准噶尔盆地西北缘二叠系云质碎屑岩地球化学特征及成因机理研究

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准噶尔盆地西北缘二叠系云质碎屑岩地球化学特征及成因机理研究

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中图分类号: P618.130.2⁺1

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文章访问数: 1917
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Geochemical Characteristics and Genetic Mechanism of Permian Dolomitic Clastic Rocks in Northwestern Junggar Basin

摘要

摘要: 通过岩石学、碳氧同位素和元素地球化学等方法对准噶尔盆地西北缘二叠系云质碎屑岩特征进行了研究，分析了白云岩化机理并建立了白云岩化作用成因模式。结果表明，研究区岩石类型为白云质泥岩、白云质粉砂岩、白云化凝灰质粉砂岩和白云化凝灰质泥岩等，白云石化以交代湖相灰泥质和硅质（凝灰质）组分形成的自形或半自形的粉晶—细晶白云石为主，常见残余方解石和晚期方解石胶结物充填。岩石中 V/ Ni比（1.2～4.8）、Sr含量（95.5～782.2 μg/g）、Mg/Ca比（0.5～3.0）、有序度（0.36~0.98）、δ¹⁸O_PDB（-14.8‰～3.2‰）和δ¹³C_PDB（-1‰～5.2‰）的变化范围都较大。研究区云质岩类形成于水动力条件较弱、水体较深、相对安静的半闭塞陆相微咸—咸水湖湾环境，具多期次成因；二叠系时期构造运动复杂，断裂发育，火山活动频繁，不仅提供了白云石化过程中Mg²⁺的来源，且为富镁流体的快速流动和渗透提供了通道。综合研究认为本区的云质岩有准同生白云岩化、埋藏白云岩化和热液白云岩化三种成因类型。
- 准噶尔盆地 /
- 二叠系 /
- 云质碎屑岩 /
- 地球化学特征 /
- 成因机理
Abstract: The types and lithology characters of Permian dolomitic clastic rocks in northwestern Junggar Basin are investigated by means of petrologic analysis, Xray indentification, carbon and oxygen isotope geochemistry and element geochemistry analysis, also analyzed Dolomization mechanism, Established dolomitization model. dolomitic clastic rocks in study areas include dolomitic mudstone, dolomitic siltstone, dolomitic tuffaceous siltstone, dolomitic tuffaceous shale,ect. And dolostones which are formed through dolomitization by replacing lacutrine plaster and siliceous (tuffaceous) components mainly consist of powderfine dolomites with automorphic or hypidiomorphic crystals, while residual calcite and late filled calcite cement commonly exist. The ratio of V/ Ni(1.2～4.8)content of Sr(95.5～782.2 μg/g)Mg/Ca(0.5～3.0),the degree of order(0.36~0.98)δ¹⁸O_PDB(14.8‰～3.2‰)and δ¹³C_PDB(1‰～5.2‰)all have larger variation range. The dolomitic rocks in this area mainly formed in a relatively weak hydrodynamic conditions, deep, peaceful, salt and lowsalt semiclosed terrestrial bay environment, have a characteristic of several stages and various causes. During Permian periods, in the researching zone the tectonics is complex, fault development, subtropical hot climate and frequent volcanic which provide favourable source of Mg²⁺ and permeability channel for the rich magnesium fluid fast flow. Comprehensive research show that these dolomitic rocks have three kinds of genetic types: Penecontemporaneous dolomitization, buried dolomitization, hydrothermal dolomitization.
- Junggar Basin /
- Permian /
- dolomitic clastic rocks /
- geochemical characteristics /
- genetic mechanism

