Pressure-Temperature-Time Path of Granulites From the North PCMs - An Integrated Metamorphic Structural Geochronological StudyEntry ID: ASAC_123
Abstract: Metadata record for data from ASAC Project 123
Pressure-Temperature-Time Path of Granulites From the Northern Prince Charles Mountains - An Integrated Metamorphic Structural Geochronological Study See the link below for public details on this project.
From the abstract of one of the referenced papers:
The late Proterozoic basement of the Porthos Range northern ... Prince Charles Mountains, east Antarctica, is dominated by a suite of felsic to mafic granulites derived from igneous and, less importantly, sedimentary protoliths. Compositionally, they are broadly similar to granulites occurring along the Mac. Robertson Land coast and southern Prince Charles Mountains. Ultramafic to mafic orthypyroxene + clinopyroxene granulites with relict igneous layering occur as lenses within the felsic to mafic granulites, and show compositional evidence of a cumulate origin. The felsic to mafic granulites are intruded by sevecral large charnockite bodies that have similarities to the Mawson Charnockite, and may have formed via a two-stage partial melting process. The charnockite and host granulites are chemically very similar, and both may have been derived from a common middle to lower crustal source region. Undepleted K/Rb ratios suggest retention of original chemistry, with variations being due to fractionation processes. Normalised trace element patterns resembling modern-day arc settings suggest that the Porthos Range granulites were possibly generated in a subduction zone environment.
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Start Date: 1988-09-30Stop Date: 1995-03-31
Paleo Temporal Coverage
SOLID EARTH > ROCKS/MINERALS/CRYSTALS > ELEMENTS > MAJOR ELEMENTS
SOLID EARTH > ROCKS/MINERALS/CRYSTALS > ELEMENTS > MINOR ELEMENTS
SOLID EARTH > ROCKS/MINERALS/CRYSTALS > ELEMENTS > TRACE ELEMENTS
SOLID EARTH > ROCKS/MINERALS/CRYSTALS > IGNEOUS ROCKS
SOLID EARTH > ROCKS/MINERALS/CRYSTALS > METAMORPHIC ROCKS
ISO Topic Category
Quality Values provided in temporal and spatial coverage are approximate only.
Twenty-nine whole-rock samples were analysed for their major- and trace-element compositions. Whole-rock and trace-element analyses were determined by X-ray fluorescence techniques using a Siemens SRS-1 spectrometer at Macquarie University following the method of Norrish and Hutton (1969).
For further information see the referenced papers.
Access Constraints A pdf copy of one of the referenced papers is available for download from the provided URL.
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Data Set Progress
Distribution Media: HTTP
Distribution Size: 2.2 MB
Distribution Format: pdf
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 2 9697 4272
Fax: +61 2 9313 8883
Email: B.Hensen at unsw.edu.au
DEPARTMENT OF APPLIED GEOLOGY PO BOX 1 University Of New South Wales
Province or State: New South Wales
Postal Code: 2033
Role: TECHNICAL CONTACT
Phone: +61 3 6226 7541
Email: doug.thost at aad.gov.au
University of Tasmania Antarctic CRC
City: Sandy Bay
Province or State: Tasmania
Postal Code: 7005
Munksgaard N.C., Thost D.E., Hensen B.J. (1992) Geochemistry of Proterozoic granulites from northern Prince Charles Mountains, east Antarctica. Antarctic Science 4(1). 59-69
Harley S.L., Hensen B.J. (1990) Archean and Proterozic high grade terranes of East Antarctica (40 deg E - 60 deg E): a case study of the diversity of granulite facies metamorphism. Ashworth J. High Temperature ... Metamorphism and Crustal Anatexis 320
Hensen B., Harley S. (1990) Graphical analysis of P-T-X relations in granulite facies metapilites. High Temperature Metamorphism and Crustal Anatexis 19
Thost D.E., Hensen B.J. (1992) Gneisses of the Porthos and Athos Ranges, Northern Prince Charles Mountains, east Antarctica: constraints on the prograde and retrograde P-T path. Yoshida Y. Recent Progress in Antarctic Earth Science 93-102
Hensen B.J., Zhou B., Thost D.E. (1993) New age constraints for polycyclic, Proterozoic and Palaeozoic, metamorphic events in granulites from Prydz Bay and Northern Prince Charles Mountains areas, eastern Antarctica. CSIRO Technical Report 131-135
Thost D.E. (1992) The Geologic Histories of Two Areas in East Antarctica: The Bolingen Islands, South-Eastern Prydz Bay and The Porthos Range, Northern Prince Charles Mountains PhD thesis;
Creation and Review Dates
DIF Creation Date: 2000-07-18
Last DIF Revision Date: 2010-07-20