THE STABILITY FIELD OF AMPHIBOLE FROM THE SØR RONDANE MOUNTAINS, EAST ANTARCTICA : IMPLICATION FOR THE EMPLACEMENT DEPTH OF SYENITE MAGMA

By using the stability field of amphibole in the melting experiments, we attempt to estimate the emplacement depth of amphibole-bearing syenites from the Sør Rondane Mountains. The melting relationships of four syenites and one granite were determined in the temperature range of 650-900℃ under water...

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Bibliographic Details
Main Authors: オオバ タカノブ, シライシ カズユキ, Takanobu OBA, Kazuyuki SHIRAISHI
Format: Report
Language:English
Published: Department of Geoscience, Joetsu University of Education 1995
Subjects:
East Antarctica
Yamato
Sør-Rondane
Sør Rondane Mountains
Antarc*
Antarctica
Online Access:https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2788
http://id.nii.ac.jp/1291/00002788/
https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2788&item_no=1&attribute_id=18&file_no=1
Description
Summary:By using the stability field of amphibole in the melting experiments, we attempt to estimate the emplacement depth of amphibole-bearing syenites from the Sør Rondane Mountains. The melting relationships of four syenites and one granite were determined in the temperature range of 650-900℃ under water pressure of 0.1-0.3GPa and oxygen fugacities of the FMQ buffer. In two syenites and a granite, the maximum pressure stability limit of amphiboles in subliquidus is lower pressure than 0.35GPa. The emplacement depth of the syenites from the S∅r Rondane Mountains is similar to that of syenites from the Yamato Mountains.

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