Chemical and isotope composition of rocks from the Omgon Range, Western Kamchatka coastal area
Hypabyssal rocks of the Omgon Range, Western Kamchatka that intrude Upper Albian-Lower Campanian deposits of the Eurasian continental margin belong to three coeval (62.5-63.0 Ma) associations: (1) ilmenite gabbro-dolerites, (2) titanomagnetite gabbro-dolerites and quartz microdiorites, and (3) porph...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.744377 2023-05-15T16:58:38+02:00 Chemical and isotope composition of rocks from the Omgon Range, Western Kamchatka coastal area Ledneva, G V Nosova, A A Soloviev, A V MEDIAN LATITUDE: 58.007530 * MEDIAN LONGITUDE: 157.742058 * SOUTH-BOUND LATITUDE: 57.999600 * WEST-BOUND LONGITUDE: 157.677400 * NORTH-BOUND LATITUDE: 58.016300 * EAST-BOUND LONGITUDE: 157.759200 2006-08-13 application/zip, 9 datasets https://doi.pangaea.de/10.1594/PANGAEA.744377 https://doi.org/10.1594/PANGAEA.744377 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.744377 https://doi.org/10.1594/PANGAEA.744377 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Ledneva, G V; Nosova, A A; Soloviev, A V (2006): Calc-alkaline magmatism of the Omgon Range: Evidence for Early Paleogene extension in the Western Kamchatka segment of the Eurasian continental margin. Petrology, 14(2), 154-186, https://doi.org/10.1134/S0869591106020020 Archive of Ocean Data ARCOD Kamchatka Peninsula O-27 O-28(4) O-28(6) O-29 O-29(1) O-29(2) O-29(3) O-29(4) O-31(1) O-32 O-33 O-34 O-38 O-40 O-43 O-50 O-56 Dataset 2006 ftpangaea https://doi.org/10.1594/PANGAEA.744377 https://doi.org/10.1134/S0869591106020020 2023-01-20T07:31:52Z Hypabyssal rocks of the Omgon Range, Western Kamchatka that intrude Upper Albian-Lower Campanian deposits of the Eurasian continental margin belong to three coeval (62.5-63.0 Ma) associations: (1) ilmenite gabbro-dolerites, (2) titanomagnetite gabbro-dolerites and quartz microdiorites, and (3) porphyritic biotite granites and granite-aplites. Early Paleocene age of ilmenite gabbro-dolerites and biotite granites was confirmed by zircon and apatite fission-track dating. Ilmenite and titanomagnetite gabbro-dolerites were produced by multilevel fractional crystallization of basaltic melts with, respectively, moderate and high Fe-Ti contents and contamination of these melts with rhyolitic melts of different compositions. Moderate- and high-Fe-Ti basaltic melts were derived from mantle spinel peridotite variably depleted and metasomatized by slab-derived fluid prior to melting. The melts were generated at variable depths and different degrees of melting. Biotite granites and granite aplites were produced by combined fractional crystallization of a crustal rhyolitic melt and its contamination with terrigenous rocks of the Omgon Group. The rhyolitic melts were likely derived from metabasaltic rocks of suprasubduction nature. Early Paleocene hypabyssal rocks of the Omgon Range were demonstrated to have been formed in an extensional environment, which dominated in the margin of the Eurasian continent from Late Cretaceous throughout Early Paleocene. Extension in the Western Kamchatka segment preceded the origin of the Western Koryakian-Kamchatka (Kinkil') continental-margin volcanic belt in Eocene time. This research was conducted based on original geological, mineralogical, geochemical, and isotopic (Rb-Sr) data obtained by the authors. Dataset Kamchatka Kamchatka Peninsula PANGAEA - Data Publisher for Earth & Environmental Science Kamchatka Peninsula ENVELOPE(160.000,160.000,56.000,56.000) Kinkil’ ENVELOPE(160.339,160.339,59.332,59.332) ENVELOPE(157.677400,157.759200,58.016300,57.999600) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Archive of Ocean Data ARCOD Kamchatka Peninsula O-27 O-28(4) O-28(6) O-29 O-29(1) O-29(2) O-29(3) O-29(4) O-31(1) O-32 O-33 O-34 O-38 O-40 O-43 O-50 O-56 |
spellingShingle |
Archive of Ocean Data ARCOD Kamchatka Peninsula O-27 O-28(4) O-28(6) O-29 O-29(1) O-29(2) O-29(3) O-29(4) O-31(1) O-32 O-33 O-34 O-38 O-40 O-43 O-50 O-56 Ledneva, G V Nosova, A A Soloviev, A V Chemical and isotope composition of rocks from the Omgon Range, Western Kamchatka coastal area |
