Phyllite and schist samples from Cape Bowles, Clarence Island, have a greenschist-facies mineralogy. Mineralogy and total rock chemistry suggest a premetamorphic lithology of arenaceous sediments derived from an acid igneous terrain. Rb/Sr isotopic data show that metamorphism occurred during the same late Cretaceous (70-100 m.y.) event recorded elsewhere in the Scotia metamorphic complex and initial 86Sr/87Sr ratios are consistent with a Mesozoic rather than Precambrian source area. (Authors' abstract) -C.N.
|Number of pages||11|
|Journal||Instituto Antartico Chileno, Serie Cientifica|
|Publication status||Published - 1983|
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Environmental Science(all)