| 董业才,邢全力,王建超,徐文杰.内蒙古大井子铜锡矿床控矿构造特征及成矿流体运移[J].地质找矿论丛,2025,40(2):197-205 |
| 内蒙古大井子铜锡矿床控矿构造特征及成矿流体运移 |
| Characteristics of ore-controlling structure and migration of ore-forming fluids in the Dajingzi Cu-Sn deposit, Inner Mongolia |
| 投稿时间：2024-12-01 修订日期：2025-04-17 |
| DOI：10.6053/j.issn.1001-1412.2025.02.007 |
| 中文关键词: 次火山热隆 控矿构造样式 成矿流体运移 铜锡矿床 岩浆侵入 层间滑动断裂 |
| 英文关键词:subvolcanic themal uplift structure ore-controlling structural styles migration of ore-forming fluids Cu-Sn deposit magma intrusion inter formation slip fault |
| 基金项目:中国有色集团科技计划项目"大兴安岭南段稀有-铜多金属找矿关键勘查技术研究与示范"(编号:2023KJZX02)、"大型有色金属矿山深边部找矿预测及综合技术示范研究"(编号:2018KJJH07)、"金属矿床快速预测定位关键技术与示范"(编号:2017KJJH02)共同资助。 |
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| 中文摘要: |
| 大井子矿床控矿构造特征的研究,认为矿体的控矿构造样式可归结为上行张扭式、下行滑落式、成矿混合式、后期破矿式。成矿流体运移与次火山热隆构造有关:早阶段热隆起时,成矿流体沿张性或张扭性断裂充填,形成脉幅较窄、产状较陡的上行张扭式;晚阶段岩浆冷却时,成矿流体沿层间滑动断裂充填,形成矿体脉幅较宽、产状较缓的下行滑落式;后期在重力作用之下的火山崩塌形成与成矿无关的后期破矿式,加上复合叠加成矿作用的成矿混合式。可见不同的构造样式控制不同形态的矿体,同时也因为两种不同的成矿流体运移方式才导致矿化特征的差异性。因此,该构造样式可以合理解释矿区范围内矿脉呈NW-NWW向成群成带分布的原因,也为其它区段寻找类似的隐伏矿床提供重要依据。 |
| 英文摘要: |
| The characteristics of ore-controlling structure in the Dajingzi deposit are studied. The ore-controlling structure of ore bodies can be classified to four styles: upward tension-torsion, downward slip, mixed ore-forming, and late ore-breaking. Migration of ore-forming fluids is related to the subvolcanic uplift. During early thermal uplift,the ore-forming fluids filled along tension-torsion faults,forming steep veins with narrow amplitude. As magma cools, the ore-forming fluids filled along inter formation slip faults,forming gentle veins with wide amplitude. In the late stage subvolcanoes collapsed under the influence of gravity,resulting in the ore-breaking structure. Ore bodies are controlled by different structural styles and differences of mineralization characteristics result from the different ore fluid migration. The above mentioned not only explain why the veins are distributed in groups or belts in NW-NWW direction,but also provide an important basis for prospecting similar concealed deposits in other sections of the Dajingzi ore field. |
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