太原西山煤田骆驼脖子砂岩特征及物源区分析

发布时间：2018-05-01 00:36

本文选题：骆驼脖子砂岩 + 物源区分析　；参考：《煤田地质与勘探》2017年04期

【摘要】：为了判断太原西山煤田物源区,并探讨物源区构造背景,运用砂岩单碎屑组分法、多碎屑组分法和重矿物组合法,综合分析了七里沟剖面二叠系下石盒子组底部骆驼脖子砂岩的特征。结果表明:骆驼脖子砂岩主要组分为石英和岩屑,石英占80%以上,岩屑占10%左右,长石极少见,体积分数小于1%,且石英和岩屑成因类型以岩浆岩型和变质岩型为主,沉积岩型含量较少;重矿物主要由锆石、磷灰石和金红石组成,揭示出物源区母岩类型为酸性岩浆岩,物源区为北面阴山古陆,砂岩组分的Dickinson三角图解表明,物源区构造背景为再旋回造山带。
[Abstract]:In order to judge the source area of Xishan coalfield in Taiyuan, and to discuss the tectonic background of the source area, the single clastic component method of sandstone, the method of multi-clastic component and the method of heavy mineral combination are used. The characteristics of Camel neck sandstone at the bottom of the Lower Shihezi formation in the Qiligou section of the Permian are comprehensively analyzed. The results show that the main components of Camel necked sandstone are quartz and lithic, quartz is more than 80%, lithic is about 10%, feldspar is rare, volume fraction is less than 1, and the genetic types of quartz and lithic are magmatic and metamorphic. The heavy minerals are mainly composed of zircon, apatite and rutile, which reveal that the source rocks are acidic magmatic rocks, and the provenance is the northern Yinshan paleocontinent. The Dickinson triangulation of sandstone components shows that the source rocks of the sedimentary rocks are mainly composed of zircon, apatite and rutile. The tectonic setting of the provenance area is a recycle orogenic belt.
【作者单位】：中国地质大学(北京)能源学院;太原理工大学矿业工程学院;
【基金】：国家自然科学基金项目(41272175)~~
【分类号】：P618.11

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