LOCALIZATION OF CONCENTRIC RING FAULTS IN SEDIMENTS OVERLYING EVAPORITE SEQUENCES DURING ACTIVE SALT DIAPIR EMPLACEMENT: INSIGHTS FROM NUMERICAL MODELING

AbstractA geomorphic investigation of the Salinas de Oro salt diapir in the Pyrenees reveals that the ring fracture pattern related to the karstic collapse of the diapir crest may vary significantly depending on the rates of dissolution and salt flow, and the rheology of the overburden. The salt diapir has well-developed concentric faults related to salt dissolution subsidence throughout the Quaternary. Roof strata accommodate subsidence by a combination of downward sagging and brittle collapse leading to the development of a ring monocline that is broken by 5 to 20 m throw conjugated normal faults and a 40 m throw, 9.5-km-long and 200-m-wide keystone graben. The salt diapir top has >100-m-long sinkholes that coalesce to form hollows >70 m deep. Up to 3-km-long radial grabens with a 70 to 90 m vertical throw overprint concentric-ring faulting and displace Quaternary deposits demonstrating active salt flow and diapir rise. Radial faults are linked with salt-withdrawal faults of the Andia Fault Zone (AFZ). Salt flow from the AFZ into the Salinas de Oro salt diapir causes brittle gravitational extension of limestone strata leading to a sequence of grabens and Quaternary faults >10 km long and several hundred meters deep.

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Development of banded terrain in an active salt diapir: potential analog to Mars

Geomorphology ◽

10.1016/j.geomorph.2021.107824 ◽

2021 ◽

pp. 107824

Author(s):

Amos Frumkin ◽

Shachak Pe’eri ◽

Israel Zak

Keyword(s):

Salt Diapir ◽

Active Salt

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Discrete element modeling of the faulting in the sedimentary cover above an active salt diapir

Journal of Structural Geology ◽

10.1016/j.jsg.2008.10.007 ◽

2009 ◽

Vol 31 (9) ◽

pp. 989-995 ◽

Cited By ~ 14

Author(s):

Hongwei Yin ◽

Jie Zhang ◽

Lingsen Meng ◽

Yuping Liu ◽

Shijing Xu

Keyword(s):

Sedimentary Cover ◽

Discrete Element ◽

Salt Diapir ◽

Discrete Element Modeling ◽

Element Modeling ◽

Active Salt

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Sand remobilization and injection above an active salt diapir: the Tyr sand of the Nini Field, Eastern North Sea

Basin Research ◽

10.1111/j.1365-2117.2010.00480.x ◽

2010 ◽

Vol 22 (4) ◽

pp. 548-561 ◽

Cited By ~ 15

Author(s):

Johan Byskov Svendsen ◽

Henrik Juhl Hansen ◽

Thomas Staermose ◽

Michael Kragh Engkilde

Keyword(s):

North Sea ◽

Salt Diapir ◽

Active Salt

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A PONDED BASIN FLOOR FAN OUTCROP ANALOGUE: BUNKERS SANDSTONE, NORTHERN FLINDERS RANGES, AUSTRALIA

The APPEA Journal ◽

10.1071/aj02028 ◽

2003 ◽

Vol 43 (1) ◽

pp. 537 ◽

Cited By ~ 4

Author(s):

M.R.W. Reilly ◽

S.C. Lang

Keyword(s):

