Myers J S, Crowley J L
Department of Earth Sciences, Memorial University of Newfoundland, ST John's, Newfoundland, Canada A1B 3X5.
Precambrian Res. 2000;103(3-4):101-24. doi: 10.1016/s0301-9268(00)00089-9.
The Godthåbsfjord region of West Greenland contains the most extensive, best exposed and most intensely studied early Archean rocks on Earth. A geological record has been described of numerous magmatic events between ~3.9 and 3.6 Ga, and evidence of life at >3.85 Ga and ~3.8-3.7 Ga has been proposed from two widely-separated localities. Some of these claims have recently been questioned, and the nature of the best preserved remnants of the oldest known terrestrial volcanic and sedimentary rocks in the Isua greenstone belt are being reinvestigated and substantially reinterpreted. The first part of this article reviews the evolution of geological research and interpretations, outlining the techniques by which the geological history has been determined and the ensuing controversies. The second part re-examines crucial field evidence upon which the antiquity of the oldest terrestrial life is claimed from the island of Akilia.
西格陵兰的戈特霍布峡湾地区拥有地球上最广泛、暴露最完好且研究最深入的太古宙早期岩石。已经描述了约39亿年至36亿年之间众多岩浆活动的地质记录，并且在两个相距甚远的地点提出了38.5亿年以上以及约38亿年至37亿年存在生命的证据。最近，其中一些说法受到了质疑，伊苏阿绿岩带中保存最完好的已知最古老陆地火山岩和沉积岩残余的性质正在被重新研究并进行大幅重新解读。本文的第一部分回顾了地质研究和解释的演变，概述了确定地质历史所采用的技术以及随之而来的争议。第二部分重新审视了来自阿基利亚岛的、声称是最古老陆地生命古老性的关键实地证据。
