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

2019 ◽  
Author(s):  
Peter Nso ◽  
◽  
Andreas Eckert
Keyword(s):  
Numerical Modeling ◽  
Salt Diapir ◽  
Concentric Ring ◽  
Active Salt ◽  
Ring Faults

Dissolution collapse of a growing diapir from radial, concentric, and salt-withdrawal faults overprinting in the Salinas de Oro salt diapir, northern Spain

2017 ◽  
Vol 87 (2) ◽  
pp. 331-346
Author(s):  
Jesús Guerrero
Keyword(s):  
Fracture Pattern ◽  
Salt Diapir ◽  
Normal Faults ◽  
Northern Spain ◽  
Concentric Ring ◽  
Quaternary Deposits ◽  
Ring Fracture ◽  
Active Salt ◽  
Roof Strata ◽  
Salt Flow

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.

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

Geomorphology ◽  
2021 ◽  
pp. 107824
Author(s):  
Amos Frumkin ◽  
Shachak Pe’eri ◽  
Israel Zak
Keyword(s):  
Salt Diapir ◽  
Active Salt

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

2009 ◽  
Vol 31 (9) ◽  
pp. 989-995 ◽  
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

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

2010 ◽  
Vol 22 (4) ◽  
pp. 548-561 ◽  
Author(s):  
Johan Byskov Svendsen ◽  
Henrik Juhl Hansen ◽  
Thomas Staermose ◽  
Michael Kragh Engkilde
Keyword(s):  
North Sea ◽  
Salt Diapir ◽  
Active Salt

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

2003 ◽  
Vol 43 (1) ◽  
pp. 537 ◽  
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.

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

2007 ◽  
Author(s):  
T. Campbell ◽  
B. de Sonneville ◽  
L. Benedet ◽  
D. J. W. Walstra ◽  
C. W. Finkl
Keyword(s):  
Numerical Modeling ◽  
Barrier Island

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

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.

Numerical modeling to well-head protection area delineation, an example in Veneto Region (NE Italy)

2015 ◽  
Vol 35 ◽  
pp. 232-235 ◽  
Author(s):  
Leonardo Piccinini ◽  
Paolo Fabbri ◽  
Marco Pola ◽  
Enrico Marcolongo ◽  
Alessia Rosignoli
Keyword(s):  
Numerical Modeling ◽  
Veneto Region ◽  
Ne Italy ◽  
Head Protection ◽  
Protection Area
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