期刊名称：Geological Survey of Denmark and Greenland Bulletin
印刷版ISSN：1604-8156
出版年度：2018
卷号：42
页码：115-126
语种：English
出版社：De Nationale Geologiske Undersoegelser for Danmark og Groenland
摘要：The fully cored borehole Blokelv-1 was drilled in 2008 to a depth of 233.8 m in southern Jameson Land, East Greenland (Fig. 1) to provide reservoir and source-rock information on the mudstone-dominated Upper Jurassic Hareelv Formation that also includes numerous gravityflow sandstones (Bjerager et al. 2018a, this volume). The East Greenland Caledonides, which form the basement for the Mesozoic succession, comprise a complex series of Archaean to Palaeozoic lithologies (Higgins & Leslie 2008), and therefore the post-Caledonian sedimentary successions preserved along the East and North-East Greenland coast (Fig. 1) are expected to contain a wide range of zircon age populations. Detrital zircon ages from Jurassic sediments in East Greenland have previously only been reported from the Lower Jurassic succession in the Jameson Land Basin where the elevated Liverpool Land High was the primary source area (Slama et al. 2011). Significantly different zircon age distributions are to be expected in the Upper Jurassic sediments in the Jameson Land Basin since the Liverpool Land High was gradually onlapped and drowned during the Middle Jurassic (Surlyk 2003). The present study employs zircon geochronology and heavy-mineral analysis to characterise the Upper Jurassic sandstones of the Hareelv Formation in the Blokelv-1 core and to identify the source areas of these sandstones.
