| 王军,曹锦元,智铎强.墨西哥哈利斯科州Cinco Minas银金矿区构造与成矿关系[J].矿产勘查,2014,5(1):90-95 |
| 墨西哥哈利斯科州Cinco Minas银金矿区构造与成矿关系 |
| Relationship between structure and mineralization in Cinco Minas silver-gold deposit area in Jalisco, Mexico |
| 投稿时间：2013-09-02 |
| DOI： |
| 中文关键词: 构造 银金成矿 地堑 断层 破火山口 |
| 英文关键词: structure silver-gold mineralization graben fault caldera |
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| 中文摘要: |
| 墨西哥哈利斯科州Cinco Minas银金矿为一与新生代火山岩有关的冰长石—绢云母型浅成低温热液矿床。区域以及各级构造的交互作用控制了矿床的形成。首先,位于墨西哥西海岸的太平洋板块与科科斯板块既有走滑又有俯冲,造成了不同的区域应力场,形成Cinco Minas断层,并引发断层的多期活动。该断层作为区域性断层,在早期控制了岩浆侵位,形成火山,在火山塌陷形成破火山建造后,断层走滑活动又活化了破火山建造,在二者叠加部位及破火山内部提供了有利成矿条件,形成矿床。成矿后,断层继续活动,此时区域上以拉张应力为主,表现为加利福尼亚湾的打开,在矿区则表现为正断层活动,并因正断层活动形成地堑,使部分矿体出露地表。因此,该区成矿特点充分体现了构造演化与矿床形成是一个复杂而有机的系统。 |
| 英文摘要: |
| The Cinco Minas silver- gold deposit is an adularia- sericite epithermal type deposit related to the Cenozoic volcanic rocks. Interaction of regional and local structures control the formation of the Ag-Au deposit. Firstly, the Cinco Minas fault was formed by the structural strike-slip and subduction of the Pacific plate and the Cocos plate located in the western coast of Mexico which caused different regional stress fields, and experienced multi- phases of activities. As a regional fault, the Cocos Minas fault controlled the magmatic intrusion at the early stage, and caused the volcano. After the caldera formation was formed, the sliding movement of fault reactivated the caldera formation, thus at the superimposition part the silver-gold deposit was formed. The fault continued acting after the silver-gold mineralization, and at this time the extensional stress dominated the region, which was represented by the open of California gulf and in the mining area the activity of normal fault. The normal fault activity formed the graben and part of the orebody outcropped. Therefore, the metallogenic feature of this area embodying the structure evolvement and the silver-gold deposit formation is a complicated and intrinsic system. |
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