| 摘要: |
| 沉积盆地内地层中碳的来源,根据其碳、氧同位素特征可归纳为:海洋沉积碳酸盐碳、生物碳、热解非生物成因碳、大气淡水方解石碳和热卤水系统中的无机碳。热水成因的金矿及喷气沉积矿床中的碳都具有深源成因的无机碳。深部含无机碳的热流体喷溢到海洋底部可以解释为扩张盆地底部形成的缺氧环境和含矿黑色页岩的主导原因。 |
| 关键词: 含矿缺氧盆地 碳同位素 沉积地层 成矿作用 |
| DOI： |
| 附件 |
| 投稿时间：1999-08-15 |
| 基金项目: |
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| Carbon isotope in sedimentary strata and new explanation for the origin of ore-bearing anoxic basins |
| YANG Zhen-qiang, CHEN Kai-xu, HUANG Hui-lan |
| (Yichang Institute of Geology and Mineral Resources, Yichang 443003, China) |
| Abstract: |
| The carbon in sedimentary basins may be derived from:(1)marine carbonates;(2) organic carbon;(3)abiogenetic carbon from thermal degradation;(4)carbon from meteoric calcite,and (5)inorganic carbon in the thermal brine systems.The carbon both in the hydrothermal gold deposits and hydrothermally exhalative-sedimentary deposits has a deep-seated origin.The processes of deep-seated inorganic carbon-bearing hydrothermal fluids spouting onto the sea floor may be interpreted to be the leading factors for the formation of anoxic environments and ore-bearing black shales at the bottom of extensional basins. |
| Key words: ore-bearing anoxic basin carbon isotope sedimentary strata mineralization |
