Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2018 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : S1-06
Conference information

Host: Japan Association of Mineralogical Sciences

S1: Igneous processes and fluids
Ash petrology on non-juvenile fragments in pyroclastic deposits: an example from Azuma volcano, Fukushima, North-eastern Japan
*Takumi Imura, Tsukasa Ohba, Kenta Horikoshi
Author information
Keywords: hydrothermally altered minerals, hydrothermal alteration, phreatic eruption
CONFERENCE PROCEEDINGS FREE ACCESS

Details
Download PDF (243K)
Download citation RIS

(compatible with EndNote, Reference Manager, ProCite, RefWorks)

BIB TEX

(compatible with BibDesk, LaTeX)

Text
How to download citation
Contact us
Abstract
This study petrologically investigated non-juvenile ash grains in pyroclastic deposits at Azuma volcano. By bulk XRD analysis, the samples before Az-OA shows the clear X-ray peaks of smectite and kaolin, while samples after Az-OA showed the strong X-ray peaks of plagioclase, pyroxene, and amphibole. Samples of Az-OA are abundant in acidic-altered ash, also contains neutral-altered grains Whereas, the Az-P7 sample is rich in unaltered ash of extremely high crystalline andesite.
Content from these authors
© 2018 Japan Association of Mineralogical Sciences
Previous article Next article
Favorites & Alerts

Recently viewed articles
Predecessor

Abstracts for Annual Meeting of the Mineralogical Society of Japan

Abstracts of Papers Presented at the Annual Meeting of The Japanese Association of Mineralogists, Petrologists and Economic Geologists

Share this page
feedback
 Top