干旱区生态环境知识资源中心(Arid): Late Jurassic age for the Morokweng impact structure, southern Africa

Arid

DOI	10.1016/S0012-821X(97)00006-X
	Late Jurassic age for the Morokweng impact structure, southern Africa
	Hart, RJ; Andreoli, MAG; Tredoux, M; Moser, D; Ashwal, LD; Eide, EA; Webb, SJ; Brandt, D
通讯作者	Hart, RJ
来源期刊	EARTH AND PLANETARY SCIENCE LETTERS
ISSN	0012-821X
EISSN	1385-013X
出版年	1997
卷号	147 期号:1-4 页码:25-35
英文摘要	A roughly 70 km diameter circular feature buried beneath the Kalahari sands in South Africa is revealed on regional aeromagnetic maps. Boreholes drilled into the centre of the structure intercept a similar to 250 m thick sheet of quartz norite, interpreted as an impact melt, which overlies brecciated and shock; metamorphosed basement granite, Zircons recovered from the quartz norite, yield U-Pb ages of 145 +/- 0.8 Ma, and biotites provide Ar-Ar ages of 144 +/- 4 Ma, These data provide strong evidence for the occurrence of a Late Jurassic impact crater (the Morokweng impact structure) similar to 100 m beneath the surface.
英文关键词	Kalahari Desert impact craters geochemistry U/Pb Ar/Ar absolute age
类型	Article
语种	英语
国家	SOUTH AFRICA ; CANADA ; NORWAY
收录类别	SCI-E
WOS记录号	WOS:A1997WR84700005
WOS关键词	CRETACEOUS-TERTIARY BOUNDARY ; CHICXULUB CRATER ; EXTINCTION ; ANTARCTICA ; VOLCANISM ; EVOLUTION ; SEQUENCE ; IRIDIUM ; FACIES
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/134047
作者单位	(1)COUNCIL GEOSCI, PRETORIA, SOUTH AFRICA;(2)ATOM ENERGY CORP S AFRICA LTD, ZA-0001 PRETORIA, SOUTH AFRICA;(3)UNIV CAPE TOWN, DEPT GEOL SCI, ZA-7700 RONDEBOSCH, SOUTH AFRICA;(4)ROYAL ONTARIO MUSEUM, JACK SATTERLY GEOCHRONOL LAB, TORONTO, ON M5S 2C6, CANADA;(5)RAND AFRIKAANS UNIV, DEPT GEOL, ZA-2006 AUCKLAND PK, SOUTH AFRICA;(6)GEOL SURVEY NORWAY, N-7002 TRONDHEIM, NORWAY;(7)UNIV WITWATERSRAND, DEPT GEOPHYS, ZA-2050 WITWATERSRAND, SOUTH AFRICA;(8)UNIV WITWATERSRAND, DEPT GEOL, ZA-2050 WITWATERSRAND, SOUTH AFRICA
推荐引用方式 GB/T 7714	Hart, RJ,Andreoli, MAG,Tredoux, M,et al. Late Jurassic age for the Morokweng impact structure, southern Africa[J],1997,147(1-4):25-35.
APA	Hart, RJ.,Andreoli, MAG.,Tredoux, M.,Moser, D.,Ashwal, LD.,...&Brandt, D.(1997).Late Jurassic age for the Morokweng impact structure, southern Africa.EARTH AND PLANETARY SCIENCE LETTERS,147(1-4),25-35.
MLA	Hart, RJ,et al."Late Jurassic age for the Morokweng impact structure, southern Africa".EARTH AND PLANETARY SCIENCE LETTERS 147.1-4(1997):25-35.