| 南黄海自生黄铁矿成因及其环境指示意义 |
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| 引用本文： | 初凤友,陈丽蓉,申顺喜,李安春,石学法.南黄海自生黄铁矿成因及其环境指示意义[J].海洋与湖沼,1995,26(3):227-233. |
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| 作者姓名： | 初凤友 陈丽蓉 申顺喜 李安春 石学法 |
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| 作者单位： | 中国科学院海洋研究所!青岛，266071，中国科学院海洋研究所!青岛，266071，中国科学院海洋研究所!青岛，266071，中国科学院海洋研究所!青岛，266071，中国科学院海洋研究所!青岛，266071 |
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| 基金项目： | 自然科学基金!49376263，中国科学院院长基金 |
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| 摘 要： | 样品为１９８９年采自南黄海，利用显微镜，电子显微镜，电子探针和化学分析方法，对自生黄铁矿的形态，成份和同位素特征进行研究，在此基础上就其成因与形成环境的关系进行初步探讨。研究结果表明，自生黄铁矿集合体形态可以分为聚莓，单莓和细粒３种，霉体特征的形态是早期成岩作用阶段沉积物随机堆积的结果，可以作了沉积成因黄铁矿的形态标型黄铁矿微量成份特征显示其沉积成因，同时亦表现对泥质沉积物地球化学背景值的继承性，
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| 关 键 词： | 黄铁矿 标型 成因 环境指标 南黄海 |
| 收稿时间： | 1993/12/5 0:00:00 |
| 修稿时间： | 1994/10/24 0:00:00 |
ORIGIN AND ENVIRONMENTAL SIGNIFICANCE OF AUTHIGENIC PYRITE FROM THE SOUTH YELLOW t (HUANGHAI) SEA SEDIMENTS |
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| Chu Fengyou,Chen Lirong,Shen Shunxi,Li Anchun and Shi Xuefa.ORIGIN AND ENVIRONMENTAL SIGNIFICANCE OF AUTHIGENIC PYRITE FROM THE SOUTH YELLOW t (HUANGHAI) SEA SEDIMENTS[J].Oceanologia Et Limnologia Sinica,1995,26(3):227-233. |
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| Authors: | Chu Fengyou Chen Lirong Shen Shunxi Li Anchun and Shi Xuefa |
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| Institution: | Institute of Oceanology Academia Sinica. Qingdao 266071 |
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| Abstract: | Preliminary results of optical microscope, electron microscope and electron probe study of the morphology, composition and isotopes of authigenic pyrite sampled from the South Yellow (Huangliai) Sea in 1989 and the relationship between the origin and formation environment suggest that the aggregate morphology of the authigenic pyrite can be classified as framboids, single framboid and fine grain. The morphology characteristic of framboids was the result of sediment random accumulation in the early diagenetic period, and can serve as morphological feature of sedimentary pyrite. The rare composition charocteristic of pyrite shows its sedimentary origin, as inferred from the geochemical background value of muddy sediment. The difference between pyrite crystals and colloid pyrite in morphology and chemical composition suggested that in the forming processes, authigenic pyrite charged in composition from Fes to colloid pyrite and then to pyrite, and charged in structure from colloid to colloid state and then to crystal. The segment pyrite formed in surface or subsurface sediment. The first type of pyrite was formed at wick alkaline or alkaline condition. The second type of pyrite was formed at wick acid or wick alkaline condition. The abundance of pyrite reflects rich oxygen and locally reducing microenvironment, with strong upwelling activity and mixing of different water masses. Pyrite and mud sediments spatially coexisted and were interdependent in origin. Final formation of pyrite depended on the local environment, while its abundance reflected the general geological background. |
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| Keywords: | Authigenic pyrite Morphological features Origin Environment |
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