Stein, Ruediger: Elemental analysis (TC, TOC, IC) and X-Ray diffraction (XRD) data from Core PS72/287-3 (Barrow Strait, Canadian Arctic Archipelago) [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.984005 (dataset in review)
Abstract:
Core PS72/287-3 SL (74°15.95'N, 90°59.09'W; water depth 337 m) was recovered in Barrow Strait in the Canadian Arctic Archipelago during the Polarstern Expedition PS72 in 2008 (Jokat, 2009). The 463 cm long sedimentary section can be divided into two lithological units (Stein et al., 2009). Unit I (0-312 cm) is mainly composed of olive brown (upper 33 cm) and olive gray to (dark) grayish brown, partly bioturbated silty clay to sandy silty clay. Ice-rafted debris (IRD) > 2mm only occur in minor amounts, with minimum values (almost absence) between about 100 and 250 cm and increasing number in the uppermost 70 cm. Unit II (312-463 cm) dominantly consists of grayish brown, light grayish brown, and light gray to gray sandy silty clay and silty clay with common occurrence of dropstones. The occurrence of dropstones ranging in size from 0.5 to 7 cm in diameter, is the main difference to Unit I. Dropstones are especially enriched between 378 and 399 cm, between 412 and 428 cm, and in the lowermost part of the core, classifying the sediment as diamicton. Unit II probably represent the final stage of the last glaciation and/or the deglacial period. An extended ice sheet and its subsequent decay resulted in the formation of diamictons and large input of IRD at the core location. Unit I represents the post-glacial Holocene time interval when seasonally open-marine conditions were predominant (Stein et al., 2009).
In order to reconstruct the detrital sediment provenance, transport processes and ice-sheet history, X-Ray diffraction (XRD) analyses were carried-out using ground bulk sediment (cf., Vogt, 1997; Phillips and Grantz, 2001; Stein et al., 2010). The relative contents of the determined minerals are expressed as ratio of the XRD single mineral peak intensity vs. sum of total analyzed intensities (Vogt, 2009). In addition, total organic carbon (TC), total organic carbon (TOC) and inorganic carbon (IC) calculated as TC - TOC = IC, have been determined from the same set of samples (Master Thesis of Zhelesnov, 2008).
Based on the XRD data, the major proportion of the inorganic carbon is related to dolomite and calcite whereas aragonite and siderite only occur in very, very minor amounts. Thus, for getting a first-order estimate of the detrital carbonate (dolomite), the inorganic carbon was simply divided into its calcite and dolomite proportions using the relative intensity values of the calcite (3.04 Å) and dolomite (2.89 Å) XRD peaks and assuming that calcite plus dolomite equals to the total carbonate content (IC) (for details see Stein et al., 2010). The geology of the surrounding hinterland of Core PS72/287 is dominated by Paleozoic carbonates, siliciclastics and evaporites (Okuma et al., 2023 and further references therein), also reflected in the high dolomite content determined in this core (20 to 45 %).
Keyword(s):
References:
Jokat, Wilfried (2009): The Expedition of the Research Vessel Polarstern to the Arctic in 2008 (ARK-XXIII/3). Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 597, 266 pp, https://doi.org/10.2312/BzPM_0597_2009
Okuma, Emmanuel; Hingst, Johanna; Weiser, Jens; Madaj, Lina; Titschack, Jürgen; Vogt, Christoph; Kienast, Markus; Hillaire-Marcel, Claude; Hebbeln, Dierk; Kasemann, Simone A (2023): Deglacial and Holocene sediment dynamics and provenances off Lancaster Sound: Implications for paleoenvironmental conditions in northern Baffin Bay. Quaternary Science Reviews, 309, 108101, https://doi.org/10.1016/j.quascirev.2023.108101
Phillips, R Lawrence; Grantz, A (2001): Regional variations in provenance and abundance of ice-rafted clasts in Arctic Ocean sediments: implications for the configuration of late Quaternary oceanic and atmospheric circulation in the Arctic. Marine Geology, 172(1-2), 91-115, https://doi.org/10.1016/S0025-3227(00)00101-8
Stein, Ruediger; Krylov, S; Matthiessen, Jens; Nam, Seung-Il; Niessen, Frank; ARK-XXIII/3 Geoscientific Party (2009): Main lithologies and lithostratigraphy of ARK-XXIII/3 sediment cores. In: Jokat, W (ed.), The Expedition of the Research Vessel "Polarstern" to the Arctic in 2008, Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 597, 61-73
Stein, Ruediger; Matthiessen, Jens; Niessen, Frank (2010): Re-coring at Ice Island T3 site of key core FL-224 (Nautilus Basin, Amerasian Arctic): sediment characteristics and stratigraphic framework. Polarforschung, 79(2), 81-96, https://epic.awi.de/id/eprint/22436/1/Ste2010c.pdf
