Determination of the Sirius Group (Neogene deposits) mode of deposition at Allan Hills, Mt Feather and Table Mountain
Entry ID: K042_1997_2001_NZ_1

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Summary
Abstract: An ancient glacial deposit termed the Sirius Group is a collection of Neogene deposits that crop out at high elevations throughout the Transantarctic Mountains (TAM). The paleoflow direction and how the Sirius Group was deposited, whether by valley glacier or continental ice sheet, by wet or dry based glacial ice or by a single depositional event or several overriding events was determined at Allan Hills. This low nunatuk has a mean elevation of around 2000 m above sea level, occupying a low point in the TAM, making the site susceptible to overriding by the East Antarctic Ice Sheet during minor volume fluctuations. The area was geologically mapped in detail. The deposits were studied to interpret the nature of the ice that deposited it by detailed investigations of selected major outcrops including orientation measurements of clasts and deformational features at both measured outcrops and stop locations and deposits were described in terms of texture, clast shape, fabric and composition. Rock and surface samples of several deposits of glacial debris and related features were collected for analysis. The orientation on abraded (striated) and faceted clasts throughout the study area was recorded. Striation direction was measured on lodged boulders in deposits and samples for matrix texture and palynology were taken. Several deposits were surveyed for further striation direction and measuring spot heights of the surface on which the Sirius was deposited, providing data for reconstructing the landscape during the deposition of the Sirius deposit. Surface samples and glacial deposits taken at key locations in Allan Hills and features judges to be much younger were collected for surface age dating of cosmogenic isotope. Glacial deposits near the edge of the Manhaul Glacier were studied in detail with glacial abrasions on bedrock and stone surfaces documented and their orientations measured. Mapping of the southern extent (or distribution) of the deposits in the central Allan Hills was completed using differentially corrected GPS to establish stratigraphic relationships to the Sirius Group. Samples from boulders in the Sirius deposits and more distant deposits were collected for surface age dating of cosmogenic isotopes. Samples were also taken of features judged to be much younger, and from surfaces close to the present ice where fresh glacial striae indicate very recent exposure. A minimum age for the formation and rates of erosion for the area was determined. The study was expanded to Table Mountain (an area similar in elevation to Allan Hills but the deposits are more varied) and Mount Feather (highest elevation deposits of the Sirius Group in the Dry Valleys) to provide a regional perspective. Outcrops were described (stone orientations, linear glacial abrasions, planar deformation structures) and samples were collected for thin sectioning, laboratory analysis, clast orientations, linear glacial abrasions and planar deformational structures.

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Link: GET DATA
Description: The PETLAB database that lists the Victoria University of Wellington rock collection.


Link: VIEW RELATED INFORMATION
Description: The Victoria University of Wellington Antarctic Research Centre homepage. All publications and data will be available through this group.


Geographic Coverage
 N: -76.5833 S: -76.8333  E: 160.0  W: 159.4167

Temporal Coverage
Start Date: 1997-12-09
Stop Date: 1997-12-19

Start Date: 1998-12-16
Stop Date: 1999-01-15

Start Date: 1999-11-21
Stop Date: 2000-01-21

Start Date: 2000-11-19
Stop Date: 2000-12-22

Start Date: 2001-11-21
Stop Date: 2001-12-22


Location Keywords
CONTINENT > ANTARCTICA
CONTINENT > ANTARCTICA > ALLAN HILLS
CONTINENT > ANTARCTICA > MT FEATHER
CONTINENT > ANTARCTICA > TABLE MOUNTAIN
GEOGRAPHIC REGION > POLAR


Science Keywords
PALEOCLIMATE >LAND RECORDS >GLACIATION    [Definition]
PALEOCLIMATE >LAND RECORDS >ISOTOPES    [Definition]
PALEOCLIMATE >LAND RECORDS >SEDIMENTS    [Definition]
PALEOCLIMATE >LAND RECORDS >STRATIGRAPHIC SEQUENCE    [Definition]
SOLID EARTH >GEOMORPHIC LANDFORMS/PROCESSES >GLACIAL LANDFORMS    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


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


Instrument
VISUAL OBSERVATIONS    [Information]


Quality
All data is contained in the publication. Rock samples have been catalogued and are stored at Victoria University of Wellington, available through the PETLAB database. Possible samples available from other investigators but its uncertain whether or not they are catalogued. For more information, please contact the investigators.


