| 田振,孙健,赵振英.青海石底泉构造混杂岩带物质组成及其地质意义[J].矿产勘查,2018,9(10):1862-1868 |
| 青海石底泉构造混杂岩带物质组成及其地质意义 |
| Composition and Geological Significance of Tectonic Melanges in Shidiquan Area of Delingha, QingHai |
| 投稿时间：2017-12-24 |
| DOI： |
| 中文关键词: 石底泉 构造混杂岩带 华力西晚期-印支期 构造变形 |
| 英文关键词: Shidiquan area, tectonic melanges, late Variscan-Indosinian, deformation |
| 基金项目:中国地质调查局地质大调查项目青海省德令哈市大煤沟地区J47E015001、J47E016001 两幅1∶5万区域地质矿产调查(编号:12120113028400)资助。 |
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| 中文摘要: |
| 在1∶5万地质填图的基础上,运用剖面绘制、岩石学等方法,对工作区内宗务隆构造带--石底泉地区构造混杂岩带进行了详细研究。结果表明:石底泉构造混杂岩带组成复杂,均由基质和不同性质的构造岩块两部分构成,其中构造岩块以土尔根大坂组地层岩块和达肯大坂岩群基底岩块为主,基质主要为中浅部构造层次的构造片岩；石底泉构造混杂带的构造变形可分为两个阶段:华里西晚期-印支期和喜山期。其中华里西晚期-印支期为主构造期；石底泉地区构造混杂岩带的厘定是宗务隆构造带的又一重要证据,它与该区前人岩石学、年代学证据一起构成混杂岩带的完整标志,对恢复该地区古板块体制及构造演化具有重要意义。 |
| 英文摘要: |
| Based on 1∶50 000 regional geological mapping in the Shidiquan area, by using methods of detailed field section measurement and petrologic analysis, the author conducted detailed study on the Zongwulong tectonic belts in Shidiquan area. The results show that the composition of tectonic melanges in Shidiquanarea is complex, which is composed of matrix and tectonic massif with different properties. The tectonic massif mainly consists of Tuergendaban formation rocks and Dakendaban base rocks, and the matrix mainly is tectonic schist from middle-shallow crust. The tectonic evolution of Shidiquan tectonic melange belt can be divided into 2 stages:late Variscan-Indosinian and Himalayan, the late Variscan-Indosinian is the main tectonic period. The confirmation of the tectonic melange belt in the Shidiquan area is another important evidence for the Zongwulong tectonic belt, which, together with the predecessors' petrological and chronological evidence, constitute a complete sign for the tectonic melange belt, and has important significance for the recovery of the region plate system and tectonic evolution. |
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