georefid:2013-039349SEDIS Publication Catalogue

ana.macario@awi.de

http://sedis.iodp.org/pub-catalogue/informationpointOfContact2013-07-08T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=2013-0393492011-01-01publicationgeorefid:2013-039349Defoor, WhitneyNew Mexico Institute of Mining and Technology, Department of Earth and Environmental Science, Socorro, NM, United StatesauthorPerson, MarkRice University, United StatesauthorDugan, BrandonWoods Hole Oceanographic Institution, United StatesauthorLizarralde, DanTokyo University of Marine Science and Technology, JapanauthorLarsen, Hans ChristianIowa State University, United StatesauthorCohen, DenisauthorGeological Society of America (GSA), Boulder, CO, United StatespublisherdocumentHardcopyIn: Anonymous, Geological Society of America, 2011 annual meeting43 (5)393Isotopically depleted, relatively fresh pore fluids were reported in continental shelf sediments 40 to 100 km off shore, southeastern Greenland during ODP drilling campaign Leg 152 in 1994. This suggests that significant quantities of glacial meltwater may be sequestered in volcanic and/or sedimentary formations on Greenland's continental shelf. We present a paleohydrologic reconstruction of the late Pleistocene hydrogeology of southeastern Greenland using a finite element model that incorporates fluctuating sea level and ice sheet geometry. We varied permeabilities, delta (super 18) O and salinity boundary conditions as well as ice-sheet extent in order to constrain infiltration rates. Our model shows that the emplacement of isotopically depleted freshwater into offshore aquifers was greatest during the last glacial maximum when the ice sheet extended to near the shelf-slope break. Model results further suggest that significant temporal variations in submarine groundwater discharge occurred during the Pleistocene.completedHydrogeologyArctic regionAtlantic Oceancontinental shelfdischargeglacial geologyGreenlandground waterice sheetsisotope ratiosisotopesLeg 152marine environmentNorth AtlanticO-18/O-16Ocean Drilling Programoxygensalinitystable isotopessubmarine environmenturn:org.iodp:exp:152urnlargerWorkCitationcampaignEnglishgeoscientificInformation-80.000020.00000.000084.0000GreenlandNorth Atlantic