苏皖辽地区新元古代微亮晶构造碳酸盐岩的沉积岩相与环境约束

柳永清; 高林志; 刘燕学

苏皖辽地区新元古代微亮晶构造碳酸盐岩的沉积岩相与环境约束

中国地质科学院地质研究所,北京 100037

基金项目: 国土资源部地质调查局“中国大陆及边缘关键地史阶段地震事件地层研究”项目(编号: 200313000055)资助.

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作者简介:
柳永清，男，1960年出生，研究员，博士，沉积地质学和地层学。

中图分类号: P588.242

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M icrospar Structure Carbonate and Constrain of Sedimentary Facies and Environments in Jiangsu, Anhui and Liaoning Provinces of the Northern China

Chinese Academy of Geological Sciences, Beijing 100037

摘要

摘要: 国内外元古代碳酸盐岩中常见席状、透镜状、脉状和块状等形态的微亮晶碳酸盐岩。微亮晶体宏观、微观边界清晰,内部充填均一等粒结构的方解石微亮晶。宿主岩相以含泥质或粉砂质的细砂屑、粉泥屑灰岩为主,经常与风暴岩共生。微亮晶构造碳酸盐岩发育在缓坡型台地,沉积层序中常见潮汐流、风暴流侵蚀—充填和浪成交错层理与递变层理。微亮晶构造碳酸盐岩发育严格受沉积环境和岩相约束,形成于 (内缓坡深部—中缓坡浅部 )潮下带和环潮坪,风暴浪基面是其发育的最大深度。垂向序列由高频潮下带和环潮坪微层序加积而成,单个微层序顶部通常为环潮坪为纹层状含铁质有机质泥屑碳酸盐岩披盖层,是一个向上沉积动力减弱、沉积物变细和水体变浅的沉积旋回。
- 苏皖辽地区 /
- 新元古代 /
- 微亮晶构造 /
- 碳酸盐岩 /
- 沉积环境
Abstract: Microspar structures represented by complex ptygmatically folded, dotted lags, blobs or vertical and horizontal ribbons and ve ins are common in Pro terozo ic carbona tesw orldw ide. Microspar structures be ing filled by fine,equant sparry calcite (ordolomite) crystals display sharpen lateral boundaries with hosting rocks composed dominantly of limemud or fine-grained carbonatesw ith quartz silt& clay occasionally and tempestites-carbonaceous tubidite rhythmites with m icrospar veins and microspar-intrac last lags in the middle and upper. Microspar structure lim estones are mainly deposited on a remarkab ly ramp carbonate platform, and common with tidal and storm current plane and graded beddings, rhythm ites with scalloped erosional surfaces and depositional filled structures in m icrosparbearing carbonates. Occurence of microspar structure are identically constra ined with in shallow subt idal and peritidal (in term of ramp,.i e., deep inner ramp to shallow m id-ramp), and storm-base in the ramp is the distal sea-floor lim it of m icrospar fo rmation. Vert ical successions o fm icrospar-bearing carbonate are stacked by high-frequency shallow subt idal and peritidal cyclic depositional micro-sequences, which show ing a cycle of thinning, shallowing and depositional dynamic decreasing-upward, and with a peritidal cap of red iron and organic carbonaceous lam inite attrited to sabuha-like m icro facies on the top of individual cycles.
- Jiangsu-Anhui and Liaoning provinces /
- Neoproterozoic /
- microspar structure /
- carbonate /
- environment

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参考文献(1)

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苏皖辽地区新元古代微亮晶构造碳酸盐岩的沉积岩相与环境约束

作者简介:
柳永清，男，1960年出生，研究员，博士，沉积地质学和地层学。

计量

M icrospar Structure Carbonate and Constrain of Sedimentary Facies and Environments in Jiangsu, Anhui and Liaoning Provinces of the Northern China

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目录

苏皖辽地区新元古代微亮晶构造碳酸盐岩的沉积岩相与环境约束

中国地质科学院地质研究所,北京 100037

作者简介:
柳永清，男，1960年出生，研究员，博士，沉积地质学和地层学。

English Abstract

M icrospar Structure Carbonate and Constrain of Sedimentary Facies and Environments in Jiangsu, Anhui and Liaoning Provinces of the Northern China

Chinese Academy of Geological Sciences, Beijing 100037

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苏皖辽地区新元古代微亮晶构造碳酸盐岩的沉积岩相与环境约束

作者简介: 柳永清，男，1960年出生，研究员，博士，沉积地质学和地层学。

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M icrospar Structure Carbonate and Constrain of Sedimentary Facies and Environments in Jiangsu, Anhui and Liaoning Provinces of the Northern China

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出版历程

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苏皖辽地区新元古代微亮晶构造碳酸盐岩的沉积岩相与环境约束

中国地质科学院地质研究所,北京 100037

作者简介: 柳永清，男，1960年出生，研究员，博士，沉积地质学和地层学。

English Abstract

M icrospar Structure Carbonate and Constrain of Sedimentary Facies and Environments in Jiangsu, Anhui and Liaoning Provinces of the Northern China

Chinese Academy of Geological Sciences, Beijing 100037

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期刊在线

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作者简介:
柳永清，男，1960年出生，研究员，博士，沉积地质学和地层学。

作者简介:
柳永清，男，1960年出生，研究员，博士，沉积地质学和地层学。