Impact of salt diapir geometry and caprock composition on gravity survey results
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F24%3A00588376" target="_blank" >RIV/67985530:_____/24:00588376 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/24:10484087
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0191814124001664?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0191814124001664?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jsg.2024.105214" target="_blank" >10.1016/j.jsg.2024.105214</a>
Alternative languages
Result language
angličtina
Original language name
Impact of salt diapir geometry and caprock composition on gravity survey results
Original language description
With respect to difficulties seismic and magnetotellurics may have in accurate definition of exact salt diapir geometry, we performed various gravity simulations and calculations to investigate such exploration targets. Our motivation included the fact that not much has been done on caprock impact on the gravity signal. A very significant favorable condition is the high contrast of rock density between salt and basin sedimentary formations, especially carbonates. However, this can be more complicate if caprock formation is present. Therefore we defined approximate bulk density of typical caprock formation based on its usual composition, resulting in density values 2.45–2.70 g/cm3.nWe modelled by forward and inverse procedures the gravity signal Gz of salt diapirs with caprock of variable thickness to demonstrate to which extent the salt diapir negative gravity anomaly may be reduced by the impact of caprock formation. In the tested cases the gravity anomaly was reduced by more than 30% depending on respective caprock composition and thickness. Significant contribution to the delineation of salt diapirs themselves, as well as diapirs hidden under caprock, came from the application of horizontal gravity gradients Gzx. We showed the difference of Gzx spikes indicating the edges of density contacts according to the type of gravity survey – land or airborne. It was also proved by calculating the gravity effect of laboratory analogue models of salt deformation and extrusion. We demonstrated that gravity is still a valuable and relatively cheap tool for in-detail investigations of the salt structures within exploration projects.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10507 - Volcanology
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
2024
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
186
Issue of the periodical within the volume
Sept.
Country of publishing house
GB - UNITED KINGDOM
Number of pages
10
Pages from-to
105214
UT code for WoS article
001287446700001
EID of the result in the Scopus database
2-s2.0-85200136822