Data

Geological map of high-grade gneisses in the northern Vestfold Hills

Australian Antarctic Data Centre
SNAPE, IAN ; GEOSCIENCE AUSTRALIA, SALES CENTRE
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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://data.aad.gov.au/metadata/records/VHMap&rft.title=Geological map of high-grade gneisses in the northern Vestfold Hills&rft.identifier=https://data.aad.gov.au/metadata/records/VHMap&rft.publisher=Australian Antarctic Data Centre&rft.description=The Vestfold Hills are mostly late Archaean-Palaeoproterozoic high grade gneisses that were accreted, metamorphosed and deformed during a short interval of about 50 m.y. spanning the Archaean-Proterozoic boundary. The gneisses are described relative to a simple structural framework dominated by two regional high-grade deformation episodes (D1 and D2), according to whether gneisses were affected by D1, or intruded in the D1 to pre- or syn-D2 interval. The oldest gneisses are volumetrically minor metasedimentary (Taynaya and Chelnok Paragneisses) and metabasic (Tryne Mafic Gneiss) units that were intruded by pre-D1 felsic magmas (Mossel Gneiss protolith). These units were folded and interleaved during a regional high-grade deformation event (D1-M1), and subsequently intruded by regionally extensive and compositionally diverse magmas gneisses and Crooked Lake group protolith). Pre-D1 gneisses and Crooked Lake Group intrusives were then deformed and metamorphosed in a second regional high-grade deformation event (D2-M2), closely followed by regional open warping. Subsequent geological activity in the Vestfold Hills was dominated by ocalised deformation and dyke emplacement. At least 8 major dyke suites and many localised deformation episodes have been defined based on structural, geochemical and cross-cutting criteria.&rft.creator=SNAPE, IAN &rft.creator=GEOSCIENCE AUSTRALIA, SALES CENTRE &rft.date=1999&rft.coverage=northlimit=-68.4; southlimit=-68.6; westlimit=78; eastLimit=78.6; projection=WGS84&rft.coverage=northlimit=-68.4; southlimit=-68.6; westlimit=78; eastLimit=78.6; projection=WGS84&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=VHMap when using these data.&rft_subject=geoscientificInformation&rft_subject=ROCKS/MINERALS/CRYSTALS&rft_subject=EARTH SCIENCE&rft_subject=SOLID EARTH&rft_subject=NOT APPLICABLE&rft_subject=CONTINENT > ANTARCTICA > Vestfold HIlls&rft_subject=GEOGRAPHIC REGION > POLAR&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=VHMap when using these data.

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Brief description

The Vestfold Hills are mostly late Archaean-Palaeoproterozoic high grade gneisses that were accreted, metamorphosed and deformed during a short interval of about 50 m.y. spanning the Archaean-Proterozoic boundary. The gneisses are described relative to a simple structural framework dominated by two regional high-grade deformation episodes (D1 and D2), according to whether gneisses were affected by D1, or intruded in the D1 to pre- or syn-D2 interval. The oldest gneisses are volumetrically minor metasedimentary (Taynaya and Chelnok Paragneisses) and metabasic (Tryne Mafic Gneiss) units that were intruded by pre-D1 felsic magmas (Mossel Gneiss protolith). These units were folded and interleaved during a regional high-grade deformation event (D1-M1), and subsequently intruded by regionally extensive and compositionally diverse magmas gneisses and Crooked Lake group protolith). Pre-D1 gneisses and Crooked Lake Group intrusives were then deformed and metamorphosed in a second regional high-grade deformation event (D2-M2), closely followed by regional open warping. Subsequent geological activity in the Vestfold Hills was dominated by ocalised deformation and dyke emplacement. At least 8 major dyke suites and many localised deformation episodes have been defined based on structural, geochemical and cross-cutting criteria.

Issued: 1999-10-06

Data time period: 1992-11-01 to 1994-03-31

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78.6,-68.4 78.6,-68.6 78,-68.6 78,-68.4 78.6,-68.4

78.3,-68.5

text: northlimit=-68.4; southlimit=-68.6; westlimit=78; eastLimit=78.6; projection=WGS84

Subjects
CONTINENT > ANTARCTICA > Vestfold HIlls | EARTH SCIENCE | GEOGRAPHIC REGION > POLAR | NOT APPLICABLE | ROCKS/MINERALS/CRYSTALS | SOLID EARTH | geoscientificInformation |

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AU-ANL:PEAU : http://nla.gov.au/nla.party-617536

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