家提出的宝贵修改意见。
  • 图  1   阳山金矿区域构造纲要图

    1—新近系;2—白垩系河东群;3—二叠系大关山组;4—三叠系光盖山组、郭家山组;5—石炭系益哇沟组;6—泥盆系屯寨组、桥头岩组;7—志留系白水江群、石坊群;8—下古生界碧口群;9—黑云母花岗岩:10—整合及不整合地质界线;11—断层;12—金矿床(矿化点)

    Figure  1.   Outline of the Yangshan gold orefield

    图  2   阳山金矿安坝里矿区地质简图

    1—钙质、炭质千枚岩夹薄层状灰岩透镜; 2—灰白色千枚岩、绢云母千枚岩夹薄层状灰岩透镜体; 3—炭质千枚岩、少量绢云母石英千枚岩; 4—板状绢云母千枚岩及少量泥质板岩变石英粉砂岩; 5—硅质岩; 6—灰黑色中厚层状灰岩; 7—灰色灰岩、砂质板岩、粉砂岩、细砂岩等; 8—灰岩透镜体; 9—花岗斑岩脉; 10—实测及推测断层; 11—复背斜; 12—复向斜; 13—短轴背斜;14—短轴向斜;15—倒转背斜;16—详查区范围及19号勘查线位置

    Figure  2.   Geological map of Anbali mine ares Yangshan gold deposit

    图  3   阳山金矿安坝里矿区19号勘探线剖面

    1—矿体;2—脉岩;3—断层;4—中段;5—钻孔;6—矿区界线

    Figure  3.   Geological section along No.19 exploration line of Anbali mine area, the Yangshan gold deposit

    图  4   阳山金矿成矿构造特征(a~f)及成矿模式图(g)

    a—连续的向背斜褶皱;b—层间褶皱;c—近南北向断层;d—北北东向断层;e—北北西向断层;f—近东西向断层

    Figure  4.   Features of metallogenic structure(a~f)and tectonic setting model(g) of the Yangshan gold deposit

    图  5   两期构造运动示意图

    Figure  5.   Schematic diagrams of two-stage tectonic movement

    图  6   阳山金矿安坝里矿区断裂产状极射赤平投影

    Figure  6.   Attitudes of faults in the form of equatorial polar projection in the Yangshan gold deposit

    图  7   阳山金矿安坝里矿区地层产状赤平极射投影

    Figure  7.   Attitude of red plane polar projection of strata in the Yangshan gold deposit

    图  8   阳山金矿安坝里矿区圈定的新旧矿体对照图

    a—以往圈定矿体;b—本次圈定矿体; 1—矿体; 2—脉岩;3—断层;4—中段;5—钻孔;6—矿区界线

    Figure  8.   Comparison of old and new orebodies in the Yangshan gold deposit

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出版历程
  • 收稿日期:  2019-04-11
  • 修回日期:  2020-03-24
  • 网络出版日期:  2023-08-15
  • 刊出日期:  2020-08-14

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