| 陈大,刘义.峨眉山玄武岩与铅锌成矿作用关系探讨[J].矿产勘查,2012,3(4):469-475 |
| 峨眉山玄武岩与铅锌成矿作用关系探讨 |
| Discussion on the relationships between Emeishan basalt and Pb-Zn mineralization |
| 投稿时间：2012-04-09 |
| DOI： |
| 中文关键词: 川滇黔 地幔柱 峨眉山玄武岩 铅锌 成矿作用 |
| 英文关键词: Sichuan, Yunnan and Guizhou Province mantle plume emeishan basalt Pb-Zn mineralization |
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| 中文摘要: |
| 川滇黔相邻区海西期—印支期构造—岩浆演化过程,经历了地幔的上拱、地幔柱上涌成穹、玄武岩浆喷溢、后期岩浆热演化4个阶段,这一过程中,伴随了地幔柱活动引起的裂陷沉积作用、穹状隆起、岩浆活动、热液活动等；玄武岩与铅锌成矿关系分析显示,通过直接途径,玄武岩没有提供成矿物质、流体和热源,但其风化释放的大量铅锌物质部分参与成矿；流体化学及C、H、O同位素特征显示,该区成矿混合流体中的岩浆成因部分,实为地幔柱活动的去气作用提供,成矿的大部分热源与地幔柱对深部地壳改造所形成的古地热场驱动热水循环有关。 |
| 英文摘要: |
| The tectonic and magmatic evolution process in the epoch of Hercynian and Indosinian come through four phases as follows:the mantle upwelling, the mantle plume upwelling be into fornix, basaltic magma eruption, the late magmatic thermal evolution. In this process, accompanied rifting and sedimentation caused by mantle plume activity, fornix uplift, magma activity, hydrothermal activity and so on. Basalt and Pb-Zn mineralization relationship analysis reveal that the basalt does not provid ore-forming material, fluid and heat source through the direct approach, but its weathering release large amounts of Pb-Zn material providing some involving in the mineralization. Fluid chemistry and C, H, O isotopic characteristics display that the metallogenic fluid mixture of magmatic origin is provided by the mantle plume activity through wiping off gas effect, a large part of the heat source for mineralization has relationship with hot water circulation driven by geothermal field which is formed by mantle plume alter the deep crust. |
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