Tab. 2: U-Pb ion-microprobe ages from Taymyr peninsula
We present the initial results of a U-Th-Pb zircon ion-microprobe investigation on samples from the Central Belt of Taimyr, in order to constrain its tectono-magmatic evolution. The zircon samples are from a deformed twomica granite (Faddey Massif), deformed metamorphosed gabbroic dike entrained as...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.759565 2023-05-15T18:02:51+02:00 Tab. 2: U-Pb ion-microprobe ages from Taymyr peninsula Pease, Victria Vernikovsky, Valerij MEDIAN LATITUDE: 77.142020 * MEDIAN LONGITUDE: 104.194000 * SOUTH-BOUND LATITUDE: 76.916700 * WEST-BOUND LONGITUDE: 103.180000 * NORTH-BOUND LATITUDE: 77.240000 * EAST-BOUND LONGITUDE: 107.100000 2000-04-17 text/tab-separated-values, 564 data points https://doi.pangaea.de/10.1594/PANGAEA.759565 https://doi.org/10.1594/PANGAEA.759565 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.759565 https://doi.org/10.1594/PANGAEA.759565 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Pease, Victria; Vernikovsky, Valerij (2000): The tectono-magmatic evolution of the Taimyr Peninsula: further constraints from new ion-microprobe data. Polarforschung, 68, 171-178, hdl:10013/epic.29804.d001 - 510 510tay 512 512tay 514 514tay 520 520tay 5562 5562tay Age 206Pb/207Pb Lead-Lead 238U/206Pb Uranium-Lead comment dated dated standard deviation Discordance Geological sample GEOS Lead Lead-206/Uranium-238 error Lead-206/Uranium-238 ratio Lead-207/Lead-206 standard error Lead-207/Lead-206 ratio Optional event label Rock type Sample code/label Taymyr Thorium Thorium/Uranium ratio Uranium Dataset 2000 ftpangaea https://doi.org/10.1594/PANGAEA.759565 2023-01-20T08:52:08Z We present the initial results of a U-Th-Pb zircon ion-microprobe investigation on samples from the Central Belt of Taimyr, in order to constrain its tectono-magmatic evolution. The zircon samples are from a deformed twomica granite (Faddey Massif), deformed metamorphosed gabbroic dike entrained as pods and lenses within metamorphosed tholeiitic basalts of the Kunar-Mod volcanic suite (Klyaz'ma River region), a metamorphosed rhyolite of the same volcanic suite overlying the basic metavolcanic rocks, as well as an undeformed dolerite dike which intrudes the metamorphosed Kunar-Mod basic volcanic rocks. Preliminary results on zircons from the two-mica granite suggest a crystallization age of ~630 Ma for this rock, with inheritance from assimilated crust 840 Ma to 1.1 Ga in age. In the Klyaz'ma River region, zircons from the meta-rhyolite yield a concordant age of -630 Ma. Zircons from the entrained metagabbroic dikes have so far yielded an age of -615 Ma (1 grain), as well as Archean ages (5 grains, concordant at 2.6-2.8 Ga). It seems likely that the Archean grains represent assimilation of older crustal material. Zircons from the post-tectonic dolerite dike have a bimodal age distribution. A well-defined younger age of 281 ±9 Ma is interpreted to represent the crystallization age of the dike, while older, concordant ages of 2.6-2.9 Ga likely represent assimilation of Archean crust (Siberian craton at depth). Several important conclusions can be drawn from the data. (1) The mafic and felsic lithologies of the Kunar-Mod volcanic suite are genetically related and should be the same age. Ages of-630 Ma (meta-rhyolite) and -615 Ma (metagabbroic dikes representing the latest stage of mafic magmatism associated the Kunar-Mod suite) suggest that these lithologies may be the same age, but more data are required to confirm this hypothesis. (2) The 630 Ma two-mica granite is similar in age to the time of high-grade metamorphism, suggesting that syntectonic granite emplacement accompanied obduction of the accretionary ... Dataset Polarforschung Taimyr Taymyr Taymyr Peninsula PANGAEA - Data Publisher for Earth & Environmental Science Kunar ENVELOPE(104.296,104.296,77.666,77.666) Taymyr ENVELOPE(89.987,89.987,68.219,68.219) ENVELOPE(103.180000,107.100000,77.240000,76.916700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
- 510 510tay 512 512tay 514 514tay 520 520tay 5562 5562tay Age 206Pb/207Pb Lead-Lead 238U/206Pb Uranium-Lead comment dated dated standard deviation Discordance Geological sample GEOS Lead Lead-206/Uranium-238 error Lead-206/Uranium-238 ratio Lead-207/Lead-206 standard error Lead-207/Lead-206 ratio Optional event label Rock type Sample code/label Taymyr Thorium Thorium/Uranium ratio Uranium |
spellingShingle |
