Sandstone detrital modes and basinal setting of the Trinity Peninsula Group, northern Graham Land, Antarctic Peninsula: a preliminary survey
Sandstone detrital modes for a representative sample of the Trinity Peninsula Group in northern Graham Land are described and assessed. Whereas the volumetrically dominant quartz and feldspar were derived principally from erosion of a plutonic and high‐rank metamorphic terrane, the lithic population...
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American Geophysical Union
1987
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ftnerc:oai:nora.nerc.ac.uk:522975 2023-05-15T13:41:43+02:00 Sandstone detrital modes and basinal setting of the Trinity Peninsula Group, northern Graham Land, Antarctic Peninsula: a preliminary survey Smellie, John L. McKenzie, Garry D. 1987 http://nora.nerc.ac.uk/id/eprint/522975/ https://doi.org/10.1029/GM040p0199 unknown American Geophysical Union Smellie, John L. 1987 Sandstone detrital modes and basinal setting of the Trinity Peninsula Group, northern Graham Land, Antarctic Peninsula: a preliminary survey. In: McKenzie, Garry D., (ed.) Gondwana Six: Structure, Tectonics, and Geophysics. Wahington, D.C., American Geophysical Union, 199-207. (Geophysical monograph, 40). Publication - Book Section PeerReviewed 1987 ftnerc https://doi.org/10.1029/GM040p0199 2023-02-04T19:48:08Z Sandstone detrital modes for a representative sample of the Trinity Peninsula Group in northern Graham Land are described and assessed. Whereas the volumetrically dominant quartz and feldspar were derived principally from erosion of a plutonic and high‐rank metamorphic terrane, the lithic population was derived mainly from a volcanic cover. The data clearly indicate the presence of two major sandstone suites (petro‐facies I and II) with distinctive and probably separate provenances. Further scope for subdivision is limited by the small sample set, but four petrofacies (Ia, Ib, IIa, and IIb) may be present, three of which correspond with previously described lithostratigraphical units (Legoupil, Hope Bay, and View Point formations). The sample distribution and detrital modes enable approximate geographical limits to be assigned to each petrofacies for the first time, although the nature of the boundaries (stratigraphical or structural) is unknown. Petrofacies II could have been derived from an active magmatic arc and deposited in a forearc basin (sensu lato) or series of basins at a major consuming margin. Petrofacies I is a much more quartzose suite, although otherwise petrographically very similar to petrofacies II. Its depositional setting is ambiguous on the basis of the data presently available, and deposition can only be said to have occurred at either an active or a passive continental margin. Finally, there is the possibility that strike‐slip faulting has structurally shuffled the Trinity Peninsula Group, causing the pronounced age and compositional contrasts observed. Book Part Antarc* Antarctic Antarctic Peninsula Graham Land Natural Environment Research Council: NERC Open Research Archive Antarctic Antarctic Peninsula Graham Land ENVELOPE(-63.500,-63.500,-66.000,-66.000) Hope Bay ENVELOPE(-57.038,-57.038,-63.403,-63.403) Trinity Peninsula ENVELOPE(-58.000,-58.000,-63.500,-63.500) Legoupil ENVELOPE(-57.885,-57.885,-63.315,-63.315) 199 207 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
Sandstone detrital modes for a representative sample of the Trinity Peninsula Group in northern Graham Land are described and assessed. Whereas the volumetrically dominant quartz and feldspar were derived principally from erosion of a plutonic and high‐rank metamorphic terrane, the lithic population was derived mainly from a volcanic cover. The data clearly indicate the presence of two major sandstone suites (petro‐facies I and II) with distinctive and probably separate provenances. Further scope for subdivision is limited by the small sample set, but four petrofacies (Ia, Ib, IIa, and IIb) may be present, three of which correspond with previously described lithostratigraphical units (Legoupil, Hope Bay, and View Point formations). The sample distribution and detrital modes enable approximate geographical limits to be assigned to each petrofacies for the first time, although the nature of the boundaries (stratigraphical or structural) is unknown. Petrofacies II could have been derived from an active magmatic arc and deposited in a forearc basin (sensu lato) or series of basins at a major consuming margin. Petrofacies I is a much more quartzose suite, although otherwise petrographically very similar to petrofacies II. Its depositional setting is ambiguous on the basis of the data presently available, and deposition can only be said to have occurred at either an active or a passive continental margin. Finally, there is the possibility that strike‐slip faulting has structurally shuffled the Trinity Peninsula Group, causing the pronounced age and compositional contrasts observed. |
author2 |
McKenzie, Garry D. |
format |
Book Part |
author |
Smellie, John L. |
spellingShingle |
Smellie, John L. Sandstone detrital modes and basinal setting of the Trinity Peninsula Group, northern Graham Land, Antarctic Peninsula: a preliminary survey |
author_facet |
Smellie, John L. |
author_sort |
Smellie, John L. |
title |
Sandstone detrital modes and basinal setting of the Trinity Peninsula Group, northern Graham Land, Antarctic Peninsula: a preliminary survey |
title_short |
Sandstone detrital modes and basinal setting of the Trinity Peninsula Group, northern Graham Land, Antarctic Peninsula: a preliminary survey |
title_full |
Sandstone detrital modes and basinal setting of the Trinity Peninsula Group, northern Graham Land, Antarctic Peninsula: a preliminary survey |
title_fullStr |
Sandstone detrital modes and basinal setting of the Trinity Peninsula Group, northern Graham Land, Antarctic Peninsula: a preliminary survey |
title_full_unstemmed |
Sandstone detrital modes and basinal setting of the Trinity Peninsula Group, northern Graham Land, Antarctic Peninsula: a preliminary survey |
title_sort |
sandstone detrital modes and basinal setting of the trinity peninsula group, northern graham land, antarctic peninsula: a preliminary survey |
publisher |
American Geophysical Union |
publishDate |
1987 |
url |
http://nora.nerc.ac.uk/id/eprint/522975/ https://doi.org/10.1029/GM040p0199 |
long_lat |
ENVELOPE(-63.500,-63.500,-66.000,-66.000) ENVELOPE(-57.038,-57.038,-63.403,-63.403) ENVELOPE(-58.000,-58.000,-63.500,-63.500) ENVELOPE(-57.885,-57.885,-63.315,-63.315) |
geographic |
Antarctic Antarctic Peninsula Graham Land Hope Bay Trinity Peninsula Legoupil |
geographic_facet |
Antarctic Antarctic Peninsula Graham Land Hope Bay Trinity Peninsula Legoupil |
genre |
Antarc* Antarctic Antarctic Peninsula Graham Land |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Graham Land |
op_relation |
Smellie, John L. 1987 Sandstone detrital modes and basinal setting of the Trinity Peninsula Group, northern Graham Land, Antarctic Peninsula: a preliminary survey. In: McKenzie, Garry D., (ed.) Gondwana Six: Structure, Tectonics, and Geophysics. Wahington, D.C., American Geophysical Union, 199-207. (Geophysical monograph, 40). |
op_doi |
https://doi.org/10.1029/GM040p0199 |
container_start_page |
199 |
op_container_end_page |
207 |
_version_ |
1766154601658056704 |