地学前缘 ›› 2022, Vol. 29 ›› Issue (1): 413-426.DOI: 10.13745/j.esf.sf.2020.9.42

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基于深部地球物理信息的构造变形岩相分类研究

张宝林1,2,3(), 吕古贤4,*(), 余建国1,2,3, 梁光河1,2,3, 李志远1,2,3, 徐兴旺1,2,3, 胡宝群5, 王红才4, 毕珉峰6, 焦建刚7, 王翠芝8   

  1. 1.中国科学院 地质与地球物理研究所 中国科学院矿产资源研究重点实验室, 北京 100029
    2.中国科学院 地球科学研究院, 北京 100029
    3.中国科学院大学, 北京 100049
    4.中国地质科学院 地质力学研究所, 北京 100081
    5.东华理工大学 地球科学学院, 江西 南昌 330013
    6.中国地质科学院 矿产资源研究所, 北京 100037
    7.长安大学 地球科学与资源学院, 陕西 西安 710054
    8.福州大学 紫金地质与矿业学院, 福建 福州 350108
  • 收稿日期:2020-05-15 修回日期:2020-10-26 出版日期:2022-01-25 发布日期:2022-02-22
  • 通讯作者: 吕古贤
  • 作者简介:张宝林(1963—),男,研究员,主要从事构造物理化学及隐伏矿床定位预测理论与技术研究。E-mail: blzhang@mail.iggcas.ac.cn
  • 基金资助:
    山东黄金矿业(玲珑)有限公司委托科研项目“玲珑金矿田构造蚀变岩成矿规律和深部预测研究”(LLYY-2019-001);内蒙古自治区地质勘查基金管理中心地质勘查项目“内蒙古自治区赤峰市柴胡栏子地区典型矿田构造岩相测量与成矿规律研究”(2019-KY02);海南山金矿业有限公司委托科研项目“海南抱伦金矿构造岩相测量和有效探矿工程部署研究”(HNSJ191017-195);山东黄金归来庄矿业有限公司委托科研项目“归来庄金矿构造控矿与构造岩相找矿研究”(GLZZB-20191201)

Classification of tectonic deformation lithofacies based on deep geophysical information

ZHANG Baolin1,2,3(), LÜ Guxian4,*(), YU Jianguo1,2,3, LIANG Guanghe1,2,3, LI Zhiyuan1,2,3, XU Xingwang1,2,3, HU Baoqun5, WANG Hongcai4, BI Minfeng6, JIAO Jiangang7, WANG Cuizhi8   

  1. 1. CAS Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
    2. Innovation Academy for Earth Science, Chinese Academy of Sciences, Beijing 100029, China
    3. University of Chinese Academy of Sciences, Beijing 100049, China
    4. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
    5. School of Earth Sciences, East China University of Technology, Nanchang 330013, China
    6. Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China
    7. School of Earth Sciences and Resources, Chang’an University, Xi’an 710054, China
    8. Zijin School of Geology and Mining, Fuzhou University, Fuzhou 350108, China
  • Received:2020-05-15 Revised:2020-10-26 Online:2022-01-25 Published:2022-02-22
  • Contact: LÜ Guxian

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摘要：

“构造变形岩相”填图方法的创立和应用为老矿区深部及外围的找矿工作指明了方向,在实践中取得了显著的效果,需要大力推广和深入研究。对于构造变形岩相带的深部结构认识,需要依靠地球物理信息的解译。与地球物理场性质相类似,构造变形岩相带也是一个现存的地质体;物探工作目的是要探测和揭示构造变形岩相带的埋深、轮廓、内部结构构造等特征,为确定其形成时间和演化过程提供依据。由于地质与地球物理的复杂时空关系,如果仅以新鲜岩石标本物性参数的差异作为判别标志,难以提高地球物理方法的分辨率和有效性。结合构造变形岩相进行综合解译,更能提高解释推断成果的多学科融合性。作为终极勘探目标,需要紧密结合构造控矿级序,建立构造变形岩相带的三级分类标准,提取对应的地球物理信息:一级构造变形岩相带为目标物所处的构造单元及构造应力场,及其所对应的区域地球物理场特征,如隆凹构造相间的伸展构造域;二级构造变形岩相带为目标物所处的控矿构造体系,及其所对应的矿田地球物理场特征,如岩浆核杂岩隆起-拆离构造系统;三级构造变形岩相带为目标物所在的有利成矿构造部位,及其所对应于关键剖面的地球物理特征,如侵入岩体与围岩的接触带或者含矿断裂带等。选择国际流行的典型金属矿床类型,介绍了三级构造变形岩相带的地球物理组合信息特征及其分级利用操作流程,为有效应用地球物理勘探方法开展深部找矿预测提供了范例。

关键词: 深部地球物理信息, 构造变形岩相带, 物性参数, 三级分类, 找矿靶区

Abstract:

The establishment and application of “tectonic deformation lithofacies” mapping highlight the direction for deep and peripheral prospecting in old mining areas. In practice, this approach has achieved remarkable results and needs to be promoted and further studied. The understanding of the deep structure of tectonic deformation lithofacies zone depends on the interpretation of geophysical information. Similar to the properties of the geophysical field, the tectonic deformation lithofacies zone is also an existing geological body. The purpose of geophysical exploration is to explore and reveal the features of the burial depth, contour and internal structure of the tectonic deformation facies belt, so as to provide a basis for determining its formation time and evolutionary process. Due to the complex spatiotemporal correlation between geological and geophysical scales, it is difficult to improve the resolution and effectiveness of geophysical method if only the difference in physical parameters of fresh rock specimens is used as a discriminant marker. Therefore, it is necessary to combine tectonic deformation lithofacies into comprehensive interpretation, which can improve the multidisciplinary fusion of interpretation and deduction results. In searching the ultimate exploration targets, the structural ore-controlling factor is needed for setting up a three-level classification standard for tectonic deformation facies belt to extract the corresponding geophysical information. The first-level is the tectonic unit and tectonic stress field of the target object as well as the corresponding regional geophysical field characteristics, such as the extensional tectonic domain with alternative uplift and concave structures. The second-level refers to the ore-controlling structural system of the target object and the corresponding geophysical field characteristics of the ore field, such as the magmatic core complex uplift and detachment structural system. The third-level is the favorable metallogenic tectonic location of the target object and the geophysical characteristics corresponding to the key section, such as the contact zone between intrusive rock and surrounding rock or the ore-bearing fault zone. In this paper, the geophysical assemblage information characteristics and workflow of the three-level tectonic deformation lithofacies belt are introduced for selected typical metal deposit types prevalent in the world, providing an example for the effective application of geophysical exploration methods in deep prospecting prediction.

Key words: deep geophysical information, tectonic deformation lithofacies zone, physical parameters, three-level classification, ore prospecting target area

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