نتایج جستجو برای: alteration zones

تعداد نتایج: 90915  

Journal: :Journal of Structural Geology 2022

Early stages of normal fault growth are seldom described using field observations active faults. Here we first estimate the displacements border and intrarift faults in Zomba Graben low extension (< 10 %) Malawi Rift, then quantify micro-to macroscale damage mineralisation associated with their surface exposures. The 22 km long Mlunguzi 39 Chingale Step have zones 4–52 m wide. In contrast, zone...

Journal: :Minerals 2022

Revealing prospective locations of hydrothermal alteration zones (HAZs) is an important technique for mineral prospecting. In this study, we used multiple criteria inferred from Landsat-8 OLI, Sentinel-2, and ASTER data using a GIS-based weighted overlay multi-criteria decision analysis approach to build model the delineating deposits in Khnaiguiyah district, Saudi Arabia. The utilized algorith...

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 ...

In this work, we focus on investigating the Quickbird and Landsat-8 datasets for mapping hydrothermal and gossans alterations in reconnaissance porphyry copper mineralization in the Babbiduyeh area. This area is situated in the Central Iranian Volcano-sedimentary Complex, where large copper deposits like Sarcheshmeh as well as numerous occurrences of copper exist. The alteration zones are discr...

مؤید, محسن, حسین‌زاده, قادر , مقدمی, اسلام ,

The study area is located about 20 km north-west of Hashjin, SW of Ardebil Province and is a part of Kejal-Shamsabad zone in the Tarom-Hashjin volcanic belt. Zeolite and associated minerals, such as quartz and calcite, are formed in cavities and fractures of trachy-andesitic country rock. Studies of zeolitic alteration zones show that stilbite is the main mineral and illite, sanidine, chlorite,...

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: :Minerals 2022

The Jiaodong Peninsula hosts the main large gold deposits and was first production area in China; multisource multiscale geoscience datasets are available. is biggest drilling mineral-exploration zone China. This study used three-dimensional (3D) modeling, geology, ore body alteration to extract synthesize mineralization information analyze exploration targeting Zhaoxian deposit northwestern Pe...

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