Arid
DOI10.1080/08120090500170419
Geology and age of the Glikson impact structure, Western Australia
Macdonald, FA; Wingate, MTD; Mitchell, K
通讯作者Macdonald, FA
来源期刊AUSTRALIAN JOURNAL OF EARTH SCIENCES
ISSN0812-0099
EISSN1440-0952
出版年2005
卷号52期号:4-5页码:641-651
英文摘要

The Glikson structure is an aeromagnetic and structural anomaly located in the Little Sandy Desert of Western Australia (23 degrees 59’s, 121 degrees 34’E). Shatter cones and planar microstructures in quartz grains are present in a highly deformed central region, suggesting an impact origin. Circumferential shortening folds and chaotically disposed bedding define a 19 km-diameter area of deformation. Glikson is located in the northwestern Officer Basin in otherwise nearly flat-lying sandstone, siltstone and conglomerate of the Neoproterozoic Muncladjin! Formation, intruded by dolerite sills. The structure would not have been detected if not for its strong ring-shaped aeromagnetic anomaly, which has a 10 km inner diameter and a 14 km outer diameter. We interpret the circular magnetic signature as the product of truncation and folding of mafic sills into a ring syncline. The sills most likely correlate with dolerites that intrude the Boondawari Formation similar to 25 km to the north, for which we report a SHRIMP U-Pb baddeleyite and zircon age of 508 +/- 5 Ma, providing a precise older limit for the impact event that formed the Glikson structure.


英文关键词aeromagnetic anomalies baddeleyite Boondawari Formation Glikson impact structures Kalkarindji Large Igneous Province Mundadjini Formation Officer Basin planar microstructures shatter cones SHRIMP uranium-lead dating
类型Article
语种英语
国家USA ; Australia
收录类别SCI-E
WOS记录号WOS:000232802400013
WOS关键词ION MICROPROBE ; SHOCK METAMORPHISM ; STRATIGRAPHY ; BADDELEYITE ; ZIRCON ; QUARTZ ; CRATER ; BASIN ; DYKE ; MA
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
来源机构University of Western Australia
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/148545
作者单位(1)Harvard Univ, Div Earth & Planetary Sci, Cambridge, MA 02138 USA;(2)Univ Western Australia, Sch Earth & Geog Sci, Tecton Special Res Ctr, Crawley, WA 6009, Australia
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GB/T 7714
Macdonald, FA,Wingate, MTD,Mitchell, K. Geology and age of the Glikson impact structure, Western Australia[J]. University of Western Australia,2005,52(4-5):641-651.
APA Macdonald, FA,Wingate, MTD,&Mitchell, K.(2005).Geology and age of the Glikson impact structure, Western Australia.AUSTRALIAN JOURNAL OF EARTH SCIENCES,52(4-5),641-651.
MLA Macdonald, FA,et al."Geology and age of the Glikson impact structure, Western Australia".AUSTRALIAN JOURNAL OF EARTH SCIENCES 52.4-5(2005):641-651.
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