Provenance of Feldspar in Till from the Morozumi Range, Northern Victoria Land
- Edmund Stump
Published Online: 16 MAR 2013
Copyright 1986 by the American Geophysical Union.
Geological Investigations in Northern Victoria Land
How to Cite
Faure, G. (1986) Provenance of Feldspar in Till from the Morozumi Range, Northern Victoria Land, in Geological Investigations in Northern Victoria Land (ed E. Stump), American Geophysical Union, Washington, D. C.. doi: 10.1002/9781118664957.ch17
- Published Online: 16 MAR 2013
- Published Print: 1 JAN 1986
Print ISBN: 9780875901978
Online ISBN: 9781118664957
- Geology—Antarctic regions—Victoria Land
A sample of till, collected several hundred meters above the present surface of the Rennick Glacier along the east side of the Morozumi Range, is poorly sorted and contains clasts presumably derived from the Robertson Bay Group and the Granite Harbour Intrusives. Feldspar concentrates from different sand-size fractions have Rb/Sr ratios that decrease with decreasing grain size from 0.926 (2000–1000 μm) to 0.704 (125–63 μm). The feldspar fractions yield a date of 469.0±24.9 Ma by the Rb-Sr method that is similar to the previously determined age of Granite Harbour Intrusives in the Morozumi Range. This result is consistent with field evidence and clast lithologies, all of which indicate that the till was deposited by ice derived from the Morozumi Range. There is no indication that feldspar of Precambrian age is present in this till.