Results 51 to 60 of about 64,749 (299)

ZIRCONOLITE OF ALKALINE PEGMATITES OF THE VISHNEVYE MOUNTAINS: THE FIRST FINDINGS IN THE SOUTH URALS [PDF]

Минералогия, 2018
Zirconolite, a complex oxide with an idealized formula (Ca,REE)Zr(Ti,Fe,Nb)2O7 , is an accessory mineral of Nb ores from alkali pegmatites and carbonatites of the Vishnevogorsk alkaline complex (South Urals, Russia).
V.A. Popov, V.I. Popova, I.A. Blinov, V.A. Kotlyarov   +3 more
doaj  

Effect of confining pressure on fracture characteristics and mineralogical behavior of tight sandstone specimens after hydraulic fracturing

Deep Underground Science and Engineering, EarlyView.
Hydraulic fracturing in tight sandstone and fracture propagation characteristics using backscattered electron‐scanning electron microscope (BSE‐SEM) images. Abstract This study focuses on hydraulic fracturing experiments conducted under triaxial conditions on tight sandstone specimens from Shivpuri district, Madhya Pradesh, India.
Pankaj Rawat, Narendra Kumar Samadhiya
wiley   +1 more source

Celebrating the International Year of Mineralogy Progress and Landmark Discoveries of the Last Decades

, 2023
Presents most important discoveries in mineralogy of the last decades Promotes research in mineralogy, crystallography and their links to other sciences Helps to increase public awareness of the importance of natural ...
Luca Bindi, Cruciani, Giuseppe, Giuseppe Cruciani, Bindi, Luca   +3 more
core   +1 more source

MICROTOPOCHEMISTRY OF MARCASITE-PYRITE NODULE IN ILLITE-HEMATITE GOSSANITES OF THE LAHANOS MASSIVE SULFIDE DEPOSIT (PONTIDES, TURKEY): LA-IСP-MS DATA [PDF]

Минералогия, 2017
In addition to black shales, the sulfide nodules can occur in red-colored aposulfide deposits, e.g., illite-hematite gossanites of the Lahanos massive sulfide deposit (Pontides, Turkey), where the marcasite-pyrite nodules are located at the base of the ...
V.V. Maslennikov, N.R. Ayupova, D.A. Artem′ev, A.S. Tseluyko   +3 more
doaj  

Optimization of cut‐hole layout under high in situ stress based on numerical simulation and field tests

Deep Underground Science and Engineering, EarlyView.
This study investigates the blast‐induced rock damage patterns under different cut‐hole layouts and ground stress conditions through numerical simulations and field tests. The findings in this study provide valuable insights for similar underground engineering applications.
Junjie Zhao, Diyuan Li, P. G. Ranjith, Xinxin Lü, Yanliang Li, Xiaoli Su   +5 more
wiley   +1 more source

Trial calculation of relating the equilibrium state of minerals to the descriptive mineralogy

, 1997
Statistical calculation have been carried out on the volumes of the asymmetric unit of minerals. This treatment is related to the origin of the symmetry and periodicity of the crystals, and to the equilibrium conditions of these crystals.
Kawahara, Akira
core   +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, I.A. Blinov, A.M. Yuminov, D.M. Galimov, D.A. Zherebtsov, E.V. Zaykova, M.N. Ankushev, V.M. Ryzhkov, M.A. Rassomakhin, I.A. Yusupov   +9 more
doaj  

Resonance‐induced restoration of rock permeability degraded by heavy components of crude oil

Deep Underground Science and Engineering, EarlyView.
Resonance‐induced changes occur in filtration properties of sedimentary rocks in crude paraffin oil flow under acoustic vibrations. Experimental data on (a) pressure drop; (b) permeability; (c) pressure at the rock inlet; and (d) pressure at the rock outlet are presented.
Evgenii Riabokon, Qian Yin, Mikhail Guzev, Mikhail Turbakov, Evgenii Kozhevnikov, Nadezhda Riabokon, Ivan Panteleev   +6 more
wiley   +1 more source

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, V.A. Popov, S.N. Nikandrov, E.I. Churin, I.A. Blinov, P.V. Khvorov   +5 more
doaj  

Rockburst prediction based on data preprocessing and hyperband‐RNN‐DNN

Deep Underground Science and Engineering, EarlyView.
A data preprocessing workflow is proposed to address challenges in rockburst data analysis. Coupled algorithms preprocess the data set, and hyperband optimization is used to enhance RNN performance. Results show that preprocessing improves accuracy, while dense layers enhance model stability and prediction performance.
Yong Fan, Chenxi Yin, Guangdong Yang, Shengyong Ding, Bin Tian   +4 more
wiley   +1 more source