文章基本信息

标题：Palaeovalleys at the basal unconformity of the Palaeoproterozoic Karrat Group, West Greenland
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作者：Pierpaolo Guarnieri ; Camille A. Partin ; Diogo Rosa 等
期刊名称：Geological Survey of Denmark and Greenland Bulletin
印刷版ISSN：1604-8156
出版年度：2016
卷号：35
页码：63-66
语种：English
出版社：De Nationale Geologiske Undersoegelser for Danmark og Groenland
摘要：In the Rinkian belt of West Greenland, reworked Archaean gneisses are overlain by supracrustal successions of thePalaeoproterozoic Karrat Group, defined by Henderson &Pulvertaft (1967) as comprising two formations: the Qeqertarssuaq Formation and the Nûkavsak Formation. The groupwas later extended to include the Mârmorilik Formation(Henderson & Pulvertaft 1987) originally considered to beof Archaean age (Henderson & Pulvertaft 1967) but latershown to be Palaeoproterozoic, resting with a depositionalunconformity on Archaean gneiss (Garde 1978). Henderson & Pulvertaft (1987) suggested that the carbonatedominated Mârmorilik Formation in the south was laterally equivalent to the siliciclastic-dominated QeqertarssuaqFormation in the north, the two subbasins being separatedby a basement topographic high.