Adakitic Dacites Formed by Intracrustal Crystal Fractionation of Water-rich Parent Magmas at Nevado de Longaví Volcano (36·2°S; Andean Southern Volcanic Zone, Central Chile) [PDF]
, 2017 The mid-Holocene eruptive products of Nevado de Longaví volcano (36·2°S, Chile) are the only reported occurrence of adakitic volcanic rocks in the Quaternary Andean Southern Volcanic Zone (33-46°S).
Dungan, Michael +4 more
core
Tephrochronology and Eruptive Activity on Hakone Volcano in the Past 50ka.
The Quaternary Research (Daiyonki-Kenkyu), 1999 箱根火山周辺域に分布する箱根火山起源テフラ(降下軽石,火砕流堆積物)と富士火山起源テフラ,および広域テフラの層序関係を確立し,箱根火山中央火口丘の噴火活動史・火山体形成史を明らかにした.中央火口丘期の噴火活動は,新期カルデラ内に先神山(pre-Kamiyama)が形成されることにより始まった(約50ka).先神山の噴火活動は,最初,噴煙柱を形成しながら軽石を噴出していたが,徐々に軽石よりも類質岩片を多く噴出するようになり,最終的には先神山の一部が崩壊した(早川泥流CC2:約37,38ka).先神山崩壊後は,粘性の高い溶岩の大規模な流出に伴って,火砕流(block and ash flow)を頻繁に流下させながら溶岩ドームを形成する噴火様式に変化し,神山を中心とした中央火口丘群が次々と形成された ...
openaire +2 more sources
An investigation of volcanic depressions. Part 1 - Geologic and geophysical features of calderas Progress report [PDF]
Preferred classification of calderas and volcano- tectonic depressions based on relative amounts of lava and proclastic ...
Mc Birney, A. R., Williams, H.
core +1 more source
A detailed record of large explosive eruptions from Japan between ∼120 and 50 ka preserved at Lake Suigetsu [PDF]
We present the findings of a detailed non-visible (cryptotephra) tephra investigation of the Lake Suigetsu (Japan) sedimentary sequence spanning ∼120 to 50 ka.
Albert, Paul G +14 more
core +2 more sources
, 2015 International Ocean Discovery Program (IODP) Hole U1436A (proposed Site IBM-4GT) lies in the western part of the Izu fore-arc basin, ~60 km east of the arc-front volcano Aogashima, ~170 km west of the axis of the Izu-Bonin Trench, and 1.5 km west of ...
and Yang, Y. +31 more
core +2 more sources
A mineralogical study of the proposed paired eucrites Y-792769 and Y-793164 with reference to cratering events on their parent body [PDF]
, 1994 A comparison of the mineralogy of Yamato (Y-) 792769 and Y-793164 has been performed to confirm the proposed pairing of these two specimens and to correlate their common shock-sintered textures with the resetting of their isotopic ages.
Akira Yamaguchi +3 more
core +1 more source
Evolutionary effects of geographic and climatic isolation between Rhododendron tsusiophyllum populations on the Izu Islands and mainland Honshu of Japan. [PDF]
Heredity (Edinb), 2021 Yoichi W +4 more
europepmc +1 more source
Characteristics of drift pumice clasts along the coast of the Japanese Islands: The AT tephra, representative source of drift pumice clasts [PDF]
, 2023 We analyzed the major element composition of volcanic glass shards in drift pumice clasts sampled from the Japanese coast before the 2021 eruption of Fukutoku-Oka-no-Ba (FOB).
Aoki Kaori +3 more
core +1 more source
Crystal Chemistry of Anorthite Megacrysts in Volcanic Rocks from Hakone Volcano, Japan [PDF]
, 2023 Anorthite megacrysts from Tonosawa, Hakone Volcano, Japan, were studied by electron probe microanalyzer, X-ray powder diffractometry, X-ray single-crystal analysis, infrared spectrometry, and inductively coupled plasma analysis.
142486, MATSUI, Tomoaki, 松井, 智彰
core