نتایج جستجو برای: porphyry copper unit

تعداد نتایج: 475413  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1385

چکیده ندارد.

Journal: :int. journal of mining & geo-engineering 2012
hassan rezaee omid asghari

due to substantial effect of classification of resource models on future mine planning, one should come with an accurate method of estimation to guarantee that the minimum error is acquired in the estimation process. the known world class cu-mo deposit, sarcheshmeh porphyry deposit (central iran) selected as the study area. the hypogene zone of the deposit was chosen as the space in which estim...

2007

The surface geochemistry techniques widely employed during the 1960’s to 1980’s are effective at discovering near-surface deposits, but are largely ineffective for exploring under deep cover or for deep extensions of known mineralisation in a near-mine environment. Instead, mineral explorers must focus their attention on rapidly aggregating and synthesising disparate data to build into holistic...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان 1388

copper extraction from heap 3 low grade ore at sarchechmeh is limited due to its mixed composition (copper oxide and sulphide minerals). changing this heap to a bioheap could improve the copper recovery.

Journal: :Earth and Planetary Science Letters 2022

Porphyry Cu–Au deposits are the major global source of copper, an essential metal for green transition, and a significant gold. They occur both in thick continental thin oceanic arcs at depths between ∼1 ∼6 km above parental magma chambers situated ∼5–15 depth. Although it is believed that precipitation processes these same arcs, not clear why porphyry two environments display different Cu Au e...

روحبخش, پیام, ملک‌زاده شفارودی, آزاده, کریم‌پور, محمدحسن,

The Kuh Zar Au-Cu deposit is located about 100 km southeast of Damaghan city. Structurally, this area is part of the Alborz Magmatic Assemblage (AMA). The oldest rock units in the Firuzeh-Gheychi area consists of syenogranite and tourmaline biotite granodiorite units. These units were intruded by quartz monzonite porphyry stocks. Pyroxene diorite porphyry and hornblende diorite porphyry are you...

2001
JEREMY P. RICHARDS ADRIAN J. BOYCE MALCOLM S. PRINGLE

A program of geologic mapping and lithogeochemical and geochronological sampling has been carried out over a 745-km area of the Atacama Desert surrounding the porphyry Cu deposits at Escondida, Zaldívar, and Chimborazo (Cordillera de Domeyko, northern Chile). The purpose of this study was to examine the regional tectonic and magmatic setting of this preeminent porphyry Cu district for evidence ...

2002
Anthony C. Harris Suzanne D. Golding

The phyllic alteration in a number of circum-Pacific porphyry Cu-Au deposits is related to high-temperature saline magmatic fluids. This contradicts the widely used genetic models wherein phyllic alteration formed as the result of mixing between magmatic and meteoric fluids. At the Endeavour 26 North porphyry deposit in eastern Australia, the transition from early potassic to the main-stage phy...

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