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Ore Controls and Metallogenesis of Au-Ag Deposits at Atalla Mine, Central Eastern Desert of Egypt

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00117261" target="_blank" >RIV/00216224:14310/20:00117261 - isvavai.cz</a>

  • Result on the web

    <a href="https://doi.org/10.1111/1755-6724.14326" target="_blank" >https://doi.org/10.1111/1755-6724.14326</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1111/1755-6724.14326" target="_blank" >10.1111/1755-6724.14326</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Ore Controls and Metallogenesis of Au-Ag Deposits at Atalla Mine, Central Eastern Desert of Egypt

  • Original language description

    Gold-silver deposits in the Atalla area occur as hydrothermal quartz veins in NE-SW pre-existing fractures within the Atalla granitic pluton. The orientation of such quartz veins has been attributed to extensional behavior related to the Atalla Shear Zone (ASZ). The Atalla area is covered by a variety of lithologies that are (from oldest to youngest): metasedimentary rocks, metavolcanic rocks, ophiolite assemblage (serpentinites/talc-carbonates), Atalla granite and Dokhan volcanic rocks. Microscopically, Atalla granite ranges in composition from granodiorite to monzogranite. Whole-rock geochemistry constrains the calc-alkaine affinity of the Atalla granite that was intruded within an orogenic (syncollision) tectonic regime. The ore minerals are represented by gold/silver (electrum), pyrite (Py-1 &amp; Py-2), arsenopyrite, pyrrhotite, sphalerite, chalcopyrite, galena, covellite and goethite. The temperature of ore formation ranges from 240 to 285 degrees C and the estimated fluid pressure is in the range of 20-100 MPa. Based on the geological setting, ore textures and fluid characteristics; the Atalla Au-Ag deposits are considered to be orogenic in nature, formed from a continental collision (similar to 653-590 Ma), synchronous with the emplacement of calc-alkaline magmatism during the evolutionary history of the Arabian Nubian Shield (ANS). The initial ore-forming fluid was primarily derived from a metamorphic source related to ophiolitic-serpentinite rocks under deep regional conditions of greenschist-amphibolite facies, where the Atalla granitic eruption provided the required temperature conditions for the metamorphic process to take place. Under such conditions, the transportation of ore metals as bisulfide complexes is favoured. The deposition of ore minerals was triggered by fluid-wallrock interaction through fracture pathways in conjunction with a temperature-pressure drop that is likely to have been related to uplift into the crustal levels.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10505 - Geology

Result continuities

  • Project

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Acta Geologica Sinica - English Edition

  • ISSN

    1000-9515

  • e-ISSN

    1755-6724

  • Volume of the periodical

    94

  • Issue of the periodical within the volume

    5

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    20

  • Pages from-to

    1451-1470

  • UT code for WoS article

    000585902600010

  • EID of the result in the Scopus database

    2-s2.0-85091723402