Mineralogy of sediment core CRP-1, supplement to: Ehrmann, Werner (1998): Mineralogy of sediments from CRP-1 as revealed by X-ray diffraction. Terra Antartica, 5(3), 627-632

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...

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Bibliographic Details
Main Author: Ehrmann, Werner
Format: Dataset
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 1998
Subjects:
DEPTH, sediment/rock
Sand
Quartz/standard ratio
Feldspar/standard ratio
Kalifeldspar/standard ratio
Plagioclase/standard ratio
Kalifeldspar/Plagioclase ratio
Quartz/Feldspar ratio
Pyroxene/standard ratio
Amphibole/standard ratio
Zeolite/standard ratio
Opal-CT/standard ratio
Core wireline system
Grain size, sieving/settling tube
X-ray diffraction XRD
CRP-1
Sampling/drilling ice
Cape Roberts Project CRP
Cape Roberts
McMurdo Sound
Ross Sea
Transantarctic Mountains
Antarc*
Antarctica
antartic*
Online Access:https://dx.doi.org/10.1594/pangaea.54628
https://doi.pangaea.de/10.1594/PANGAEA.54628
Description
Summary: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.

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