Stable isotopic studies and isotopic dating, Woodleigh Impact Structure, Western Australia: implications for the Late Devonian mass extinction

稳定同位素研究和同位素测年，Woodleigh撞击构造，西澳大利亚：晚泥盆纪大灭绝的影响。位于西澳大利亚州卡那封卡纳冯盆地的直径为120 km的伍德雷撞击构造是第三大中生代撞击构造。撞击蚀变矿物的K-Ar测年表明Woodleigh的年龄为晚泥盆世。将使用一系列分析方法研究撞击的确切时间、撞击体的性质和造成陨石成分重新分布的过程。将对与撞击有关的沉积物进行搜索，以确定是否可以识别外星成分并与Woodleigh相关联。预期的结果是证明晚泥盆世大灭绝的影响-灭绝联系，这是地球历史上最大的灭绝之一。

Stable isotopic studies and isotopic dating, Woodleigh Impact Structure, Western Australia: implications for the Late Devonian mass extinction. The 120 km diameter Woodleigh impact structure in the Carnarvon Basin, Western Australia is the third largest Phanerozoic impact structure. K-Ar dating of impact-induced alteration minerals indicates a Late Devonian age for Woodleigh. The precise timing of impact, nature of the impacting body and processes responsible for redistribution of meteoritic components will be investigated using a range of analytical methodologies. A search will be made for impact-related sedimentary deposits to see if an extraterrestrial component can be identified and correlated with Woodleigh. The expected outcome is proof of an impact-extinction connection for the Late Devonian mass extinction, one of the largest in Earth history.