Petrology, geochemistry and K-Ar Age determination of De Gerlache Seamount basalts ...
The De Gerlache Seamounts are two topographic highs in the Bellingshausen Sea, southeastern Pacific. Petrological and geochemical studies together with K-Ar age determinations were carried out on four dredged basalt samples collected during a RV Polarstern expedition (ANT-XII/4) in 1995. Minor and t...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA
2007
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.743234 https://doi.pangaea.de/10.1594/PANGAEA.743234 |
id |
ftdatacite:10.1594/pangaea.743234 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.743234 2024-09-15T17:41:06+00:00 Petrology, geochemistry and K-Ar Age determination of De Gerlache Seamount basalts ... Hagedorn, Birgit Gersonde, Rainer Gohl, Karsten Hubberten, Hans-Wolfgang 2007 application/zip https://dx.doi.org/10.1594/pangaea.743234 https://doi.pangaea.de/10.1594/PANGAEA.743234 en eng PANGAEA Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 Dredge ANT-XII/4 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo article Collection Supplementary Publication Series of Datasets 2007 ftdatacite https://doi.org/10.1594/pangaea.743234 2024-07-03T13:16:23Z The De Gerlache Seamounts are two topographic highs in the Bellingshausen Sea, southeastern Pacific. Petrological and geochemical studies together with K-Ar age determinations were carried out on four dredged basalt samples collected during a RV Polarstern expedition (ANT-XII/4) in 1995. Minor and trace element composition suggest alkaline basalt compositions. Compared to alkaline basalts of adjacent West Antarctica (the Jones Mountains) and of Peter I Island, the samples have lower mg-numbers, lower Ni and Cr contents and lower high field-strength elements (HFSE)/Nb and large-ion lithophile elements (LILE)/HFSE ratios. Three of the four samples have low K, Rb, and Cs concentrations relative to alkaline basalts. The K-depletion and other elemental concentrations may be explained by 1.1% melting of amphibole bearing mantle material. Additionally, low Rb and Ba values suggest low concentrations of these elements in the mantle source. K-Ar age determinations yield Miocene ages (20-23 Ma) that are similar in age ... : Supplement to: Hagedorn, Birgit; Gersonde, Rainer; Gohl, Karsten; Hubberten, Hans-Wolfgang (2007): Petrology, Geochemistry and K-Ar Age constraints of the dastern De Gerlache Seamount alkaline basalts (Bellingshausen Sea, Southeast Pacific). Polarforschung, 76(3), 87-94 ... Article in Journal/Newspaper Antarc* Antarctica Bellingshausen Sea Peter I Island West Antarctica DataCite |
institution |
Open Polar |
collection |
DataCite |
op_collection_id |
ftdatacite |
language |
English |
topic |
Dredge ANT-XII/4 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
spellingShingle |
Dredge ANT-XII/4 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Hagedorn, Birgit Gersonde, Rainer Gohl, Karsten Hubberten, Hans-Wolfgang Petrology, geochemistry and K-Ar Age determination of De Gerlache Seamount basalts ... |
topic_facet |
Dredge ANT-XII/4 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
description |
The De Gerlache Seamounts are two topographic highs in the Bellingshausen Sea, southeastern Pacific. Petrological and geochemical studies together with K-Ar age determinations were carried out on four dredged basalt samples collected during a RV Polarstern expedition (ANT-XII/4) in 1995. Minor and trace element composition suggest alkaline basalt compositions. Compared to alkaline basalts of adjacent West Antarctica (the Jones Mountains) and of Peter I Island, the samples have lower mg-numbers, lower Ni and Cr contents and lower high field-strength elements (HFSE)/Nb and large-ion lithophile elements (LILE)/HFSE ratios. Three of the four samples have low K, Rb, and Cs concentrations relative to alkaline basalts. The K-depletion and other elemental concentrations may be explained by 1.1% melting of amphibole bearing mantle material. Additionally, low Rb and Ba values suggest low concentrations of these elements in the mantle source. K-Ar age determinations yield Miocene ages (20-23 Ma) that are similar in age ... : Supplement to: Hagedorn, Birgit; Gersonde, Rainer; Gohl, Karsten; Hubberten, Hans-Wolfgang (2007): Petrology, Geochemistry and K-Ar Age constraints of the dastern De Gerlache Seamount alkaline basalts (Bellingshausen Sea, Southeast Pacific). Polarforschung, 76(3), 87-94 ... |
format |
Article in Journal/Newspaper |
author |
Hagedorn, Birgit Gersonde, Rainer Gohl, Karsten Hubberten, Hans-Wolfgang |
author_facet |
Hagedorn, Birgit Gersonde, Rainer Gohl, Karsten Hubberten, Hans-Wolfgang |
author_sort |
Hagedorn, Birgit |
title |
Petrology, geochemistry and K-Ar Age determination of De Gerlache Seamount basalts ... |
title_short |
Petrology, geochemistry and K-Ar Age determination of De Gerlache Seamount basalts ... |
title_full |
Petrology, geochemistry and K-Ar Age determination of De Gerlache Seamount basalts ... |
title_fullStr |
Petrology, geochemistry and K-Ar Age determination of De Gerlache Seamount basalts ... |
title_full_unstemmed |
Petrology, geochemistry and K-Ar Age determination of De Gerlache Seamount basalts ... |
title_sort |
petrology, geochemistry and k-ar age determination of de gerlache seamount basalts ... |
publisher |
PANGAEA |
publishDate |
2007 |
url |
https://dx.doi.org/10.1594/pangaea.743234 https://doi.pangaea.de/10.1594/PANGAEA.743234 |
genre |
Antarc* Antarctica Bellingshausen Sea Peter I Island West Antarctica |
genre_facet |
Antarc* Antarctica Bellingshausen Sea Peter I Island West Antarctica |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.743234 |
_version_ |
1810487196145156096 |