[1]兰叶芳,黄树光,任戍明,等.黔西北毕节地区中二叠统碳酸盐岩成岩作用[J].新疆石油地质,2018,(05):507.[doi:10.7657/XJPG20180502]
 LAN Yefang,HUANG Shuguang,REN Shuming,et al.Diagenesis of Middle Permian Carbonate Rocks in Bijie Area, Northwestern Guizhou[J].Xinjiang Petroleum Geology,2018,(05):507.[doi:10.7657/XJPG20180502]
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黔西北毕节地区中二叠统碳酸盐岩成岩作用()
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《新疆石油地质》[ISSN:1001-3873/CN:65-1107/TE]

卷:
期数:
2018年05期
页码:
507
栏目:
出版日期:
2018-10-01

文章信息/Info

Title:
Diagenesis of Middle Permian Carbonate Rocks in Bijie Area, Northwestern Guizhou
文章编号:
1001-3873(2018)05-0507-10
作者:
兰叶芳1黄树光2任戍明1周汝贤1
(1.贵州工程应用技术学院 矿业工程学院,贵州 毕节 551700;2.成都理工大学 沉积地质研究院,成都 610059)
Author(s):
LAN Yefang1 HUANG Shuguang2 REN Shuming1 ZHOU Ruxian1
(1.School of Mining Engineering, Guizhou University of Engineering Science, Bijie, Guizhou 551700, China; 2.Research Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China)
关键词:
贵州毕节地区中二叠统栖霞组茅口组碳酸盐岩成岩作用
Keywords:
Guizhou Bijie area Middle Permian Qixia formation Maokou formation carbonate rock diagenesis
分类号:
TE112.221
DOI:
10.7657/XJPG20180502
文献标志码:
A
摘要:
黔西北毕节地区中二叠统栖霞组和茅口组碳酸盐岩发育,地层出露良好。通过野外剖面的观察和实测,室内铸体薄片的鉴定、阴极发光分析以及碳氧同位素分析,结合区域地质背景和前人研究成果,认为黔西北毕节地区中二叠统碳酸盐岩的成岩作用具有如下特征:①中二叠统主要发育颗粒结构的灰岩和白云质灰岩(豹斑灰岩),岩石样品整体显示不发光—弱发光的阴极发光特征,碳同位素比值为1.2‰~4.6‰,表明岩石未受大气淡水的显著影响;②中二叠统碳酸盐岩受成岩改造作用强烈,发育海水潜流环境的泥晶化作用、海水渗流环境的等厚环边和马牙状方解石胶结作用、淡水渗流和潜流环境的等轴粒状—块状胶结和方解石的共轴生长、以及硅化作用、白云化作用和白云石的溶解作用、破裂作用、压实压溶作用等成岩作用,据此建立了相应的成岩演化序列;③硅化作用和白云化作用可能受到局部特殊热事件的影响,但具体的影响程度需要进一步的研究。
Abstract:
Carbonate rocks are well developed and exposed in the Middle Permian Xixia formation and Maokou formation in Bijie area, northwestern Guizhou. Based on field geological section observation and measurement, thin section identification, cathodoluminescence and carbon and oxygen isotope analysis, and combined with the regional background and previous research, the paper summarizes 3 diagenetic characteristics of the Middle Permian carbonate rocks in Bijie area. The first is that limestone and dolomitic limestone with grained textures are mainly developed in the Middle Permian, the rock samples from the stratum exhibit non-luminescence to weak luminescence with the carbon isotope ratio ranging from 1.2‰ to 4.6‰, indicating that the rocks weren’t significantly influenced by meteoric freshwater; the second is that the Middle Permian carbonate rocks suffered from strong diagenesis, and many types of diagenesis such as lithification of micrite under marine phreatic environment, cementation of rimmed, equal-thickness and horse tooth-like calcite under marine vadose environment, equiaxial granulous—blocky cementation and syntaxial overgrowth of calcite under fresh-water vadose and phreatic environments, silicification, dolomitization and dolomite dissolution, rupturing and compaction and pressure dissolution etc. are found and the corresponding diagenetic evolution sequences are established; the third is that silicification and dolomitization may be influenced by local special thermal events, but the influencing degree needs to be studied further.

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更新日期/Last Update: 2018-10-09