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[1]	王鑫锐, 孙雨, 刘如昊, 李钊. 陆相湖盆细粒沉积岩特征及形成机理研究进展 . 沉积学报, 2023, 41(2): 349-377. doi: 10.14027/j.issn.1000-0550.2021.117
[2]	李友川, 李宏义, 兰蕾. 北部湾盆地流二段油页岩地球化学特征及成因 . 沉积学报, 2022, 40(3): 616-625. doi: 10.14027/j.issn.1000-0550.2021.015
[3]	丁超, 庞燕青, 孟亚玲, 黄钰珑, 李闻东, 张顺存, 郭晖, 李佳思, 张明峰. 准噶尔盆地中拐地区上乌尔禾组富火山碎屑砂砾岩储层的古环境及储层机理研究 . 沉积学报, 2020, 38(4): 851-867. doi: 10.14027/j.issn.1000-0550.2020.054
[4]	赵研, 郭佩, 鲁子野, 郑荣才, 常海亮, 王国芝, 魏研, 文华国. 准噶尔盆地下二叠统风城组硅硼钠石发育特征及其富集成因探讨 . 沉积学报, 2020, 38(5): 966-979. doi: 10.14027/j.issn.1000-0550.2019.110
[5]	厚刚福, 孙靖, 王力宝, 李亚哲, 李啸, 沈金龙, 窦洋, 陈扬, 韩守华. 不同古地貌单元水下分流河道沉积特征及其意义——以准噶尔盆地夏盐地区三工河组二段为例 . 沉积学报, 2019, 37(4): 825-833. doi: 10.14027/j.issn.1000-0550.2018.175
[6]	梁飞, 黄文辉, 牛君. 鄂尔多斯盆地西南缘二叠系山西组山1段-下石盒子组盒8段物源分析 . 沉积学报, 2018, 36(1): 142-153. doi: 10.3969/j.issn.1000-0550.2018.016
[7]	刘亚洲, 刚文哲, 陈果, 孙晶波, 姜崇. 鄂尔多斯盆地盐池—定边地区长7段烃源岩芳烃地球化学特征 . 沉积学报, 2018, 36(4): 818-828. doi: 10.14027/j.issn.1000-0550.2018.093
[8]	张丽霞, 柳益群, 向辉, 李红, 周鼎武, 焦鑫, 李哲萱, 南云. 凝灰岩型含油层系特征与成因分析——以准噶尔盆地火烧山油田二叠系平地泉组为例 . 沉积学报, 2018, 36(4): 768-776. doi: 10.14027/j.issn.1000-0550.2018.056
[9]	胡双全, 杜贵超, 甄胜利. 泰国呵叻盆地二叠系Pha Nok Khao组碳酸盐岩沉积相特征 . 沉积学报, 2017, 35(4): 789-796. doi: 10.14027/j.cnki.cjxb.2017.04.013
[10]	陈文彬, 付修根, 谭富文, 曾胜强, 冯兴雷, 宋春彦, 王东. 羌塘盆地二叠系白云岩油苗地球化学特征及意义 . 沉积学报, 2017, 35(3): 611-620. doi: 10.14027/j.cnki.cjxb.2017.03.018
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[14]	. 滇东南丘北地区上二叠统吴家坪阶硅质岩地球化学特征及地质意义 . 沉积学报, 2013, 31(04): 621-629.
[15]	. 乌尔禾—风城地区二叠系白云质岩类岩石学特征及成因分析 . 沉积学报, 2012, 30(5): 859-868.
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[17]	郭建军. 柴窝堡凹陷达坂城次凹上二叠统烃源岩的地球化学特征及勘探方向 . 沉积学报, 2006, 24(3): 446-455.
[18]	何莹鲍志东沈安江申银民李明和. 塔里木盆地牙哈—英买力地区寒武系—下奥陶统白云岩形成机理 . 沉积学报, 2006, 24(06): 806-818.
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文章访问数: 1917
HTML全文浏览量: 5
PDF下载量: 775
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准噶尔盆地西北缘二叠系云质碎屑岩地球化学特征及成因机理研究

刊出日期: 2013-10-10

中图分类号: P618.130.2⁺1

关键词:

