The Sungun porphyry copper deposit is located in northwestern Iran and is associated with diorite/granodiorite to quartz-monzonite of Miocene age, which intruded Eocene volcanosedimentary and Cretaceous carbonate rocks. Copper mineralization was accompanied by both potassic and phyllic alteration. Three main mineralization related alteration episodes (potassic, transition, and phyllic alteratio...

Brambang is one of the porphyry copper-gold prospects/deposits situated along eastern Sunda arc. This study aimed to understand geological framework, alteration geochemistry and ore fluid characteristics prospect. Fieldworks various laboratory analyses were performed including petrography, microscopy, rock geochemistry, chlorite chemistry inclusion microthermometry. The prospect composed andesi...

introduction the study area is located in central part of the khaf- kashmar-bardeskan belt which is volcano-plutonic belt at the north of the dorouneh fault in the north of lut block. the north of the lut block is affected by tectonic rotation and subduction processes which occur in the east of iran (tirrul et al., 1983). the magmatism of lut block begins in jurassic and continues in tertiary (...

The Sedemte Prestola pluton is an intermediate to acid plutonic body of Variscan age (308.7 ± 9.1 Ma). Despite its small size, several petrographic varieties are present: syenites, quartzsyentes and granites. It composed potassium feldspar, quartz, sodic-calcic amphibole; biotite, when present, often rimmed by amphibole or strongly altered; zircon, titanite, apatite ilmenite the accessory phase...

The Sungun porphyry copper deposit that intruded Eocene volcano sedimentary and Cretaceous carbonate rocks hosted by a diorite/granodioritic to quartzmonzonitic stock. Copper mineralization is essentially associated more with potassic and less phyllic alteration. Therefore separating these two kinds of alteration is so important. In this paper, by applying the discriminant, it was attempt to se...

Understanding the development of calcic and petrocalcic horizons is important for palaeoclimate reconstruction. The micromorphology and geochemistry of Quaternary calcic and petrocalcic horizons formed in the area around Coimbatore, Tamil Nadu are discussed. The calcic horizons represent the Bk horizons that occur as thick complex profiles ( 300 cm thick) in the foothill regions while the lamin...

The Upper Jurassic Mantos Blancos copper deposit (500 Mt at 1.0% Cu), located in the Coastal Range of northern Chile, displays two superimposed hydrothermal events. An older phyllic alteration probably related to felsic magmatic–hydrothermal brecciation at ∼155 Ma, and younger (141–142 Ma) potassic, propylitic, and sodic alterations, coeval with dioritic and granodioritic stocks and sills, and ...

The Rb-Sr whole-rock isochron, age 1636 ± 66 Ma of Mirgarani granite, is the one oldest granite dated in northwestern part Chhotanagpur Granite Gneiss Complex (CGGC). initial Sr ratio 0.715 0.012 (MSWD = 0.11), showing an S-type affinity. has intruded migmatite complex Dudhi Group and forms formation comparable to granites Bihar Mica Belt around Hazaribagh (1590 30 Ma). present studies have est...