Late Proterozoic juvenile arc metatonalite and adakitic intrusions in the Sør Rondane Mountains, eastern Dronning Maud Land, Antarctica

Atsushi Kamei, Kenji Horie, Masaaki Owada, Masaki Yuhara, Nobuhiko Nakano, Yasuhito Osanai, Tatsuro Adachi, Yuki Hara, Madoka Terao, Shinjiro Teuchi, Toshiaki Shimura, Kazuhiro Tsukada, Tomokazu Hokada, Chika Iwata, Kazuyuki Shiraishi, Hideo Ishizuka, Yuhei Takahashi

研究成果: ジャーナルへの寄稿記事

21 引用 (Scopus)

抄録

This study is a detailed investigation of the petrology and geochronology of the Late Proterozoic metatonalite in the Sør Rondane Mountains, eastern Dronning Maud Land, Antarctica. Metatonalite is dominant over roughly 100×20km2 area in the southwestern end of the mountain range and is classified into five lithologies: gneissose Bt-Hbl metatonalite, weak gneissose Hbl-Bt metatonalite, Hbl metagabbro, Hbl-Bt tonalitic gneiss, and Bt metatonalite. The gneissose Bt-Hbl metatonalite is the main lithotype widely distributed over this area, which is geochemically categorized as low-K tholeiitic granitoid. Petrological studies suggest that the tholeiitic magma was derived from low-K basalt melting at the crustal depth, and the most plausible tectonic setting is a juvenile oceanic arc. The other four metaplutonic rocks are scattered as stocks or small intrusions in this area. They are geochemically regarded as calc-alkaline adakites related to oceanic slab melting. U-Pb SHRIMP zircon ages of the tholeiitic metatonalite are concentrated at 998-995Ma, whereas the calc-alkaline adakitic rocks are younger and divided between ages 945-920Ma and 772Ma. We believe that the tholeiitic metatonalite was formed first as a juvenile arc component between 998 and 995Ma, followed by adakitic magmatism and oceanic slab melting at 945-920Ma and 772Ma. Magmatism during this stage is not recorded in the western to central Dronning Maud Land. Moreover, the exposure of an adakitic equivalent continues at the farther eastern side of the Sør Rondane Mountains. This suggests that the tectonic framework of the Sør Rondane Mountains, eastern Dronning Maud Land, is different from the western to central Dronning Maud Land.

元の言語英語
ページ(範囲)47-62
ページ数16
ジャーナルPrecambrian Research
234
DOI
出版物ステータス出版済み - 10 1 2012

Fingerprint

Proterozoic
Melting
Tectonics
mountain
melting
Rocks
Geochronology
Petrology
magmatism
slab
Lithology
metagabbro
calc alkaline rock
lithotype
granitoid
tectonic setting
petrology
geochronology
gneiss
lithology

All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology

これを引用

Late Proterozoic juvenile arc metatonalite and adakitic intrusions in the Sør Rondane Mountains, eastern Dronning Maud Land, Antarctica. / Kamei, Atsushi; Horie, Kenji; Owada, Masaaki; Yuhara, Masaki; Nakano, Nobuhiko; Osanai, Yasuhito; Adachi, Tatsuro; Hara, Yuki; Terao, Madoka; Teuchi, Shinjiro; Shimura, Toshiaki; Tsukada, Kazuhiro; Hokada, Tomokazu; Iwata, Chika; Shiraishi, Kazuyuki; Ishizuka, Hideo; Takahashi, Yuhei.

:: Precambrian Research, 巻 234, 01.10.2012, p. 47-62.

