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Ore-forming mechanism and its relationship with deformational and metamorphic episodes at Haimur gold mine, Nubian Shield, Egypt

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00124577" target="_blank" >RIV/00216224:14310/21:00124577 - isvavai.cz</a>

  • Result on the web

    <a href="https://www.cambridge.org/core/journals/geological-magazine/article/oreforming-mechanism-and-its-relationship-with-deformational-and-metamorphic-episodes-at-haimur-gold-mine-nubian-shield-egypt/4B951A9EC49F309AAE5CAB033D4C7472" target="_blank" >https://www.cambridge.org/core/journals/geological-magazine/article/oreforming-mechanism-and-its-relationship-with-deformational-and-metamorphic-episodes-at-haimur-gold-mine-nubian-shield-egypt/4B951A9EC49F309AAE5CAB033D4C7472</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1017/S0016756820000655" target="_blank" >10.1017/S0016756820000655</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Ore-forming mechanism and its relationship with deformational and metamorphic episodes at Haimur gold mine, Nubian Shield, Egypt

  • Original language description

    The Haimur area represents the central part of the Wadi Allaqi region in the southern block of the Egyptian Eastern Desert near Nasser Lake and the Nile valley. It is made up of ophiolitic assemblage comprising serpentinite and talc carbonate, listwenite, metagabbro/amphibolite and metabasalt and island arc assemblages. The orogenic gold deposits in the Haimur area occur in the form of smoky/white sulphide-bearing quartz / quartz-carbonate veins or lenses cutting through the listwenite zone-related rocks. The NE-trending auriferous veins were formed due to an extensional to transtensional shearing related to NW Najd shear tectonics. Gold was observed in association with late-pyrite and chalcopyrite paragenetically formed in the gold phase (second phase), while the first phase is the sulphide phase including early-pyrite and arsenopyrite. Arsenopyrite was formed during early metamorphic recrystallization at a high-temperature range between 405 and 512 °C. However, gold was formed at lower temperature through retrograde metamorphism. Three types of fluid inclusions have been recognized: aqueous (type-I), mixed aqueous–carbonic (type-II) and hydrocarbonic (type-III). The P–T conditions of trapping were obtained from the isochore lines of intersection between T = 300–320 °C and pressure range of 60–180 MPa. The Haimur gold deposit was supposed to be derived from metamorphic fluids created by dehydration and decarbonation of ophiolitic mélange assemblages and volcano-sedimentary rocks, in which the gold was transported as Au(HS)2– complexes and precipitated in reduced environment. The strong linkage between the deformation and metamorphism triggered gold deposition in structurally favourable sites related to the Najd fault system.

  • 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

    S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2021

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Geological Magazine

  • ISSN

    0016-7568

  • e-ISSN

    1469-5081

  • Volume of the periodical

    158

  • Issue of the periodical within the volume

    3

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    19

  • Pages from-to

    518-536

  • UT code for WoS article

    000617280900009

  • EID of the result in the Scopus database

    2-s2.0-85088537543