印度南部达瓦尔克拉通西部镁质岩脉中斜辉石的微量元素地球化学特征

IF 0.9 4区地球科学 Q4 MINERALOGY

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-04-27 DOI:10.2465/JMPS.201130C

S. Silpa, M. Satish‐Kumar, E. Takazawa, K. Sajeev

{"title":"印度南部达瓦尔克拉通西部镁质岩脉中斜辉石的微量元素地球化学特征","authors":"S. Silpa, M. Satish‐Kumar, E. Takazawa, K. Sajeev","doi":"10.2465/JMPS.201130C","DOIUrl":null,"url":null,"abstract":"The major and trace element characteristics of the clinopyroxene from two generations of dykes, dolerite and olivine dolerite dykes of Western Dharwar Craton were investigated by using electron microprobe and LA – ICPMS. The clinopyroxene in dolerite dykes show a compositional zoning with Mg# decreasing from the core to the rim (85 to 51) and Cr 2 O 3 contents decrease towards the rim. The trace and rare earth element (REE) pattern of the core shows lower concentrations of REEs compared to the rim. The clinopyroxene in the olivine dolerites are devoid of zoning and compositionally more primitive than the dolerites as visible in the trace element and REE concentrations. The dolerite and olivine dolerite are formed from di ﬀ erent source magmas and the fractional crystallization of clinopyroxene is dominant in dolerites. The present estimated melt composition in equilibrium with clinopyroxene is consistent with the bulk rock composition for dolerite and olivine dolerite.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":" ","pages":""},"PeriodicalIF":0.9000,"publicationDate":"2021-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Trace and rare earth element geochemistry of clinopyroxene in mafic dykes from Western Dharwar craton, southern India\",\"authors\":\"S. Silpa, M. Satish‐Kumar, E. Takazawa, K. Sajeev\",\"doi\":\"10.2465/JMPS.201130C\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The major and trace element characteristics of the clinopyroxene from two generations of dykes, dolerite and olivine dolerite dykes of Western Dharwar Craton were investigated by using electron microprobe and LA – ICPMS. The clinopyroxene in dolerite dykes show a compositional zoning with Mg# decreasing from the core to the rim (85 to 51) and Cr 2 O 3 contents decrease towards the rim. The trace and rare earth element (REE) pattern of the core shows lower concentrations of REEs compared to the rim. The clinopyroxene in the olivine dolerites are devoid of zoning and compositionally more primitive than the dolerites as visible in the trace element and REE concentrations. The dolerite and olivine dolerite are formed from di ﬀ erent source magmas and the fractional crystallization of clinopyroxene is dominant in dolerites. The present estimated melt composition in equilibrium with clinopyroxene is consistent with the bulk rock composition for dolerite and olivine dolerite.\",\"PeriodicalId\":51093,\"journal\":{\"name\":\"Journal of Mineralogical and Petrological Sciences\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2021-04-27\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Mineralogical and Petrological Sciences\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://doi.org/10.2465/JMPS.201130C\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MINERALOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Mineralogical and Petrological Sciences","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.2465/JMPS.201130C","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MINERALOGY","Score":null,"Total":0}

引用次数: 2

摘要

利用电子探针和LA - ICPMS研究了西达瓦尔克拉通两代白云岩和橄榄白云岩岩脉中斜辉石的主量元素和微量元素特征。白云岩岩脉中斜辉石的组成呈现出从岩心到岩缘(85 ~ 51)Mg#含量递减，Cr 2o3含量向岩缘递减的带状结构。岩心的微量元素和稀土元素(REE)模式表明，与边缘相比，岩心的REE浓度较低。橄榄石白云岩中的斜辉石缺乏分带性，在微量元素和稀土元素含量上比白云岩更原始。白云岩与橄榄石白云岩形成于不同来源的岩浆中，斜辉石的分异结晶在白云岩中占主导地位。目前估算的斜辉石平衡熔体组成与玄武岩和橄榄石玄武岩的整体岩石组成一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Trace and rare earth element geochemistry of clinopyroxene in mafic dykes from Western Dharwar craton, southern India

The major and trace element characteristics of the clinopyroxene from two generations of dykes, dolerite and olivine dolerite dykes of Western Dharwar Craton were investigated by using electron microprobe and LA – ICPMS. The clinopyroxene in dolerite dykes show a compositional zoning with Mg# decreasing from the core to the rim (85 to 51) and Cr 2 O 3 contents decrease towards the rim. The trace and rare earth element (REE) pattern of the core shows lower concentrations of REEs compared to the rim. The clinopyroxene in the olivine dolerites are devoid of zoning and compositionally more primitive than the dolerites as visible in the trace element and REE concentrations. The dolerite and olivine dolerite are formed from di ﬀ erent source magmas and the fractional crystallization of clinopyroxene is dominant in dolerites. The present estimated melt composition in equilibrium with clinopyroxene is consistent with the bulk rock composition for dolerite and olivine dolerite.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Journal of Mineralogical and Petrological Sciences 地学-矿物学

CiteScore

1.80

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Mineralogical and Petrological Sciences (JMPS) publishes original articles, reviews and letters in the fields of mineralogy, petrology, economic geology, geochemistry, planetary materials science, and related scientific fields. As an international journal, we aim to provide worldwide diffusion for the results of research in Japan, as well as to serve as a medium with high impact factor for the global scientific communication Given the remarkable rate at which publications have been expanding to include several fields, including planetary and earth sciences, materials science, and instrumental analysis technology, the journal aims to encourage and develop a variety of such new interdisciplinary scientific fields, to encourage the wide scope of such new fields to bloom in the future, and to contribute to the rapidly growing international scientific community. To cope with this emerging scientific environment, in April 2000 the journal''s two parent societies, MSJ* (The Mineralogical Society of Japan) and JAMPEG* (The Japanese Association of Mineralogists, Petrologists and Economic Geologists), combined their respective journals (the Mineralogical Journal and the Journal of Mineralogy, Petrology and Economic Geology). The result of this merger was the Journal of Mineralogical and Petrological Sciences, which has a greatly expanded and enriched scope compared to its predecessors.