Results 11 to 20 of about 50,959 (268)

Marcasite at the Permian‐Triassic Transition

open access: yesGeophysical Monograph Series, Page 377-399., 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.
Elena Lounejeva   +7 more
wiley  

+1 more source

Experimental research into the effect of some operation factors and rock properties on the rate of penetration [PDF]

open access: yes, 2020
Purpose. The purpose of this research is to investigate the effect of weight on bit (WOB), rotary speed (RPM), and some rock properties on the rate of penetration (ROP). Methods.
Ali, Mahrous A.M.   +4 more
core   +1 more source

Geochemical features and formation conditions of the cupriferous sandstones of the Orenburg Pre-Urals

open access: yesЛитосфера, 2018
Object. The article describes a new geological and geochemical data for Permian host rocks and copper sandstones (CS) in Orenburg’s Pre-Urals. Methods .
Alexander V. Volkov   +4 more
doaj   +1 more source

The prospects of gold mineralization of the Precambrian complexes of the Subpolar Urals

open access: yesЛитосфера, 2018
Precambrian strata - the most important source of many types of mineral raw materials. Within their boundaries are the largest deposits of iron, gold, chromium, diamonds, platinoids, nickel, copper, polymetals, vanadium and uranium.
Yurii S. Savchuk   +2 more
doaj   +1 more source

Cupriferous basalts of the Northern Urals

open access: yesЛитосфера, 2017
Characteristics and distinctive features of cupriferous basalts in the world are given. Deposits of the Superior Lake in the United States are considered as a reference.
S. Savchuk Yury   +2 more
doaj   +1 more source

The substitution mechanism of Au in In-, Fe- and In-Fe-bearing synthetic crystals of sphalerite, based on the data from EPMA and LA-ICP-MS study

open access: yesЛитосфера, 2019
Research subject. Sphalerite (ZnS) is a widespread mineral that can be found in various depositional environments. During formation, this mineral can accumulate minor and trace impurities, with gold being one of the most valuable component.
D. E. Tonkacheev   +5 more
doaj   +1 more source

PHYSICAL-CHEMICAL FORMATION CONDITIONS OF URANIUM-TITANIUM-METAGEL MINERALIZATION AT THE GOLD-URANIUM ELKON DEPOSIT

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2017
A wide range of the temperatures of hydrothermal fluid regime (430-103 °C) has been revealed in the result of microthermometric study of the fluid inclusions in the minerals of pre-ore and post-ore stages developed at the Elkon deposit.
M. M. Komarova   +3 more
doaj   +1 more source

THREE-DIMENSIONAL GIS MODELING OF THE STRELTSOVSKAYA CALDERA’S COVER ON THE BASIS OF SURFACE RELIEF AND THE BASEMENT’S TOP DIGITAL MODELS

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2018
Based on the consideration and analysis of different approaches to obtaining data for constructing a digital elevation model and types of  three-dimensional surface representation, the choice of the most  optimum technique for construction and ...
I. O. NAFIGIN   +2 more
doaj   +1 more source

Assessment of Seismogeodynamic Activity of Mining Areas on the Basis of 3D Geoinformation Modeling

open access: yesRussian Journal of Earth Sciences, 2022
The article deals with the creation of an information and analytical platform for assessing external causes of technogenic (man-made) accidents and for improving methods of their predication and prevention on the territories of long-term geological ...
Petrov V.   +4 more
doaj   +1 more source

Provenance history of a Late Triassic-Jurassic Gondwana margin forearc basin, Murihiku Terrane, North Island, New Zealand: petrographic and geochemical constraints [PDF]

open access: yes, 2004
The Murihiku Terrane in the North Island was a forearc basin adjacent to a volcanic arc along the eastern margin of Gondwana during the Mesozoic. The rocks that infill the basin are mainly volcaniclastic sandstones and mudstones, often turbiditic, with ...
Briggs, Roger M.   +2 more
core   +2 more sources

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