二叠系 /

摘要: 通过岩石学、碳氧同位素和元素地球化学等方法对准噶尔盆地西北缘二叠系云质碎屑岩特征进行了研究，分析了白云岩化机理并建立了白云岩化作用成因模式。结果表明，研究区岩石类型为白云质泥岩、白云质粉砂岩、白云化凝灰质粉砂岩和白云化凝灰质泥岩等，白云石化以交代湖相灰泥质和硅质（凝灰质）组分形成的自形或半自形的粉晶—细晶白云石为主，常见残余方解石和晚期方解石胶结物充填。岩石中 V/ Ni比（1.2～4.8）、Sr含量（95.5～782.2 μg/g）、Mg/Ca比（0.5～3.0）、有序度（0.36~0.98）、δ¹⁸O_PDB（-14.8‰～3.2‰）和δ¹³C_PDB（-1‰～5.2‰）的变化范围都较大。研究区云质岩类形成于水动力条件较弱、水体较深、相对安静的半闭塞陆相微咸—咸水湖湾环境，具多期次成因；二叠系时期构造运动复杂，断裂发育，火山活动频繁，不仅提供了白云石化过程中Mg²⁺的来源，且为富镁流体的快速流动和渗透提供了通道。综合研究认为本区的云质岩有准同生白云岩化、埋藏白云岩化和热液白云岩化三种成因类型。

Geochemical Characteristics and Genetic Mechanism of Permian Dolomitic Clastic Rocks in Northwestern Junggar Basin

Publish Date: 2013-10-10

Keywords:

Abstract: The types and lithology characters of Permian dolomitic clastic rocks in northwestern Junggar Basin are investigated by means of petrologic analysis, Xray indentification, carbon and oxygen isotope geochemistry and element geochemistry analysis, also analyzed Dolomization mechanism, Established dolomitization model. dolomitic clastic rocks in study areas include dolomitic mudstone, dolomitic siltstone, dolomitic tuffaceous siltstone, dolomitic tuffaceous shale,ect. And dolostones which are formed through dolomitization by replacing lacutrine plaster and siliceous (tuffaceous) components mainly consist of powderfine dolomites with automorphic or hypidiomorphic crystals, while residual calcite and late filled calcite cement commonly exist. The ratio of V/ Ni(1.2～4.8)content of Sr(95.5～782.2 μg/g)Mg/Ca(0.5～3.0),the degree of order(0.36~0.98)δ¹⁸O_PDB(14.8‰～3.2‰)and δ¹³C_PDB(1‰～5.2‰)all have larger variation range. The dolomitic rocks in this area mainly formed in a relatively weak hydrodynamic conditions, deep, peaceful, salt and lowsalt semiclosed terrestrial bay environment, have a characteristic of several stages and various causes. During Permian periods, in the researching zone the tectonics is complex, fault development, subtropical hot climate and frequent volcanic which provide favourable source of Mg²⁺ and permeability channel for the rich magnesium fluid fast flow. Comprehensive research show that these dolomitic rocks have three kinds of genetic types: Penecontemporaneous dolomitization, buried dolomitization, hydrothermal dolomitization.

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准噶尔盆地西北缘二叠系云质碎屑岩地球化学特征及成因机理研究

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Geochemical Characteristics and Genetic Mechanism of Permian Dolomitic Clastic Rocks in Northwestern Junggar Basin

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准噶尔盆地西北缘二叠系云质碎屑岩地球化学特征及成因机理研究

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Geochemical Characteristics and Genetic Mechanism of Permian Dolomitic Clastic Rocks in Northwestern Junggar Basin

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准噶尔盆地西北缘二叠系云质碎屑岩地球化学特征及成因机理研究

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出版历程

Geochemical Characteristics and Genetic Mechanism of Permian Dolomitic Clastic Rocks in Northwestern Junggar Basin

计量

出版历程

目录

准噶尔盆地西北缘二叠系云质碎屑岩地球化学特征及成因机理研究

English Abstract

Geochemical Characteristics and Genetic Mechanism of Permian Dolomitic Clastic Rocks in Northwestern Junggar Basin

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目录

友情链接

期刊在线

联系我们