研究成果: ジャーナルへの寄稿記事

Kamei, A, Horie, K, Owada, M, Yuhara, M, Nakano, N, Osanai, Y, Adachi, T, Hara, Y, Terao, M, Teuchi, S, Shimura, T, Tsukada, K, Hokada, T, Iwata, C, Shiraishi, K, Ishizuka, H & Takahashi, Y 2012, 'Late Proterozoic juvenile arc metatonalite and adakitic intrusions in the Sør Rondane Mountains, eastern Dronning Maud Land, Antarctica', Precambrian Research, 巻. 234, pp. 47-62. https://doi.org/10.1016/j.precamres.2012.09.026
Kamei, Atsushi ; Horie, Kenji ; Owada, Masaaki ; Yuhara, Masaki ; Nakano, Nobuhiko ; Osanai, Yasuhito ; Adachi, Tatsuro ; Hara, Yuki ; Terao, Madoka ; Teuchi, Shinjiro ; Shimura, Toshiaki ; Tsukada, Kazuhiro ; Hokada, Tomokazu ; Iwata, Chika ; Shiraishi, Kazuyuki ; Ishizuka, Hideo ; Takahashi, Yuhei. / Late Proterozoic juvenile arc metatonalite and adakitic intrusions in the Sør Rondane Mountains, eastern Dronning Maud Land, Antarctica. :: Precambrian Research. 2012 ; 巻 234. pp. 47-62.
@article{9440dc5a633442df94963a88bee1bc18,
title = "Late Proterozoic juvenile arc metatonalite and adakitic intrusions in the S{\o}r Rondane Mountains, eastern Dronning Maud Land, Antarctica",
abstract = "This study is a detailed investigation of the petrology and geochronology of the Late Proterozoic metatonalite in the S{\o}r Rondane Mountains, eastern Dronning Maud Land, Antarctica. Metatonalite is dominant over roughly 100×20km2 area in the southwestern end of the mountain range and is classified into five lithologies: gneissose Bt-Hbl metatonalite, weak gneissose Hbl-Bt metatonalite, Hbl metagabbro, Hbl-Bt tonalitic gneiss, and Bt metatonalite. The gneissose Bt-Hbl metatonalite is the main lithotype widely distributed over this area, which is geochemically categorized as low-K tholeiitic granitoid. Petrological studies suggest that the tholeiitic magma was derived from low-K basalt melting at the crustal depth, and the most plausible tectonic setting is a juvenile oceanic arc. The other four metaplutonic rocks are scattered as stocks or small intrusions in this area. They are geochemically regarded as calc-alkaline adakites related to oceanic slab melting. U-Pb SHRIMP zircon ages of the tholeiitic metatonalite are concentrated at 998-995Ma, whereas the calc-alkaline adakitic rocks are younger and divided between ages 945-920Ma and 772Ma. We believe that the tholeiitic metatonalite was formed first as a juvenile arc component between 998 and 995Ma, followed by adakitic magmatism and oceanic slab melting at 945-920Ma and 772Ma. Magmatism during this stage is not recorded in the western to central Dronning Maud Land. Moreover, the exposure of an adakitic equivalent continues at the farther eastern side of the S{\o}r Rondane Mountains. This suggests that the tectonic framework of the S{\o}r Rondane Mountains, eastern Dronning Maud Land, is different from the western to central Dronning Maud Land.",
author = "Atsushi Kamei and Kenji Horie and Masaaki Owada and Masaki Yuhara and Nobuhiko Nakano and Yasuhito Osanai and Tatsuro Adachi and Yuki Hara and Madoka Terao and Shinjiro Teuchi and Toshiaki Shimura and Kazuhiro Tsukada and Tomokazu Hokada and Chika Iwata and Kazuyuki Shiraishi and Hideo Ishizuka and Yuhei Takahashi",
year = "2012",
month = "10",
day = "1",
doi = "10.1016/j.precamres.2012.09.026",
language = "English",
volume = "234",
pages = "47--62",
journal = "Precambrian Research",
issn = "0301-9268",
publisher = "Elsevier",

}

TY - JOUR

T1 - Late Proterozoic juvenile arc metatonalite and adakitic intrusions in the Sør Rondane Mountains, eastern Dronning Maud Land, Antarctica

