Link to Web Site Portal Home
Record Search Query: [Freetext='DIF/IDN_Node: AMD/NZ']
K-Ar and Rb-Sr dating of collected rocks from the Priestley Formation, Bowers/Wilson and Bowers/Robertson Bay Terrane boundaries in the Preistley and Mariner Glacier areas, North Victoria Land
Entry ID: K231_1990_1991_NZ_1


[ Update this Record ]

Summary
Abstract: One of the best exposed geological cross sections of the Antarctic continent occurs in the northern sector of the Transantarctic Mountains along the west coast of the Ross Sea in North Victoria Land. Geological investigations of the region reveal a cross section of a late Precambrian-Palaeozoic mobile orogenic belt, segmented into distinctive 'terranes' and further disrupted by Cretaceous-Cenozoic break up tectonics of Gondwanaland in the Ross Sea region. Field sampling for K-Ar and Rb-Sr geochronological studies in the Priestley and Mariner Glacier areas was undertaken during the first half of the 1990/91 Italiantartide Expedition at Terra Nova Bay Station, Antarctica, as part of a regional 1: 250,000 geological mapping programme in North Victoria Land. Some 320 samples were collected. A sequence of samples from the Priestley Formation in the upper Priestley Glacier was collected for K-Ar and Rb-Sr dating of early regional metamorphism (late Precambrian and/or early Palaeozoic) in the Wilson Terrane basement. Possible correlatives at higher metamorphic grade were collected for similar work in the upper Boomerang and lower Preistley Glaciers (Preistley Schists) and on the coast around Terra Nova Bay. Samples were also collected from the Bowers/Wilson and Bowers/Robertson Bay Terrane boundaries in the Mariner Glacier region, especially in the Mountaineer and Millen Ranges. Rocks from the Bowers and Robertson Bay Groups are in the intervening Millen Schists and may help to identify the timing of fault movement at the terrane boundaries and hence their amalgamation.
Geographic Coverage
 N: -72.0 S: -75.0  E: 170.0  W: 160.0

Temporal Coverage
Start Date: 1990-12-10
Stop Date: 1991-01-22


Location Keywords
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Science Keywords
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >AGE DETERMINATIONS    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >IGNEOUS ROCKS    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


Platform
FIELD SURVEYS    [Information]
GROUND-BASED OBSERVATIONS    [Information]
FIELD INVESTIGATION    [Information]


Instrument
VISUAL OBSERVATIONS    [Information]


Quality
No samples remain as they are destroyed in the analysis. Please contact the investigator for more information or refer to the publication.


Data Set Progress
COMPLETE


Data Center
Antarctica New Zealand, New Zealand Antarctic Institute, New Zealand    [Information]
Data Center URL: http://www.antarcticanz.govt.nz/

Data Center Personnel
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
CHRIS J ADAMS
Role: INVESTIGATOR
Phone: +64 3 479 9671
Fax: +64 3 477 5232
Email: c.adams at gns.cri.nz
Contact Address:
GNS Science
Private Bag 1930
City: Dunedin
Postal Code: 9054
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
Adams, C.J. Höhndorf, A. 1991 Age of the metamorphic basement of Salamander and Lanterman ranges, northern Victoria Land, Antarctica. Geological evolution of Antarctica; proceedings of the Fifth International Symposium on Antarctic Earth Sciences, Cambridge, 1987. Thomson, M.R.A. Crame, J.A. Thomson, J.W. (eds) Cambridge Cambridge University Press 521372666

Creation and Review Dates
DIF Creation Date: 2009-05-21
Last DIF Revision Date: 2009-06-22


  Reformat as FGDC document



[ Update this Record ]