I: Isotopic systematics in Archean rocks, West Greenland. II: Mineralogic and petrologic investigations of lunar rock samples

• Main Author: Gancarz, Alexander John
• Format: Thesis
• Language: English
• Published: California Institute of Technology 1976
• Subjects: Geology; FOS Earth and related environmental sciences; Geological and Planetary Sciences; Greenland; Ivnajaugtoq
• Online Access: https://dx.doi.org/10.7907/s5c5-9e60; https://resolver.caltech.edu/CaltechETD:etd-07062006-115658

Pb isotopic abundances and U-Th-Pb concentrations are reported for feldspar megacrysts from the 3.59 AE old Amitsoq Gneiss, Godthaab District, West Greenland. The distinctive Pb in the feldspars is the most primitive terrestrial Pb so far observed. It is observed in feldspars which are from differen...