The direction of magma flow and behaviour of the magma in the formation of the Ferrar Large Igneous Province 180 million years ago, Pandora Spyre and Terra Cotta Mountain, Victoria Land
Entry ID: K061_2007_2008_NZ_1

[ Update this Record ]

Summary
Abstract: Exposed at Terra Cotta Mountain and Pandora Spyre are vertical bladelike bodies of basaltic rock which cut across older pale colored sedimentary rocks. The pathway the magma took to the earth's surface when it erupted and the behaviour of rising basaltic magma as it advanced towards the surface was investigated. Field observations of dyke texture, vesicularity, crystal population and lithic fragment content, dyke contacts with the country rock and joint patterns within the dykes, field measurements of veins, joints and fractures in country rock next to the dykes and sills was all investigated. Numerous rock samples were analysed by anisotropic magnetic susceptibility (AMS) to determine magma flow direction. A petrological study to determine mineralogy and degree of glassiness (which is a good indicator of magma fluidity) was carried out and a geochemical study of collected rock samples at Pandora Spyre and Terra Cotta Mountain was used to interpret if the magma was provided by separate events from distinct sources or not, and whether the magmas formed by various degrees of partial melting from the same source and the degree of assimilation/contamination of these magmas.

Related URL
Link: VIEW PROJECT HOME PAGE
Description: Information about the investigators


Geographic Coverage
 N: -77.7263 S: -77.9006  E: 161.343  W: 161.333
 Min Altitude: 800  Max Altitude: 2000

Temporal Coverage
Start Date: 2007-11-20
Stop Date: 2007-12-20


Paleo_Temporal_Coverage
Paleo Start Date: 180 Ma
Paleo Stop Date: 180 Ma
Chrono Unit:


Location Keywords
CONTINENT > ANTARCTICA > Pandora Spyre
CONTINENT > ANTARCTICA > Terra Cotta Mountain
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Science Keywords
PALEOCLIMATE >LAND RECORDS >VOLCANIC DEPOSITS    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >ELEMENTS >MAJOR ELEMENTS    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >ELEMENTS >MINOR ELEMENTS    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >ELEMENTS >TRACE ELEMENTS    [Definition]
SOLID EARTH >GEOMAGNETISM >PALEOMAGNETISM    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >IGNEOUS ROCKS    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >MINERALS    [Definition]
SOLID EARTH >TECTONICS >PLATE TECTONICS >STRESS    [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 >VOLCANIC ACTIVITY >ERUPTION DYNAMICS >PYROCLASTICS 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. Please contact the investigator for more information.


Data Set Progress
IN WORK


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


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



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

[ Update this Record ]


Link to Web Site