鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制

张永生

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鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制

张永生

文章导航 > 沉积学报 > 2000 > 18(3): 424-430

张永生. 鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制[J]. 沉积学报, 2000, 18(3): 424-430.

引用本文:

张永生. 鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制[J]. 沉积学报, 2000, 18(3): 424-430.

ZHANG Yong sheng. Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin[J]. Acta Sedimentologica Sinica, 2000, 18(3): 424-430.

Citation:

ZHANG Yong sheng. Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin[J]. Acta Sedimentologica Sinica, 2000, 18(3): 424-430.

张永生. 鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制[J]. 沉积学报, 2000, 18(3): 424-430.

引用本文:

张永生. 鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制[J]. 沉积学报, 2000, 18(3): 424-430.

ZHANG Yong sheng. Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin[J]. Acta Sedimentologica Sinica, 2000, 18(3): 424-430.

Citation:

ZHANG Yong sheng. Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin[J]. Acta Sedimentologica Sinica, 2000, 18(3): 424-430.

鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制

张永生

中国地质科学院盐湖资源与环境开放研究实验室中国地质科学院矿产资源研究所北京 100037

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作者简介:
张永生,男,1963出生,副研究员,博士后,沉积学及盐湖学

中图分类号: P588.24⁺5

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文章访问数: 758
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Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin

ZHANG Yong sheng

Laboratory of Salt Lake Resources and Environment, Institute of Mineral Deposits,Chinese Academy of Geological Sciences,Beijing 100037

摘要

摘要: 鄂尔多斯地区奥陶系马家沟群中部发育一套厚层块状白云岩。在西部地区定边至鄂托克旗一带,这套块状白云岩连续厚度达数百米。定探 1井揭示的最大厚度为 431m。自西向东,白云岩体由厚变薄,并与石灰岩呈指状交织。这套块状白云岩由粗粉晶—细晶白云石组成,斑状结构发育。常见云斑的边界为缝合线,这表明斑状白云石化明显受缝合线控制。白云岩有序度平均值为 0.85,CaCO₃ 摩尔含量平均为 5 0.6 5 g/mol。δ¹³ C的平均值为 0.6‰ (PDB),δ¹⁸O的平均值为 - 7.4‰ (PDB)。主体细晶白云石中液态包体常见,最低均一温度为 104℃,包体成分中含有大量的有机成分CH₄ 和无机成分H₂ S。上述特征表明,这套白云岩是由深埋藏白云岩化作用形成的,它显示出良好的储集性能,是重要的后备储集岩。
- 奥陶系 /
- 块状白云岩 /
- 深埋藏白云石化
Abstract: There is a suit of massive dolostones(as MD hereafter)which develop in the middle Majiagou Group of the Ordovician in the Ordos basin.It is mainly distributed in Majiagou Fm.Ⅳ,and it has several hundred metres at the zone of Dingbian County to Eteke Qi in the west part of Ordos basin, with maximum thickness 431 m in Dingtan Well 1.It becomes thinner and thinner from west to east,and is intercalated with limestones from the middle to eastern part of Ordos. The MD consist of coarse silt-sized to fine sand-sized dolomite crystals.The mottled texture is well developed in such dolostones,and the boundary of dolomitic spots is commonly stylolites.It shows that mottled dolomitization is obviously controlled by stylolites. The dolomites have uniform dar red colour under cathodoluminecence. The analytical data of 67 samples shows the ordering of dolomites averages 0.85,and the molar concentration of CaCO₃ averages 50.65%;δ ¹³ C averages 0.6‰(PDB),δ¹⁸ O averages -7.4‰(PDB).The characteristics of cathodoluminecence and X-ray indicate approximate ideal dolomites are formed in stable diagenetic environment of slow conclear and crystalization.The homogeneous temperature of 21 primary inclusions in the host crystals is from 104℃ to 355℃(uncorrected by pressure),and the temperature of 104℃ is the lowest one.According to the earth temperature gradient of 3.98℃/100m in this area,the maximum burial depth of dolomitization is at least 2 600 m. Besides,the composition of inclusions has two parts-organic and inorganic and there is a certain of CH 4 both in gas phase and in liquid phase. All characteristics above prove that the huge thick dolostone body is formed in deep burial dolomitic environment.
- Ordovician /
- massive dolostones(MD) /
- deep burial dolomitization

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参考文献(9)

[1]	Feng Zengzhao, Zhang Yongsheng, Zhang Chuanlu, Kang Qifa, Dolostones of the Ordovician Majiagou Group of Ordos, North China. 30th Intemational Geological Congress Abstract, 1996,2: 210
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[5]	Badiozamani K,The dorag dolomitization model - application to the mid-dle Ordovician of Wisconsin[J] . Sed. Petrology, 1973,43(4) :965～984
[6]	何知礼.包体矿物学[M] .北京：地质出版社,1982～
[7]	Lee Yong IL, Friedman. G, M. Deep - burial dolomitization in the Or-dovician Ellenburger Group carbonates, west Texas and SouthesstemNew Mexico[J] . Jour. Sed. Petrology, 1987,57 (3): 544～557
[8]	李安仁,张锦泉,郑荣才.鄂尔多斯盆地下奥陶统白云岩成因类型及其地球化学特征[J] .矿物岩石,1993,13(4)：41～49
[9]	郝石生,贾振远编著.碳酸盐岩油气形成和分布[M] .北京：石油工业出版社,1989.63～73

