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  • 1
    facet.materialart.
    Unknown
    Sand fraction, organic carbon and nitrogen data, and calculated marine and terrestrial organic carbon fractions of surface sediments in the western Barents Sea
    PANGAEA
    In:  Supplement to: Pathirana, Irene; Knies, Jochen; Felix, Maarten; Mann, Ute (2014): Towards an improved organic carbon budget for the western Barents Sea shelf. Climate of the Past, 10(2), 569-587, https://doi.org/10.5194/cp-10-569-2014
    Details
    Publication Date: 2023-06-27
    Description: There is generally a lack of knowledge on how marine organic carbon accumulation is linked to vertical export and primary productivity patterns. In this study, a multi-proxy geochemical and organic-sedimentological approach is coupled with organic facies modelling focusing on regional calculations of carbon cycling and carbon burial on the western Barents Shelf between northern Scandinavia and Svalbard. OF-Mod 3D, an organic facies modelling software tool, is used to reconstruct the marine and terrestrial organic carbon fractions and to make inferences about marine primary productivity in this region. The model is calibrated with an extensive sample dataset and reproduces the present-day regional distribution of the organic carbon fractions well. Based on this new organic facies model, we present regional carbon mass accumulation rate calculations for the western Barents Sea. The calibration dataset includes location and water depth, sand fraction, organic carbon and nitrogen data and calculated marine and terrestrial organic carbon fractions.
    Keywords: ARK-XIII/2; Barents Sea; Calculated; Carbon, organic, marine matter; Carbon, organic, terrestrial matter; Carbon, organic, total; DEPTH, sediment/rock; East Greenland continental slope; Element analyser CHN, LECO CS 244; Element analyser isotope ratio mass spectrometer (EA-IRMS); Elevation of event; Event label; Giant box corer; GKG; HM_St01; HM_St02; HM_St03; HM_St04; HM_St06; HM_St07; HM_St09; HM_St11; HM_St12; HM_St1239; HM_St1240; HM_St1241; HM_St1242; HM_St1243; HM_St1244; HM_St1245; HM_St1246; HM_St1249; HM_St1250; HM_St1251; HM_St1254; HM_St1255; HM_St1258; HM_St1260; HM_St1261; HM_St1262; HM_St1263; HM_St1264; HM_St1265; HM_St1266; HM_St1267; HM_St1268; HM_St1269; HM_St1270; HM_St1272; HM_St1273; HM_St1274; HM_St1275; HM_St1276; HM_St1277; HM_St1278; HM_St1279; HM_St1280; HM_St1281; HM_St1282; HM_St1283; HM_St1285; HM_St1286; HM_St1287; HM_St1288; HM_St1289; HM_St1290; HM_St1292; HM_St13; HM_St14; HM_St15; HM_St16; HM_St17; HM_St18; HM_St19; HM_St20; HM_St21; HM_St22; HM_St23; HM_St24; HM_St25; HM_St26; HM_St27; HM_St28; HM_St29; HM_St30; HM_St31; HM_St32; HM_St33; HM_St34; HM_St35; HM_St36; HM_St37; HM_St38; HM_St39; HM_St40; HM_St41; HM_St42; HM_St43; HM_St44; HM_St45; HM_St625; HM_St627; HM_St629; HM_St631; HM_St633; HM_St635; HM_St639; HM_St643; HM_St645; HM_St647; HM_St649; HM_St651; HM_St653; HM_St655; HM_St657; HM_St659; HM_St661; HM_St663; HM_St665; HM_St667; HM_St669; HM_St671; HM_St673; HM_St675; HM_St677; HM_St679; HM_St681; HM_St690; HM_St692; JM10; Latitude of event; Longitude of event; MUC; MultiCorer; Nitrogen, inorganic; Nitrogen, organic; Nitrogen, total; North Greenland Sea; Norwegian Sea; Organic