Results 11 to 20 of about 3,716 (202)

Geochronology and geochemistry data for the Elbrus, Tyrnyauz, and Chegem magmatic centers, Greater Caucasus, Russia [PDF]

open access: yesData in Brief, 2021
The dataset presented here is associated with the article “Young Silicic Magmatism of the Greater Caucasus, Russia with implication for its delamination origin based on zircon petrochronology and thermomechanical modeling” [1]. We present detailed sample
I.N. Bindeman   +5 more
doaj   +2 more sources

Revised Minoan eruption volume as benchmark for large volcanic eruptions [PDF]

open access: yesNature Communications, 2023
Despite their global societal importance, the volumes of large-scale volcanic eruptions remain poorly constrained. Here, we integrate seismic reflection and P-wave tomography datasets with computed tomography-derived sedimentological analyses to estimate
Jens Karstens   +14 more
doaj   +2 more sources

Permian Large Igneous Provinces and Their Paleoenvironmental Effects

open access: yesGeophysical Monograph Series, Page 417-434., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jun Chen, Yi‐Gang Xu
wiley  

+7 more sources

The ignimbrites of Terceira, Azores [PDF]

open access: yes, 1982
On the oceanic islands of the Atlantic ignimbrites are known to occur on Iceland, Gran Canaria, Tenerife and on two of the Azores islands, Terceira and São Miguel. Ignimbrite may form a larger proportion of the total volume of rock on the island of Terceira than it does on any of the other islands, yet the individual eruption volumes are small (≤ 1 km³)
Self, Stephen
openaire   +2 more sources

Correlation of ignimbrites using characteristic remanent magnetization and anisotropy of magnetic susceptibility, Central Andes, Bolivia [PDF]

open access: yes
Large ignimbrite flare-ups provide records of profound crustal modification during batholith formation at depth. The locations of source calderas and volumes and ages of the eruptions must be determined to develop models for the tectonomagmatic processes
de Silva, Shanaka L.   +4 more
core   +6 more sources

Grain-size distribution of volcaniclastic rocks 1: A new technique based on functional stereology [PDF]

open access: yes, 2012
The power of explosive volcanic eruptions is reflected in the grain size distribution and dispersal of their pyroclastic deposits. Grain size also forms part of lithofacies characteristics that are necessary to determine transport and depositional ...
Proussevitch, A.A.   +7 more
core   +1 more source

The origin of a zoned ignimbrite: Insights into the Campanian Ignimbrite magma chamber (Campi Flegrei, Italy) [PDF]

open access: yesEarth and Planetary Science Letters, 2016
Abstract Caldera-forming eruptions, during which large volumes of magma are explosively evacuated into the atmosphere from shallow crustal reservoirs, are one of the most hazardous natural events on Earth. The Campanian Ignimbrite (CI; Campi Flegrei, Italy) represents a classical example of such events, producing a voluminous pyroclastic sequence of ...
Forni, Francesca   +5 more
openaire   +2 more sources

Petrographic investigation of the Precambrian basement rocks of Esh El Mallaha area, North Eastern Desert, Egypt [PDF]

open access: yesAlfarama Journal of Basic & Applied Sciences, 2023
The Esh El-Mallaha mountain range is located in the northwestern segment of the Arabian-Nubian Shield. The area encompassing it is of especial significance owing to its hydrocarbon resources.
Hossam Khamis   +4 more
doaj   +1 more source

Geology of La Reforma caldera complex, Baja California, Mexico

open access: yesJournal of Maps, 2019
A new geological map at 1:50,000 scale of La Reforma Caldera Complex has been produced applying modern survey methodologies to volcanic areas. This map aims to represent a reliable and objective tool to understand the geological evolution of the region ...
L. García Sánchez   +20 more
doaj   +1 more source

Tephrostratigraphy and Magma Evolution Based on Combined Zircon Trace Element and U-Pb Age Data: Fingerprinting Miocene Silicic Pyroclastic Rocks in the Pannonian Basin

open access: yesFrontiers in Earth Science, 2021
We present a novel approach to use zircon as a correlation tool as well as a monitor for magma reservoir processes in silicic volcanic systems. Fingerprinting eruption products based on trace element content and U-Pb dates of zircon offers a promising ...
Réka Lukács   +7 more
doaj   +1 more source

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