Mapping of the relationship among country rock, non-explosive intrusive rocks and deposits of explosive eruptions of the Mawson Formation in the Allan Hills as an indication of phreatomagmatic eruption processes
Entry ID: K061_2001_2002_NZ_1

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Summary
Abstract: Phreatomagmatic eruptions are common and dangerous worldwide. How large explosive event complexes evolve during eruptions, the processes that drive the evolution and what is in the rock record was studied in the Mawson Formation in Allan Hills, Victoria Land. The Mawson Formation is a unit of fragmented volcanic rock comprising debris from the Beacon Supergroup mixed with fragments from Ferrar Group magmas. It represents part of a regional province dominated by debris from eruptions with extensive exposure. Standard geological mapping techniques, observations, photographs and sketches were used to map the relationship among country rock, non-explosive intrusive rocks and deposits of explosive eruptions preserved in both volcanic craters and areas surrounding the craters. One aspect of the study area revealed an extensive zone of broken country rock and associated chaotic deposits that are inferred to represent extensive landsliding toward the main outcrop area of the Mawson Formation on Allan Hills. This area was investigated in detail.

Related URL
Link: GET DATA
Description: Samples stores with the Institute of Geological and Nuclear Sciences, New Zealand


Link: VIEW PROJECT HOME PAGE
Description: Information about the investigators study


Geographic Coverage
 N: -78.7333 S: -78.7333  E: 159.65  W: 159.65

Temporal Coverage
Start Date: 2001-11-28
Stop Date: 2001-12-22


Location Keywords
CONTINENT > ANTARCTICA > Coombs Hills
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Science Keywords
PALEOCLIMATE >LAND RECORDS >VOLCANIC DEPOSITS    [Definition]
SOLID EARTH >GEOMAGNETISM >PALEOMAGNETISM    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >IGNEOUS ROCKS    [Definition]
SOLID EARTH >TECTONICS >VOLCANIC ACTIVITY >ERUPTION DYNAMICS    [Definition]
SOLID EARTH >TECTONICS >VOLCANIC ACTIVITY >ERUPTION DYNAMICS >LAVA COMPOSITION/TEXTURE    [Definition]
SOLID EARTH >TECTONICS >VOLCANIC ACTIVITY >ERUPTION DYNAMICS >MAGMA COMPOSITION/TEXTURE    [Definition]
SOLID EARTH >TECTONICS >PLATE TECTONICS    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


Platform
GROUND-BASED OBSERVATIONS    [Information]


Quality
Any remaining geological samples are lodged in the geology department, University of Otago. All data is in the MSc thesis. Some photographs and field notebooks may reside with the investigator.


Data Set Progress
COMPLETE


Originating Center


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
JAMES D.L WHITE
Role: INVESTIGATOR
Phone: +64 3 479 7519
Fax: +64 4 479 7527
Email: james.white at stonebow.otago.ac.nz
Contact Address:
Geology department
Universoty of Otago
PO Box 56
Dunedin
Country: NEW ZEALAND


GILLIAN LOCKETT
Role: INVESTIGATOR


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
Lockett, G. 2003. Fragmentation along the contact of a large phreatomagmatic vent complex with adjacent country rock, Allan Hills, Antarctica. MSc Thesis, Department of Geology, University of Otago, Dunedin, New Zealand.

Lockett, G. And White, J.D.L. 2007 online. Relationships among country rock, deposits of a volcanically triggered debris avalanche, and mafic volcaniclastic deposits of the Mawson Formation, Ferrar LIP, Mt Watters, Allan Hlls, Antarctica. In: Physical Volcanology of Large Igneous Provinces. Skilling, I.P. and White, J.D.L. (eds.) Journal of Volcanology and Geothermal Research.

Creation and Review Dates
DIF Creation Date: 2005-10-11
Last DIF Revision Date: 2009-02-13

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