Climate Change Data Portal
| DOI | 10.1016/j.jseaes.2024.106066 |
| Early Cretaceous mafic rocks in the Tethyan Himalaya igneous province, Tibet: Implications for the eastern Gondwana breakup | |
| 发表日期 | 2024 |
| ISSN | 1367-9120 |
| EISSN | 1878-5786 |
| 起始页码 | 264 |
| 卷号 | 264 |
| 英文摘要 | Geochronological, geochemical, and Sr-Nd isotope data for the mafic rocks from Cuona and Zhegucuo areas, Southern Tibet are presented to understand better the connection between the Kerguelen mantle plume and the breakup of eastern Gondwana. Zircon U-Pb dating yielded a concordant, weighted-mean 206Pb/238U age of 131 Ma for the Zhegucuo diabases. Compared to the Cuona basalts, the Zhegucuo diabases have higher Mg# values and MgO, Ni, and Cr contents closer to those of primary mantle melts. The Cuona basalts have ocean island basalt-like compositions, including light rare-earth element enrichments, positive Nb-Ta anomalies, and positive epsilon Nd(t) values (+1.20 to +2.97). The Zhegucuo diabases are characterized by Nb depletion, Zr and Hf enrichment, and negative epsilon Nd(t) values (-2.71 to -2.26). Modeling implies that low degrees (4--7%) of partial melting of garnet lherzolites (3-5 % garnet) within the Kerguelen mantle plume can produce Cuona basalts. However, the Zhegucuo diabases were formed by similar degrees (4-7%) of partial melting of spinel-bearing lherzolite (2 vol% spinel) in the shallow enriched lithospheric mantle. The positive anomalies of Zr-Hf in the Zhegucuo diabases are because their sources have melted. The Tethyan Himalaya underwent lithospheric thinning during the Early Cretaceous, resulting from the impact of the Kerguelen mantle plume. The breakup of eastern Gondwana could have been a combination of the reactivation of the former suture zone and the arrival of a new mantle plume beneath the Tethyan Himalaya. |
| 英文关键词 | Kerguelen mantle plume; Tethyan Himalaya igneous province; Early Cretaceous; Lithospheric thinning |
| 语种 | 英语 |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001183475000001 |
| 来源期刊 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/308670 |
| 作者单位 | China University of Geosciences; China University of Geosciences |
| 推荐引用方式 GB/T 7714 | . Early Cretaceous mafic rocks in the Tethyan Himalaya igneous province, Tibet: Implications for the eastern Gondwana breakup[J],2024,264. |
| APA | (2024).Early Cretaceous mafic rocks in the Tethyan Himalaya igneous province, Tibet: Implications for the eastern Gondwana breakup.JOURNAL OF ASIAN EARTH SCIENCES,264. |
| MLA | "Early Cretaceous mafic rocks in the Tethyan Himalaya igneous province, Tibet: Implications for the eastern Gondwana breakup".JOURNAL OF ASIAN EARTH SCIENCES 264(2024). |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
