Geology of the Stillwell Hills

Maintenance and Update Frequency: unknown Statement: Unknown The Stillwell Hills region comprises granulite facies gneisses which record evidence for multiple periods of deformation and metamorphism spanning more than 2500 Million years. The predominant orthogneiss package (Stillwell Orthogneiss) re...

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Bibliographic Details
Other Authors: CCARSON (custodian), Carson, C. (author), Clarke, G.L. (author), Commonwealth of Australia (Geoscience Australia) (distributor), Commonwealth of Australia (Geoscience Australia) (owner), Commonwealth of Australia (Geoscience Australia) (pointOfContact), EGD (hasAssociationWith), Fitzherbert, J.A. (author), Gerakiteys, C.L. (author), Halpin, J.A (author), Kelly, N.M. (author), Manager Client Services (custodian), Schroter, F.C. (author)
Format: Text
Language:unknown
Published: Australian Ocean Data Network
Subjects:
geoscientificInformation
Geological Map
25K scale
Antarctic data
geology
marine
AQ
EARTH SCIENCES
Published_External
Antarctic
Scoresby
Stefansson
Stillwell Hills
Dovers
Point Noble
Antarc*
Enderby Land
Online Access:https://researchdata.edu.au/geology-stillwell-hills/688417
https://pid.geoscience.gov.au/dataset/ga/72717
Description
Summary:Maintenance and Update Frequency: unknown Statement: Unknown The Stillwell Hills region comprises granulite facies gneisses which record evidence for multiple periods of deformation and metamorphism spanning more than 2500 Million years. The predominant orthogneiss package (Stillwell Orthogneiss) represents the margin of an Archaean craton exposed in Enderby Land, some 150 km to the west that was reworked during the late Proterozoic. Younger additions to the crust include Palaeoproterozoic charnockitic gneiss (Scoresby Charnockite) and Meso-Neoproterozoic mafic sills and dykes (Point Noble Gneiss, Kemp Dykes) and felsic pegmatites (Cosgrove Pegmatites). Subordinate supracrustal rocks, including metaquartzite, metapelitic, metapsammitic and calc-silicate gneiss (Dovers Paragneiss, Sperring Paragneiss, Stefansson Paragneiss, Keel Layered Paragneiss, Ives Gneiss) are intercalated and interfolded with the Archaean-Palaeoproterozoic orthogneisses.

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