Surface deformation and Salt budget of an active salt fountain, Finu in the Zagros mountains, Iran, using persistent scatterer interferometry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F25%3A00639919" target="_blank" >RIV/67985530:_____/25:00639919 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/25:10510330

Výsledek na webu

<a href="https://pubs.geoscienceworld.org/gsw/lithosphere/article/2025/3/lithosphere_2024_216/660581/Surface-Deformation-and-Salt-Budget-of-an-Active" target="_blank" >https://pubs.geoscienceworld.org/gsw/lithosphere/article/2025/3/lithosphere_2024_216/660581/Surface-Deformation-and-Salt-Budget-of-an-Active</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2113/2025/lithosphere_2024_216" target="_blank" >10.2113/2025/lithosphere_2024_216</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Surface deformation and Salt budget of an active salt fountain, Finu in the Zagros mountains, Iran, using persistent scatterer interferometry

Popis výsledku v původním jazyce

In subaerial salt diapirs, salt buoyancy drives the vertical flow of salt in the feeder, salt extrusion, and gravity spreading on the surface. The shape of these diapirs is controlled by the balance between buoyancy forces, gravity spreading on the surface, and surface dissolution of the salt. While salt dissolution is a surface process that can be directly observed, the rate of salt supply from depth is more difficult to constrain. In this study, we mapped the surface deformation of the Finu salt fountain in the Zagros Mountains of Iran using Persistent Scatterer Interferometry (PSI) of Sentinel-1 SAR data from 2014 to 2018 and calculated the volume change over this period. The observed deformation signal indicates uplift at the central dome and outward spreading at the flanks. Our PSI time series shows no correlation between these surface motions and variations in temperature and precipitation, indicating that the deformation is primarily driven by internal salt dynamics. The extracted 2D velocity vectors along an east-west (E-W) trending swath profile across the diapir vary in magnitude with distance from the diapir center and with local slope, reflecting both salt supply from the subsurface and its gravity spreading. The 2D displacements reveal a change in cross-sectional area along this profile of +9.80 +/- 0.97 m(2)/y. Integrating this value over the diapir's extent yields a total volume change of +38.3 +/- 3.8 x 10(3) m(3)/y. Using plausible estimates for salt dissolution rates, we estimated a total salt flux of 146.2 +/- 3.8 x 10(3) m(3)/y, corresponding to extrusion from a 1.7 km diameter feeder at an average rate of 64 +/- 2 mm/y. This study quantifies the salt supply in an axisymmetric salt fountain based on surface deformation data. Our findings improve the understanding of salt-spreading mechanisms and contribute to more accurate assessments of salt budgets in diapiric systems.

Název v anglickém jazyce

Surface deformation and Salt budget of an active salt fountain, Finu in the Zagros mountains, Iran, using persistent scatterer interferometry

Popis výsledku anglicky

In subaerial salt diapirs, salt buoyancy drives the vertical flow of salt in the feeder, salt extrusion, and gravity spreading on the surface. The shape of these diapirs is controlled by the balance between buoyancy forces, gravity spreading on the surface, and surface dissolution of the salt. While salt dissolution is a surface process that can be directly observed, the rate of salt supply from depth is more difficult to constrain. In this study, we mapped the surface deformation of the Finu salt fountain in the Zagros Mountains of Iran using Persistent Scatterer Interferometry (PSI) of Sentinel-1 SAR data from 2014 to 2018 and calculated the volume change over this period. The observed deformation signal indicates uplift at the central dome and outward spreading at the flanks. Our PSI time series shows no correlation between these surface motions and variations in temperature and precipitation, indicating that the deformation is primarily driven by internal salt dynamics. The extracted 2D velocity vectors along an east-west (E-W) trending swath profile across the diapir vary in magnitude with distance from the diapir center and with local slope, reflecting both salt supply from the subsurface and its gravity spreading. The 2D displacements reveal a change in cross-sectional area along this profile of +9.80 +/- 0.97 m(2)/y. Integrating this value over the diapir's extent yields a total volume change of +38.3 +/- 3.8 x 10(3) m(3)/y. Using plausible estimates for salt dissolution rates, we estimated a total salt flux of 146.2 +/- 3.8 x 10(3) m(3)/y, corresponding to extrusion from a 1.7 km diameter feeder at an average rate of 64 +/- 2 mm/y. This study quantifies the salt supply in an axisymmetric salt fountain based on surface deformation data. Our findings improve the understanding of salt-spreading mechanisms and contribute to more accurate assessments of salt budgets in diapiric systems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GC20-18647J" target="_blank" >GC20-18647J: Vliv caprocku na dynamiku růstu solných těles v Iránu</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Lithosphere

ISSN

1941-8264

e-ISSN

1947-4253

Svazek periodika

2025

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

13

Strana od-do

216

Kód UT WoS článku

001583616400001

EID výsledku v databázi Scopus

2-s2.0-105030080072