Petrographical classification and mineral assemblage of basement clasts from the Quaternary and Miocene sections of sediment core CRP-1 (Table 1), supplement to: Talarico, Franco M; Sandroni, Sonja (1998): Petrography, mineral chemistry and provenance of basement clasts in the CRP-1 drillcore (Victoria Land Basin, Antarctica). Terra Antartica, 5(3), 601-610

• Main Authors: Talarico, Franco M, Sandroni, Sonja
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1998
• Subjects: DEPTH, sediment/rock; Sample code/label; Clast shape; Clast length a; Clast length b; Clast length c; Lithology/composition/facies; Mineral assemblage; Lithologic unit/sequence; Core wireline system; CRP-1; Sampling/drilling ice; Cape Roberts Project CRP; Cape Roberts; Transantarctic Mountains; Victoria Land; Antarc*; Antarctica; antartic*
• Online Access: https://dx.doi.org/10.1594/pangaea.54982; https://doi.pangaea.de/10.1594/PANGAEA.54982

Petrographical and mineral chemistry data are described for the mist representative basement lithologies occurring as clasts (pebble grain-size class) from the CRP-1 drillhole. Most pebbles consits of either undeformed or foliated biotite with or without hornblende monzogranites. Other rock types include biotite with or without garnet syenogranitr, biotite-hornblende granodiorite, tonalite, monzogranitic porphyries, haplogranite, quartz-monzonite (restricted to the Quaternary section), Ca-silicate rocks and biotite amphibolite (restricted to the Miocene strata). The common and ubiquitous occurence of biotite with or without hornblende monzogranite pebbles, in both the Quaternary and Miocene sections, apparently mirrors the dominance of these rock types in the granitoid assemblages which are presently exposed in the upper Precambrian-lower Paleozoic basement of the south Victoria Land. The other CRP-1 pebble lithologies show petrographical features which consitently support a dominant supply from areas of the Transantarctic Mountains located to the west and south-west of the CRP-1 site, and they thus furthercorroborate a model of local provenance for the supply of basement clasts to the CRP-1 sedimentary strata.