Perovskite U-Pb age and petrogenesis of the P-12 kimberlite from the Eastern Dharwar craton, southern India: Implications for a possible linkage to the 1110 Ma large igneous province
文献类型：期刊论文
| 作者 | Dongre, Ashish2; Lavhale, Prajakta2; Li, Qiu-Li1,3 |
| 刊名 | JOURNAL OF ASIAN EARTH SCIENCES
 |
| 出版日期 | 2021-06-15 |
| 卷号 | 213页码:12 |
| ISSN号 | 1367-9120 |
| 关键词 | P-12 kimberlite pipe Perovskite U-Pb dating 1110 Ma Large Igneous Province Eastern Dharwar craton Rodinia supercontinent |
| DOI | 10.1016/j.jseaes.2021.104750 |
| 英文摘要 | Petrology, bulk-rock geochemistry, and perovskite U-Pb age for the P-12 kimberlite pipe from the Wajrakarur kimberlite field, Eastern Dharwar craton (EDC) of southern India is reported. Pemvskites yielded a high-precision U-Pb age of 1122 +/- 7.7 Ma, taken to be an emplacement age of the host P-12 kimberlite pipe. The groundmass of coherent facies P-12 kimberlite contains monticellite, clinopyroxene, andradite, atoll spinel with titanomagnetite trend, and pemvskite with an elevated REE contents. Phlogopite shows restricted Al2O3 and TiO2 contents. Furthermore, olivines with a wider and higher range of core compositions (i.e. Mg# = 84-94) and multi-granular nodules are the hallmark features of the P-12 pipe. This assorted primary mineral content and its composition indicates the transitional nature of the P-12 towards the Kaapvaal lamproites. However, concentrations of bulkrock major and trace elements in the P-12 and other Wajrakarur kimberlites are similar to the global hypabyssal magmatic kimberlites. Large ion lithophile and high field strength elements (e.g. Ba and Nb) and their ratios (e.g. La/Nb and Th/Nb) suggest the presence of a heterogeneous and lithosphere influenced mantle source region which have been severely overprinted by metasomatizing fluids/melts emanating from the deep sourced upwelling mantle. The presence of such mixed and metasomatized mantle source regions likely to be an important factor for the transitional nature of the P-12 and other Mesopmterozoic kimberlites. Based on the availability of the newest emplacement ages, we propose a geodynamic model for the origin of kimberlites in the Indian subcontinent. The U-Pb age of 1122 +/- 7.7 Ma for the P-12 pipe shows its close temporal association to the emplacement of the recently proposed 1110 Ma Large Igneous Province (LIP), with plume center beneath the NW part of the Kalahari craton. Emplacement of the P-12 and other contemporaneous Indian kimberlites, therefore, marks the impingement of mantle plume which contributed heat and triggered partial melting of metasomatized lithospheric mantle without melt input. The eruption phase of similar to 100 million years (i.e. 1050-1153 Ma), for the kimberlites and related rocks in the Indian shield, does not appear to be continuous and can be separated into several short-durational magmatic events. For this reason, small-volume, volatile-rich magmatism during the Mesoproterozoic time in India is linked to the presence of a number of LIPs and associated mantle plumes during Columbia to Rodinia supercontinent transition and assembly of cratonic blocks of the latter. |
| WOS关键词 | ULTRAMAFIC LAMPROPHYRES ; LITHOSPHERIC MANTLE ; MESOPROTEROZOIC KIMBERLITES ; TECTONIC EVOLUTION ; WAJRAKARUR FIELD ; DYKE SWARMS ; GROUP-I ; INSIGHTS ; METASOMATISM ; GEOCHEMISTRY |
| 资助项目 | S.P. Pune University, Pune ; National Key Research and Development Program of China[2016YFE0203000] ; National Natural Science Foundation of China[41773044] ; National Natural Science Foundation of China[41673059] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| WOS记录号 | WOS:000647688200001 |
| 资助机构 | S.P. Pune University, Pune ; S.P. Pune University, Pune ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; S.P. Pune University, Pune ; S.P. Pune University, Pune ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; S.P. Pune University, Pune ; S.P. Pune University, Pune ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; S.P. Pune University, Pune ; S.P. Pune University, Pune ; National Key Research and Development Program of China ; National Key Research and Development Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/101176]  |
| 专题 | 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 | Dongre, Ashish |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 2.Savitribai Phule Pune Univ, Dept Geol, Pune 411007, Maharashtra, India 3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dongre, Ashish,Lavhale, Prajakta,Li, Qiu-Li. Perovskite U-Pb age and petrogenesis of the P-12 kimberlite from the Eastern Dharwar craton, southern India: Implications for a possible linkage to the 1110 Ma large igneous province[J]. JOURNAL OF ASIAN EARTH SCIENCES,2021,213:12. |
| APA | Dongre, Ashish,Lavhale, Prajakta,&Li, Qiu-Li.(2021).Perovskite U-Pb age and petrogenesis of the P-12 kimberlite from the Eastern Dharwar craton, southern India: Implications for a possible linkage to the 1110 Ma large igneous province.JOURNAL OF ASIAN EARTH SCIENCES,213,12. |
| MLA | Dongre, Ashish,et al."Perovskite U-Pb age and petrogenesis of the P-12 kimberlite from the Eastern Dharwar craton, southern India: Implications for a possible linkage to the 1110 Ma large igneous province".JOURNAL OF ASIAN EARTH SCIENCES 213(2021):12. |
入库方式： OAI收割
来源：地质与地球物理研究所
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