The critical factors of lithium enrichment in the metasedimentary wall rocks of granitic pegmatite -type lithium deposit: Insights from the Ke'eryin area in the eastern Songpan-Ganzi Belt.
文献类型：期刊论文
| 作者 | Hu FangYang1; Wu FuYuan3,5; Chen GuoHui4; Yang Lei2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2022-07-01 |
| 卷号 | 38期号:7页码:2017-2051 |
| ISSN号 | 1000-0569 |
| 关键词 | Songpan-Ganzi orogenic belt Ke'eryin area Metasedimentary rocks Biotite Lithium Rare metal deposit |
| 英文摘要 | The enrichment of rare metal elements in metasedimentary rocks is consider as an essential prerequisite of the formation of granitic pegmatite -type rare metal deposits. However, the causes and critical factors of enrichment of rare metal elements in metasedimentary rocks are still unclear. The Songpan-Ganzi orogenic belt, as an important enrichment zone of rare metals of China with many lithium deposits, is an ideal place to study the genetic relationship between the ore -related granite-pegmatites and metasedimentary rocks ( wall -rock). This study investigates various types of Triassic metasedimentary rocks away from the granitepegmatites at different distances in the Ke'eryin area, the eastern part of the Songpan-Ganzi orogenic belt. The Triassic metasedimentary rocks in the Ke'eryin area are dominated by metasandstones ( include hornfels) and quartz/mica schists, interlayered with thin -bedded of argillaceous phyllite or mica schists. Petrographically, these metasedimentary rocks include abundant quartz, biotite and muscovite. Metasandstone and quartz schist have higher SiO2 content and lower Al2O3, K20, T1.02 MgO, and Fe2O3 contents than mica schist and argillaceous phyllite, reflecting the control of quartz and biotite on the whole -rock composition. These samples have similar trace element compositions to the average upper continental crust but show various depletion of compatible elements ( e. g., Sr and Ni-Co), and enrichment of incompatible elements, e. g., Li ( 3 x 10(-6) similar to 997 x 10(-6)) and Cs. It is noteworthy that some samples have abnormally high lithium content ( > 300 x 10(-6)), together with high Cs and Sn abundances. Mg biotite and Fe biotite are the predominant type of biotite in these samples. Rare metals and volatiles, e. g., Li, Rb, Cs, Sn and F, vary greatly in these biotites and exhibit positive correlations between them. The median value of lithium in the metasedimentary rocks (50.4 x 10(-6)) is highly comparable to the average lithium content of the Indosinian intermediate -acid rocks in the surrounding orogens. Combining with previous studies on detrital zircons, it reflects the control of source materials on the Li content of sedimentary rocks. However, formation of ore -bearing melts directly from partial melting of metasedimentary rocks is impossible as it requires high fractionation of magma. The positive correlation between the Li and Cs, Sn, F in the metasedimentary rock and biotite indicates that lithium -rich melt -fluid is likely to be the cause of high Li content in the metasedimentary rocks. During the magma ascent and emplacement, the extraction of lithium from the wall rocks is negligible. On the contrary, it brings the lithium to the wall rocks. Lithium -rich metasedimentary rocks are spatially close related to the lithium deposits. By taking advantage of such a relationship, it may help locate the lithium deposits in specific areas, especially for high altitude and terribly undulate areas. |
| WOS关键词 | CENTRAL-IBERIAN ZONE ; MICAS ; LI ; FRACTIONATION ; RECOGNITION ; CONSTRAINTS ; PORPHYRY ; TIN |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000878167100012 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/107724]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Hu FangYang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chengdu Univ Technol, Coll Earth Sci, Chengdu 610059, Peoples R China 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 4.Hohai Univ, Sch Earth Sci & Engn, Nanjing 211100, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu FangYang,Wu FuYuan,Chen GuoHui,et al. The critical factors of lithium enrichment in the metasedimentary wall rocks of granitic pegmatite -type lithium deposit: Insights from the Ke'eryin area in the eastern Songpan-Ganzi Belt.[J]. ACTA PETROLOGICA SINICA,2022,38(7):2017-2051. |
| APA | Hu FangYang,Wu FuYuan,Chen GuoHui,&Yang Lei.(2022).The critical factors of lithium enrichment in the metasedimentary wall rocks of granitic pegmatite -type lithium deposit: Insights from the Ke'eryin area in the eastern Songpan-Ganzi Belt..ACTA PETROLOGICA SINICA,38(7),2017-2051. |
| MLA | Hu FangYang,et al."The critical factors of lithium enrichment in the metasedimentary wall rocks of granitic pegmatite -type lithium deposit: Insights from the Ke'eryin area in the eastern Songpan-Ganzi Belt.".ACTA PETROLOGICA SINICA 38.7(2022):2017-2051. |
入库方式： OAI收割
来源：地质与地球物理研究所
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