Results 21 to 30 of about 2,061 (160)

Identification of a Buried Late Cenozoic Maar-Diatreme Structure (North Moravia, Czech Republic)

open access: yesGeologica Carpathica, 2015
The maar-diatreme volcanic structure in the vicinity of the village of Lomnice near the town of Bruntál (North Moravia, Czech Republic) has been investigated using a set of geophysical methods including ground magnetometry, gravimetry and electrical ...
Šešulka Vojtěch   +3 more
doaj   +1 more source

Modelling the seismic response of the Mýtina maar volcanic structure

open access: yesEarth, Planets and Space, 2023
In this study, we determine the properties of the maar volcanic structure using ambient vibration analysis. We performed several ambient vibrations surveys at Mýtina maar (West-Bohemia, Czechia) to map amplification by site-to-reference spectral ratios ...
Martin Labuta, Ivo Oprsal, Jan Burjánek
doaj   +1 more source

Internal vs. external forcing in shallow marine diatreme formation: a case study from the Iblean Mountains (SE-Siciliy, Central Mediterranean) [PDF]

open access: yes, 2009
A model of diatreme evolution in a shallow marine setting is based on a multi-disciplinary analysis of diatremes in the Iblean Mountains (Sicily). The approach includes stratigraphic, volcanological, structural, petrologic and compositional data.
Schmincke, Hans-Ulrich, Suiting, Ines
core   +1 more source

Experimental craters formed by single and multiple buried explosions and implications for volcanic craters with emphasis on maars

open access: yesGeophysical Research Letters, 2012
Craters at many volcanoes, including most maars, are formed by multiple subsurface explosions. Experiments compared the crater formed by a single large, buried explosion, with craters formed by multiple explosions with the same cumulative energy ...
Greg A. Valentine   +6 more
doaj   +1 more source

Provenance study of detrital garnets and rutiles from basaltic pyroclastic rocks of Southern Slovakia (Western Carpathians)

open access: yesGeologica Carpathica, 2018
Detrital garnets and rutiles have been recovered from basaltic pyroclastic rocks in the northern part of the Pannonian Basin and characterized using electron probe microanalysis and imaging.
Nemec Ondrej, Huraiová Monika
doaj   +1 more source

Updates to Concepts on Phreatomagmatic Maar-Diatremes and Their Pyroclastic Deposits

open access: yesFrontiers in Earth Science, 2017
Recent work is changing our understanding of phreatomagmatic maar-diatreme eruptions and resulting deposits. In previous models, explosions were often inferred to take place only at the base of a diatreme, with progressive downward migration due to a ...
Greg A. Valentine   +4 more
doaj   +1 more source

Identifying and Comparing the Exploration Criteria at Sari Gunay Gold, Dalli Copper-Gold and Zarshuran Gold Deposits in Zagros Orogen

open access: yesJournal of Economic Geology, 2023
There are important deposits such as Sari Gunay epithermal gold, Dalli porphyry copper-gold, and Zarshuran Carlin deposits with a few common exploration features in the Zagros metallogenic province of Iran. This study used geological maps, remote sensing,
Pouya Asadi Haroni   +3 more
doaj   +1 more source

Karakteristik Alterasi dan Mineralisasi Hidrotermal Daerah Hulawa, Gorontalo, Indonesia

open access: yesJambura Geoscience Review, 2020
Gold is one of the precious metals with high economic value, so the exploration process becomes an important stage to find new resources so that gold production remains optimal.
Umar Zulkarnain Bakkar   +3 more
doaj   +1 more source

Ages of the Pliocene-Pleistocene Alexandra and Ngatutura Volcanics, western North Island, New Zealand, and some geological implications [PDF]

open access: yes, 1989
The Alexandra and Ngatutura Volcanics are the two southernmost of the Pliocene-Quaternary volcanic fields of western and northern North Island, New Zealand, northwest of Taupo Volcanic Zone TVZ.
Briggs, Roger M.   +3 more
core   +2 more sources

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