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'Premier' evidence for prolonged kimberlite pipe formation and its influence on diamond transport from deep Earth

文献类型：期刊论文

作者Teppe, Sebastian1; Dongre, Ashish1; Liu, Chuan-Zhou2; Wu, Fu-Yuan2
刊名GEOLOGY
出版日期2018-10-01
卷号46期号:10页码:843-846
ISSN号0091-7613
DOI10.1130/G45097.1
英文摘要Volcanic pipes, or maar-diatreme volcanoes, form during explosive eruptions of mantle-derived magmas near Earth's surface. Impressive examples are the carrot-shaped, downward-tapering structures formed by kimberlite magmas. Kimberlites originate from >150 km depth within Earth's mantle beneath thick continental roots, away from tectonic plate margins. Kimberlite pipes can be significant diamond deposits, and the complex architecture revealed during exploration and mining is ascribed to repeated magma injections leading to multiple eruptions. Repeated magmatic pulses cause diatremes to widen and grow downward, forming kilometer-sized subterranean structures. However, the time-resolved evolution of kimberlite pipe systems is largely unknown. We present the first U/Pb perovskite ages for newly discovered kimberlite dikes (1139.8 +/- 4.8 Ma) that cut through the volcaniclastic infill of the Premier kimberlite pipe (1153.3 +/- 5.3 Ma) at Cullinan Diamond Mine, South Africa. The ages reveal that renewed kimberlite volcanic activity occurred, at a minimum, 3 m.y. after the main pipe formation. This finding suggests that the largest kimberlite pipes, and maar-diatreme volcanoes in general, may be magmatically active for several millions of years, which conflicts with this volcanism being described as monogenetic' at millennia time scales. Exemplified by Tier-1 diamond deposits on the Kaapvaal craton, long-lasting kimberlite volcanic activity may be an important factor in growing large diatremes, plus enabling effective transport of mantle cargo from the diamond stability field to Earth's surface.
WOS关键词SOUTHERN AFRICA ; U-PB ; PEROVSKITE ; CANADA ; VOLCANISM ; FIELD ; GEOCHRONOLOGY ; EXTENSION ; MANTLE ; AGE
资助项目National Research Foundation of South Africa (IPRR grant) ; National Research Foundation of South Africa (DST-NRF CIMERA grant)
WOS研究方向Geology
语种英语
WOS记录号WOS:000445256000003
出版者GEOLOGICAL SOC AMER, INC
资助机构National Research Foundation of South Africa (IPRR grant) ; National Research Foundation of South Africa (IPRR grant) ; National Research Foundation of South Africa (DST-NRF CIMERA grant) ; National Research Foundation of South Africa (DST-NRF CIMERA grant) ; National Research Foundation of South Africa (IPRR grant) ; National Research Foundation of South Africa (IPRR grant) ; National Research Foundation of South Africa (DST-NRF CIMERA grant) ; National Research Foundation of South Africa (DST-NRF CIMERA grant) ; National Research Foundation of South Africa (IPRR grant) ; National Research Foundation of South Africa (IPRR grant) ; National Research Foundation of South Africa (DST-NRF CIMERA grant) ; National Research Foundation of South Africa (DST-NRF CIMERA grant) ; National Research Foundation of South Africa (IPRR grant) ; National Research Foundation of South Africa (IPRR grant) ; National Research Foundation of South Africa (DST-NRF CIMERA grant) ; National Research Foundation of South Africa (DST-NRF CIMERA grant)
源URL[http://ir.iggcas.ac.cn/handle/132A11/88719]  
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Teppe, Sebastian
作者单位1.Univ Johannesburg, Dept Geol, POB 524, ZA-2006 Auckland Pk, South Africa
2.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		 Teppe, Sebastian,Dongre, Ashish,Liu, Chuan-Zhou,et al. 'Premier' evidence for prolonged kimberlite pipe formation and its influence on diamond transport from deep Earth[J]. GEOLOGY,2018,46(10):843-846.
APA Teppe, Sebastian,Dongre, Ashish,Liu, Chuan-Zhou,&Wu, Fu-Yuan.(2018).'Premier' evidence for prolonged kimberlite pipe formation and its influence on diamond transport from deep Earth.GEOLOGY,46(10),843-846.
MLA Teppe, Sebastian,et al."'Premier' evidence for prolonged kimberlite pipe formation and its influence on diamond transport from deep Earth".GEOLOGY 46.10(2018):843-846.

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来源：地质与地球物理研究所

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