نتایج جستجو برای: cu deposits

تعداد نتایج: 89318  

1999
Z. L. Wang J. E. Tkaczyk J. A. Sutliff J. A. DeLuca

A possible microstructural origin of the high critical current densities which have been obtained in c-axis-aligned, polycrystalline TlBa&a,Cu,Os +x deposits has been identified. The results of x-ray diffraction determinations of basal plane texture of Tl-1223 deposits prepared by spray pyrolysis are observed to depend on the size of the x-ray beam. Furthermore, most grain boundaries were found...

Journal: :Minerals 2022

The Paraíba is an Au-Cu-Mo deposit located in the southern part of Amazon Craton, Alta Floresta Mineral Province, Mato Grosso State, Brazil. It composed Au-Cu-bearing quartz veins and Cu-Mo-rich hydrothermal breccias stockworks, both associated with several alteration zones. integration spectral (reflectance imaging spectroscopy) conventional techniques (core logging, petrography, mineral chemi...

2015
Taeyoon Kim G. Liu Marta Boaro John M. Vohs

The formation and removal of the carbonaceous deposits formed by n-butane and liquid hydrocarbons, such as n-decane and proprietary light and heavy naphthas, between 973 and 1073 K on YSZ and ceria-YSZ, has been studied to determine conditions for stable operation of direct-utilization SOFC. First, it is shown that deactivation of SOFC with Cu-ceria-YSZ anodes operating on undiluted n-decane, a...

2004
Mark D. Barton David A. Johnson

Recognizing footprints of Fe-oxide(-Cu-Au) ("IOCG") mineralization depends on the perspective that the beholder has on the nature and origin of these deposits. This follows from the fact that no simple descriptive model can adequately capture the diversity of the systems that are included in this family (any more than for epithermal deposits or similar broad classes). Nor, is there any semblanc...

2018
Yang Li David Selby Xian-Hua Li Chris J. Ottley

Stratabound deposits within late Carboniferous carbonate units in the Middle–Lower Yangtze River metallogenic belt are important copper producers in China. Hitherto, the genesis of these deposits has been debated, due to poor constraints regarding the timing and source of the mineralization. Proposed models include a late Carboniferous seafloor exhalative formation (SEDEX), or an Early Cretaceo...

Journal: :زمین شناسی اقتصادی 0
فرید مر صالح دیمر بتول تقی پور

most skarn deposits are directly related to magmatic activity, and there is a systematic correlation between composition of causative plutons and the metal contents of the related skarns. darreh zerreshk deposit is located in southwest of yazd. petrological and geochemical studies show that darreh zerreshk granitoid ranges in composition from granite through quartz monzodiorite and has subalkal...

رزم‌آرا, مرتضی ,

The ABS2 sulphides (A=Cu, or Ag), B=As, Sb, Bi) are a naturally occurring group of minerals, typically found in polymetallic vein deposits. Behind chemically simple, the minerals have a complex structure and undergo several temperature/composition phase transitions. In this study, synchrotron radiation is used to collect Ag, As, Bi, Cu, Cd, Hg and Sb K-edge EXAFS data from a series of synthetic...

Journal: :Environmental research & technology 2021

Construction of civil engineering structures on weak soil without taking necessary precautions may be risky. Alluvial that has not completed its geological formation a high void ratio and contains organic material therefore, the strength properties these soils should examined carefully. In this study, undrained shear (cu) behavior natural polypropylene (PP) fiber-reinforced alluvial clays was i...

Journal: :Frontiers in Earth Science 2023

The Kalmakyr deposit in Uzbekistan is one of the world’s largest gold-rich porphyry Cu deposits, and mineralization was proposed to be closely associated with emplacement latest intrusive phases, that is, granodiorite porphyry. However, it still unclear which features these ore-bearing intrusions are crucial for enormous metal enrichment how they correlate magmatic fertility. In this study, we ...

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