| 董 健.山东夏甸地区金矿床地球物理场特征[J].地质与勘探,2018,54(1):138-147 |
| 山东夏甸地区金矿床地球物理场特征 |
| Characteristics of geophysical fields around gold deposits in the Xiadian region, Shandong Province |
| 投稿时间：2016-10-20 修订日期：2017-10-05 |
| DOI：10.12134/j.dzykt.2018.01.015 |
| 中文关键词: 夏甸 重力场 磁场 CSAMT 金矿 山东 |
| 英文关键词: Xiadian, gravity field, magnetic field, CSAMT, gold mine, Shandong |
| 基金项目:国家重点研发计划（2016YFC0600107）和中国地质调查局项目（编号：12120114034101）共同资助 |
|
| 摘要点击次数: 2209 |
| 全文下载次数: 1212 |
| 中文摘要: |
| 山东胶东地区是我国著名的黄金产地，深部含金破碎带与地球物理重磁场有着密切的关系，通过建立以重磁信息为主体的综合找矿标志，可进一步缩小找矿靶区。本次研究以夏甸地区典型金矿床为例，根据布格重力异常图、剩余重力异常图、ΔT化极异常图，讨论了其重磁场特征，结合已知地质剖面和CSAMT剖面解释结果，从重、磁、电三方面论证了本区金矿床具有“低密度、低磁性、低电阻”的物性特点；总结了本区金矿床成矿条件，建立了地质-地球物理模型，在此基础上探讨了一套金矿勘查物探技术组合流程：根据重磁面积工作圈定有利成矿区范围，然后布设重磁剖面，利用其联合反演结果，确定控矿构造的位置及产状，最后根据CSAMT测量结果低阻区（带）的位置可进一步推断矿体位置。该套组合对招远-平度断裂带深部隐伏金矿找矿工作具有重要的指导意义。 |
| 英文摘要: |
| The Jiaodong area of Shandong Province is a famous gold production area in China. The deep gold-bearing fracture zone is closely related to gravity and magnetic fields. By establishing comprehensive prospecting indicators dominated by gravity and magnetic information, the prospecting target range can be further reduced. Taken, a typical gold deposit in the Xiadian region as an example, based on maps of Bouguer gravity anomalies, residual gravity anomalies, and ΔT reduction to the pole anomalies, this work discussed characteristics of the gravity and magnetic fields around the gold deposits. Combined with known geological sections and the results of CSAMT section interpretation, the physical features of low density, low magnetism and low resistance were demonstrated from gravity, magnetic and electric fields. In addition, the mineralization conditions of the gold deposits in this area were summarized and the geological and geophysical models were established. On this basis, a set of combination processes of gold exploration geophysical technology was discussed. The favorable mineralization area was delineated based on the gravity and magnetic area, and then gravity and magnetic profiles were designed. The position and occurrence of the ore-controlling structure are determined using the results of joint inversion. Finally, according to the results of the low resistance area (zone) from CSAMT measurement the orebody location was further inferred. The research results have important guiding significance for prospecting deep concealed gold deposits on the Zhaoyuan - Pingdu fault. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
