The genesis and age of the Grunehogna Granite and Rb–Sr and Sm–Nd chemistry of the Annandagstoppane Granite, Ahlmanryggen, Dronning Maud Land, Antarctica
Interpretations of Rb–Sr and Sm–Nd data from the Grunehogna Granite demonstrate that anatexis of and mixing with Høgfonna Formation sedimentary rocks, caused by hot basic sills of ~1100 Ma Borgmassivet Suite, are consistent, with the granite εNdεSr100Ma data, partially overlapping Borgmassivet Suite...
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ftnipr:oai:nipr.repo.nii.ac.jp:00016874 2023-05-15T13:46:39+02:00 The genesis and age of the Grunehogna Granite and Rb–Sr and Sm–Nd chemistry of the Annandagstoppane Granite, Ahlmanryggen, Dronning Maud Land, Antarctica 2021-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16874 http://id.nii.ac.jp/1291/00016743/ en eng https://doi.org/10.1016/j.polar.2021.100717 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16874 http://id.nii.ac.jp/1291/00016743/ Polar Science, 30, 100717(2021-12) 18739652 Grunehogna granite Borgmassivet suite gabbro and tonalite Age Genesis Annandagstopane granite Journal Article 2021 ftnipr https://doi.org/10.1016/j.polar.2021.100717 2023-02-18T20:11:55Z Interpretations of Rb–Sr and Sm–Nd data from the Grunehogna Granite demonstrate that anatexis of and mixing with Høgfonna Formation sedimentary rocks, caused by hot basic sills of ~1100 Ma Borgmassivet Suite, are consistent, with the granite εNdεSr100Ma data, partially overlapping Borgmassivet Suite data and are marginally displaced toward published data from the Høgfonna Formation. Upper intercept LA-ICPMS U–Pb data from the Grunehogna Granite and Borgmassivet Suite zircons are within error at 1088 ± 17Ma and 1088 ± 68Ma, and are consistent with with unpublished data for the gabbro of 1107Ma. Interpretations of syn-depositional anatexis of semi-consolidated sediments under, high pH2O, are consistent with deposition at ~1130-1107Ma for the Høgfonna Formation. Sm–Nd data define an age of 3058 ± 116Ma for the Annandagstoppane Granite, consistent with a reported U–Pb zircon age of 3067± 8Ma. Rb–Sr data for the Annandagstoppane Granite define an errorchron of 2252 ± 82Ma. Differences between Rb–Sr and Sm–Nd data suggest that Rb–Sr systematics in many samples from all units have experienced open system behaviour in contrast to Sm–Nd systematics from which no disturbance is apparent. Localised tonalitic partial melts of gabbro yield an upper intercept LA-ICPMS U–Pb age from zircon of 1114 ± 47Ma. Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land Polar Science Polar Science National Institute of Polar Research Repository, Japan Dronning Maud Land Grunehogna ENVELOPE(-2.750,-2.750,-72.033,-72.033) Borgmassivet ENVELOPE(-3.500,-3.500,-72.667,-72.667) Annandagstoppane ENVELOPE(-6.250,-6.250,-72.517,-72.517) Høgfonna ENVELOPE(-3.550,-3.550,-72.750,-72.750) Polar Science 30 100717 |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
topic |
Grunehogna granite Borgmassivet suite gabbro and tonalite Age Genesis Annandagstopane granite |
spellingShingle |
Grunehogna granite Borgmassivet suite gabbro and tonalite Age Genesis Annandagstopane granite The genesis and age of the Grunehogna Granite and Rb–Sr and Sm–Nd chemistry of the Annandagstoppane Granite, Ahlmanryggen, Dronning Maud Land, Antarctica |
topic_facet |
Grunehogna granite Borgmassivet suite gabbro and tonalite Age Genesis Annandagstopane granite |
description |
Interpretations of Rb–Sr and Sm–Nd data from the Grunehogna Granite demonstrate that anatexis of and mixing with Høgfonna Formation sedimentary rocks, caused by hot basic sills of ~1100 Ma Borgmassivet Suite, are consistent, with the granite εNdεSr100Ma data, partially overlapping Borgmassivet Suite data and are marginally displaced toward published data from the Høgfonna Formation. Upper intercept LA-ICPMS U–Pb data from the Grunehogna Granite and Borgmassivet Suite zircons are within error at 1088 ± 17Ma and 1088 ± 68Ma, and are consistent with with unpublished data for the gabbro of 1107Ma. Interpretations of syn-depositional anatexis of semi-consolidated sediments under, high pH2O, are consistent with deposition at ~1130-1107Ma for the Høgfonna Formation. Sm–Nd data define an age of 3058 ± 116Ma for the Annandagstoppane Granite, consistent with a reported U–Pb zircon age of 3067± 8Ma. Rb–Sr data for the Annandagstoppane Granite define an errorchron of 2252 ± 82Ma. Differences between Rb–Sr and Sm–Nd data suggest that Rb–Sr systematics in many samples from all units have experienced open system behaviour in contrast to Sm–Nd systematics from which no disturbance is apparent. Localised tonalitic partial melts of gabbro yield an upper intercept LA-ICPMS U–Pb age from zircon of 1114 ± 47Ma. |
format |
Article in Journal/Newspaper |
title |
The genesis and age of the Grunehogna Granite and Rb–Sr and Sm–Nd chemistry of the Annandagstoppane Granite, Ahlmanryggen, Dronning Maud Land, Antarctica |
title_short |
The genesis and age of the Grunehogna Granite and Rb–Sr and Sm–Nd chemistry of the Annandagstoppane Granite, Ahlmanryggen, Dronning Maud Land, Antarctica |
title_full |
The genesis and age of the Grunehogna Granite and Rb–Sr and Sm–Nd chemistry of the Annandagstoppane Granite, Ahlmanryggen, Dronning Maud Land, Antarctica |
title_fullStr |
The genesis and age of the Grunehogna Granite and Rb–Sr and Sm–Nd chemistry of the Annandagstoppane Granite, Ahlmanryggen, Dronning Maud Land, Antarctica |
title_full_unstemmed |
The genesis and age of the Grunehogna Granite and Rb–Sr and Sm–Nd chemistry of the Annandagstoppane Granite, Ahlmanryggen, Dronning Maud Land, Antarctica |
title_sort |
genesis and age of the grunehogna granite and rb–sr and sm–nd chemistry of the annandagstoppane granite, ahlmanryggen, dronning maud land, antarctica |
publishDate |
2021 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16874 http://id.nii.ac.jp/1291/00016743/ |
long_lat |
ENVELOPE(-2.750,-2.750,-72.033,-72.033) ENVELOPE(-3.500,-3.500,-72.667,-72.667) ENVELOPE(-6.250,-6.250,-72.517,-72.517) ENVELOPE(-3.550,-3.550,-72.750,-72.750) |
geographic |
Dronning Maud Land Grunehogna Borgmassivet Annandagstoppane Høgfonna |
geographic_facet |
Dronning Maud Land Grunehogna Borgmassivet Annandagstoppane Høgfonna |
genre |
Antarc* Antarctica Dronning Maud Land Polar Science Polar Science |
genre_facet |
Antarc* Antarctica Dronning Maud Land Polar Science Polar Science |
op_relation |
https://doi.org/10.1016/j.polar.2021.100717 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=16874 http://id.nii.ac.jp/1291/00016743/ Polar Science, 30, 100717(2021-12) 18739652 |
op_doi |
https://doi.org/10.1016/j.polar.2021.100717 |
container_title |
Polar Science |
container_volume |
30 |
container_start_page |
100717 |
_version_ |
1766244960633356288 |