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Virtasalo, Joonas J; Schröder, Jan F; Luoma, Samrit; Majaniemi, Juha; Mursu, Juha; Scholten, Jan Christoph (2019): Loss on ignition and caesium-137 in sediments from the Hanko submarine groundwater discharge site, northern Baltic Sea, Finland. PANGAEA,, In supplement to: Virtasalo, JJ et al. (2019): Submarine groundwater discharge site in the First Salpausselkä ice-marginal formation, south Finland. Solid Earth, 10, 405-423,

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Sediment samples were collected using a box corer, and cut in 1-cm sub-sample slices. The Cs-137 activity content of sub-samples was measured for 60 min using a BrightSpec bMCA-USB pulse height analyser coupled to a well-type NaI(Tl) detector. The same sub-samples were then analysed for water content and weight loss on ignition (LOI) by weighing sub-samples fresh, weighing after drying at 105 °C for 16 h, and weighing again after ignition at 550 °C for 2 h.
cesium; groundwater; loss on ignition; Oxygen; radon; Salinity; sand; seawater; submarine groundwater discharge; Temperature; turbidity
Median Latitude: 59.893340 * Median Longitude: 23.232350 * South-bound Latitude: 59.891680 * West-bound Longitude: 23.228930 * North-bound Latitude: 59.895000 * East-bound Longitude: 23.235770
Date/Time Start: 2018-05-30T00:00:00 * Date/Time End: 2018-05-31T00:00:00
Minimum DEPTH, sediment/rock: 0.005 m * Maximum DEPTH, sediment/rock: 0.095 m
MGBC-2018-2 (Lappohja pockmark D) * Latitude: 59.895000 * Longitude: 23.235770 * Date/Time: 2018-05-30T00:00:00 * Method/Device: Box corer (BC)
MGBC-2018-3 (Lappohja pockmark E) * Latitude: 59.891680 * Longitude: 23.228930 * Date/Time: 2018-05-31T00:00:00 * Method/Device: Box corer (BC)
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventVirtasalo, Joonas J
2IdentificationIDVirtasalo, Joonas JPockmark
3DEPTH, sediment/rockDepthmVirtasalo, Joonas JGeocode
4Depth, top/minDepth topmVirtasalo, Joonas J
5Depth, bottom/maxDepth botmVirtasalo, Joonas J
6Water content, wet massWater wm%Virtasalo, Joonas JCalculated from weight loss after drying at 105°C
7Loss on ignitionLOI%Virtasalo, Joonas JCalculated from weight loss after ignition at 550 °C
8Caesium-137, activity per mass137CsBq/kgVirtasalo, Joonas JWell-type NaI(Tl) detector, BrightSpec bMCA-USB pulse height analyser
9Caesium-137, standard deviation137Cs std dev±Virtasalo, Joonas JWell-type NaI(Tl) detector, BrightSpec bMCA-USB pulse height analyser
105 data points

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