Late Carboniferous bimodal volcanic rocks of the West Junggar Terrane, NW China: Implications for the postcollisional tectonic setting of the southwestern CAOB
文献类型：期刊论文
| 作者 | Wang, Xi; Wang, Ran; Qu, Pan; Cheng, Sanyou; Xin, Yonghui |
| 刊名 | INTERNATIONAL GEOLOGY REVIEW
 |
| 出版日期 | 2023 |
| 卷号 | 65期号:17页码:2644-2667 |
| 关键词 | KARAMAY OPHIOLITIC MELANGE PHANEROZOIC CRUSTAL GROWTH EASTERN TIANSHAN BELT U-PB GEOCHRONOLOGY TRACE-ELEMENT SR-ND GEOLOGICAL SIGNIFICANCE ISOTOPE EVIDENCE OCEANIC BASALTS NORTHWEST CHINA |
| ISSN号 | 0020-6814 |
| DOI | 10.1080/00206814.2022.2153387 |
| 英文摘要 | The West Junggar terrain (WJT), as a crucial part of the Central Asian Orogenic Belt (CAOB), is distributed with numerous igneous rocks, which provide critical information for crustal growth. However, the closure of the Junggar Ocean (JO) and the beginning of the postcollisional tectonic stage of the WJT have been controversial. This study delimited the regional lithologic units based on remote sensing geological mapping and recognized a series of bimodal volcanic rocks (BVR) in Hala'alate Mountain of the WJT. LA-ICP-MS zircon U-Pb geochronology and geochemistry were used to discuss the petrogenesis of the BVR and determine the stage of regional tectonic evolution. Geochronological results yield crystallization ages of 302 +/- 4 Ma, 298 +/- 2 Ma, 304 +/- 1 Ma, and 303 Ma +/- 2Ma +/- 2 Ma for the basaltic andesite, basaltbasalt, and two rhyolitic samples, respectively. Basalts and basaltic andesites are calc-alkaline, and display enrichment in light rare earth elements (LREEs) and large ion lithophile elements (LILEs) and depletion in high field strength elements (HFSEs). Notably, basaltic andesites in this area were once misjudged as sanukitoids owing to their low contents of Mg-#, Ni, CrCr, and other characteristics that are inconsistent with the typical definition of sanukitoids. The rhyolites are A(2)-type granitoids with high SiO2 contents and are depleted in Nb, Ta, P, Ti, and Sr, showing enriched LREE patterns with negative Eu anomalies. These features indicate that the magma of the mafic end-member of the BVR is derived from the partial melting of the depleted lithospheric mantle, whereas the felsic end-member magma can be associated with the remelting of the lower crust due to the upwelling and underplating of mafic magma. In combination with previous studies of simultaneouslysimultaneous basic dykesdikes and felsic rocks, a postcollisional tectonic stage was proposed for the WTJ during the late Carboniferous, suggesting that the JO was closed. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000893296900001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/80384]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 推荐引用方式 GB/T 7714 | Wang, Xi,Wang, Ran,Qu, Pan,et al. Late Carboniferous bimodal volcanic rocks of the West Junggar Terrane, NW China: Implications for the postcollisional tectonic setting of the southwestern CAOB[J]. INTERNATIONAL GEOLOGY REVIEW,2023,65(17):2644-2667. |
| APA | Wang, Xi,Wang, Ran,Qu, Pan,Cheng, Sanyou,&Xin, Yonghui.(2023).Late Carboniferous bimodal volcanic rocks of the West Junggar Terrane, NW China: Implications for the postcollisional tectonic setting of the southwestern CAOB.INTERNATIONAL GEOLOGY REVIEW,65(17),2644-2667. |
| MLA | Wang, Xi,et al."Late Carboniferous bimodal volcanic rocks of the West Junggar Terrane, NW China: Implications for the postcollisional tectonic setting of the southwestern CAOB".INTERNATIONAL GEOLOGY REVIEW 65.17(2023):2644-2667. |
入库方式： OAI收割
来源：广州地球化学研究所
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