Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1080/08120090500170419 |
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
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ISSN | 0812-0099 |
EISSN | 1440-0952 |
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 |
推荐引用方式 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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