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