Butcher Ridge igneous complex, Cook Mountains, Antarctica.

S. Marshak, P. R. Kyle, W. C. McIntosh, V. Samsonov, M. Shellhorn

Research output: Contribution to journalArticlepeer-review


The 10 km-long Butcher Ridge was mapped on a scale of 1:5000; four sections were measured and 400 samples collected. An 40Ar/39Ar age shows the body to be 175 m.y. old. Lithologies are diverse and are described in detail: they include dolerite, massive andesite and rhyolite. The complex may represent mixing in a hypabyssal setting of a silicic magma derived from the melting of crustal rocks and a basaltic magma derived from the mantle. -G.R.M.

Original languageEnglish (US)
Pages (from-to)54-55
Number of pages2
JournalAntarctic Journal of the United States
Issue number5
StatePublished - 1981
Externally publishedYes

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)


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