Amethyst Deposits of the Los Catalanes Gemological District (Artigas Department): The First Uruguayan IUGS Geological Heritage Site by César Goso, Mauricio Faraone

“…The Paraná igneous province, a dominant tholeiitic basaltic and scarce acidic province that extends into parts of Brazil, Paraguay, Argentina and Uruguay, contains amethyst and agate deposits of unique international significance because of frequent mega-geode concentration, enormous reserves, and gemstone quality of varied size and forms. Although quartz-filled geodic cavities are common in the southern Serra Geral Formation in Brazil (Ametista do Sul, Quaraí), the more intense purple amethysts in giant geode deposits are found in the Arapey Formation in the lower-middle basin of the Catalán Grande stream in Uruguay. …”
Get full text

PROCESSING OF GYPSUM-BEARING MATERIALS IN THE BRONZE AGE GONUR DEPE ARCHEOLOGICAL SITE (SOUTHEAST KARAKUM DESERT) by L.Ya. Kabanova, A.M. Yuminov, I.A. Blinov

“…The mixture also contains grains of quartz (5–10 %), feldspar (up to 1%), mica (up to 1 %) and other minerals. …”
Get full text

Mathematical modelling and simulation analysis of a modified Butterworth van Dyke circuit model for non‐invasive diabetes detection by Srinivasan Lekha, Suchetha Manikandan

“…In this study, acetone levels are measured using quartz crystal microbalance sensor that has wide‐scale application as a bio‐sensor. …”
Get full text

Characterization of Fly Ash Generated from Matla Power Station in Mpumalanga, South Africa by Olushola S. Ayanda, Olalekan S. Fatoki, Folahan A. Adekola, Bhekumusa J. Ximba

“…The results showed that the fly ash is alkaline and consists mainly of mullite (Al6Si2O13) and quartz (SiO2). Highly toxic metals As, Sb, Cd, Cr, and Pb as well as metals that are essential to health in trace amounts were also present. …”
Get full text

Two-stage oxidation of petrogenic organic carbon in a rapidly exhuming small mountainous catchment by Wan-Yin Lien, Chih-Tung Chen, Yun-Hsuan Lee, Chih-Chieh Su, Pei-Ling Wang, Li-Hung Lin

“…Our Raman analyses indicate that while highly graphitized carbon in slate/schist transformed into disordered form during soil development, the preferential elimination of disordered form was found along submarine transit. Additionally, quartz/rutile outperformed mica in protecting petrogenic organic carbon from transport abrasion and microbial degradation. …”
Get full text

Sulfosalts and Sulfates in the Epithermal Au-Ag-Te Emmy Deposit (Khabarovsk Territory, Far East of Russia): Implications for the Mineralization Process by Tamara Yu. Yakich, Panagiotis Voudouris, Darya V. Levochskaia, Alexey K. Mazurov, Mikhail V. Shaldybin, Yuriy M. Lopushnyak, Alexey S. Ruban, Evan Dasi, Prokopiy N. Maximov, Ekaterina A. Sinkina, Ksenia V. Bestemianova, Maxim A. Rudmin

“…The study of fluid inclusions in quartz within the Emmy deposit showed the hydrothermal ore process at a temperature of 236–337 °C. …”
Get full text

Micro- and Nanoscale Pore Structure Characterization and Mineral Composition Analysis of Clayey-Silt Hydrate Reservoir in South China Sea by Cheng Lu, Yuxuan Xia, Xuwen Qin, Chao Ma, Hang Bian, Donghui Xing, Hongfeng Lu

“…The mineral composition of the reservoir is mainly quartz and contains a certain amount of clay minerals, mainly illite, while the mineral composition of reservoir rich in microbial fossils is mainly carbonate. …”
Get full text

Investigation of Early Corrosion Behavior of Canister Candidate Materials in Oxic Groundwater by the EQCM Method by Gha-Young Kim, Sung-Wook Kim, Junhyuk Jang, Seok Yoon, Jin-Seop Kim

“…This study investigated the corrosion mass changes of canister candidate materials (Cu, Ni, Ti, SS304) in an oxic groundwater solution using the electrochemical quartz crystal microbalance method in order to estimate corrosion thickness. …”
Get full text

Supercritical Fluid Geochemistry in Geothermal Systems by Matylda Heřmanská, Barbara I. Kleine, Andri Stefánsson

“…The results are consistent with the observed mineral deposition of quartz, aluminum silicates, and minor amount of salts during boiling. …”
Get full text

Effect of Particle Shape on Mechanical Behaviors of Rocks: A Numerical Study Using Clumped Particle Model by Guan Rong, Guang Liu, Di Hou, Chuang-bing Zhou

