Results 21 to 30 of about 14,263 (225)

Topographic Maps of Mount Etna’s Summit Craters, updated to December 2015

open access: yesJournal of Maps, 2017
New maps of the summit of Mount Etna volcano (1:5000–1:4000), derived from helicopter photogrammetry, thermal images and terrestrial laser scanner survey, are here presented.
Marco Neri   +7 more
doaj   +1 more source

Stability of an abandoned siderite mine: A case study in northern Spain

open access: yesOpen Geosciences, 2021
Bodovalle is an iron carbonate mine located in Gallarta (near Bilbao, northern Spain), which is currently in the closure stage. The deposit was first exploited as an open-pit mine and later as an underground mine.
Trigueros Emilio   +3 more
doaj   +1 more source

Simulation and Experimental Study of Laser Processing NdFeB Microarray Structure

open access: yesMicromachines, 2023
NdFeB materials are widely used in the manufacturing of micro-linear motor sliders due to their excellent permanent magnetic properties. However, there are many challenges in processing the slider with micro-structures on the surface, such as complicated
Yong Zhao   +10 more
doaj   +1 more source

Seismic Reflection Data Reveal the 3D Subsurface Structure of Pit Craters

open access: yesJournal of Geophysical Research: Planets, 2021
AbstractPit craters are quasi‐circular depressions observed on rocky and icy planetary bodies, as well as numerous asteroids. Pit craters are thought to form by overburden collapse into a subsurface cavity or volumetrically depleted zone. Importantly, the surface size and distribution of pit craters may provide an important record of otherwise ...
Craig Magee   +3 more
openaire   +1 more source

Research on Temporal and Spatial Distribution Characteristics of Microseismic Events of Slip-Type Rockburst

open access: yesShock and Vibration, 2022
Based on the microseismic monitoring data of underground cavern of Shuangjiangkou Hydropower Station, the internal relationship between rockburst and microseismic events is analyzed and the occurrence mechanism of slip-type rockburst in underground ...
Kun Xu   +7 more
doaj   +1 more source

Crater formation and erosional truncation of Arkhangelskaya kimberlite pipe (Russia)

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
The Late Devonian kimberlite pipes Arkhangelskaya, Pionerskaya, named after Grib, as well as a number of other pipes, have full sections of crater tufogenic and terrigenous deposits in the Zimneberezhny diamondiferous region, the thickness of which is ...
A. V. Bolonin   +2 more
doaj   +1 more source

Classification of lava lakes based on their heat and SO2 emission: Implications for their formation and feeding processes

open access: yesFrontiers in Earth Science, 2023
Lava lakes are a fascinating but somewhat rare form of volcanic activity. Lava lakes are large free surfaces of hot lava that discharge continuously, and almost quietly, heat and volcanic gases into the atmosphere.
Robin Campion, Diego Coppola
doaj   +1 more source

Revalidation of Acanthinozodium Denis, 1966 with description of three new species and discovery of a remarkable male palpal character (Araneae, Zodariidae)

open access: yesEuropean Journal of Taxonomy, 2015
The genus name Acanthinozodium Denis, 1966 is considered available and valid, with A. spinulosum Denis, 1966 as its type species. The genus is characterized by the presence of ventral rows of long setae on the femora, large anterior median eyes and a ...
Rudy Jocqué, Arnaud Henrard
doaj   +1 more source

Experiments and Fluent–Engineering Discrete Element Method-Based Numerical Analysis of Block Motion in Underwater Rock-Plug Blasting

open access: yesApplied Sciences, 2022
Underwater rock-plug blasting is a special blasting technique for excavating underwater inlets. In the process of rock-plug blasting excavation, the blasting-block movement from the difference in water pressure inside and outside the tunnel is one of the
Liang Wu   +3 more
doaj   +1 more source

Repeated UAV Observations and Digital Modeling for Surface Change Detection in Ring Structure Crater Margin in Plateau

open access: yesDrones, 2023
As UAV technology has been leaping forward, small consumer-grade UAVs equipped with optical sensors are capable of easily acquiring high-resolution images, which show bright prospects in a wide variety of terrains and different fields.
Weidong Luo   +7 more
doaj   +1 more source

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