Vogt, Christoph (1997): Zeitliche und räumliche Verteilung von Mineralvergesellschaftungen in spätquartären Sedimenten des Arktische Ozeans und ihre Nützlichkeit als Klimaindikatoren während der Glazial/Interglazial-Wechsel (Regional and temporal variations of mineral assemblages in Arctic Ocean sediments as climate indicator during glacial/interglacial changes). Berichte zur Polarforschung = Reports on Polar Research, 251, 309 pp, https://doi.org/10.2312/BzP_0251_1997
Vogt, Christoph (2009): Data report: semiquantitative determination of detrital input to ACEX sites based on bulk sample X-ray diffraction data. In: Backman, J., Moran, K., McInroy, D.B., Mayer, L.A., and the Expedition 302 Scientists, Proc. IODP: Edinburgh (Integrated Ocean Drilling Program Management International, Inc.), 302, https://doi.org/10.2204/iodp.proc.302.203.2009
Coverage:
Latitude: 74.266000 * Longitude: -90.985200
Date/Time Start: 2008-08-21T14:16:00 * Date/Time End: 2008-08-21T14:16:00
Minimum DEPTH, sediment/rock: 0.00 m * Maximum DEPTH, sediment/rock: 4.60 m
Event(s):
PS72/287-3 * Latitude: 74.266000 * Longitude: -90.985200 * Date/Time: 2008-08-21T14:16:00 * Elevation: -337.0 m * Penetration: 5 m * Recovery: 4.63 m * Location: Northwestern Passages * Campaign: ARK-XXIII/3 (PS72) * Basis: Polarstern * Method/Device: Gravity corer (GC) * Comment: 5 core sections: 0-0.7, 0.7-1.71, 1.71-2.72, 2.72-3.73, 3.73-4.63 m
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Stein, Ruediger | Geocode | |
| 2 | Peak area, total | Peak area tot | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | Sum of peak areas of total determined minerals, graphically determined peak areas calculated with MacDiff 4.2.5 software | |
| 3 | Smectite (17-14.5 Å), relative abundance | Sme 17-14.5 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 4 | Illite 10Å, relative abundance | Ill10Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 5 | Illite 5Å, relative abundance | Ill 5Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 6 | Kaolinite (3.58 Å), relative abundance | Kln 3.58 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 7 | Chlorite (3.54 Å), relative abundance | Chl 3.54 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 8 | Smectite/Illite 5Å ratio | Sme/Ill 5Å | Stein, Ruediger | Calculated | ||
| 9 | Kaolinite/Chlorite ratio | Kln/Chl | Stein, Ruediger | Calculated | ||
| 10 | Quartz (4.26 Å), relative abundance | Qz A 4.26 | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 11 | Plagioclase (3.15-3.22 Å), relative abundance | Pl 3.15-3.22 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 12 | Kalifeldspar (3.24-3.26 Å), relative abundance | Kfs 3.24-3.26 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 13 | Quartz/Feldspar ratio | Qz/Fsp | Stein, Ruediger | Calculated | ||
| 14 | Kalifeldspar/Plagioclase ratio | Kfs/Pl | Stein, Ruediger | Calculated | ||
| 15 | Pyrite (2.71 Å), relative abundance | Py 2.71 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 16 | Amphibole (8.1-8.6 Å), relative abundance | Amp 8.1-8.6 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 17 | Pyroxene (2.99-2.92 Å), relative abundance | Pyrox 2.99-2.92 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 18 | Pyroxene/Amphibole ratio | Pyrox/Amph | Stein, Ruediger | Calculated | ||
| 19 | Calcite (3.03 Å), relative abundance | Cal 3.03 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 20 | Dolomite (2.88 Å), relative abundance | Dol 2.88 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 21 | Aragonite (3.4 Å), relative abundance | Arg 3.4 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 22 | Siderite (2.79 Å), relative abundance | Sd 2.79 Å | Stein, Ruediger | X-ray diffraction, bulk sample, peak intensity | ||
| 23 | Calcite/Dolomite ratio | Cal/dol | Stein, Ruediger | Calculated | ||
| 24 | Dolomite/Calcite ratio | Dol/Cal | Stein, Ruediger | Calculated | ||
| 25 | Calcite/(Calcite+Dolomite) ratio | Cal/(Cal+Dol) | Stein, Ruediger | Calculated | ||
| 26 | Dolomite/(Calcite+Dolomite) ratio | Dol/(Cal+Dol) | Stein, Ruediger | Calculated | ||
| 27 | Carbon, total | TC | % | Stein, Ruediger | Element analyser, CHN | |
| 28 | Carbon, organic, total | TOC | % | Stein, Ruediger | Element analyser, LECO, CS-125 | |
| 29 | Carbon, inorganic, total | TIC | % | Stein, Ruediger | Calculated | Calculated as TC - TOC = IC |
| 30 | Calcite | Cal | % | Stein, Ruediger | Calculated | Calculated as Cal (%) = (Cal / (Cal + Dol)) * IC * 8.333; see Stein et al., 2010 |
| 31 | Dolomite | Dol | % | Stein, Ruediger | Calculated | Calculated as Dol (%) = (Dol / (Cal + Dol)) * IC * 7.67; see Stein et al., 2010 |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
2121 data points
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