Major magmatic events in Mt Meredith, Prince Charles Mountains: First evidence for early Palaeozoic syntectonic granites
Open-File Report
2007-1047-SRP-100
By: N.A. Gongurov, A.A. Laiba, and B.V. Beliatsky
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Abstract
Precambrian rocks at Mt Meredith underwent granulite-facies metamorphism M1. Zircon isotope dating for
two orthogneisses revealed the following age signatures: 1294±3 and 957±4Ma; 1105±5 and 887±2Ma. The oldest ages
could reflect the time of orthogneiss protolith crystallization and the latest age determinations date Grenvillian
metamorphism. The metamorphic rocks were intruded by two-mica and garnet-biotite granites. The granites and host
rocks underwent amphibolite-facies metamorphism M2. Zircon isotope analysis of the two-mica granites showed age
estimation within 550-510Ma and zircon dating of the garnet-biotite granites revealed the ages of 1107±5, 953±8, and
551±4Ma. As Pan-African age signatures were obtained from only the granite samples, it is possible to suggest that the
granites were formed at the time of 510-550Ma and the zircons with greater age values were captured by granites from
the host rocks.
Suggested Citation
Gongurov, N., Laiba, A., and Beliatsky, B., 2007, Major magmatic events in Mt Meredith, Prince Charles Mountains: First evidence for early Palaeozoic syntectonic granites: U.S. Geological Survey Open-File Report 2007-1047-SRP-100, 4 p., https://doi.org/10.3133/ofr20071047SRP100.
ISSN: 2331-1258 (online)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Major magmatic events in Mt Meredith, Prince Charles Mountains: First evidence for early Palaeozoic syntectonic granites |
| Series title | Open-File Report |
| Series number | 2007-1047-SRP-100 |
| DOI | 10.3133/ofr20071047SRP100 |
| Year Published | 2007 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 4 p. |
| Larger Work Type | Report |
| Larger Work Subtype | USGS Numbered Series |
| Larger Work Title | Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007 |
| Other Geospatial | Antarctica |
| Additional Online Files (Y/N) | N |