Geochemistry of basement clasts from sediment core CRP-3 in the ross Sea, Antarctica, supplement to: Sandroni, Sonja; Talarico, Franco M (2001): Petrography and provenance of basement clasts and clast variability in CRP-3 drillcore (Victoria Land Basin, Antarctica). http://www.mna.unisi.it/english/Publications/TAP/TA_pdfs/Volume_08/CRP3_Science_Results/TA_08_449_Sandroni.pdf, Terra Antartica, 8(4), 449-468

Distribution patterns and petrographical and mineral chemistry data are described for the most representative basement lithologies occuring as clast in the c. 824 m thick Tertiary sedimentary sequence at the CRP-3 drillsite. These are granule to bolder grain size clasts of igneous and metamorphic ro...

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Bibliographic Details
Main Authors: Sandroni, Sonja, Talarico, Franco M
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2001
Subjects:
Core wireline system
CRP-3
Sampling/drilling from ice
Cape Roberts Project CRP
Ross Sea
Victoria Land
Cape Roberts
Granite Harbour
Antarc*
Antarctica
antartic*
Online Access:https://dx.doi.org/10.1594/pangaea.510769
https://doi.pangaea.de/10.1594/PANGAEA.510769
Description
Summary:Distribution patterns and petrographical and mineral chemistry data are described for the most representative basement lithologies occuring as clast in the c. 824 m thick Tertiary sedimentary sequence at the CRP-3 drillsite. These are granule to bolder grain size clasts of igneous and metamorphic rocks. Within the basement clast assemblage, granitoid pebbles are the predominant lithology. They consist of dominant grey biotic-bearing monzogranite, pink biotite-hornblende monzogranite, and biotite-bearing leucomomonzgranite. Minor lithologies include: actinolite-bearing leucotonalite, microgranite, biotite-hornblende quartz-monzonitic porphyr, and foliated biotic leucomonzogranite. Metamorphic clasts include rocks of both granitic and sedimentary derivation. They include mylonitic biotic orthogneiss, with or without garnet, muscovite-bearing quartzite, sillimanite-biotite paragneiss, biotite meta-sandstone, biotite-spotted schist, biotite-clacite-clinoamphibole meta-feldspathic arenite, biotite-calcite-clinozoisite meta-siltstone, biotite±clinoamphibole meta-marl, and graphite-bearing marble. As in previous CRP drillcores, the ubiquitous occurence of biotite±hornblende monzogranite pebbles is indicative of a local provenance, closely mirroring the dominance of these lithologies in the on-shore basement, where the Cambro-Ordovician Granite Harbour Intrusive Complex forms the most extensively exposed rock unit.

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