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Composition and deformation patterns of the caprock on salt extrusions in southern Iran - Field study on the Karmostaj and Siah Taq diapirs

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F21%3A00546423" target="_blank" >RIV/67985530:_____/21:00546423 - isvavai.cz</a>

  • Alternative codes found

    RIV/00025798:_____/21:00000197 RIV/00216208:11310/21:10438764

  • Result on the web

    <a href="https://www.sciencedirect.com/science/article/abs/pii/S0191814121001462" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0191814121001462</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1016/j.jsg.2021.104422" target="_blank" >10.1016/j.jsg.2021.104422</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Composition and deformation patterns of the caprock on salt extrusions in southern Iran - Field study on the Karmostaj and Siah Taq diapirs

  • Original language description

    Two iconic salt diapirs in the Zagros Mountains in Iran – Karmostaj (Gach) and Siah Taq – are regarded as world-class examples of salt extrusions and are frequently called salt glaciers. However, our field survey revealed that their glacier-like parts are formed by thick, variegated and deformed caprock, only locally mixed with salt. Caprock is a layer of insoluble residuum that consists primarily of dissolution breccia and gypsum surrounding blocks of non-halite lithologies of the original evaporite sequence. Deformation within the caprock was accommodated primarily by shearing along gypsum-rich zones (gypsum mylonites) that surround subdomains of dissolution breccia and folded and fragmented blocks of carbonates and siliciclastics. Ductile flow in these mylonite shear zones was accommodated by pressure solution-precipitation creep of the lath-shaped gypsum grains. The ductile shearing of gypsum was locally accompanied by increased fluid-pore pressure driven fracturing of the surrounding lithologies. Since the subsurface shape of the salt diapirs is unknown, we present three hypothetical scenarios trying to explain the extrusion process of the studied diapirs and the associated deformation history of their caprocks. The diapiric structures represent either, 1) the remnants of degraded paleoglaciers, 2) advancing salt extrusions, or 3) only slightly reactivated, wide diapirs. To test these hypothetical scenarios, a geophysical survey is required to gain insights into the subsurface structures of the exposed diapirs and salt sheets.

  • 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

    <a href="/en/project/GC20-18647J" target="_blank" >GC20-18647J: Influence of caprock on the growth dynamics of salt diapirs in Iran</a><br>

  • Continuities

    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

    Journal of Structural Geology

  • ISSN

    0191-8141

  • e-ISSN

    1873-1201

  • Volume of the periodical

    151

  • Issue of the periodical within the volume

    October

  • Country of publishing house

    GB - UNITED KINGDOM

  • Number of pages

    20

  • Pages from-to

    104422

  • UT code for WoS article

    000692112300001

  • EID of the result in the Scopus database

    2-s2.0-85111918627