Geologic occurrence and recent eruptive materials of the Lautaro Volcano, Chilean Patagonia

Akihisa Motoki; Yuji Orihashi; Jose Antonio Naranjo; Daiji Hirata; Takahiro Hosono; Felipe Dias Cario; Ryo Anma

doi:10.5575/geosoc.109.IX

Akihisa Motoki, Yuji Orihashi, Jose Antonio Naranjo, Daiji Hirata, Takahiro Hosono, Felipe Dias Cario, Ryo Anma

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ジャーナルフリー

2003 年 109 巻 5 号 p. IX-X

DOI https://doi.org/10.5575/geosoc.109.IX

詳細

Published: 2003 Received: 2002/10/20 Available on J-STAGE: 2010/12/14 Accepted: 2003/03/27 Advance online publication: - Revised: -
訂正情報
訂正日: 2010/12/14 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : The Lautaro Volcano, Chilean Patagonia, is situated at 49° 01.4' S, 73° 32.5' W, being the closest volcano to the Chile Triple Junction, in which on-going subduction of active ridge takes place. The volcanoes of the Austral Volcanic Zone are characterised by adakitic composition (Stern and Killian, 1996), and their magma origin is attributed to slab-melting. Such typical ridge subduction volcanism can clarify juvenile continental crust formation process, as a modern analogue of Archaean magmatism.
The access to the Lautaro Volcano, 3, 607 m above the sea level, is extremely difficult because of accidental morphology and unfavourable climate conditions. The volcano edifice stands out from the glacial plateau of 2, 400 m high, so-called South Ice Field, therefore, no research group had got rock samples in enough amount and variety. On February 28, 2002, with help of helicopter, the authors' research group accomplished a successful sampling of eruptive materials of this volcano from deposits of the Lautaro Glacier, first target, and the O'Higgins Glacier, second target.
Right : The Lautaro Volcano, Chilean Patagonia, is situated at 49° 01.4' S, 73° 32.5' W, being the closest volcano to the Chile Triple Junction, in which on-going subduction of active ridge takes place. The volcanoes of the Austral Volcanic Zone are characterised by adakitic composition (Stern and Killian, 1996), and their magma origin is attributed to slab-melting. Such typical ridge subduction volcanism can clarify juvenile continental crust formation process, as a modern analogue of Archaean magmatism.
The access to the Lautaro Volcano, 3, 607 m above the sea level, is extremely difficult because of accidental morphology and unfavourable climate conditions. The volcano edifice stands out from the glacial plateau of 2, 400 m high, so-called South Ice Field, therefore, no research group had got rock samples in enough amount and variety. On February 28, 2002, with help of helicopter, the authors' research group accomplished a successful sampling of eruptive materials of this volcano from deposits of the Lautaro Glacier, first target, and the O'Higgins Glacier, second target.

訂正日: 2010/12/14 訂正理由: - 訂正箇所: PDFファイル訂正内容: -

抄録

The Lautaro Volcano, Chilean Patagonia, is situated at 49° 01.4' S, 73° 32.5' W, being the closest volcano to the Chile Triple Junction, in which on-going subduction of active ridge takes place. The volcanoes of the Austral Volcanic Zone are characterised by adakitic composition (Stern and Killian, 1996), and their magma origin is attributed to slab-melting. Such typical ridge subduction volcanism can clarify juvenile continental crust formation process, as a modern analogue of Archaean magmatism.
The access to the Lautaro Volcano, 3, 607 m above the sea level, is extremely difficult because of accidental morphology and unfavourable climate conditions. The volcano edifice stands out from the glacial plateau of 2, 400 m high, so-called South Ice Field, therefore, no research group had got rock samples in enough amount and variety. On February 28, 2002, with help of helicopter, the authors' research group accomplished a successful sampling of eruptive materials of this volcano from deposits of the Lautaro Glacier, first target, and the O'Higgins Glacier, second target.

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