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Ehrmann, Werner (1998): Mineralogy of sediment core CRP-1. PANGAEA, https://doi.org/10.1594/PANGAEA.54628, Supplement to: Ehrmann, W (1998): Mineralogy of sediments from CRP-1 as revealed by X-ray diffraction. Terra Antartica, 5(3), 627-632, hdl:10013/epic.28349.d001

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Abstract:
The mineralogy of the lower Miocene and Quaternary sediments of the drillcore CRP-1 (McMurdo Sound, Ross Sea, Antarctica) has been analysed using the X-ray diffraction method. Quartz, plagioclase feldspars, K-feldspars are the most important non-clay minerals. Amphiboles occur throughout the core in minor amounts. The composition of the sediments points to an origin in the Transantarctic Mountains for the majority of the detrital components. There, the plutonic and metamorphic rocks of the basement, the sediments of the Beacon Supergroup and the volcanic rocks of the Ferrar Dolerite could serve as possible source lithologies. The quartz abundance is strongly linked to the gain size of the sediments with maxima correlating with coarse gain sizes. The downcore distribution of the other detrital minerals is relatively invariable, and does not indicate a major change in the source area during the time represented by the CRP-1 sediments. Some diagenetic alteration of the sediments is indicated by the occurrence of minor amounts of opal-CT and by some clinoptilolite below110 m depth.
Project(s):
Coverage:
Latitude: -77.007580 * Longitude: 163.755080
Date/Time Start: 1997-10-17T01:30:00 * Date/Time End: 1997-10-24T02:00:00
Minimum DEPTH, sediment/rock: 19.43 m * Maximum DEPTH, sediment/rock: 146.51 m
Event(s):
CRP-1 (16 km ENE Cape Roberts) * Latitude: -77.007580 * Longitude: 163.755080 * Date/Time Start: 1997-10-17T01:30:00 * Date/Time End: 1997-10-24T02:00:00 * Elevation: -153.5 m * Penetration: 132.06 m * Recovery: 113.32 m * Location: off Cape Roberts, Ross Sea, Antarctica * Campaign: CRP-1 * Basis: Sampling/drilling ice * Device: Core wireline system (CWS) * Comment: sea ice thickness: 1.60 m, recovery 86 %. Age and lithology of oldest strata: 22-24 Ma; mudstone with scattered pebbles.
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
1DEPTH, sediment/rockDepthmGeocode
2SandSand%Ehrmann, WernerGrain size, sieving/settling tube
3Quartz/standard ratioQz/stdEhrmann, WernerX-ray diffraction (XRD)
4Feldspar/standard ratioFsp/stdEhrmann, WernerX-ray diffraction (XRD)
5Kalifeldspar/standard ratioKfs/stdEhrmann, WernerX-ray diffraction (XRD)
6Plagioclase/standard ratioPl/stdEhrmann, WernerX-ray diffraction (XRD)
7Kalifeldspar/Plagioclase ratioKfs/PlEhrmann, WernerX-ray diffraction (XRD)
8Quartz/Feldspar ratioQz/FspEhrmann, WernerX-ray diffraction (XRD)
9Pyroxene/standard ratioPyrox/stdEhrmann, WernerX-ray diffraction (XRD)
10Amphibole/standard ratioAmp/stdEhrmann, WernerX-ray diffraction (XRD)
11Zeolite/standard ratioZeo/stdEhrmann, WernerX-ray diffraction (XRD)
12Opal-CT/standard ratioOpal-CT/stdEhrmann, WernerX-ray diffraction (XRD)
Size:
536 data points

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