Results 21 to 30 of about 305 (130)

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

open access: yes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   +8 more
doaj   +1 more source

A Study on Amazonite, a Kind of Prehistoric Jade Artefacts in Korea [PDF]

open access: yesJournal of the Mineralogical Society of Korea, 2013
우리나라를 비롯해 중국, 일본, 러시아 등 동북아시아에서는 선사시대의 장식용 옥기류가 출토되고 있다. 옥기의 출현은 원시 씨족사회에서 문명국가로 변천해 나가는 과정의 중요한 현상 중의 하나로 인식되고 있다. 따라서 옥기에 대한 연구는 한반도를 비롯한 동북아시아지역 선사시대 문화를 조명하는데 매우 중요하지만(Lim, 2003, 2012), 옥기에 대한 연구 진척은 다른 나라에 비해 열악한 실정이다. 청동기시대에는 다양한 옥기류가 사용되었고, 특히 남해안 중심의 청동기 유적지에서 출토된 장식용 옥기류, 즉 식옥(飾玉)에 대한 연구 결과를 보면 그 재질을 대부분 천하석(天河石)으로 규정하고 약간의 벽옥도 포함시키고 있다(Choi ...
Yong-Joo Jwa   +3 more
openaire   +1 more source

Age and geochemical evolution of granite magmatism in Olkhon region from Caledonian syncollisional ore-free granite to the rare metal granite and pegmatite of Middle Paleozoic intraplate setting

open access: yesChina Geology
The detailed description of two granite complexes in the Olkhon subterrane is given. The Early Paleozoic Sharanur complex was formed by granitization of gneisses of the Olkhon series.
Viktor Antipin   +3 more
doaj   +1 more source

Spectral Identification Characteristics of Typical Rocks and Minerals in Alkali Feldspar Granite Type Nb-Ta Deposits in Central Inner Mongolia

open access: yesYankuang ceshi
Located in the central region of Inner Mongolia, within the southern segment of the Daxing’anling-North China Craton metallogenic belt, the area is notable for its widespread distribution of alkaline granite-type niobium-tantalum (Nb-Ta) deposits ...
Feicui WANG   +6 more
doaj   +1 more source

Amazonite (A Microcline Feldspar) - An Anti-Cancerous Geo-Biotechnological Approach for H460: Human Lung Cancer with Validation via Ros Anti-Oxidant Analysis [PDF]

open access: yes
The research delves into the medicinal properties of amazonite, with a particular focus on its potential application in nanomedicine for combating lung cancer. Employing the MTT Assay, the authors observed amazonite\u27s impact on H460 lung cancer cells,
Singara Subramanian   +5 more
core   +1 more source

Amazonite (variety of microcline) with smoky quartz: Colorado, Park County, Lake George district

open access: yes, 2022
4.1 x 3.0 x 2.0 in.Related image: FRM0725B.Copy of image held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: Front Range Minerals, Golden, CO.The mineral specimen comes from the Lake George ...

core  

Sur une pegmatite a amazonite du Tibesti

open access: yesBulletin de la Société Géologique de France, 1951
Abstract An amazonite-bearing pegmatite mapped in the Dohona massif in the northeastern Tibesti mountains, French Equatorial Africa, is composed essentially of quartz with both amazonite and pink microcline, the latter perthitic, and accessory muscovite, topaz, and fluorite.
A. Sandrea   +2 more
openaire   +1 more source

Amazonite: History, Properties, Occurrences, and Uses

open access: yes, 2014
Amazonite is a variation of the mineral microcline. A member of the potassium feldspar group, Amazonite is a biaxial mineral belonging to the triclinic crystal system. Microcline was first discovered in 1830 by Johann Friedrich August Breithaupt.
Sandreuter, Stefan
core   +1 more source

Petrogenesis of Shihuiyao Rare-Metal Granites in the Southern Great Xing’an Range, NE China

open access: yes, 2023
Shihuiyao Rb–Nb–Ta-rich granites from the Late Jurassic period are newly discovered rare-metal-bearing granites found in the southern Great Xing’an Range, NE China.
Duo Zhang   +6 more
core   +1 more source

Searching for the Garamantian emerald. Reconsidering the green-colored stone beads trade in the ancient Sahara

open access: yes, 2017
In the current literature, Saharan green-colored stone beads are identified with the term ́emeraude garamantique, while several archaeological investigations on Garamantian contexts referred to them as amazonite.
Vignola, Pietro   +14 more
core   +1 more source

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