Giant iceberg plow marks at more than 1 km water depth offshore West Greenland
Marine Geology, Nov 1, 2007
... Fricker et al., 2002 HA Fricker, NW Young, I. Allison and R. Coleman, Iceberg calving from th... more ... Fricker et al., 2002 HA Fricker, NW Young, I. Allison and R. Coleman, Iceberg calving from the Amery Ice shelf, East Antarctica, Ann ... Kristoffersen et al., 2004 Y. Kristoffersen, B. Coakley, W. Jokat, M. Edwards, H. Brekke and J. Gjengedal, Seabed erosion on the Lomonosov Ridge ...
Petroleum geological studies were initiated in eastern North Greenland in 1993 as part of a regio... more Petroleum geological studies were initiated in eastern North Greenland in 1993 as part of a regional mapping programme carried out by the Geological Survey of Greenland (Henriksen, 1994, 1995; Stemmerik & Elve bakk, 1994). These activities continued in 1994, and a three-year research programme was initiated to generate data for basin modelling of the Phanerozoic sedimentary basins in the easternmost part of North Greenland. The basin modelling project is supported by the Danish Ministry of Environment and Energy and is a continuation of previ ous petroleum-related research programmes in the region (Christiansen, 1989; Hakansson & Stemmerik, this report). The aim of the project is to improve the understanding of the subsidence and uplift history of the adjacent shelf ba sins, and to evaluate the presence of pre-Carboniferous source rocks with adequate maturity in these areas. The petroleum related studies mainly comprised detailed sedimentological and biostratigraphic investigations of the Carboniferous and Permian sediments of Holm Land and Amdrup Land during the 1994 field season (Fig. 1). In addition, samples for thermal maturity analyses and bio stratigraphy were collected from the Lower Palaeozoic sediments of southern Peary Land and northern Valdemar Gliickstadt Land, the Mesozoic of Kap Rigsdagen and the Tertiary of Prinsesse Thyra 0 (Fig. 1).
Danish development of a full-scale CCS demonstration plant in a saline aquifer
First Break, 2009
... in mineral-ogy, sorting, and facies assemblages (Nielsen, 2003). On Danish development of a f... more ... in mineral-ogy, sorting, and facies assemblages (Nielsen, 2003). On Danish development of a full-scale CCS demonstration plant in a saline aquifer Ann Troelsgaard Sørensen,1* Lone Klinkby,2 Niels Peter Christensen,1 Finn Dalhoff,1 Ole Biede1 and Marius Noer3 outline ...
A three-year research programme in Jameson Land was initiated in 1993 as part of ongoing studies ... more A three-year research programme in Jameson Land was initiated in 1993 as part of ongoing studies of the post Caledonian sedimentary basins in East Greenland. The project is supported by the Danish Ministry of Energy and is carried out as a collaboration between the Geological Survey of Greenland (GGU) and Geological Institute, University of Copenhagen. The purpose of the project is to examine the relationships between fluctuations in relative sea-Ievel and the distribution of source- and reservoir rocks in the Upper Permian and Jurassic sedimentary succession in Jameson Land. The aim is to provide a framework for prediction of the hydrocarbon potential offshore East Greenland.
The Lower Carboniferous non-marine Sortebakker Formation is restricted to the south coast of Holm... more The Lower Carboniferous non-marine Sortebakker Formation is restricted to the south coast of Holm Land. It is estimated to exceed 1000 m in thickness and is subdivided by a low-angle disconformity into a lower mudstone-dominated unit (c. 335 m) and an upper sand-dominated unit (c. 665 m). The lower mudstone-dominated succession consists of stacked 0.5–6 m thick fining-upward cycles of fine- to medium-grained sandstone and mudstone. Cycles in the upper part of the formation are up to 20 m thick. They are dominated by thick tabular sandstones up to 13 m thick overlain by shaly units that resemble those in the lower mudstone dominated cycles. Six facies associations are identified and together describe a fluviatile–lacustrine deposi-tional system. Five of the facies associations characterise different parts of a meandering river-dominated flood plain whereas the sixth facies association represents more permanent lakes.
