Grounded electrical-source airborne transient electromagnetics (GREATEM) survey of Aso Volcano, Japan

Autor:	Akira Jomori, Hideshi Kaieda, Youichi Yuuki, Toru Mogi, Hisatoshi Ito
Rok vydání:	2014
Předmět:	Transient electromagnetics geography geography.geographical_feature_category Electromagnetics 010504 meteorology & atmospheric sciences Lithology Geology Survey result Geophysics 010502 geochemistry & geophysics 01 natural sciences Volcano Impact crater Seismology 0105 earth and related environmental sciences
Zdroj:	Exploration Geophysics. 45:43-48
ISSN:	1834-7533 0812-3985
DOI:	10.1071/eg12074
Popis:	Grounded electrical-source airborne transient electromagnetics (GREATEM), a type of semi-airborne electromagnetics, was used to examine Aso Volcano in south-west Japan, to verify its applicability to surveying deep subsurface resistivity structures. Comparison of the GREATEM resistivity values with those of ground-based transient electromagnetics (TEM) data, repeated GREATEM survey results at the same and different flight heights, and lithologic descriptions indicated that GREATEM can successfully identify underground structures as deep as ~800 m in rugged mountainous areas. An active volcanic region (Naka-Dake crater) was mapped as a low-resistivity zone from the surface to a depth of 100 m. This low-resistivity zone extended to the west-north-west, implying future volcanic activity in this area. Therefore, the GREATEM method is useful for surveying deep structures in large, inaccessible areas, such as volcanic provinces, in a quick, cost-effective way.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a92da0c62277fbfc8464526ec565b59b https://doi.org/10.1071/eg12074 Zobrazit plný text záznamu Plný text ve formátu HTML
Nepřihlášeným uživatelům se plný text nezobrazuje	K zobrazení výsledku je třeba se přihlásit.