نتایج جستجو برای: native gold

تعداد نتایج: 184647  

Journal: :Bioinorganic Chemistry and Applications 2005
M. Laura López J. L. Gardea-Torresdey J. R. Peralta-Videa G. de la Rosa V. Armendáriz I. Herrera H. Troiani J. Henning

Heavy metals from mining, smelting operations and other industrial processing facilities pollute wastewaters worldwide. Extraction of metals from industrial effluents has been widely studied due to the economic advantages and the relative ease of technical implementation. Consequently, the search for new and improved methodologies for the recovery of gold has increased. In this particular resea...

Journal: :Frontiers in Earth Science 2023

Introduction: The Saibagou gold deposit, located in the eastern part of tectonic belt northern Qaidam Basin western China, has its ore bodies strictly controlled by regional fault system. Despite this understanding, there remain controversies surrounding deposit’s metallogenic epochs, sources ore-forming materials, and properties fluids. To address these controversy, process deposit can be furt...

Journal: :Mineralium Deposita 2021

Abstract Studies of populations gold particles are becoming increasingly common; however, interpretation compositional data may not be straightforward. Natural is rarely homogenous. Alloy heterogeneity present as microfabrics formed either during primary mineralization or by modification pre-existing alloys chemical and physical drivers subsequent residence in hypogene surficial environments. I...

Journal: :geopersia 2012
behzad mehrabi ebrahim tale fazel maryam shahabifar

the muteh gold deposit (ne of golpaygan) in the central part of intrusive-metamorphic belt of sanandaj-sirjan zone comprises nw-se trending gold-quartz vein occurred in metamorphic complex. gold mineralization is associated with quartz veins that formed during regional deformation across the mylonitic zones in metamorphic rocks of predominantly meta-volcanic, gneiss and schist. the sulfidation ...

Journal: Geopersia 2012
Behzad Mehrabi Ebrahim Tale Fazel Maryam Shahabifar

The Muteh gold deposit (NE of Golpaygan) in the central part of intrusive-metamorphic belt of Sanandaj-Sirjan zone comprises NW-SE trending gold-quartz vein occurred in metamorphic complex. Gold mineralization is associated with quartz veins that formed during regional deformation across the mylonitic zones in metamorphic rocks of predominantly meta-volcanic, gneiss and schist. The sulfidation ...

سیاه چشم , کمال, حسین زاده, محمد رضا , فردوسی, رسول , کلاگری, علی اصغر ,

The Astarghan copper-gold deposit is located about 50 km north of Tabriz, southeast of  Kharvana, East-Azarbaidjan. The most important lithologic units in the area are a hypabyssal prophyritic granodioritic intrusive stock (Oligo-Miocene) and flysch-type sedimentry sequence consisting of limestone, limy sandstone and marl (Paleocene-Eocene). The plagioclases range in composition from oligoclase...

Journal: :Minerals 2023

The Bodaibo gold-bearing district in the Lena gold province of Siberia is one largest and oldest placer provinces world. Approximately 1650 tons has been extracted from region. Precise studies on source these unique deposits are lacking still controversial. Native four different locations was gathered to investigate its morphology, chemical signatures, structure inclusions. Some data primary be...

Journal: :Biosensors & bioelectronics 2013
Guillaume Suárez Christian Santschi Olivier J F Martin Vera I Slaveykova

A novel third generation biosensor was developed based on one-shot adsorption of chemically-modified cytochrome c (cyt c) onto bare gold electrodes. In contrast to the classic approach which consists of attaching cyt c onto an active self-assembled monolayer (SAM) priory chemisorbed on gold, here short-chain thiol derivatives (mercaptopropionic acid, MPA) were chemically introduced on cyt c pro...

Journal: :Materiali in Tehnologije 2021

In the Buchim porphyry copper deposit, we determined several representative rare mineral phases, comprising metals from gold-palladium group as well those bismuth-selenium (Cu-Bi-Se-Te-As) group. The phases are represented by new in bismuthinite, galenobismutite, krupkaite, friedrichite, emplectite, laitakarite and native bismuth of gold-palladium, including gold palladium with their elemental ...

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