Results 21 to 30 of about 517 (108)

Tertiary Meteoric Hydrothermal Systems and their Relation to Ore Deposition, Northwestern United States and Southern British Columbia [PDF]

open access: yes, 1991
Tertiary meteoric hydrothermal systems have altered the rocks exposed over more than 5 % of the land surface of the northwestern United States and southern British Columbia, including at least 25,000 km^2 in Idaho.
Criss, Robert E.   +2 more
core   +1 more source

GOLD-JASPEROID MINERALIZATION IN ZONE OF THE SHARTYMSKIY FAULT (SOUTH URALS)

open access: yesВестник Пермского университета. Геология, 2020
The Shartymskiy Graben was formed at zone of the Shartymskiy Fault in the late collision stage of development of the Southern Urals on the joint of the Western and Eastern Magnitogorsk sub-zone in conditions of variable compression and stretching, and was made with the Lower Carboniferous limestone. Occurrences of gold-bearing metasomatites (jasperoids,
openaire   +2 more sources

Metallogenic features of Miocene porphyry Cu and porphyry-related mineral deposits in Ecuador revealed by Re-Os, 40Ar/39Ar, and U-Pb geochronology [PDF]

open access: yes, 2018
Mineralization and alteration events at ten Miocene porphyry Cu and porphyry-related epithermal mineral deposits in southern, central, and northern Ecuador were dated by means of molybdenite Re-Os, biotite and alunite 40Ar/39Ar, and titanite U-Pb ...
Barra, Fernando   +4 more
core  

Use of the Surfer package in the interpretation of the geochemical data from the Alshar mineralized area, R. Macedonia [PDF]

open access: yes, 2014
Within these trials were treated results of 288 lithogeochemistry and 362 soil samples. Gold, silver and arsenic were the elements selected for the geochemical interpretation in the Surfer software package.
Tasev, Goran   +2 more
core  

Critical elements in nonsulphide Zn deposits: A reanalysis of the Kabwe Zn-Pb ores (central Zambia) [PDF]

open access: yes, 2018
The Kabwe Zn-Pb deposit (central Zambia) consists of a cluster of mixed sulfide and non-sulfide orebodies. The sulfide ores comprise sphalerite, galena, pyrite, chalcopyrite and accessory Ge-sulfides (±Ga and In).
Boyce, A. J.   +5 more
core   +3 more sources

Akurasi Wavelenght–dispersive X-ray Flourescence [PDF]

open access: yes, 2004
Wavelenght-Dispersive X-Ray Flourescence Accuration. X-Fuorescence spectrometry is a method, which isincreasingly applied in the geochemical analysis.
Widyatmoko, H. (H)
core  

BİR EPİTERMAL CEVHERLEŞMENİN ANATOMİSİ: MUMCU (BALIKESİR-SINDIRGI), İÇ-BATI ANADOLU

open access: yesBulletin of the Mineral Research and Exploration, 1997
Mumcu'daki epitermal cevherleşme, Simav grabenini dik olarak enine kesen "basit transfer fayları" üzerinde, Paleozoyik (?) yaşlı metamorfitler ile Miyosen yaşlı andezitik volkanitier arasında gelişmiştir.
Vedat OYGÜR
doaj  

Mineralogical and geochemical characteristics of uranium-rich fluoriteinEl-Missikat mineralized granite,Central Eastern Desert, Egypt

open access: yesGeologija, 2009
A unique, highly radioactive variety of fluor it emineral has been recorded in the uranium occurrence of El-Missikat sheared granite pluton. In this occurrence, the uranium assumes different forms, including its presence as discrete, visible, secondary ...
Mohamed Fahmy Raslan
doaj  

THE EVOLUTION OF STONE WEAPON ELEMENTS AND CULTURAL DYNAMICS DURING THE MESOLITHIC IN SOUTHWESTERN FRANCE : THE CASE OF THE HAUT QUERCY (LOT, FRANCE) [PDF]

open access: yes, 2008
International audienceFollowing a recent quantitative and qualitative renewal of archaeological research in the Quercy, this region has become particularly favourable for analyses of the cultural dynamics of Mesolithic societies in southwestern France ...
Bosc-Zanardo, Bruno   +2 more
core   +2 more sources

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