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Ferrar Sill Distribution and Composition
Entry ID: BDM_JHU-Ferrar-Geol


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Summary
Abstract: This set of data describes the geologic occurrence, petrologic nature, and
chemical composition of a series of sheet-like basaltic intrusions, known as
Sills, which occur in the McMurdo Dry Valleys region of the Trans-Antarctic
Mountains of Victoria Land. A geologic map traces the physical occurrence of
theses sills, which are known as the Ferrar Dolerites, over an area of about
5,000 km2. A collection of samples has been made at specific location
throughout the Dry Valleys in order to characterize the petrology of each sill.
Of the four prominent sills in the area (Basement Sill, Peneplain Sill, Asgard
Sill, Mt. Fleming Sill), the majority of sampling involved the Basement and
Peneplain Sills. Data from this collection describe the general petrologic
appearance of the samples and the basic major element concentrations of a
selected subset of the full collection of samples. Some trace element
determinations are in the process of being finalized for these same samples.
This analytical work was performed at Franklin and Marshall University and
Michigan State University and some was done under contract to a commercial
laboratory (SGS Geochemical Laboratories, Ontario, Canada). Additional work is
planned concerning the isotopic (Rb-Sr, Nd-Sm, O-16/18) nature of these
samples. Microprobe chemical analyses of pyroxene and plagioclase crystals in
individual rocks are also a part of this data set.

Geographic Coverage
 N: -62.83 S: -90.0  E: 180.0  W: -180.0

Location Keywords
CONTINENT > ANTARCTICA
GEOGRAPHIC REGION > POLAR


Science Keywords
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >ELEMENTS >MAJOR ELEMENTS    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >IGNEOUS ROCKS    [Definition]
SOLID EARTH >ROCKS/MINERALS/CRYSTALS >IGNEOUS ROCKS >MAP    [Definition]
SOLID EARTH >TECTONICS >VOLCANIC ACTIVITY >ERUPTION DYNAMICS >MAGMA COMPOSITION/TEXTURE    [Definition]


ISO Topic Category
GEOSCIENTIFIC INFORMATION


Data Center
Magmatic Laboratory, Department of Earth and Planetary Sciences, Johns Hopkins University    [Information]
Data Center URL: http://silvermagma.eps.jhu.edu

Data Center Personnel
Name: BRUCE D. MARSH
Phone: 410-516-4652
Fax: 410-516-7933
Email: bmarsh at jhu.edu
Contact Address:
JHU, Oline Hall
Earth and Planetary Sciences
34th and N. Charles Sts.
City: Baltimore
Province or State: MD
Postal Code: 21218
Country: USA


Personnel
BRUCE D. MARSH
Role: DIF AUTHOR
Phone: 410-516-4652
Fax: 410-516-7933
Email: bmarsh at jhu.edu
Contact Address:
JHU, Oline Hall
Earth and Planetary Sciences
34th and N. Charles Sts.
City: Baltimore
Province or State: MD
Postal Code: 21218
Country: USA



Creation and Review Dates
DIF Creation Date: 2005-04-11
Last DIF Revision Date: 2010-07-02


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