The geology of the Rockwell 1:25,000 sheet area, Broken Hill, New South Wales

Abstract

This report contains descriptions of the rock units mapped in the Rockwell 1:25,000 sheet area. The rock units include meta sediments, composite gneisses, migmatites, quartzo-feldspathjc gneisses, leucocratic quartzo-feldspathjc rocks, basic and ultrabasic rocks, mineralized rocks, and retrograde schists. Interpretations of metamorphism, stratigraphy, and structure are very briefly outlined. Mineralization is largely stratiform Broken Hill type Pb-Zn-Ag which is spatially associated with quartz-gahnite rock, garnet-quartz rock, and "banded iron formation". Minor Cu mineralization occurs with pyrrhotite in garnet-quartz rocks and/or quartz-magnetjte rocks.