scholarly journals LoopStructural 1.0: time-aware geological modelling

2021 ◽  
Vol 14 (6) ◽  
pp. 3915-3937
Author(s):  
Lachlan Grose ◽  
Laurent Ailleres ◽  
Gautier Laurent ◽  
Mark Jessell
Keyword(s):  
South Australia ◽  
Model Design ◽  
Fault Surface ◽  
Flinders Ranges ◽  
Geological Modelling ◽  
Interpolation Algorithms ◽  
Geological Features ◽  
Python Package ◽  
Time Aware ◽  
Synthetic Proof

Abstract. In this contribution we introduce LoopStructural, a new open-source 3D geological modelling Python package (http://www.github.com/Loop3d/LoopStructural, last access: 15 June 2021). LoopStructural provides a generic API for 3D geological modelling applications harnessing the core Python scientific libraries pandas, numpy and scipy. Six different interpolation algorithms, including three discrete interpolators and 3 polynomial trend interpolators, can be used from the same model design. This means that different interpolation algorithms can be mixed and matched within a geological model allowing for different geological objects, e.g. different conformable foliations, fault surfaces and unconformities to be modelled using different algorithms. Geological features are incorporated into the model using a time-aware approach, where the most recent features are modelled first and used to constrain the geometries of the older features. For example, we use a fault frame for characterising the geometry of the fault surface and apply each fault sequentially to the faulted surfaces. In this contribution we use LoopStructural to produce synthetic proof of concepts models and a 86 km × 52 km model of the Flinders Ranges in South Australia using map2loop.

scholarly journals LoopStructural 1.0: Time aware geological modelling

2020 ◽  
Author(s):  
Lachlan Grose ◽  
Laurent Ailleres ◽  
Gautier Laurent ◽  
Mark Jessell
Keyword(s):  
South Australia ◽  
Model Design ◽  
Fault Surface ◽  
Flinders Ranges ◽  
Geological Modelling ◽  
Interpolation Algorithms ◽  
Geological Features ◽  
Python Package ◽  
Time Aware ◽  
Synthetic Proof

Abstract. In this contribution we introduce LoopStructural, a new open source 3D geological modelling python package ( https://www.github.com/Loop3d/LoopStructural). LoopStructural provides a generic API for 3D geological modelling applications harnessing the core python scientific libraries pandas, numpy and scipy. Six different interpolation algorithms, including 3 discrete interpolators and 3 polynomial trend interpolators, can be used from the same model design. This means that different interpolation algorithms can be mixed and matched within a geological model allowing for different geological objects e.g. different conformable foliations, fault surfaces, unconformities to be modelled using different algorithms. Geological features are incorporated into the model using a time-aware approach, where the most recent features are modelled first and used to constrain the geometries of the older features. For example, we use a fault frame for characterising the geometry of the fault surface and apply each fault sequentially to the faulted surfaces. In this contribution we use LoopStructural to produce synthetic proof of concepts models and a 86 x 52 km model of the Flinders ranges in South Australia using map2loop.

The Dawson Hill Member of the Grindstone Range Sandstone in the Flinders Ranges, South Australia

2010 ◽  
Vol 134 (1) ◽  
pp. 115-124 ◽  
Author(s):  
J.B. Jago ◽  
C.G. Gatehouse ◽  
C.McA. Powell ◽  
T. Casey ◽  
E.M. Alexander
Keyword(s):  
South Australia ◽  
Flinders Ranges

Studies of the yellow-footed rock-wallaby, Petrogale xanthopus Gray (Marsupialia : Macropodidae). Population studies at Middle Gorge, South Australia

1994 ◽  
Vol 21 (4) ◽  
pp. 473 ◽  
Author(s):  
AC Robinson ◽  
L Lim ◽  
PD Cantry ◽  
RB Jenkins ◽  
CA MacDonald
Keyword(s):  
Sex Ratio ◽  
Population Studies ◽  
South Australia ◽  
Effective Rainfall ◽  
Main Study ◽  
Exchange System ◽  
Two Phase ◽  
Flinders Ranges ◽  
Significant Bias ◽  
Males And Females

