| 秦德先,杨明初.牟定铜矿控矿因素及成矿预测[J].地质找矿论丛,1993,(4):49-61 |
| 牟定铜矿控矿因素及成矿预测 |
| THE ORE-CONTROLLING FACTORS AND PROGNOSIS OF THE MUDING COPPER DEPOSITS |
| 投稿时间：1993-04-05 |
| DOI：10.6053/j.issn.1001-1412.1993.4. 006 |
| 中文关键词: 牟定砂岩铜矿 控矿因素 成矿预测 隐伏断裂控矿 构造成矿机理 |
| 英文关键词: |
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| 中文摘要: |
| 牟定铜矿是滇中砂岩铜矿中重要而具有代表性的矿床。过去多数人认为这类矿床属沉积成因,在找矿中往往忽视构造控矿因素。笔者近年研究表明:地层(岩相古地理)控制矿源层的形成,成岩期后构造运动中铜质活化迁移成矿,矿床为沉积-改造成因。盆地东缘上白垩统马头山组是最重要的控矿地层,背斜鞍部附近等构造圈闭良好的低压空间是有利的储矿场所,改造成因的浅色砂岩是有利的赋矿围岩。预测狮子山背斜南端和朵基背斜南端是矿区还有找矿远景的两个地段。 |
| 英文摘要: |
| The Muding copper deposit is a important and typical sandstone-hosted ore deposit in Mid-Yunnan. Previously, it was regarded as a sedimentary one and structural control was neglected. Investigations by the authors in recent years show that ore source bed is controled by rock facies and palaeogeography and copper remobilised to form ore dposit during structural activities post diagenesis. Therefore it is genetically a reworked sedimentary deposit. Ore is controled by Matoushan Group in which low pressure structural traps near the saddle of anticlines are good for ore formation. The genetically reworked sandstone with light color hosts copper ore. Further targets predicted are southern parts of Shizhishan and Dojishan anticlines. |
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