层控菱铁矿的氧、碳同位素组成及其成因意义 |
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引用本文: | 王关玉,陈成业.层控菱铁矿的氧、碳同位素组成及其成因意义[J].沉积学报,1986,4(2):27-38. |
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作者姓名: | 王关玉 陈成业 |
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作者单位: | 北京大学地质学系 |
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摘 要: | 自然界中碳酸盐的氧和碳同位素组成取决于形成这种碳酸盐的水体同位素组成,水体的氧、碳同位素组成又直接反映了成岩或含矿流体的性质和来源。菱铁矿是仅次于方解石和白云石的常见碳酸盐矿物,它作为成岩成矿的多相作用产物,在地层中广泛发育。本文试图通过它们的氧、碳同位素组成,探讨我国不同时代地层内层状和层控菱铁矿的成因问题,着重研究菱铁矿的形成环境和成矿作用。
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收稿时间: | 1984-08-08 |
OXYGEN AND CARBON ISOTOPIC COMPOSITIONS OF STRATA-BOUND SIDERITES AND THEIR GENETIC SIGNIFICANCES |
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Institution: | Department of Geology, Peking University |
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Abstract: | Siderite is a common carbonate mineral, other than calcite and dolomite, wide- 1y appearing as beds or lenses in strata of all ages from the Preca m brian to the Cenozoic.The δ13C and δ18o in siderite reflect the isotopic composition of CO2 and w aters from which siderite is precipitated and can be used as environ mental indi- cators. |
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