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夹皮沟金矿田闪长岩脉、正长斑岩脉与金矿体的关系及成矿预测——以北沟金矿床为例
- 李临位|刘伟
- 作者单位：
- 中国黄金集团有限公司|北京金有地质勘查有限责任公司
基金项目：
- isnull
详细信息：
- 作者简介：
- 李临位（1986—），男，吉林桦甸人，工程师，硕士，从事金矿地质勘查及科研管理工作；北京市东城区安定门外大街9号，中国黄金集团有限公司，100011；E-mail:li.lw@chinagoldres.com
- 通讯作者：
- isnull
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Relation between diorite vein,orthophyre vein and gold ore bodies and metallogenic prediction in Jiapigou Gold Field—A case study of Beigou Gold Deposit
- English Author：
- China National Gold Group Co.,Ltd.|Beijing Jinyou Geological Exploration LLC.
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
夹皮沟金矿田为位于华北地台北缘东部重要的金矿集区。通过对夹皮沟金矿田内闪长岩脉、正长斑岩脉与金矿体关系的研究，发现闪长岩脉、正长斑岩脉与金矿体在形成时间、空间分布、物质来源上均具有十分紧密的联系。以北沟金矿床为例，金矿体附近多有闪长岩脉产出，或金矿体与闪长岩脉具有平行产出的规律；金矿体产出于正长斑岩脉的上下盘或一定范围内，正长斑岩脉与金矿体的形成近于同期。结合矿田应力分析、矿区与矿床地质特征，以及前人研究成果，对北沟金矿区进行了成矿预测，770 m中段东北部具有探获近南北向隐伏金矿体的潜力；依据深部发现正长斑岩脉及其与探获金矿体的关系，矿区深部具有探获更大规模金矿体的潜力。这也为夹皮沟金矿田内探矿提供了新的找矿思路。
关键词:
闪长岩脉；正长斑岩脉；金矿体；成矿预测；北沟金矿床；夹皮沟金矿田
Abstract:
Jiapigou Gold Field is an important high ore concentration area located in the east part of North China Platform.The paper studied the relation between diorite vein,orthophyre vein and gold ore bodies in Jiapigou Gold Field,and discovered that there are close ties between diorite vein,orthophyre vein and gold ore bodies in terms of forming ages,spatial distribution and material sources.In the case study of Beigou Gold Deposit,diorite frequently occurs around gold ore bodies,or gold ore bodies occur parallel to diorite regularly; gold ore bodies occur at the footwall or hanging walls of orthophyre or within certain distance,it is nearly at the same time that orthophyre vein and gold ore bodies formed.Based on the stress analysis in the field,district and deposit geological characteristics and the study from predecessors,metallogenic prediction in Beigou Gold District is made that there are potentials prospecting SN concealed ore bodies in the northeast part on 770 m level; according to the discovery of the relation between orthophyre vein and the explored gold ore bodies in the deep part,there are potentials for prospecting larger gold bodies in the deep part.This also provides new prospecting ideas for exploration in Jiapigou Gold Field.
Keywords:
diorite vein;orthophyre vein;gold ore body;metallogenic prediction;Beigou Gold Deposit;Jiapigou Gold Field
