The Role of Organic Matter in the Genesis of Siderite from the Xuanlong Area

Liu Min; Chen Zhiming; Chin Qiying

Based on the analysis of siderite distribution, occurrence, chemical composition, structural character-istics, carbon- oxygen isotope characteristics and relationship between siderite and hematite, the papermade a systematic study of siderite in the region, and refered that the genesis of siderite in the Xuanlongarea is the result ofganic matter reducing primary hematite during diagenesis. The ferric and ferreous re-lation 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.

1 Depatrment of Geography,East China Normal University,Shanghai 200062;

2 Institute of Geology,Academia Sinica,Beijing 100029

Received Date: 1996-07-11

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Abstract: Based on the analysis of siderite distribution, occurrence, chemical composition, structural character-istics, carbon- oxygen isotope characteristics and relationship between siderite and hematite, the papermade a systematic study of siderite in the region, and refered that the genesis of siderite in the Xuanlongarea is the result ofganic matter reducing primary hematite during diagenesis. The ferric and ferreous re-lation 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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Reference (17)

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