| 基性岩侵入对页岩矿物学特征的影响:以松辽盆地嫩江组为例 |
| |
| 引用本文： | 王岩,荣辉,焦养泉,徐尚,贾俊民,曹民强,程璇. 基性岩侵入对页岩矿物学特征的影响:以松辽盆地嫩江组为例[J]. 地球科学, 2021, 46(6): 2188-2203. DOI: 10.3799/dqkx.2020.177 |
| |
| 作者姓名： | 王岩 荣辉 焦养泉 徐尚 贾俊民 曹民强 程璇 |
| |
| 作者单位： | 中国地质大学构造与油气资源教育部重点实验室,湖北武汉 430074;辽河石油勘探局新能源开发公司,辽宁盘锦 124010 |
| |
| 基金项目： | 国家重点研发计划项目2018YFC0604202国家青年科学基金项目41502105中国地质大学（武汉）学科杰出人才基金项目102-162301192664 |
| |
| 摘 要： | 已有研究表明岩浆侵入对页岩矿物学特征产生影响,然而对其影响范围及程度缺少精细解剖,制约了岩浆活动对页岩矿物学特征影响机理的准确认识.以松辽盆地南部与辉绿岩接触的嫩江组页岩为对象,利用岩心观察、XRD、偏光显微镜及扫描电镜等手段,将接触带页岩距辉绿岩由远及近划分为5个带:(1)灰色页岩带,厚19 m,(2)深灰色页岩带,...
|
| 关 键 词： | 基性岩 页岩 嫩江组 松辽盆地 石油地质 |
| 收稿时间： | 2020-03-30 |
Effects of Basic Intrusions on Shale Mineralogy:A Case Study from Nenjiang Formation in Songliao Basin |
| |
| Wang Yan,Rong Hui,Jiao Yangquan,Xu Shang,Jia Junmin,Cao Minqiang,Cheng Xuan. Effects of Basic Intrusions on Shale Mineralogy:A Case Study from Nenjiang Formation in Songliao Basin[J]. Earth Science-Journal of China University of Geosciences, 2021, 46(6): 2188-2203. DOI: 10.3799/dqkx.2020.177 |
| |
| Authors: | Wang Yan Rong Hui Jiao Yangquan Xu Shang Jia Junmin Cao Minqiang Cheng Xuan |
| |
| Abstract: | Existing studies have shown that magmatic intrusion has effects on shale mineralogical characteristics, but the lack of a detailed anatomy of its scope and extent has restricted the accurate understanding of the influence mechanism of magmatic activities on shale mineralogical characteristics.Based on contact with diabase in southern Songliao basin shale as an object of the Nenjiang Formation, by means of core observation, XRD, polarizing microscope, and scanning electron microscopy, the contact zone shale is divided from the diabase intrusion from far and near into five zones: gray shale zone, 19 m thick; dark gray shale zone, thick 11 m; gray-black shale zone, 12.9 m thick; blue-gray shale zone, 1.5 m thick; gray-white shale zone, 2.2 m thick. Quartz content increases, with average contents of 27.0%, 33.6%, 51.7%, 56.7%, and 52.7%, respectively. The transition from terrestrial clastic quartz to high-temperature in-situ quartz (microcrystalline self-shaped quartz and microcrystalline spherical quartz), the recrystallization phenomenon intensified. The content of feldspar increases, with average contents of 8.8%, 12.0%, 14.0%, 15.1%, and 18.2%, respectively, which changes from semi-morphic to semi-self-shaped, and the recrystallization phenomenon intensified. The content of carbonate minerals decreases first and then increased, with the average contents of 9.0%, 10.0%, 7.5%, 4.5%, and 6.0%, respectively. The shape of siderite and calcite changes from self-shaped to colloidal and veined. The pyrite content gradually decreases, with average contents of 5.4%, 3.5%, 1.0%, 0%, and 0%, respectively, and transformed from strawberry-like and self-shaped to other-shaped granular. The clay mineral content gradually decreases, with average contents of 46.0%, 36.5%, 22.5%, 20.1%, and 19.0%, respectively, transformed from platy montmorillonite to floc illite.The results show that the intrusion of basic rock into shale not only accelerates the diagenetic evolution of shale, but also increases the brittle minerals and decreases the plastic minerals, which can improve the brittleness and compressibility of shale reservoirs but weaken the ability of shale gas to exist. |
| |
| Keywords: | |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《地球科学》浏览原始摘要信息 |
|
点击此处可从《地球科学》下载免费的PDF全文 |
|
