XRD mineralogy of sediments from the Greenland east coast ...

• Main Authors: Andrews, John T, Jennings, Anne E, Coleman, George C, Eberl, Dennis D
• Format: Dataset
• Language: English
• Published: PANGAEA 2011
• Subjects: Event label; Longitude of event; Latitude of event; Elevation of event; DEPTH, sediment/rock; Quartz; Microcline; Orthoclase; Anorthoclase; Albite; Oligoclase; Labradorite; Bytownite; Anorthite; Calcite; Dolomite; Iron-Dolomite; Siderite; Halite; Ferrotschermakite; Diopside; Pyrite, FeS2; Magnetite; Hematite, Fe2O3; Maghemite; Diatoms; Chert; Non-clay minerals; Kaolinite; Saponite; Smectite; Illite; Biotite; Iron-Chlorite; Muscovite; Clay minerals; Total; Giant box corer; X-ray diffraction XRD; ARK-VII/1; ARK-X/2; Polarstern; East Greenland; Greenland; Kangerlussuaq; Scoresby Sund
• Online Access: https://dx.doi.org/10.1594/pangaea.758534; https://doi.pangaea.de/10.1594/PANGAEA.758534

Quantitative X-Ray Diffraction (qXRD) analysis of the <2 mm sediment fraction from surface (sea floor) samples, and marine sediment cores that span the last 10-12 cal ka BP, are used to describe spatial and temporal variations in non-clay mineral compositions for an area between Kangerlussuaq Trough and Scoresby Sund (?67°-70°N), East Greenland. Bedrock consists primarily of an early Tertiary alkaline complex with high weight% of pyroxene and plagioclase. Farther inland and to the north, the bedrock is dominantly felsic with a high fraction of quartz and potassium feldspars. Principal Component (PC) analysis of the non-clay sediment compositions indicates the importance of quartz and pyroxene as compositional end members, with an abrupt shift from quartz and k-feldspar dominated sediments north of Scoresby Sund to sediments rich in pyroxene and plagioclase feldspars offshore from the early Tertiary basaltic outcrop. Coarse (<2 mm or <1 mm) ice-rafted sediments are largely absent from the trough ...