Results 11 to 20 of about 5,355 (120)

Geological and chronological characteristics of the Baiyin'gaolao Formation in Gaoyaowula, Inner Mongolia

open access: yesDizhi lixue xuebao, 2021
Based on a regional geological survey at a scale of 1:50000, it reveals that the volcanic rocks from the Baiyin'gaolao Formation of Gaoyaowula in Inner Mongolia could be divided into three lithologic segments by the triple mapping method of "volcanic ...
DONG Peipei   +5 more
doaj   +1 more source

Observing eruptions of gas-rich compressible magmas from space

open access: yesNature Communications, 2016
Satellite observations are an important tool in volcano monitoring, but observations such as ground deformation and gas emissions are treated independently. Here, the authors present a model coupling them through their link to magma volatile contents and
Brendan McCormick Kilbride   +2 more
doaj   +1 more source

Biohermal structures exploration of the Pre Upper Permian sedimentary rocks of the northern part of the Buzachi Peninsula and the neighbouring shelf area of the Caspian Sea [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2021
A detailed lithological and stratigraphical analysis of poorly studied Pre Upper Permian sedimentary section uncovered by deep wells on the Buzachi Peninsula is carried out. The characteristic lithological strata are distinguished.
Popkov V.I., Popkov I.V.
doaj   +1 more source

A subduction and mantle plume origin for Samoan volcanism

open access: yesScientific Reports, 2018
The origin of Samoan volcanism in the southwest Pacific remains enigmatic. Whether mantle melting is solely caused by a mantle plume is questionable because some volcanism, here referred to as non-hotspot volcanism, defies the plume model and its linear ...
Vincent Strak, Wouter P. Schellart
doaj   +1 more source

Impacts of Volcanic Emissions on the Global Biogeochemical Mercury Cycle: Insights From Satellite Observations and Chemical Transport Modeling

open access: yesGeophysical Research Letters, 2023
Volcanism is the largest natural source of mercury (Hg) to the biosphere. However, past Hg emission estimates have varied by three orders of magnitude. Here, we present an updated central estimate and interquartile range (232 Mg a−1; IQR: 170–336 Mg a−1)
Benjamin M. Geyman   +3 more
doaj   +1 more source

Medieval Irish chronicles reveal persistent volcanic forcing of severe winter cold events, 431–1649 CE

open access: yesEnvironmental Research Letters, 2013
Explosive volcanism resulting in stratospheric injection of sulfate aerosol is a major driver of regional to global climatic variability on interannual and longer timescales. However, much of our knowledge of the climatic impact of volcanism derives from
Francis Ludlow   +9 more
doaj   +1 more source

Khanneshin - the Afghan carbonatite volcano, discovered in the office

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2017
The pétrographie and mineralogical laboratory study of the rock samples and the analysis of the geological setting in the sites of their collection (South Afghanistan) allowed suggesting the presence of the carbonatite volcano there.
B. Ya. Vikhter
doaj   +1 more source

Volcanism of the early formation stage of Iturup Island (Great Kurile Chain)

open access: yesВестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2021
The article presents new petrogeochemical data on the Middle Miocene-Pliocene volcanic rocks from central part of Iturup Island (Great Kurile Chain). It is shown that volcanism of the Middle Miocene-Early Pliocene age in the central part of the Iturup ...
Федоров П.И.   +3 more
doaj   +1 more source

Transient slab flattening beneath Colombia

open access: yesGeophysical Research Letters, 2017
Subduction of the Nazca and Caribbean Plates beneath northwestern Colombia is seen in two distinct Wadati Benioff Zones, one associated with a flat slab to the north and one associated with normal subduction south of 5.5°N.
L. S. Wagner   +5 more
doaj   +1 more source

The Salittu Formation in southwestern Finland, part I: Structure, age and stratigraphy [PDF]

open access: yesBulletin of the Geological Society of Finland, 2016
Because of the relatively low metamorphic grade, low strain and well-preserved early structures in volcanic and volcaniclastic rocks, the Orijärvi triangle (in the center of the larger Orijärvi area) is one of the few locations in the Svecofennian orogen
M. Nironen, I. Mänttäri, M. Väisänen
doaj   +1 more source

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