AU - Kamei, Atsushi

AU - Horie, Kenji

AU - Owada, Masaaki

AU - Yuhara, Masaki

AU - Nakano, Nobuhiko

AU - Osanai, Yasuhito

AU - Adachi, Tatsuro

AU - Hara, Yuki

AU - Terao, Madoka

AU - Teuchi, Shinjiro

AU - Shimura, Toshiaki

AU - Tsukada, Kazuhiro

AU - Hokada, Tomokazu

AU - Iwata, Chika

AU - Shiraishi, Kazuyuki

AU - Ishizuka, Hideo

AU - Takahashi, Yuhei

PY - 2012/10/1

Y1 - 2012/10/1

N2 - This study is a detailed investigation of the petrology and geochronology of the Late Proterozoic metatonalite in the Sør Rondane Mountains, eastern Dronning Maud Land, Antarctica. Metatonalite is dominant over roughly 100×20km2 area in the southwestern end of the mountain range and is classified into five lithologies: gneissose Bt-Hbl metatonalite, weak gneissose Hbl-Bt metatonalite, Hbl metagabbro, Hbl-Bt tonalitic gneiss, and Bt metatonalite. The gneissose Bt-Hbl metatonalite is the main lithotype widely distributed over this area, which is geochemically categorized as low-K tholeiitic granitoid. Petrological studies suggest that the tholeiitic magma was derived from low-K basalt melting at the crustal depth, and the most plausible tectonic setting is a juvenile oceanic arc. The other four metaplutonic rocks are scattered as stocks or small intrusions in this area. They are geochemically regarded as calc-alkaline adakites related to oceanic slab melting. U-Pb SHRIMP zircon ages of the tholeiitic metatonalite are concentrated at 998-995Ma, whereas the calc-alkaline adakitic rocks are younger and divided between ages 945-920Ma and 772Ma. We believe that the tholeiitic metatonalite was formed first as a juvenile arc component between 998 and 995Ma, followed by adakitic magmatism and oceanic slab melting at 945-920Ma and 772Ma. Magmatism during this stage is not recorded in the western to central Dronning Maud Land. Moreover, the exposure of an adakitic equivalent continues at the farther eastern side of the Sør Rondane Mountains. This suggests that the tectonic framework of the Sør Rondane Mountains, eastern Dronning Maud Land, is different from the western to central Dronning Maud Land.

AB - This study is a detailed investigation of the petrology and geochronology of the Late Proterozoic metatonalite in the Sør Rondane Mountains, eastern Dronning Maud Land, Antarctica. Metatonalite is dominant over roughly 100×20km2 area in the southwestern end of the mountain range and is classified into five lithologies: gneissose Bt-Hbl metatonalite, weak gneissose Hbl-Bt metatonalite, Hbl metagabbro, Hbl-Bt tonalitic gneiss, and Bt metatonalite. The gneissose Bt-Hbl metatonalite is the main lithotype widely distributed over this area, which is geochemically categorized as low-K tholeiitic granitoid. Petrological studies suggest that the tholeiitic magma was derived from low-K basalt melting at the crustal depth, and the most plausible tectonic setting is a juvenile oceanic arc. The other four metaplutonic rocks are scattered as stocks or small intrusions in this area. They are geochemically regarded as calc-alkaline adakites related to oceanic slab melting. U-Pb SHRIMP zircon ages of the tholeiitic metatonalite are concentrated at 998-995Ma, whereas the calc-alkaline adakitic rocks are younger and divided between ages 945-920Ma and 772Ma. We believe that the tholeiitic metatonalite was formed first as a juvenile arc component between 998 and 995Ma, followed by adakitic magmatism and oceanic slab melting at 945-920Ma and 772Ma. Magmatism during this stage is not recorded in the western to central Dronning Maud Land. Moreover, the exposure of an adakitic equivalent continues at the farther eastern side of the Sør Rondane Mountains. This suggests that the tectonic framework of the Sør Rondane Mountains, eastern Dronning Maud Land, is different from the western to central Dronning Maud Land.

UR - http://www.scopus.com/inward/record.url?scp=84882884711&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84882884711&partnerID=8YFLogxK

U2 - 10.1016/j.precamres.2012.09.026

DO - 10.1016/j.precamres.2012.09.026

M3 - Article

AN - SCOPUS:84882884711

VL - 234

SP - 47

EP - 62

JO - Precambrian Research

JF - Precambrian Research

SN - 0301-9268

ER -