Summary Gravity and GPS measurement as well as accompanying ice thickness determinations were performed along a tractor traverse from Patriot Hills to the South Pole, covering a distance of more than 1100 km. Special con-siderations were necessary to reasonably calculate the drift of the gravimeter...
Other Authors: | |
---|---|
Format: | Text |
Language: | English |
Subjects: | |
Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.3817 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea012.pdf |
id |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.579.3817 |
---|---|
record_format |
openpolar |
spelling |
ftciteseerx:oai:CiteSeerX.psu:10.1.1.579.3817 2023-05-15T13:39:13+02:00 The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.3817 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea012.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.3817 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea012.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea012.pdf text ftciteseerx 2016-01-08T12:54:27Z Summary Gravity and GPS measurement as well as accompanying ice thickness determinations were performed along a tractor traverse from Patriot Hills to the South Pole, covering a distance of more than 1100 km. Special con-siderations were necessary to reasonably calculate the drift of the gravimeter used. Bouguer and ice layer corrections were accomplished by two-dimensional model calculations. The resulting complete Bouguer anomaly oscillates around zero along the northern section of the profile and starts to decrease 200 to 300 km before entering the East-Antarctic craton where it stabilizes at about-130 mGal. Isostatic modelling yields a positive residual anomaly of about 70 mGal over East-Antarctica which can be explained by additional masses in the crust, e.g. assuming an in-creased density in the lower crust. Alternative models which incorporate lighter sediments in West-Antarctica or which are isostatically unbalanced are conceivable. Text Antarc* Antarctic Antarctica East Antarctica South pole South pole West Antarctica Unknown Antarctic East Antarctica Patriot Hills ENVELOPE(-81.333,-81.333,-80.333,-80.333) South Pole West Antarctica |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftciteseerx |
language |
English |
description |
Summary Gravity and GPS measurement as well as accompanying ice thickness determinations were performed along a tractor traverse from Patriot Hills to the South Pole, covering a distance of more than 1100 km. Special con-siderations were necessary to reasonably calculate the drift of the gravimeter used. Bouguer and ice layer corrections were accomplished by two-dimensional model calculations. The resulting complete Bouguer anomaly oscillates around zero along the northern section of the profile and starts to decrease 200 to 300 km before entering the East-Antarctic craton where it stabilizes at about-130 mGal. Isostatic modelling yields a positive residual anomaly of about 70 mGal over East-Antarctica which can be explained by additional masses in the crust, e.g. assuming an in-creased density in the lower crust. Alternative models which incorporate lighter sediments in West-Antarctica or which are isostatically unbalanced are conceivable. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.3817 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea012.pdf |
long_lat |
ENVELOPE(-81.333,-81.333,-80.333,-80.333) |
geographic |
Antarctic East Antarctica Patriot Hills South Pole West Antarctica |
geographic_facet |
Antarctic East Antarctica Patriot Hills South Pole West Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica South pole South pole West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica South pole South pole West Antarctica |
op_source |
http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea012.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.579.3817 http://pubs.usgs.gov/of/2007/1047/ea/of2007-1047ea012.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766116235688280064 |