Abstract:
1:50,000 geological mapping of the Thundergut area was conducted covering an area from the western tip of the Kukri Hills, as far west as the Solitary Rocks, Friis Hills and Asgard Ranges and as far north as the Wright Valley, with the northern limits determined by the time available. Mapping involved an examination of all rock types encountered in the field. Basement studies will attempt to unravel the structural development and relationship between Koettlitz Group metasediments and associated, interrelated orthogneisses. Mapping of granitoids intruding meta-sediments and orthogneisses concentrated on defining individual intrusive bodies and deciphering an intrusive sequence. Samples retrieved during the fieldwork were analysed and the validity and consistency of these two suites were tested over a larger area as part of ongoing labwork after initial map production. In addition, extensive mapping was completed on the southern wall of the Wright Valley. Three specific problems were targeted during this work. Initial mapping found the presence of two granitoid plutions above the lower dolerite sill but the contact relations at this altitude were obscured by the Heimdall Glacier and moraine deposits. Mapping lower on the southern wall of the Wright Valley aimed at observing the contact of these two plutons and determining their relative ages. The second aim of the mapping was to tie the Bull Pass drillsite core into the intrusive sequence. This would allow samples of this core to be used for geochemical and dating analysis when funding permits. The third aim was to try to tie the U-Pb date from an Olympus Granite Gneiss sample near the Connor Glacier into the intrusive sequences and gain further absolute age control on geologic events in Southern Victoria Land.
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Description:
Rock samples are catalogued on the PETLAB database. Search under Collector for I.M. Turnbull, P.J. Forsyth and RJ Sewell and Country = Antarctica.
All data is in the publications. Rock samples are held by GNS and are catalogued in the PETLAB database. Please contact the investigator for more information.
Name:
SHULAMIT
GORDON Phone:
+64 3 358 0200
Fax:
+64 3 358 0211
Email:
s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745 City:
Christchurch
Country:
New Zealand
Personnel
IAN
M.
TURNBULL Role:
TECHNICAL CONTACT
Phone:
+64 3 479 9678
Fax:
+64 3 477 5232
Email:
I.Turnbull at gns.cri.nz
Contact Address:
Institute of Geological and Nuclear Sciences Ltd
Private Bag 1930 City:
Dunedin
Postal Code:
1930
Country:
NEW ZEALAND
CEISHA
POIROT Role:
DIF AUTHOR
Phone:
+64 3 358 0200
Fax:
+64 3 358 0211
Email:
c.poirot at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745 City:
Christchurch
Country:
New Zealand
SHULAMIT
GORDON Role:
DIF AUTHOR
Phone:
+64 3 358 0200
Fax:
+64 3 358 0211
Email:
s.gordon at antarcticanz.govt.nz
Contact Address:
Antarctica New Zealand
Private Bag 4745 City:
Christchurch
Country:
New Zealand
Publications/References
Allibone, A.H. Forsyth, P.J. Sewell, R.J. Turnbull, I.M. Bradshaw, M.A. 1991 Geology of the Thundergut Sheet, southern Victoria Land, Antarctica 1:50 000. Map (1 sheet) and notes. Wellington Department of Scientific and Industrial Research New Zealand Geological Survey miscellaneous series map 21
Allibone, A.H. 1992 Low pressure/high temperature metamorphism of Koettlitz Group schists, Taylor Valley and upper Ferrar Glacier area, south Victoria Land, Antarctica. New Zealand journal of geology and geophysics 35(2): 115-127
Allibone, A.H. Cox, S.C. Smillie, R.W. 1991 Pre-Devonian rocks. Geology of the Thundergut Sheet, southern Victoria Land, Antarctica 1:50 000. Map (1 sheet) and notes. Allibone, A.H. Forsyth, P.J. Sewell, R.J. Turnbull, I.M. (eds) Wellington Department of Scientific and Industrial Research New Zealand Geological Survey miscellaneous series map 21
Turnbull, I. M.; Allibone, A. H.; Sewell, R. J.; Forsyth, P. J. 1989: Geology of the Thundergut Area: K111 Immediate Scientific report to the RDRC. New Zealand Geological Survey, Lower Hutt.
Creation and Review Dates
DIF Creation Date:
2009-06-22
Last DIF Revision Date:
2009-06-30