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
PETER BARRETT
Role: INVESTIGATOR
Phone: +64 4 463 5336
Fax: +64 4 463 5186
Email: peter.barrett at vuw.ac.nz
Contact Address:
Antarctic Research Centre
Victoria University of Wellington
PO BOX 600
City: Wellington
Country: New Zealand


CLIFF ATKINS
Role: INVESTIGATOR
Phone: +64 4 463 6143
Fax: +64 4 463 5186
Email: cliff.atkins at vuw.ac.nz
Contact Address:
School of Geography, Environment and Earth Sciences
Victoria University of Wellington
PO BOX 600
City: Wellington
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
Atkins, C. Barrett, P. Field report for 1997 on glacial deposits at Allan Hills, Antarctica. Wellington, New Zealand: Victoria University of Wellington. 2000. [Antarctic data series no. 22]

Atkins, C.B. Barrett, P.J. Hicock, S.R. Cold glaciers erode and deposit: evidence from Allan Hills, Antarctica. Geology 30(7): 659-662, 2002.

Atkins, C. 2004. Photographic atlas of striations from selected glacial and non-glacial environments. Antarctica. Antarctic Data Series 28. Antarctic Research Centre, School of Earth Sciences, Victoria University of Wellington, New Zealand.

Atkins, C. 2003. Characteristics of striae and clasts in glacial and non-glacial environments. PhD thesis, Victoria University of Wellington, New Zealand.

Barker, P.F. Barrett, P.J. Camerlenghi, A. Cooper, A.K. Davey, F.J. Domack, E.W. Escutia, C. Kristoffersen, Y. O’Brien, P.E. Ice sheet history from Antarctic continental margin sediments: the ANTOSTRAT approach. Terra Antartica 5(4): 737-760, 1998.

Barker, P.F. Barrett, P.J. Cooper, A.K. Huybrechs, P. Antarctic glacial history from numerical models and continental margin sediments. Palaeogeography, palaeoclimatology, palaeoecology 150: 247-267, 1999.

Lloyd Davies, M.T. van der Meer, J.J.M. 2001 Neogene glacial history of the Allan Hills, south Victoria Land, Antarctica-Field Report, 1999-2000. Amsterdam, The Netherlands Centre for Geo-ecological Research ICG Rapporten 2001/4

Lloyd Davies, M.T. van der Meer, J.J.M. 2002 The Glacial History of the East Antarctic Ice Sheet at Allan Hills and Mount Feather and contemporary Glacial processes at Blood Falls, Taylor Valley, Antarctica-Field Report, 2001-2002. Amsterdam, The Netherlands Centre for Geo-ecological Research 907707905X ICG Rapporten 02/3

Lloyd Davies, M.T. 2004 The polar paradise: the glaciation of South Victoria land, Antarctica. 9076894450

Smith, N.D., Barrett, P.J., Holme, P.J. 1998. Glacier fed (?) sandstone sheets in the Weller Coal Measures (Permian) Allan Hills, Antarctica. Palaeogeography, palaeoclimatology, palaeoecology 141 (1/2): 35-51.

Hicock, J.R. Barrett, P.J. Holme, P.J. 2003 Fragment of an ancient outlet glacier system near the top of the Transantarctic Mountains Geology 31(9): 821-824 DOI: 10.1130/G19686

Holme, P.J. 2001. Field and scientific data report : Sirius Group study, Allan Hills, South Victoria Land, Antarctica, Nov 1999 - Jan 2000. Wellington, N.Z. : Antarctic Research Centre, School of Earth Sciences, Victoria University of Wellington 61 pp.

Creation and Review Dates
DIF Creation Date: 2009-03-18
Last DIF Revision Date: 2009-06-02

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