“…Model parameters for simulation in PFC are obtained by triaxial compression test of quartz sandstone, and simulation of triaxial compression test is then conducted on four rock samples with different particle shapes. …”
Get full text

Study on the Performance of Expansive Subgrade Soil Stabilized with Enset Ash by Derara Neguse, Eleyas Assefa, S. M. Assefa

“…The mineralogical composition of expansive soil is identified by XRD, and the result shows that the expansive soil in the study area is mainly composed of quartz and montmorillonite, which separately take up 50% and 38.5% of the total air-dried sample, while the percentage of kaolinite was 11.5%. …”
Get full text

Feasibility of concentrating potassium minerals from Verdete ore by cell flotation by Laryssa Batista Christina Cordeiro, Michelly dos Santos Oliveira, Kátia Dionísio de Oliveira, Marcos Antônio de Souza Barrozo, Cícero Naves de Ávila Neto

“…The goal was to evaluate the flotation behaviour of the ore constituents (glauconite, muscovite, K-feldspar and quartz) relative to the use of different collectors (fatty acid soap obtained from rice oil, amine and oleic acid) and depressors (gelatinized cornstarch and sodium silicate). …”
Get full text

Narrowband, Visible-Blind UV-A Sensor Based on a Mg0.52Zn0.48O Film Deposited by Radio-Frequency Sputtering Using a ZnO-Mg Composite Target by Yuki Kohama, Takuya Nagai, Mitsuru Inada, Tadashi Saitoh

“…A narrowband, visible-blind ultraviolet photodetector (PD) for UV-A is fabricated using a Mg0.52Zn0.48O film that is formed on a quartz substrate by a radio-frequency sputtering technique using a ZnO-Mg composite target. …”
Get full text

Thermal behavior of Zefreh dolomite mine (Central Iran) by Shahraki B.K., Mehrabi B., Dabiri R.

“…X-ray diffraction analysis of heat treated samples up to 750ºC indicates that dolomite structure changes into calcite. The increases in quartz content accelerated the mechanochemical deformation and amorphization of dolomite phase. …”
Get full text

The influence of nucleus dates waste and ceramic wastes in sustainable concrete by Radwa Defalla Abdel Hafez, Raghda Osama Abd-Al Ftah, Khaled Abdelsamie

“…Ten SEC combinations were prepared: 10%, 20%, and 30% of NDA, CWA, or a combination of both. After testing, quartz powder (Q.P) or silica fume (S.F.) can increase the UHPC by enhancing its mechanical characteristics. …”

Fluorine-rich hydrogarnet, prehnite and pumpellyite in monzodioritic basement of the Rhine Rift Valley produced by in-situ low-grade metamorphism at 200 °C and 5 km depth by Kurt Bucher, Moritz Hofer, Florentin Ladner, Ingrid Stober

“…The recovered core material from 4.9 km depth shows coarse grained biotite-hornblende quartz-monzodiorite from the Variscan basement. The primary igneous rock is locally altered and contains prehnite, pumpellyite, mica and chlorite as major alteration products. …”
Get full text

Study on Local Brittleness of Rock Based on Multiple Linear Regression Method: Case Study of Shahejie Formation by Meng Cai, Yang Wang, Wanchun Zhao, Xiaodong Shi, Teng Li

“…The results showed that quartz, plagioclase, analcite, siderite, and pyrite were high brittle minerals while clay minerals were low brittle minerals. …”
Get full text

Frost Durability and Strength of Concrete Prepared with Crushed Sand of Different Characteristics by Ming-kai Zhou, Zhan-ao Liu, Xiao Chen

“…Lithology has no prominent influence on frost durability and compressive strength of CSC within the lithologies (dolomite, limestone, granite, basalt, and quartz) studied. Though compressive strength of CSC is a little higher than RSC under equal water to cement ratio, frost durability of CSC is no better than RSC especially for C30 CSC, and air-entraining agent is suggested for enhancing frost durability of C30 CSC exposed to freezing environment.…”
Get full text

Interaction and Adsorption of Hydrophobically Modified Polyacrylamide on Silica and Asphaltene Surfaces by Wenjie Zou, Zichuan Fang, Zhijun Zhang, Zhenzhen Lu

“…., P(AM-NaAA-C16DMAAC), on silica and asphaltene were investigated using surface force measurements, thermodynamic analysis and quartz crystal microbalance with dissipation (QCM-D) measurement. …”
Get full text

The Role of Liquid Fuels Channel Configuration on the Combustion inside Cylindrical Mesoscale Combustor by Achmad Fauzan Hery Soegiharto, I. N. G. Wardana, Lilis Yuliati, Mega Nursasongko

“…This research intended to investigate combustion of liquid fuel in 3.5 mm inner diameter quartz glass tube mesocombustor, based on liquid film evaporation by using heat recirculation. …”
Get full text