###
地质力学学报:2021,27(1):135-152
本文二维码信息
码上扫一扫!
内蒙古高尧乌拉白音高老组地质及年代学特征
(1.河北地质大学, 河北 石家庄 050031;2.中国地质大学地球科学与资源学院, 北京 100083;3.天津地质矿产研究所, 天津 300170)
Geological and chronological characteristics of the Baiyin'gaolao Formation in Gaoyaowula, Inner Mongolia
(1.Heibei GEO University, Shijiazhuang 050031, Hebei, China;2.School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China;3.Tianjin Institute of Geology and Mineral Resources, Tianjin 300170, China)
摘要
图/表
参考文献
相似文献
本文已被:浏览 91次   下载 86
投稿时间:2019-10-15    修订日期:2020-03-25
中文摘要: 通过1:50000区域地质调查,运用"火山构造-岩性岩相-火山地层"三重填图方法,将内蒙古东乌旗高尧乌拉白音高老组划分为3个岩性段,一段为火山碎屑沉积岩,二段为中性火山岩,三段为酸性火山岩,构成一个完整的沉积-喷发旋回。早期至晚期岩浆具有由中性向酸性演化的特征。划分出爆发相、侵出相、溢流相、火山通道相、喷发-沉积相及潜火山相等火山岩相;圈出12个Ⅴ级火山机构。获得高尧乌拉白音高老组二段粗安岩和三段流纹岩的LA-ICP-MS锆石U-Pb年龄分别为128.2±0.9 Ma和125.5±0.5 Ma,表明其形成时代为早白垩世。
Abstract:Based on a regional geological survey at a scale of 1:50000, it reveals that the volcanic rocks from the Baiyin'gaolao Formation of Gaoyaowula in Inner Mongolia could be divided into three lithologic segments by the triple mapping method of "volcanic structure-lithology and lithofacies-volcanic formation". The first lithologic segment is composed of pyroclastic sedimentary rocks, the second intermediate volcanic rocks and the third acidic volcanic rocks. The three lithologic segments constitute a complete depositonal-eruptive cycle, and the early to late magma is characterized by a transition from neutral to acid. The Baiyin'gaolao Formation can be classified into eruptive facies, intrusive facies, overflow facies, volcanic vent facies, eruption-deposition facies and subvolcanic facies, etc. Twelve V-grade volcanic apparatuses are delineated. The Zircon U-Pb LA-ICP-MS dating of the trachyandesite from the second lithologic segment of the Baiyin'gaolao Formation of Gaoyaowula and the rhyolite from the third are 128.2±0.9 Ma and 125.5±0.5 Ma respectively, indicating that the formation age is early-Cretaceous.
文章编号:     中图分类号:P597    文献标志码:
基金项目:国家自然科学基金项目(41502211,41972061);中国地质调查局地质调查项目(1212011120711,12120114064201,DD20190004,DD20160039,DD20160041)
引用文本:
董培培,李英杰,王根厚,等,2021.内蒙古高尧乌拉白音高老组地质及年代学特征[J].地质力学学报,27(1):135-152.DOI:10.12090/j.issn.1006-6616.2021.27.01.014
DONG Peipei,LI Yingjie,WANG Genhou,et al,2021.Geological and chronological characteristics of the Baiyin'gaolao Formation in Gaoyaowula, Inner Mongolia[J].Journal of Geomechanics,27(1):135-152.DOI:10.12090/j.issn.1006-6616.2021.27.01.014

用微信扫一扫

用微信扫一扫