Results 61 to 70 of about 4,092 (217)

Pegmatites and alkali feldspar granites as sources of industrial K-feldspar: A study from Borucu, Aksaray, Central Türkiye

Bulletin of the Mineral Research and Exploration
The Borucu (Aksaray) region, within the Central Anatolian Crystalline Complex, comprises a variety of rocks, including granite, alkali feldspar granite (AFG), pegmatite, and aplite dikes.
Gökhan Demirela, Mustafa Haydar Terzi, Ahmet Fatih Oskay   +2 more
doaj   +1 more source

Geology of the central uplift of the Kamestastin Lake impact structure, Labrador, Canada

Meteoritics &Planetary Science, EarlyView.
Abstract The ~28 km Kamestastin (Mistastin) Lake impact structure is a relatively well‐preserved and well‐exposed complex impact structure. The central uplift of this structure is accessible as two islands in the middle of Kamestastin Lake. We present an updated, detailed geological map and description of Horseshoe and Bullseye islands that provides ...
A. C. Singleton, G. R. Osinski
wiley   +1 more source

Discovery of "Primitive clay precursors" on Alkali-feldspar

, 1995
Alkali-feldspar in an alkaline rock shows evidence for the formation of iron rich primitive clay precursors in the earliest weathering stage. High-resolution TEM with EDAX, electron diffraction patterns and lattice images clearly show the decomposion of ...
田崎, 和江, 80211358, Fyfe, W. S., Tazaki, Kazue, 164, 15745   +5 more
core   +1 more source

Late sodic metasomatism evidences in bimodal volcanic rocks of the Acampamento Velho Alloformation, Neoproterozoic III, southern Brazil

Anais da Academia Brasileira de Ciências, 2007
A mineralogical study was carried out in mafic and felsic volcanic rocks of the Acampamento Velho Alloformation at Cerro do Bugio, Perau and Serra de Santa Bárbara areas (Camaquã Basin) in southern Brazil.
Delia Del Pilar M. de Almeida, Vitor P. Pereira, Adriane Machado, Henrique Zerfass, Ricardo Freitas   +4 more
doaj   +1 more source

Origin and formation of a chondritic xenolith in Krymka (LL3.2, breccia): Indications for a late formation of the accretionary breccia

Meteoritics &Planetary Science, EarlyView.
Abstract An unusual chondritic xenolith was found in two sequentially prepared thin sections of a sample from the Krymka (LL3.2) chondrite. The xenolith has a rounded, slightly deformed shape of about 5 mm in apparent diameter and is partially surrounded by a double rim made of an inner fine‐grained silicate‐rich rim and an outer sulfide‐rich rim.
Aelita Girich, Addi Bischoff, Samuel Ebert, Kazuhide Nagashima, Andreas Morlok, Harald Hiesinger, Jasper Berndt   +6 more
wiley   +1 more source

Research on fine-grained classification of rare metal granite lithology based on deep learning

矿业科学学报
Fine-grained image classification has high research value and application prospects in practical applications. At present, the traditional lithology fine-grained classification method is highly subjective and time-sensitive, depending on the experience ...
ZHAO Hengqian, WANG Pan, LIU Zhiguo, MIAO Qunfeng, LI Zhibin, TANG Guanglong, QI Yunfei, XIE Yu, WANG Mengmeng   +8 more
doaj   +1 more source

Phlogopite and associated minerals from Permian minettes in Devon, South England [PDF]

Bulletin of the Geological Society of Finland, 1985
Electron-microprobe analyses were made of mica, clinopyroxene, alkali feldspar, Fe‒Ti oxides and apatite in Permian minettes from Hannaborough Quarry, Killerton Park and Loxbeare Farm, south Devon, England.
A.P. Jones, J.V. Smith
doaj   +1 more source

A Windows Program for Feldspar group thermometers and hygrometers

, 2022
A Microsoft (R) Visual Basic software, called WinFeldth, has been developed for plagioclase, alkali feldspar and liquid compositions that coexisting as two-feldspar, plagioclase-liquid and alkali feldspar-liquid pairs to calculate the temperature (T ...
Yavuz, Fuat, Yavuz, Enver Vural
core   +1 more source

Feldspar production from dimension stone tailings for application in the ceramic industry

Journal of Materials Research and Technology, 2019
Brazil has one of the largest reserves of granite in the world and is in part of the top ten producers of dimension stone. The dimension granite extensive mining in this country generates expressive volumes of tailings, among then rock fragments and fine
André Carlos Silva, Sílvio Divino Carolina, Débora Nascimento Sousa, Elenice Maria Schons Silva   +3 more
doaj   +1 more source

Automated Mineral Identification and Rock‐Type Classification of Lunar Mare Basalts Using SEM Images

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.
Abstract We present an automated system for identifying minerals and classifying rock types in Apollo lunar mare basalts using scanning electron microscopy (SEM) imagery. Mineral segmentation is based on a U‐Net architecture, supplemented by two scale‐aware models designed to incorporate pixel size information.
Ji‐In Jung, Sonia M. Tikoo, Jaehong Chung, Claire I. O. Nichols   +3 more
wiley   +1 more source