Results 21 to 30 of about 16,702 (208)

Complex examination of the Upper Paleozoic siliciclastic rocks from southern Transdanubia, SW Hungary—Mineralogical, petrographic, and geochemical study [PDF]

open access: yes, 2007
A vertical section of Upper Paleozoic sandstones from southern Transdanubia (Mecsek-Villány area, Tisza mega-unit, Hungary) has been analyzed for major and trace elements, including rare earth elements (REEs).
Á   +35 more
core   +1 more source

The Synthesis and Characterization of Poly(methyl methacrylate-tourmaline acrylate)

open access: yesAdvances in Materials Science and Engineering, 2016
In order to synthesize the tourmaline-containing functional copolymer, the polymerizable organic tourmaline acrylate was prepared by the surface modification on tourmaline powder and then copolymerization with methyl methacrylate to get poly(methyl ...
Yingmo Hu, Xubo Chen, Yunhua Li
doaj   +1 more source

Quartz-tourmaline metasomatites in gold deposits in Aktyuz-Boordinsky ore district (Northern Tien Shan, Kyrgyzstan)

open access: yesРуды и металлы, 2023
In the Aktyuz-Boordinsky ore district in the Northern Tien Shan, numerous deposits and ore occurrences of gold, rare and rare earth metals and base metals are discovered.
Pak N. T.   +4 more
doaj   +1 more source

Congo River sand and the equatorial quartz factory [PDF]

open access: yes, 2019
A never solved problem in sedimentary petrology is the origin of sandstone consisting exclusively of quartz and most durable heavy minerals. The Congo River offers an excellent test case to investigate under which tectonic, geomorphological, climatic ...
Andò, Sergio   +10 more
core   +1 more source

Photocatalytic mechanism of tourmaline/ZnO composites

open access: yesCailiao gongcheng, 2019
Tourmaline/ZnO composite material was prepared by one-step hydrothermal method. The structure, morphology and optical properties of the samples were characterized by X-ray diffraction, scanning electron microscopy, X-ray fluorescence spectroscopy and UV ...
QI Shu-yan   +3 more
doaj   +1 more source

A chromian tourmaline from Outokumpu, Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 1968
Chromian tourmaline, a member of the dravite group, has been encountered in the Cr-bearing skarns occuring between the serpentinites and quartzites in the Outokumpu area, in association with chrome-bearing silicates ang oxides.
E. Peltola, Y. Vuorelainen, T.A. Häkli
doaj   +1 more source

Preparation and Photocatalytic Activity of Nitrogen-doped Nano TiO2/Tourmaline Composites

open access: yesCailiao gongcheng, 2016
Using Ti(OC4H9)4 as precursor, CO(NH2)2 as nitrogen source, tourmaline as support, the nitrogen-doped nano TiO2/tourmaline composites were synthesized by sol-gel method with ultrasound assisted.The structure and performance of composites were ...
LIU Xin-wei   +3 more
doaj   +1 more source

Epigenetic gold occurrence in a Paleoproterozoic meta-evaporitic sequence in the Rompas-Rajapalot Au system, Peräpohja belt, northern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2018
The Rompas-Rajapalot gold prospect is located in the northern part of the Paleoproterozoic Peräpohja belt. It covers an area of at least 10 x 10 km and comprises various styles of gold mineralization ranging from localized high-grade Au pockets in ...
Ranta, J.-P.   +3 more
doaj   +1 more source

Scan Quantum Mechanics: Quantum Inertia Stops Superposition

open access: yes, 2016
A novel interpretation of the quantum mechanical superposition is put forward. Quantum systems scan all possible available states and switch randomly and very rapidly among them.
Gato-Rivera, Beatriz
core   +1 more source

Mineralogy and distribution of critical elements in the Sn–W–Pb–Ag–Zn Huanuni deposit, Bolivia [PDF]

open access: yes, 2019
The polymetallic Huanuni deposit, a world-class tin deposit, is part of the Bolivian tin belt. As a likely case for a “mesothermal” or transitional deposit between epithermal and porphyry Sn types (or shallow porphyry Sn), it represents a case that ...
Alfonso, Pura   +12 more
core   +2 more sources

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