matter, marin; Polarstern; PS2824-6; PS2827-5; PS2831-9; PS2832-13; PS2834-7; PS2835-1; PS2837-8; PS2839-7; PS2847-4; PS2853-11; PS2855-9; PS2856-9; PS2857-12; PS2860-8; PS2862-7; PS2865-2; PS44; PS44/047; PS44/052; PS44/058; PS44/059; PS44/062; PS44/063; PS44/065; PS44/068; PS44/076; PS44/084; PS44/087; PS44/088; PS44/089; PS44/092; PS44/094; PS44/097; R100MC010; R104MC011; R10MC96; R111MC004; R112MC007; R117MC005; R11MC105; R156MC057; R161MC009; R178MC010; R17MC102; R184BX065; R18MC98; R1MC85; R209MC003; R223MC005; R223MC006; R229MC007; R232MC009; R248MC010; R259MC011; R276BX049; R280AMC016; R280BMC018; R291MC022; R297BX05; R311BX059; R35MC114; R35MC118; R367MC026; R379BX079; R37MC115; R384MC028; R391MC029; R397MC030; R3MC110; R405MC031; R406MC032; R416BX088; R421MC033; R422BX090; R423MC034; R431MC035; R49MC128; R4MC107; R5MC112; R68AMC136; R68MC149; R68MC154; R77MC001; R7MC89; R80MC004; R81MC002; R86MC005; R87MC006; R8MC88; R96MC008; Reference/source; Size fraction 〉 0.063 mm, sand; W Spitzbergen; Yermak Plateau; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 1459 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Unknown
    Bulk analysis of sediment core JM99-1200
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Andfjorden; Beckman Coulter Laser diffraction particle size analyzer LS 2000; Calcium carbonate; Calculated, CaCO3=(TC-TOC)*8.333; Carbon, organic, total; DEPTH, sediment/rock; Element analyser CHN, LECO CS 244; Element analyser isotope ratio mass spectrometer (EA-IRMS); Jan Mayen; JM99/11; JM99-1200; Opal, auto analysis (Müller & Schneider, 1993); Opal, biogenic silica; PC; Piston corer; Size fraction 〉 0.063 mm, sand; SPINOF; δ13C, organic carbon
    Type: Dataset
    Format: text/tab-separated-values, 701 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Unknown
    (Table 1) Age determination of sediment core JM99-1200
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age, 14C AMS; Age, 14C milieu/reservoir corrected (-400 yr); Age, dated; Age, dated material; Age, dated standard deviation; Andfjorden; Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; DEPTH, sediment/rock; Jan Mayen; JM99/11; JM99-1200; Laboratory; PC; Piston corer; Sedimentation rate; SPINOF
    Type: Dataset
    Format: text/tab-separated-values, 56 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
    facet.materialart.
    Unknown
    Biogenic sedimentation on the northern Norwegian continental shelf
    PANGAEA
    In:  Supplement to: Knies, Jochen; Hald, Morten; Ebbesen, Hanne; Mann, Ute; Vogt, Christoph (2003): A deglacial-middle Holocene record of biogenic sedimentation and paleoproductivity changes from the northern Norwegian continental shelf. Paleoceanography, 18(4), 1096, https://doi.org/10.1029/2002PA000872
    Details
    Publication Date: 2023-06-27
    Description: The relative proportions of marine organic carbon and biogenic carbonate in a high-resolution record from a glacial trough on the northern Norwegian continental shelf were used to decipher changes in biogenic sedimentation and paleoproductivity from the last deglaciation to the middle Holocene. Decadal-scale to century-scale oscillations in biogenic sedimentation and surface ocean productivity recorded in the Andfjorden sediments are synchronous with abrupt climate changes in open oceanic and atmospheric regimes of the high northern latitudes. Following several fluctuations during the Bølling-Allerød interstadial, the most dramatic drop in marine organic carbon and biogenic carbonate proportions occurred during the Younger Dryas. However, many short-term and low-amplitude events during the Preboreal and the Holocene have also affected biogenic sedimentation in the outer Andfjorden. Apparently, these abrupt changes in biogenic sedimentation were caused by the suppression of a potential upwelling center in the outer Andfjorden by variable Atlantic Water inflow over the past 14,000 years. The adjustment of decadal high-productivity coastal systems to freshwater-forced multiple cooling events during the late glacial to middle Holocene highlights the impact of global climate changes on the climate-sensitive local ecosystems off coastal Norway.