Gamma Ray ◽

South Australia ◽

Salt Diapir ◽

Log Analysis ◽

Data Set ◽

Flinders Ranges ◽

Active Salt ◽

Basin Floor ◽

High Degree ◽

Gamma Ray Log

The Donkey Bore Syncline in the Northern Flinders Ranges of South Australia contains a generally finegrained deepwater succession of Early Cambrian age (Bunkers Sandstone) that outcrops on three sides of a syncline and flanks an active salt diapir to the east (Wirrealpa Diapir). Within the succession lies a basal sand-prone interval interpreted as a basin floor fan (BFF) ponded within a mini-basin on a topographically complex slope.The BFF comprises over 30 m of section with deposits that are dominantly massive clean sandstone beds (0.1– 3 m thick) that are stacked or interbedded with siltstones and pinch out along strike.Eight stratigraphic sections and accompanying spectral gamma ray logs (using a hand held scintillometer) were measured through the BFF. Using spectral gamma ray log analysis combined with stratigraphic logs, four alternative correlation panels were constructed.Quantitative analysis of sand-prone intervals interpreted in each of the panels provided data on the vertical and horizontal connectivity within the BFF as different correlation methods were explored and the geological model improved. Quantitative analysis of vertical and horizontal connectivity values indicates a high degree of heterogeneity within the BFF, with poor–moderate vertical connectivity, with individual beds rarely correlating >500 m along strike. This heterogeneity is poorly resolved using conventional wireline log suites, but is greatly improved if spectral gamma ray logs are used (especially Thorium).The data set provides a high-resolution analogue for understanding the internal architecture of deepwater hydrocarbon reservoirs.

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Prediction of LPCVD silicon film microstructure from local operating conditions using numerical modeling

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:1999822 ◽

1999 ◽

Vol 09 (PR8) ◽

pp. Pr8-181-Pr8-188 ◽

Cited By ~ 1

Author(s):

A. Dollet ◽

B. Caussat ◽

J. P. Couderc

Keyword(s):

Numerical Modeling ◽

Silicon Film ◽

Operating Conditions ◽

Film Microstructure

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Investigation of Morphosedimentary Processes on a Schematic Louisiana Barrier Island Using Process-Based Numerical Modeling

Coastal Sediments '07 ◽

10.1061/40926(239)51 ◽

2007 ◽

Author(s):

T. Campbell ◽

B. de Sonneville ◽

L. Benedet ◽

D. J. W. Walstra ◽

C. W. Finkl

Keyword(s):

Numerical Modeling ◽

Barrier Island

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Numerical Modeling of Hurricane-Induced Extreme Wave Heights in Pensacola Bay

Coastal Hazards ◽

10.1061/9780784412664.007 ◽

2013 ◽

Author(s):

Wenrui Huang ◽

Yuan He ◽

Shuguang Liu

Keyword(s):

Numerical Modeling ◽

Extreme Wave ◽

Wave Heights

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SIMULATION OF ELECTRICAL MONITORING OF DAMS WITH LEAKAGE WITH A TRANSVERSE PLACEMENT OF THE MEASURING INSTALLATION

Eurasian Journal of Mathematical and Computer Applications ◽

10.32523/2306-6172-2020-8-4-69-82 ◽

2020 ◽

Vol 8 (4) ◽

pp. 69-82

Author(s):

D.S. Rakisheva ◽

◽

B.G. Mukanova ◽

I.N. Modin ◽

◽

...

Keyword(s):

Numerical Modeling ◽

Water Level ◽

Electrical Resistivity Tomography ◽

Resistivity Tomography ◽

Measuring Installation ◽

Basic Functions ◽

Tomography Method ◽

Dam Monitoring ◽

The Mathematical Model ◽

Measurement Line

Numerical modeling of the problem of dam monitoring by the Electrical Resistivity Tomography method is carried out. The mathematical model is based on integral equations with a partial Fourier transform with respect to one spatial variable. It is assumed that the measurement line is located across the dam longitude. To approximate the shape of the dam surface, the Radial Basic Functions method is applied. The influence of locations of the water-dam, dam-basement, basement-leakage boundaries with respect to the sounding installation, which is partially placed under the headwater, is studied. Numerical modeling is carried out for the following varied parameters: 1) water level at the headwater; 2) the height of the leak; 3) the depth of the leak; 4) position of the supply electrode; 5) water level and leaks positions are changing simultaneously. Modeling results are presented in the form of apparent resistivity curves, as it is customary in geophysical practice.

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