Jahani salt diapir, Iran: Hydrogeology, karst features and effect on surroundings environment

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F17%3A00480740" target="_blank" >RIV/67985831:_____/17:00480740 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/17:10369532

Result on the web

<a href="http://dx.doi.org/10.5038/1827-806X.46.3.2133" target="_blank" >http://dx.doi.org/10.5038/1827-806X.46.3.2133</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5038/1827-806X.46.3.2133" target="_blank" >10.5038/1827-806X.46.3.2133</a>

Result language

angličtina

Original language name

Jahani salt diapir, Iran: Hydrogeology, karst features and effect on surroundings environment

Original language description

The Jahani Salt Diapir (JSD), is an active diapir in the Simply Folded Belt of the Zagros Orogeny, in the south of Iran. The hydrogeology, schematic model of flow direction and hydrochemical effects of the JSD on the adjacent water resources are lacking, and thus, are the focus of this study. The morphology of the JSD was reevaluated by fieldwork and using available maps. The physicochemical characteristics of the springs and hydrometric stations were also measured. The vent of the diapir is located 250 m higher than the surrounding glaciers, and covered by small polygonal sinkholes (dolines). The glacier is covered by cap soils, sparse trees and pastures, and contains large sinkholes, numerous shafts, several caves, and 30 brine springs. Sub-horizontal or inclined stream passages following the surface valleys and vertical shafts (with short inlet caves) at the bottoms of nearly circular blind valleys. Salt exposure is limited to steep slopes. The controlling variables of flow route within salt diapirs are the negligible porosity of the salt rocks at depth more than about ten meters below the ground surface and the rapid halite saturation along the flow route. These mechanisms prevent deep cave development and enforce the emergence points of brine springs with low flow rates and small catchment area throughout the JSD and above the local base of erosion. The type of spring water is sodium chloride, with a TDS of 320 g/l, and saturated with halite, gypsum, calcite and dolomite. The water balance budget of the JSD indicates that the total recharge water is 1.46 MCM (million cubic meter)/a, emerges from 30 brine springs, two springs from the adjacent karstic limestone, and flows into the Firoozabad River (FR) and the adjacent alluvium aquifer. The FR cuts through the northern margin of the salt diapir, dissolving the glacier salts at the contact with JSD and increasing significantly the halite concentration.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GA16-19459S" target="_blank" >GA16-19459S: Effect of gravity-induced stress on sandstone erosion: physical and numerical modelling</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

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

Name of the periodical

International Journal of Speleology

ISSN

0392-6672

e-ISSN

—

Volume of the periodical

46

Issue of the periodical within the volume

3

Country of publishing house

IT - ITALY

Number of pages

13

Pages from-to

445-457

UT code for WoS article

000413996400010

EID of the result in the Scopus database

2-s2.0-85031301548