| 有机质在宣龙地区菱铁矿形成中的作用 |
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| 引用本文： | 刘敏,陈志明.有机质在宣龙地区菱铁矿形成中的作用[J].沉积学报,1997,15(3):96-102. |
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| 作者姓名： | 刘敏 陈志明 |
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| 作者单位： | 1 华东师范大学地理系,上海 200062; |
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| 基金项目： | 国家自然科学基金资助项目,生物成矿作用及其成矿背景(基金号:49132050) |
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| 摘 要： | 本文通过对宣龙铁矿中菱铁矿的分布和产状，化学成分，组构特征，碳氧同位素特征及与赤铁矿的生成关系等的分析，对区内菱铁矿进行了较深入细致的研究，进而提出宣龙铁矿中菱铁矿的形成是成岩期有机质对先成赤铁矿还原的结果，沉积物中高铁与低铁的关系直接取决于起还原作用并能把高铁转化为低铁的有机质数量。上述结论又得到了有机地球化学方面资料的证实。
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| 关 键 词： | 宣龙地区 菱铁矿 碳氧同位素 有机质还原作用 |
| 收稿时间： | 1996-07-11 |
The Role of Organic Matter in the Genesis of Siderite from the Xuanlong Area |
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| Liu Min,Chen Zhiming and Chin Qiying.The Role of Organic Matter in the Genesis of Siderite from the Xuanlong Area[J].Acta Sedimentologica Sinica,1997,15(3):96-102. |
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| Authors: | Liu Min Chen Zhiming and Chin Qiying |
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| Institution: | 1 Depatrment of Geography,East China Normal University,Shanghai 200062;2 Institute of Geology,Academia Sinica,Beijing 100029 |
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| Abstract: | Based on the analysis of siderite distribution,occurrence,chemical composition,structural characteristics,carbon-oxygen isotope characteristics and relationship between siderite and hematite,the paper made a systematic study of siderite in the region,and refered that the genesis of siderite in the Xuanlong area is the result ofganic matter reducing primary hematite during diagenesis.The ferric and ferreous relation depends directely on organic Contents which can comvert the ferreous into the ferric by erduction.The above conclusion was also proved by organic geochemistry data. |
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| Keywords: | Xuanlong area\ siderite carbon oxygen\ organic reduction |
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