| 内蒙古德莫哈达盆地白音高老组地层层序及时代研究新进展 |
| |
| 引用本文： | 林敏.内蒙古德莫哈达盆地白音高老组地层层序及时代研究新进展[J].地质通报,2018,37(9):1588-1598. |
| |
| 作者姓名： | 林敏 |
| |
| 作者单位： | 中国地质大学(武汉);福建省地质调查研究院 |
| |
| 基金项目： | 中国地质调查局项目《内蒙古1∶50000乌力牙斯台、南斯衲根达巴、霍布仁布敦、查干敖包等2幅区域地质矿产调查》（编号：DD20160048-06） |
| |
| 摘 要： | 德莫哈达火山喷发盆地是大兴安岭南段晚中生代重要的火山喷发盆地之一,通过系统剖面研究及路线调查认为,德莫哈达火山喷发盆地由白音高老组火山岩组成,划分为3个岩性段,在白音高老组顶部划分出偏碱性火山岩段,构成一个完整的沉积-喷发旋回。盆地火山岩相有8种类型,圈定了9个Ⅴ级火山机构,受北北东向断裂控制明显。根据锆石U-Pb同位素测年,盆地火山活动时期为128~125Ma,为早白垩世。
|
| 关 键 词： | 德莫哈达 火山作用 白音高老组 早白垩世 内蒙古 |
| 收稿时间： | 2018/2/5 0:00:00 |
| 修稿时间： | 2018/3/5 0:00:00 |
New progress in the study of stratigraphic sequence and epoch of Baiyin'gaolao Formation in Demohada basin, In-ner Mongolia |
| |
| LIN Min.New progress in the study of stratigraphic sequence and epoch of Baiyin''gaolao Formation in Demohada basin, In-ner Mongolia[J].Geologcal Bulletin OF China,2018,37(9):1588-1598. |
| |
| Authors: | LIN Min |
| |
| Institution: | China University of Geosciences(Wuhan), Wuhan 430072, Hubei, China;Fujian Institute of Geological Survey, Fuzhou 350013, Fujian, China |
| |
| Abstract: | The Demohada volcanic-eruption basin is one of the most important Late Mesozoic volcanic basins in southern Da Hing-gan Mountains. It is considered that the Demohada volcanic-eruption basin is composed of volcanic rocks of Baiyin''gaolao Forma-tion, which is divided into three lithologic segments and constitutes a total sedimentary and eruption cycle. The volcanic rocks have eight types with nine V-grade volcanic apparatuses, obviously controlled by NNE-trending faults. The results of zircon U-Pb dating show that the volcanic activity of the basin occurred mostly from 128Ma to 125Ma, suggesting Early Cretaceous. |
| |
| Keywords: | Demohada volcanism Baiyin''gaolao Formation Early Cretaceous Inner Mongolia |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《地质通报》浏览原始摘要信息 |
| 点击此处可从《地质通报》下载免费的PDF全文 |
|
