Geological belonging of Cape Hinode metamorphics, Lutzow-Holm Complex, East Antarctica

Abstract

Metatrondhemite from Cape Hinode, Lutzow-Holm Complex, East Antarctica, has yielded 1017 Ma SHRIMP zircon U-Pb dating. Additional EMP monazite datings on metapelitic rocks yielded 935~1007 Ma which are consistent with the SHRIMP result. It is worth noting that no 500 Ma were detected by both methods. Petrographical investigations suggest that metamorphic rocks from Cape Hinode belong to granulite-facies conditions. These lines of evidence imply that Cape Hinode is exotic within the Lutzow-Holm Complex with respect to geochronology and metamorphic grade, and possibly correlatable with the neighboring Rayner Complex.