Results 61 to 70 of about 224,796 (336)
The Depositional Record, EarlyView.This paper discusses a new model concerning the precipitation mechanismand significance of anhydrite cement in tight sandstone. Anhydrite cement ismainly formed by the dissolution and reprecipitation of early‐diageneticcalcite cements, feldspars and volcanic rock fragments at the mesodiageneticstage.
Long Luo +10 more
wiley +1 more source
ASSESSMENT OF GOLD MELT INFLUENCE ON THE PLATINOID MICROINCLUSIONS IN ANCIENT GOLD PRODUCTS: A COMPARISON WITH EXPERIMENTAL DATA [PDF]
Минералогия, 2017 The results of gold melt influence on platinoid microinclusions in ancient gold products from the burial mounds of the Urals and Phanagoria are compared with the experimental data.
V.V. Zaykov +9 more
doaj
Mineralogy and physic-chemical characteristics of indurated shale quarry waste and influence of firing temperature on their ceramic properties for incorporation in production of roofing tile [PDF]
, 2022 Obisi Matthias Nweke +3 more
openalex +1 more source
Deep Underground Science and Engineering, EarlyView.The present study uses the Modified Mohr‐Coulomb true‐triaxial failure criterion (MMC_TT), which predicts the strength of rock better than the MGC criterion in laboratory true‐triaxial tests to overcome the limitations. Moreover, based on the data from previously published five vertical wells in the Krishna‐Godavari basin (K‐G basin), an empirical ...
Ravindra K. Burnwal, Aditya Singh
wiley +1 more source
The sapphirine-spinel hornblendites of Il’meno-Vishnevogorsky complex
Литосфера, 2017 The authors consolidated disparate information about sapphirine-bearing rocks of the Urals. It is shown that they belong to genetically different entities.
V. G. Korinevsky +6 more
doaj +2 more sources
CARBONATES FROM THE VISHNEVOGORSKOE ZR-NB DEPOSIT (SOUTHERN URALS) [PDF]
Минералогия, 2015 Data on carbonates in alkaline rocks, pegmatites, and late veinlets of the Vishnevogorskoe deposit are summarized. Among 21 minerals studied, calcite is the major mineral; dolomite, ankerite, siderite, aragonite, bastnasite-(Ce), and strontianite are ...
V.I. Popova +5 more
doaj
Stellar dust production and composition in the Magellanic Clouds [PDF]
, 2012 The dust reservoir in the interstellar medium of a galaxy is constantly being replenished by dust formed in the stellar winds of evolved stars. Due to their vicinity, nearby irregular dwarf galaxies the Magellanic Clouds provide an opportunity to obtain ...
Kemper, F.
core +2 more sources
Blasting effects of cross‐fault deep‐buried excavation on adjacent existing tunnel stability
Deep Underground Science and Engineering, EarlyView.Based on the theoretical analysis of cylindrical wave propagation in a deep rock mass in the fault with a filling layer, the calculation method of peak particle velocity caused by wave propagation in the existing tunnel is established. The viscoelastic characteristics of a rock mass are examined in the analysis.
Shaobo Chai +5 more
wiley +1 more source
Deep Underground Science and Engineering, EarlyView.In this study, the nonuniform distribution of the bearing pressure in front of the coal wall has been revealed based on in situ monitoring data and numerical simulation results. Therefore, an eccentric compression mechanical model of the coal wall was established to study the deformation and failure characteristics of a coal wall. The slenderness ratio
Maolin Tian +6 more
wiley +1 more source
Infrared observations of asteroids from earth and space [PDF]
Infrared reflectances at wavelength between 1 and 4 micrometers are used for determining asteroid surface mineralogy, surface composition, diameters, and albedos.
Lebofsky, L. A. +2 more
core +1 more source