GCMD

A collection of lithospheric xenoliths from the Executive Committee Range and Mt Murphy Volcanic Complex in West Antarctica and the McMurdo Volcanic Province in McMurdo Sound

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Originator: Unknown
Publication_Date: Unknown
Title: A collection of lithospheric xenoliths from the Executive Committee Range and Mt Murphy Volcanic Complex in West Antarctica and the McMurdo Volcanic Province in McMurdo Sound

Description:

Abstract:: Lithospheric xenoliths are a convenient and relatively cost efficient means of gaining an insight into the petrology of the deep earth. As such, they provide important information on lithospheric structure and processes and can be used to gauge thermal regime and possibly , the timing of events. Lithospheric xenoliths were collected in the 1989/90 and 1990/91 season from Marie Byrd Land, West Antarctica, including Mt Waesche, Mt Sidley, Mt Cumming, Mt Hampton and the USAS Escarpment (Mt Aldaz) in the Executive Committee Range and Mt Murphy in the Mount Murphy Volcanic Complex. Further samples were collected in the 1992/93 season from the McMurdo Volcanic Province at a number of localities on and adjacent to Ross Island (Hut Point Peninsula (Half Moon Crater, Sulphur Cones, Turtle Rock) and Cape Bird), Black Island and in the foothills of the Transantarctic Mountains (Foster Crater on the Koettlitz Glacier). The majority of the samples collected in the 1992/93 season supplemented a collection compiled from the 1982/83 and 1984/85 season. The xenoliths vary from texturally variable, spinel lherzolites and dunites representative of upper mantle assemblages to ultramafic Al-augite kaersutite bearing ultramafic rocks and plagioclase bearing ultramafic to mafic granulites thought to represent the transition zone between upper mantle and lower crust.
Purpose:: Not Available
Supplemental_Information:: REFERENCE: Handler, M.R. Wysoczanski, R.J. Gamble, J.A. 2003 Proterozoic lithosphere in Marie Byrd Land, West Antarctica: Re-Os systematics of spinel peridotite xenoliths. Chemical geology 196: 131-145
Supplemental_Information:: REFERENCE: Wysoczanski, R. 1993 Mineral and rock analyses of lithospheric xenoliths from Marie Byrd Land, Antarctica. Wellington Victoria University of Wellington Antarctic data series no. 17
Supplemental_Information:: REFERENCE: Wysoczanski, R.J. Gamble, J.A. 1992 Xenoliths from the volcanic province of West Antarctica and implications for lithospheric structure and processes. Recent progress in Antarctic earth science. Yoshida, Y., Kaminuma, K., Shiraishi, K. (eds), Tokyo Terrapub
Supplemental_Information:: REFERENCE: Wysoczanski, R.J. 1993 Lithospheric xenoliths from the Marie Byrd Land Volcanic Province, Antarctica. PhD thesis, Victoria University of Wellington, New Zealand.
Supplemental_Information:: REFERENCE: Wysoczanski, R.J. Gamble, J.A. Kyle, P.R. Thirlwall, M.F. 1995 The petrology of lower crustal xenoliths from the Executive Committee Range, Marie Byrd Land Volcanic Province, West Antarctica. Lithos 36(3-4): 185-201

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Range_of_Dates/Times:

Beginning_Date: 19921114
Ending_Date: 19921201

Currentness_Reference:Unknown

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

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