A mark-recapture study of Petrogale xanthopus at Middle Gorge in the southern Flinders Ranges revealed that between January 1979 and January 1984 the estimated known-to-be-alive population ranged from 11 to 20. During the main study, individuals living to an estimated age of six years were recorded. Captures of marked animals after completion of the main study revealed both males and females living to at least 10 years old. Births occurred throughout the year but there appeared to be an increase in births following periods of effective rainfall. For the whole study the sex ratio of pouch young did not vary significantly from 1:1. When individuals that gave birth more than once during the study were examined, there was a significant bias towards male young in the later births. It is suggested that this species has a two-phase reproductive strategy with the extra males, produced by older females, sustaining a male-exchange system with nearby colonies.

WOMEN OF THE ADNJAMATANA TRIBE OF THE NORTHERN FLINDERS RANGES, SOUTH AUSTRALIA

Oceania ◽  
1941 ◽  
Vol 12 (2) ◽  
pp. 155-162 ◽  
Author(s):  
C. P. Mountford ◽  
Alison Harvey
Keyword(s):  
South Australia ◽  
Flinders Ranges

Geology of the Beltana Willemite Deposit, Flinders Ranges, South Australia

2003 ◽  
Vol 98 (4) ◽  
pp. 797-818 ◽  
Author(s):  
I. M. Groves ◽  
C. E. Carman ◽  
W. J. Dunlap
Keyword(s):  
South Australia ◽  
Flinders Ranges

Subaqueous speleothems from the Flinders Ranges, South Australia, as palaeohydrological archives for the arid zone

2021 ◽  
Author(s):  
Calla Gould-Whaley ◽  
Russell Drysdale ◽  
Jan-Hendrick May ◽  
John Hellstrom ◽  
Hai Cheng ◽  
...  
Keyword(s):  
Arid Zone ◽  
Regional Climate ◽  
South Australia ◽  
Middle Latitude ◽  
Water Levels ◽  
Human Migration ◽  
Dispersal Patterns ◽  
Groundwater Levels ◽  
Flinders Ranges ◽  
Ecosystem Changes

<p>Australia is the driest continent outside of Antarctica yet relatively little is known about its long-term moisture history. Many local palaeoclimate archives suffer preservation problems, particularly in the arid centre of the continent, where weathering and erosion leave behind an incomplete record. In an attempt to redress the paucity of arid-zone palaeoclimate records, we investigate ‘pendulites’, subaqueous speleothems that grow episodically according to fluctuations in local groundwater levels. At Mairs Cave (central Flinders Ranges, South Australia), pendulites have formed around stalactites. During the first sustained episode of drowning, the stalactite is veneered by subaqueous calcite, sealing it and preventing further stalactitic growth after water levels fall. Once sealed, the pendulites only record periods of persistent drowning, assumed to correspond to major pluvial episodes.</p><p>Age data from two pendulite samples collected from close to the ceiling where the highest water levels have reached reveal two main groundwater ‘high-stand’ phases centred on ~67 and ~48 ka, coincident with Southern Hemisphere summer insolation maxima. This suggests that precession-driven southward migration of the ITCZ resulted in regular and persistent incursions of tropical air masses to the central Flinders Ranges. Trace element, stable isotope and growth-rate changes reveal that these orbitally controlled growth intervals are superimposed by regional climate responses to Dansgaard-Oeschger and Heinrich events. The results from Mairs Cave shed new light on the moisture history of central Australia, in particular the competing influences of tropical and middle-latitude circulation systems. This provides a precisely dated regional palaeoclimate template for reconstructing ecosystem changes, understanding human migration/dispersal patterns of the first Australians, and the progressive demise of megafauna. We also highlight the utility of subaqueous speleothems more generally as important archives for investigating arid-zone palaeoclimate.</p>

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