    Keywords: Andfjorden; Jan Mayen; JM99/11; JM99-1200; PC; Piston corer; SPINOF
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Unknown
    Organic carbon chemistry of ODP Hole 151-909C (Table 1) (2002)
    PANGAEA
    In:  Supplement to: Knies, Jochen; Mann, Ute (2002): Depositional environment and source rock potential of Miocene strata from the central Fram Strait: introduction of a new computing tool for simulating organic facies variations. Marine and Petroleum Geology, 19(7), 811-828, https://doi.org/10.1016/S0264-8172(02)00090-9
    Details
    Publication Date: 2024-01-09
    Description: Organic-rich sediments were recognized in early Miocene strata from the Norwegian-Greenland Sea during ODP Leg 151. Three organic-geochemical subunits were distinguished in Hole 909C using detailed organic-geochemical and microscopic analyses. TOC (up to 3 wt%), HI (up to 200 mg HC/g TOC), and d13Corg values (~24–26 per mil) indicate the predominance of terrestrial type III organic matter in Subunit 3 (~18–16.2 Ma). Biomarker and vitrinite reflectance values (R0 ~0.5%) point to rather fresh immature terrestrial organic matter supplied by river discharge from adjacent vegetated coastal areas. Although the sediments of Subunit 3 have a fair (to good) source rock potential they are insufficiently mature to generate significant amounts of oil or gas. To test if the moderate generation potential and source rock quality of Subunit 3 are applicable to the entire area, the computer software OF-Mod was applied. Several modelling runs testing the most probable depositional scenarios result, even under conservative assumptions, in the formation of good to excellent source rocks towards the basin margins.
    Keywords: 151-909C; Accumulation rate, marine organic matter; Accumulation rate, terrestrial organic matter; AGE; Alginite; Calculated; Carbon, organic, marine matter; Carbon, organic, terrestrial matter; Carbon, organic, total; Density, dry bulk; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Hydrogen index, mass HC, per unit mass total organic carbon; Joides Resolution; Leg151; Liptodetrinite; North Greenland Sea; Ocean Drilling Program; ODP; Paleoproductivity as carbon; Rock eval pyrolysis (Behar et al., 2001); Sample code/label; Sedimentation rate; Vitrinite
    Type: Dataset
    Format: text/tab-separated-values, 156 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
    facet.materialart.
    Unknown
    Physical and chemical constraints on core-mantle differentiation in terrestrial planets (2010)
    Univ. Bayreuth
    Details
    Publication Date: 2021-03-29
    Description: In this study a physical mechanism and geochemical parameters have been examined in high pressure and high temperature experiments in order to place constraints on the conditions and the manner by which core-mantle differentiation occurred on Earth and terrestrial planets. The wetting characteristics of liquid Fe-Si alloys in a matrix of the respective predominating stable silicate mantle mineral (forsterite or silicate perovskite) at pressures of 2 - 5 and 25 GPa and temperatures of 1600 - 2000 ʿC were studied by determining the liquid metal-solid silicate contact angles. The median angle values from texturally-equilibrated samples were found to be independent of pressure, temperature, silicate mineralogy and the Si content in the metal fraction and range between 130ʿ and 140ʿ which is far above the critical wetting boundary of 60ʿ. This shows that within the studied range of conditions dissolved Si does not lower the surface energies between Fe-rich liquids and silicate mantle grains. As a consequence, under reducing conditions the presence of Si in the metal phase of planetary bodies would not have induced or aided percolative flow as the metal-silicate separation process...
    Description: thesis
    Keywords: 550 ; TOD 300 ; TGE 520 ; VJK 000 ; Erdinneres insgesamt {Geophysik} ; Planeteninneres {Astronomie} ; Experimentelle Geochemie
    Language: English
    Type: monograph , publishedVersion
    Format: 149 S.
    Format: application/pdf
    Location Call Number Limitation Availability
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    CITATION GEO-LEO
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