topic_facet |
Archive of Ocean Data ARCOD Kamchatka Peninsula O-27 O-28(4) O-28(6) O-29 O-29(1) O-29(2) O-29(3) O-29(4) O-31(1) O-32 O-33 O-34 O-38 O-40 O-43 O-50 O-56 |
description |
Hypabyssal rocks of the Omgon Range, Western Kamchatka that intrude Upper Albian-Lower Campanian deposits of the Eurasian continental margin belong to three coeval (62.5-63.0 Ma) associations: (1) ilmenite gabbro-dolerites, (2) titanomagnetite gabbro-dolerites and quartz microdiorites, and (3) porphyritic biotite granites and granite-aplites. Early Paleocene age of ilmenite gabbro-dolerites and biotite granites was confirmed by zircon and apatite fission-track dating. Ilmenite and titanomagnetite gabbro-dolerites were produced by multilevel fractional crystallization of basaltic melts with, respectively, moderate and high Fe-Ti contents and contamination of these melts with rhyolitic melts of different compositions. Moderate- and high-Fe-Ti basaltic melts were derived from mantle spinel peridotite variably depleted and metasomatized by slab-derived fluid prior to melting. The melts were generated at variable depths and different degrees of melting. Biotite granites and granite aplites were produced by combined fractional crystallization of a crustal rhyolitic melt and its contamination with terrigenous rocks of the Omgon Group. The rhyolitic melts were likely derived from metabasaltic rocks of suprasubduction nature. Early Paleocene hypabyssal rocks of the Omgon Range were demonstrated to have been formed in an extensional environment, which dominated in the margin of the Eurasian continent from Late Cretaceous throughout Early Paleocene. Extension in the Western Kamchatka segment preceded the origin of the Western Koryakian-Kamchatka (Kinkil') continental-margin volcanic belt in Eocene time. This research was conducted based on original geological, mineralogical, geochemical, and isotopic (Rb-Sr) data obtained by the authors. |
format |
Dataset |
author |
Ledneva, G V Nosova, A A Soloviev, A V |
author_facet |
Ledneva, G V Nosova, A A Soloviev, A V |
author_sort |
Ledneva, G V |
title |
Chemical and isotope composition of rocks from the Omgon Range, Western Kamchatka coastal area |
title_short |
Chemical and isotope composition of rocks from the Omgon Range, Western Kamchatka coastal area |
title_full |
Chemical and isotope composition of rocks from the Omgon Range, Western Kamchatka coastal area |
title_fullStr |
Chemical and isotope composition of rocks from the Omgon Range, Western Kamchatka coastal area |
title_full_unstemmed |
Chemical and isotope composition of rocks from the Omgon Range, Western Kamchatka coastal area |
title_sort |
chemical and isotope composition of rocks from the omgon range, western kamchatka coastal area |
publisher |
PANGAEA |
publishDate |
2006 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.744377 https://doi.org/10.1594/PANGAEA.744377 |
op_coverage |
MEDIAN LATITUDE: 58.007530 * MEDIAN LONGITUDE: 157.742058 * SOUTH-BOUND LATITUDE: 57.999600 * WEST-BOUND LONGITUDE: 157.677400 * NORTH-BOUND LATITUDE: 58.016300 * EAST-BOUND LONGITUDE: 157.759200 |
long_lat |
ENVELOPE(160.000,160.000,56.000,56.000) ENVELOPE(160.339,160.339,59.332,59.332) ENVELOPE(157.677400,157.759200,58.016300,57.999600) |
geographic |
Kamchatka Peninsula Kinkil’ |
geographic_facet |
Kamchatka Peninsula Kinkil’ |
genre |
Kamchatka Kamchatka Peninsula |
genre_facet |
Kamchatka Kamchatka Peninsula |
op_source |
Supplement to: Ledneva, G V; Nosova, A A; Soloviev, A V (2006): Calc-alkaline magmatism of the Omgon Range: Evidence for Early Paleogene extension in the Western Kamchatka segment of the Eurasian continental margin. Petrology, 14(2), 154-186, https://doi.org/10.1134/S0869591106020020 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.744377 https://doi.org/10.1594/PANGAEA.744377 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.744377 https://doi.org/10.1134/S0869591106020020 |
_version_ |
1766050693771165696 |