Fluid inclusion evidence for a Cretaceous-Palaeogene petroleum system, Kangerlussuaq Basin, East Greenland
Fluid inclusion evidence for a Cretaceous-Palaeogene petroleum system, Kangerlussuaq Basin, East Greenland
复制标题
DOI：
10.1016/j.marpetgeo.2005.01.002
复制
发表时间：
2005-03
影响因子：
4.2
通讯作者：
R. Jonk;J. Parnell;A. Whitham
中科院分区：
文献类型：
--
作者：
R. Jonk;J. Parnell;A. Whitham
岩石学和流体包裹体的砂岩样品从古近纪Kangerlussuaq盆地的研究揭示了存在的石油包裹体作为次级痕迹穿过颗粒。流体包裹体岩相学和显微测温研究表明，石油在超过约108 ° C的温度下被捕获。虽然由于深埋（超过6公里）和随后的剥露，Kangerlussuaq盆地本身不能被认为是石油的前景，但它为北大西洋边缘附近的盆地提供了一个有用的类比。鉴于盆地中没有比Aptian-Albian更古老的沉积物，可以排除常规的上侏罗纪烃源岩。石油可能是从Aptian-Albian河口泥岩中生成的，其作为区域烃源岩的潜力需要评估。油包裹体也出现在横切整个沉积剖面的注入砂岩中，这些砂岩可能充当了石油运移的通道。它们存在于第三纪玄武岩下面的北大西洋近海盆地中，也需要在游戏概念中加以考虑。
Petrographic and fluid inclusion studies of sandstone samples from the Cretaceous–Palaeogene Kangerlussuaq basin reveal the presence of oil inclusions as secondary trails across grains. Fluid inclusion petrographic and microthermometric investigations suggest that oil was trapped at temperatures in excess of about 108°C. Although due to deep burial (in excess of 6km) and subsequent exhumation the Kangerlussuaq basin itself cannot be considered as prospective for petroleum, it provides a useful analogue for nearby basins on the North Atlantic margin. Given the fact that no sediments older than Aptian–Albian are present in the basin, a conventional upper Jurassic source rock can be ruled out. Oil may have been generated from an Aptian–Albian estuarine mudstone, whose potential as a regional source rock needs to be assessed. Oil inclusions also occur in injected sandstones that cross-cut the whole sedimentary section and these sandstones may have acted as conduits for petroleum migration. Their presence in offshore North Atlantic basins underneath the Tertiary basalts also needs to be considered in play concepts.