EU Member States are in the process of transposing European regulatory requirements that define t... more EU Member States are in the process of transposing European regulatory requirements that define the high-level conditions of a storage permit into their national laws. This regulatory framework defines a range of performance standards which recognise specific high-level uncertainties and long-term issues which storage developers will have to address. However, with one or two notable exceptions, the level of site characterisation required to obtain a storage permit has not been systematically evaluated. To determine the required geological site characterisation necessary to demonstrate adequate understanding of site performance, two storage case studies identify those issues that might remain challenging in the permitting process. These case studies, an onshore aquifer and an offshore multi-store site, produce credible dry-run storage permit applications from site geological characterisation activities, which are evaluated by a separate team, acting as a regulator. The applications, though necessarily reduced in scope from those anticipated for full storage projects, comprise the key elements of a permit. Issues identified during this process include: Defining the storage complex boundaries, which for certain sites may be challenging, especially where expected pressure responses may extend for some distance or where lateral boundaries may not be clearly defined. We present examples of how these regulatory boundaries have been defined for the two case studies. Key Performance Indicators (KPIs) include a range of metrics against which site performance can be measured, both during the operational and closure phases, providing a basis for the design of the geological monitoring program and the corrective measures plan.-specific KPIs in the case studies described. Whilst it might be relatively straightforward to define qualitative indicators, we conclude that KPIs will need to be defined quantitatively for them to be the most effective.
NOTE: This article was published in a former series of GEUS Bulletin. Please use the original ser... more NOTE: This article was published in a former series of GEUS Bulletin. Please use the original series name when citing this article, for example: Larsen, M., Piasecki, S., Preuss, T., Seidler, L., Stemmerik, L., Therkelsen, J., & Vosgerau, H. (1998). Petroleum geological activities in East Greenland in 1997. Geology of Greenland Survey Bulletin, 180, 35-42. https://doi.org/10.34194/ggub.v180.5084 _______________ In 1997, petroleum geological activities were continued in East Greenland in order to increase existing knowledge on the sedimentology and biostratigraphy of the Upper Permian – Mesozoic succession, and to better define and describe the petroleum systems of the basin. The activities form part of the multidisciplinary research project ‘Resources of the sedimentary basins of North and East Greenland’ initiated in 1995 with financial support from the Danish Research Councils, and were mostly continuations of pre- and post-doctoral research (Stemmerik et al. 1996, 1997). Some new...
Carboniferous strata of the Wandel Sea Basin unconformably overlie the Laurentian Precambrian cry... more Carboniferous strata of the Wandel Sea Basin unconformably overlie the Laurentian Precambrian crystalline rocks of the Caledonian hinterland at its northernmost exposures in Holm Land (~80°N). Complex zircon from an intermediate gneiss gives an upper-intercept age of 1878 ± 71 Ma, a protolith age which fits with the regional 1.8-2.0 Ga calc-alkaline arc. A strongly deformed pegmatite was intruded at 435 ± 17 Ma, and it is a rare example of Caledonian magmatism in the northern sector of the orogen. Omphacite confirms the presence of eclogite (sensu stricto) lenses in the basement complex, thus documenting the northern extent of the NorthEast Greenland eclogite province formed during the Caledonian collision with Baltica. Holm Land lies in the eastern block of the eclogite province, where an ultrahigh-pressure (UHP) meta morphic event took place at 365-350 Ma. Zircon from a Holm Land eclogite lacks a Eu anomaly, has a flat heavy rare earth element pattern, and gives a sensitive high-resolution ion microprobe U-Pb age of 423 ± 7 Ma, and it is thus interpreted as the time of high-pressure (HP) metamorphism. This age overlaps with the established age of widespread HP metamorphism for the eclogite province (i.e., 415-395 Ma), rather than the younger UHP metamorphism. Westward thrusting of the NorthEast Greenland eclogite province onto the Laurentian margin after 395 Ma and subsequent exhumation of this uppermost thrust sheet provided a substrate for Carboniferous deposition. Detrital zircon age spectra from arkosic sandstones of the late Viséan (ca. 330-340 Ma) Sortebakker and early Moscovian (ca. 310-315 Ma) Kap Jungersen Formations record the progressive unroofing of the NorthEast Greenland Caledonides. All seven samples have a major peak at 1.8-2.0 Ga, and five also have a 1.75 Ga peak, matching the Paleoproterozoic arc and later anorogenic granitoids that comprise the crystalline basement. Paleozoic grains are sparse in the Sortebakker sandstones, but they constitute a pronounced 400 Ma peak in the younger Kap Jungersen Formation. The composition of the detritusincluding garnet clasts, the high amount of discordant zircon (40%), and the large numbers of grains with metamorphic rims that cluster around 410 Ma-reflects a local provenance sourced in the NorthEast Greenland eclogite province, with some input from the overlying thrust sheets. Other Devonian and Carboniferous basins within and peripheral to the Caledonides also show distinct signatures, demonstrating that there is not a simple, representative detrital zircon signature for the Caledonian orogen.
Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles, 2015
Risk Assessment-Led Characterisation of the SiteChar UK North Sea Site for the Geological Storage... more Risk Assessment-Led Characterisation of the SiteChar UK North Sea Site for the Geological Storage of CO 2 Caractérisation d'un site de stockage géologique de CO 2 situé en Mer du Nord (Royaume-Uni) sur la base d'une analyse de risques
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