Results 21 to 30 of about 222,262 (199)

An oxidised intrusion-related origin in the controversial Jiaodong gold province (China) for the Shicheng Au-Cu deposit

open access: yesAll Earth, 2021
The Shicheng Au-Cu deposit is hosted in the late Early Cretaceous Sanfoshan pluton within the Muping-Rushan (Mu-Ru) metallogenic belt, southeast Jiaodong.
Hadi M. Elshourbagi, Hong-Rui Fan
doaj   +1 more source

New data on the mineralogy of the gold-sulfide ore type of the Karalveem deposit, Chukotka

open access: yesРуды и металлы, 2022
In this paper, we present the results of a mineralogical study of the ores of the Karalveem deposit in the northeast of Russia (Central and Ruslovy areas). Gold mineralization is characterized by two types of ores: gold-quartz-arsenopyrite (quartz veins
Ruslan A. Maksarov   +4 more
doaj   +1 more source

Interpretasi Mineralisasi Epitermal Berdasarkan Studi Ubahan Hidrotermal dan Tekstur Urat Kuarsa di Kawasan Hutan Lindung Taliwang, Nusa Tenggara Barat

open access: yesIndonesian Journal on Geoscience, 2014
http://dx.doi.org/10.17014/ijog.vol2no3.20072Taliwang conservation forest, West Nusa Tenggara, is particularly covered by volcanic rocks consisting of alternated breccia and tuff.
Danny Zulkifli Herman
doaj   +1 more source

The Origin of the Gold of Quartz Veins [PDF]

open access: yesScientific American, 1894
n ...
openaire   +1 more source

Investigation of Antimony mineralization and mass transfer in host rocks, Baout, west of Zahedan (southeast of Iran)

open access: yesJournal of Economic Geology, 2021
Introduction The Baout antimony deposit is located 80 km west of Zahedan. Antimony occurs as a trace element in Earth crust, introduced in many minerals, especially sulfides and sulfosalts and occurs as small high grade ore deposits in different parts ...
Halimeh Mojadadi Moghadam   +2 more
doaj   +1 more source

Hydration of Silica and Its Role in the Formation of Quartz Veins – Part 1

open access: yesSubstantia, 2018
The crystalline forms of quartz and that it is insoluble are well known. The hydrolysis of silica and formation of polymeric silicic acids in slightly alkaline (pH 8.1 - 8.3) sea water is less well known and not recognised by many geologists.
John Elliston
doaj   +1 more source

Mechanical Properties of Coronary Veins [PDF]

open access: yes, 2008
There are several publications available and experiments were done regarding to the vessel biomechanical properties. In the range we could find in vitro and in vivo assessments data for elasticity properties.
Dobránszky, János   +3 more
core   +1 more source

Late-orogenic gold deposits of Egypt

open access: yesГорные науки и технологии, 2018
Egypt belongs to states developing its mineral resource base. Gold-bearing territory of Egypt is located within the Nubian-Arabian shield in the Neoproterozoic collision zone of transverse thrusts.
Hani Sharafeldin Elsayed
doaj   +1 more source

Quartz forming conditions in secant veins in granodiorites of the Andean intrusive complex of the Barchans Islands (Argentine Islands, West Antarctic)

open access: yesДоповiдi Нацiональної академiї наук України
It is established that the growth of quartz in veins in granodiorites of the Andean intrusive complex (the Barchans Islands, West Antarctic) happened in rock crystal-bearing veins of steep falling, in which the temperature difference necessary for the ...
I.М. Naumko   +5 more
doaj   +1 more source

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