| 西昆仑柳什塔格峰西侧火山岩的特征、时代及地质意义 |
| |
| 引用本文： | 李博秦 姚建新 王炬川 计文化 韩芳林. 西昆仑柳什塔格峰西侧火山岩的特征、时代及地质意义[J]. 岩石学报, 2007, 23(11): 2801-2810. |
| |
| 作者姓名： | 李博秦 姚建新 王炬川 计文化 韩芳林 |
| |
| 作者单位： | 李博秦（中国地质科学院地质研究所,北京,100037陕西省地质调查院,咸阳,712000）;姚建新（中国地质科学院地质研究所,北京,100037）;王炬川（陕西省地质调查院,咸阳,712000）;计文化（中国地质调查局西安地质矿产研究所,西安,710054）;韩芳林（陕西省地质调查院,咸阳,712000） |
| |
| 基金项目： | 中国地质调查局1:25万伯力克幅区域地质调查项目;国家自然科学基金;中国地质调查局资助项目;中-巴合作西构造结及邻区项目 |
| |
| 摘 要： | 在西昆仑麻扎-康西瓦-苏巴什结合带的柳什塔格一带发现了一套火山岩建造,主要由强蚀变玄武岩、绿帘阳起石岩、阳起石岩(原岩为玄武岩)组成,上覆少量深水沉积岩.火山岩的岩石地球化学特征表明其主要来源于富集地幔玄武岩浆,形成于洋岛环境,因此它是一个古结合带大洋洋壳的残留.采样作Rb-Sr等时线年龄分析,时代为震旦纪(563±48Ma),说明麻扎-康西瓦-苏巴什结合带所代表的洋盆在震旦纪就已经存在.这个发现对重新认识麻扎-康西瓦-苏巴什结合带的演化时限具有重要意义.
|
| 关 键 词： | 西昆仑 柳什塔格 火山岩 组成 时代 地质意义 |
| 修稿时间： | 2006-12-26 |
Composition, age and geological significance of the Liushitage volcanics in West Kunlun mountains |
| |
| Composition, age and geological significance of the Liushitage volcanics in West Kunlun mountains[J]. Acta Petrologica Sinica, 2007, 23(11): 2801-2810. |
| |
| Authors: | LI BoQin YAO JianXin WANG JuChuan JI WenHua HAN FangLin |
| |
| Abstract: | A suit of volcanics formation was found near the Liushitage area,in west Kunlun.And the volcanics formation composed of strongly corroded basalt,epidote actinolitite,actinolitite,and is covered by deep water sedimentary rocks.The geochemistry characteristics of volcanic rocks indicate that this volcanics originated from basaltic magma of enrichment mantle,which was formed in oceanic island,therefore the volcanic rocks is an ocean relic block of Paleo-suture zone.Dating of this volcanic sample by Rb-Sr isotopes shows the epoch,getting the isochrone age of 563 48Ma,is Sinian.The dating shows that the ocean of Mazha-Kangxiwa- Subashi suture zone was formed in Sinian.This discovery has great implication for recognizing evolution history of the Mazha-Kangwaxi- Subashi suture zone. |
| |
| Keywords: | West Kunlun Lishitage volcanics Composition Age Geological significance |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩石学报》浏览原始摘要信息 |
|
点击此处可从《岩石学报》下载全文 |
|