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鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制

张永生

中国地质科学院盐湖资源与环境开放研究实验室中国地质科学院矿产资源研究所北京 100037

作者简介:
张永生,男,1963出生,副研究员,博士后,沉积学及盐湖学

收稿日期: 1999-03-30
修回日期: 1999-05-03
刊出日期: 2000-09-10

中图分类号: P588.24⁺5

关键词:

奥陶系 /

块状白云岩 /

深埋藏白云石化

摘要: 鄂尔多斯地区奥陶系马家沟群中部发育一套厚层块状白云岩。在西部地区定边至鄂托克旗一带,这套块状白云岩连续厚度达数百米。定探 1井揭示的最大厚度为 431m。自西向东,白云岩体由厚变薄,并与石灰岩呈指状交织。这套块状白云岩由粗粉晶—细晶白云石组成,斑状结构发育。常见云斑的边界为缝合线,这表明斑状白云石化明显受缝合线控制。白云岩有序度平均值为 0.85,CaCO₃ 摩尔含量平均为 5 0.6 5 g/mol。δ¹³ C的平均值为 0.6‰ (PDB),δ¹⁸O的平均值为 - 7.4‰ (PDB)。主体细晶白云石中液态包体常见,最低均一温度为 104℃,包体成分中含有大量的有机成分CH₄ 和无机成分H₂ S。上述特征表明,这套白云岩是由深埋藏白云岩化作用形成的,它显示出良好的储集性能,是重要的后备储集岩。

English Abstract

Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin

ZHANG Yong sheng

Laboratory of Salt Lake Resources and Environment, Institute of Mineral Deposits,Chinese Academy of Geological Sciences,Beijing 100037

Received Date: 1999-03-30
Rev Recd Date: 1999-05-03
Publish Date: 2000-09-10

Keywords:

Abstract: There is a suit of massive dolostones(as MD hereafter)which develop in the middle Majiagou Group of the Ordovician in the Ordos basin.It is mainly distributed in Majiagou Fm.Ⅳ,and it has several hundred metres at the zone of Dingbian County to Eteke Qi in the west part of Ordos basin, with maximum thickness 431 m in Dingtan Well 1.It becomes thinner and thinner from west to east,and is intercalated with limestones from the middle to eastern part of Ordos. The MD consist of coarse silt-sized to fine sand-sized dolomite crystals.The mottled texture is well developed in such dolostones,and the boundary of dolomitic spots is commonly stylolites.It shows that mottled dolomitization is obviously controlled by stylolites. The dolomites have uniform dar red colour under cathodoluminecence. The analytical data of 67 samples shows the ordering of dolomites averages 0.85,and the molar concentration of CaCO₃ averages 50.65%;δ ¹³ C averages 0.6‰(PDB),δ¹⁸ O averages -7.4‰(PDB).The characteristics of cathodoluminecence and X-ray indicate approximate ideal dolomites are formed in stable diagenetic environment of slow conclear and crystalization.The homogeneous temperature of 21 primary inclusions in the host crystals is from 104℃ to 355℃(uncorrected by pressure),and the temperature of 104℃ is the lowest one.According to the earth temperature gradient of 3.98℃/100m in this area,the maximum burial depth of dolomitization is at least 2 600 m. Besides,the composition of inclusions has two parts-organic and inorganic and there is a certain of CH 4 both in gas phase and in liquid phase. All characteristics above prove that the huge thick dolostone body is formed in deep burial dolomitic environment.

张永生. 鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制[J]. 沉积学报, 2000, 18(3): 424-430.

引用本文:

张永生. 鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制[J]. 沉积学报, 2000, 18(3): 424-430.

ZHANG Yong sheng. Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin[J]. Acta Sedimentologica Sinica, 2000, 18(3): 424-430.

Citation:

ZHANG Yong sheng. Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin[J]. Acta Sedimentologica Sinica, 2000, 18(3): 424-430.

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鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制

作者简介:
张永生,男,1963出生,副研究员,博士后,沉积学及盐湖学

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Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin

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鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制

中国地质科学院盐湖资源与环境开放研究实验室中国地质科学院矿产资源研究所北京 100037

作者简介:
张永生,男,1963出生,副研究员,博士后,沉积学及盐湖学

English Abstract

Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin

Laboratory of Salt Lake Resources and Environment, Institute of Mineral Deposits,Chinese Academy of Geological Sciences,Beijing 100037

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鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制

作者简介: 张永生,男,1963出生,副研究员,博士后,沉积学及盐湖学

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Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin

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鄂尔多斯地区奥陶系马家沟群中部块状白云岩的深埋藏白云石化机制

中国地质科学院盐湖资源与环境开放研究实验室 中国地质科学院矿产资源研究所 北京 100037

作者简介: 张永生,男,1963出生,副研究员,博士后,沉积学及盐湖学

English Abstract

Mechanism of Deep Burial Dolomitization of Massive Dolostones in the Middle Maj iagou Group of the Ordovician, Ordos Basin

Laboratory of Salt Lake Resources and Environment, Institute of Mineral Deposits,Chinese Academy of Geological Sciences,Beijing 100037

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期刊在线

联系我们

作者简介:
张永生,男,1963出生,副研究员,博士后,沉积学及盐湖学

中国地质科学院盐湖资源与环境开放研究实验室中国地质科学院矿产资源研究所北京 100037

作者简介:
张永生,男,1963出生,副研究员,博士后,沉积学及盐湖学