- 510 510tay 512 512tay 514 514tay 520 520tay 5562 5562tay Age 206Pb/207Pb Lead-Lead 238U/206Pb Uranium-Lead comment dated dated standard deviation Discordance Geological sample GEOS Lead Lead-206/Uranium-238 error Lead-206/Uranium-238 ratio Lead-207/Lead-206 standard error Lead-207/Lead-206 ratio Optional event label Rock type Sample code/label Taymyr Thorium Thorium/Uranium ratio Uranium Pease, Victria Vernikovsky, Valerij Tab. 2: U-Pb ion-microprobe ages from Taymyr peninsula |
topic_facet |
- 510 510tay 512 512tay 514 514tay 520 520tay 5562 5562tay Age 206Pb/207Pb Lead-Lead 238U/206Pb Uranium-Lead comment dated dated standard deviation Discordance Geological sample GEOS Lead Lead-206/Uranium-238 error Lead-206/Uranium-238 ratio Lead-207/Lead-206 standard error Lead-207/Lead-206 ratio Optional event label Rock type Sample code/label Taymyr Thorium Thorium/Uranium ratio Uranium |
description |
We present the initial results of a U-Th-Pb zircon ion-microprobe investigation on samples from the Central Belt of Taimyr, in order to constrain its tectono-magmatic evolution. The zircon samples are from a deformed twomica granite (Faddey Massif), deformed metamorphosed gabbroic dike entrained as pods and lenses within metamorphosed tholeiitic basalts of the Kunar-Mod volcanic suite (Klyaz'ma River region), a metamorphosed rhyolite of the same volcanic suite overlying the basic metavolcanic rocks, as well as an undeformed dolerite dike which intrudes the metamorphosed Kunar-Mod basic volcanic rocks. Preliminary results on zircons from the two-mica granite suggest a crystallization age of ~630 Ma for this rock, with inheritance from assimilated crust 840 Ma to 1.1 Ga in age. In the Klyaz'ma River region, zircons from the meta-rhyolite yield a concordant age of -630 Ma. Zircons from the entrained metagabbroic dikes have so far yielded an age of -615 Ma (1 grain), as well as Archean ages (5 grains, concordant at 2.6-2.8 Ga). It seems likely that the Archean grains represent assimilation of older crustal material. Zircons from the post-tectonic dolerite dike have a bimodal age distribution. A well-defined younger age of 281 ±9 Ma is interpreted to represent the crystallization age of the dike, while older, concordant ages of 2.6-2.9 Ga likely represent assimilation of Archean crust (Siberian craton at depth). Several important conclusions can be drawn from the data. (1) The mafic and felsic lithologies of the Kunar-Mod volcanic suite are genetically related and should be the same age. Ages of-630 Ma (meta-rhyolite) and -615 Ma (metagabbroic dikes representing the latest stage of mafic magmatism associated the Kunar-Mod suite) suggest that these lithologies may be the same age, but more data are required to confirm this hypothesis. (2) The 630 Ma two-mica granite is similar in age to the time of high-grade metamorphism, suggesting that syntectonic granite emplacement accompanied obduction of the accretionary ... |
format |
Dataset |
author |
Pease, Victria Vernikovsky, Valerij |
author_facet |
Pease, Victria Vernikovsky, Valerij |
author_sort |
Pease, Victria |
title |
Tab. 2: U-Pb ion-microprobe ages from Taymyr peninsula |
title_short |
Tab. 2: U-Pb ion-microprobe ages from Taymyr peninsula |
title_full |
Tab. 2: U-Pb ion-microprobe ages from Taymyr peninsula |
title_fullStr |
Tab. 2: U-Pb ion-microprobe ages from Taymyr peninsula |
title_full_unstemmed |
Tab. 2: U-Pb ion-microprobe ages from Taymyr peninsula |
title_sort |
tab. 2: u-pb ion-microprobe ages from taymyr peninsula |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.759565 https://doi.org/10.1594/PANGAEA.759565 |
op_coverage |
MEDIAN LATITUDE: 77.142020 * MEDIAN LONGITUDE: 104.194000 * SOUTH-BOUND LATITUDE: 76.916700 * WEST-BOUND LONGITUDE: 103.180000 * NORTH-BOUND LATITUDE: 77.240000 * EAST-BOUND LONGITUDE: 107.100000 |
long_lat |
ENVELOPE(104.296,104.296,77.666,77.666) ENVELOPE(89.987,89.987,68.219,68.219) ENVELOPE(103.180000,107.100000,77.240000,76.916700) |
geographic |
Kunar Taymyr |
geographic_facet |
Kunar Taymyr |
genre |
Polarforschung Taimyr Taymyr Taymyr Peninsula |
genre_facet |
Polarforschung Taimyr Taymyr Taymyr Peninsula |
op_source |
Supplement to: Pease, Victria; Vernikovsky, Valerij (2000): The tectono-magmatic evolution of the Taimyr Peninsula: further constraints from new ion-microprobe data. Polarforschung, 68, 171-178, hdl:10013/epic.29804.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.759565 https://doi.org/10.1594/PANGAEA.759565 |
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.759565 |
_version_ |
1766173547598708736 |