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| DOI | 10.1016/j.jseaes.2024.106076 |
| Petrogenesis of Mesozoic pegmatites in the Dahongliutan Li-mineralized belt (Western Kunlun, NW China) | |
| 发表日期 | 2024 |
| ISSN | 1367-9120 |
| EISSN | 1878-5786 |
| 起始页码 | 264 |
| 卷号 | 264 |
| 英文摘要 | The genesis of pegmatite and the associated Li-mineralization mechanism remain debated. The intimate temporal-spatial relationship between the pegmatites in the Dahongliutan Li-mineralized belt (incl. #509 Daoban and Akshay Li-poor pegmatites, and Akshay Li-rich pegmatite) and the Dahongliutan granite pluton allows us to discuss the origin of pegmatite and the Li-mineralization mechanism by conducting detailed geochemical and geochronological investigations on the two rock units in the Western Kunlun orogen (NW China). The Lipoor pegmatites in the Dahongliutan Li-mineralized belt exhibit similar or much lower Li, Rb, and Cs compared to the adjacent granite, and their epsilon Nd(t) values (-8.7--10.0) are significantly lower than those of the granite (-7.5--8.1) as well. However, the Akshay Li-rich pegmatite shows extremely high Li, Rb, Nb, Ta, and initial Sr isotopic ratios (0.7223-0.7227, obtained from apatite), in contrast to the Dahongliutan granite (ISr = 0.7108-0.7157). The whole-rock delta 7Li values of the Dahongliutan granite, pegmatites, and the wall-rock Bayanharshan Group metapelite are + 0.76-+5.67 %o, +0.8-+14.4 %o, and - 4.2-+2.8 %o, respectively. Zircon and cassiterite U-Pb dating yielded 206Pb/238U ages of 216 +/- 2 Ma and 195 +/- 2 Ma for the #509 Daoban Li-poor pegmatite and Akshay Li-rich pegmatite, respectively. Modeling of trace elements and Li isotopes suggests that the pegmatites in the Dahongliutan Li-mineralized belt did not originate from fractional crystallization of granitic magma. Instead, they may have formed through direct anatexis under amphibolite-facies conditions. Abundant Li-rich claystone, occasionally accompanied by evaporite, may exist in the magma source of the Li-rich pegmatite, which is the key factor controlling pegmatitic Li mineralization. |
| 英文关键词 | Pegmatite; Li mineralization; Dahongliutan Li -mineralized belt; Western Kunlun Orogen |
| 语种 | 英语 |
| WOS研究方向 | Geology |
| WOS类目 | Geosciences, Multidisciplinary |
| WOS记录号 | WOS:001200187000001 |
| 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/301722 |
| 作者单位 | Kunming University of Science & Technology; Southern University of Science & Technology; Shaoguan University |
| 推荐引用方式 GB/T 7714 | . Petrogenesis of Mesozoic pegmatites in the Dahongliutan Li-mineralized belt (Western Kunlun, NW China)[J],2024,264. |
| APA | (2024).Petrogenesis of Mesozoic pegmatites in the Dahongliutan Li-mineralized belt (Western Kunlun, NW China).JOURNAL OF ASIAN EARTH SCIENCES,264. |
| MLA | "Petrogenesis of Mesozoic pegmatites in the Dahongliutan Li-mineralized belt (Western Kunlun, NW China)".JOURNAL OF ASIAN EARTH SCIENCES 264(2024). |
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