Results 91 to 100 of about 3,716 (202)

Tectonic controls on the transition from homogeneous crystal-rich to zoned crystal-poor ignimbrites

Communications Earth & Environment
Silicic calderas exhibit cyclic magmatic progression, with some systems transitioning from homogeneous crystal-rich to subsequent zoned crystal-poor caldera-forming eruptions—yet mechanisms governing this shift remain elusive.
Tian-Yu Lu, Zhen-Yu He, Olivier Bachmann, Reiner Klemd, Li-Li Yan, Xi-Sheng Xu   +5 more
doaj   +1 more source

Age of the magma chamber and its physicochemical state under Elbrus Greater Caucasus, Russia using zircon petrochronology and modeling insights. [PDF]

Sci Rep, 2023
Bindeman IN, Melnik OE, Guillong M, Utkin IS, Wotzlaw JF, Schmitt AK, Stern RA.   +6 more
europepmc   +1 more source

A Systematic Comparison of the Anisotropy of Magnetic Susceptibility (AMS) and Anisotropy of Remanence (ARM) Fabrics of Ignimbrites: Examples from the Quaternary Bandelier Tuff, Jemez Mountains, New Mexico and Miocene Ignimbrites near Gold Point, Nevada

, 2017
Anisotropy of magnetic susceptibility (AMS) has been widely used to define petrofabrics in silicic, elevated-temperature pyroclastic deposits (i.e., ignimbrites) and these fabrics have been successfully utilized to infer pyroclastic emplacement, or ...
Lycka, Ranyah
core   +2 more sources

Porosity and Pore-Network Controls on Elastic Properties and Permeability in Porous Ignimbrites

Applied Sciences
In porous ignimbrites, porosity defines the first-order control on elastic trend, but rocks with similar porosity can still behave differently because their pore networks are arranged differently.
Hugo Sereno, Antonio Pola
doaj   +1 more source

Ignimbrites Related to Neogene Volcanism in the Southeast of the Iberian Peninsula: An Experimental Study to Establish Their Pozzolanic Character. [PDF]

Materials (Basel), 2023
Martín DA, Costafreda JL, Presa L, Crespo E, Parra JL, Astudillo B, Sanjuán MÁ.   +6 more
europepmc   +1 more source

On the terms « ignimbrite » and « ignimbritic deposits » [PDF]

Bulletin Volcanologique, 1966
openaire   +1 more source

Paleointensity estimates from ignimbrites: An evaluation of the Bishop Tuff

, 2010
Ash flow tuffs, or ignimbrites, typically contain fine-grained magnetite, spanning the superparamagnetic to single-domain size range that should be suitable for estimating geomagnetic field intensity.
Yu, Yongjae, Gee, Jeffrey S., Bowles, Julie A.   +2 more
core  

Ignimbrites of the Pliocene Bagaces Formation near Cañas (Guanacaste, Costa Rica)

, 2007
By this study, four units within the so far mostly undivided Bagaces Formation - a major ignimbrite unit of the Plio- to Pleistocene magmatic succession in northern Costa Rica - were identified and their ignimbrite sequences stratigraphically ...
Semm, Wolf, Alvarado, Guillermo E.
core   +1 more source

Geology of the boundary between the Sierra Madre Occidental and the Trans-Mexican Volcanic Belt in the Guadalajara region, western Mexico

Revista Mexicana de Ciencias Geológicas, 2018
To investigate the time-space relationship between the Sierra Madre Occidental (SMO) and the Trans-Mexican Volcanic Belt (TMVB), as well as the early volcanic activity of the TMVB, a field study was carried out in the region north of Guadalajara City ...
Andrea Rossotti, Luca Ferrari, Margarita López-Martínez, José Rosas-Elguera   +3 more
doaj  

Rapid caldera subsidence and fluctuating eruption dynamics: the lithostratigraphy and structure of the Loch Bà Caldera, Isle of Mull, NW Scotland

Volcanica
Caldera-forming eruptions represent extremely hazardous events. The Loch Bà Caldera on the Isle of Mull, NW Scotland, preserves an ~120 m thick sequence of Palaeogene silicic pyroclastic rocks and collapse breccias.
Peter Nicholls, David Brown, Ross Dymock
doaj   +1 more source