Journal article

Constraining the timing of shale detachment faulting: A geochemical approach

Rowan L Hansberry, Horst Zwingmann, Stefan Loehr, Alan S Collins, Rosalind C King, Christopher K Morley, Russell N Drysdale

LITHOSPHERE | GEOLOGICAL SOC AMER, INC | Published : 2017

Abstract

K-Ar dating of illite in fault gouges is a useful tool for constraining the timing of brittle fault movement; however, this can be problematic in fault gouges hosted in clay-rich rocks due to the influence of host-rock material. Therefore, this study employs a multianalytical geochemical approach to unravel the influence of host-rock mineralogy, as well as fault zone development, on ages from fault-gouge samples in a shale detachment zone. K-Ar dating of the >2 pm fraction of 6 samples from the Sap Bon Formation detachment zone and associated fault zones in the Khao Khwang fold-thrust belt of centralThailand yielded an age range of 262 ± 5.4 to 208 ± 4.6 Ma. Carbon and oxygen stable isotope ..

View full abstract

University of Melbourne Researchers

Grants

Awarded by Australian Research Council


Awarded by International Geoscience Programme (IGCP)


Funding Acknowledgements

This work was funded by Australian Research Council Discovery Project DP-120101460. Collins was funded by Australian Research Council grant FT120100340. This is a contribution to International Geoscience Programme (IGCP) Projects 589 (Development of the Asian Tethyan Realm) and 628 (The Gondwana Map), and we gratefully acknowledge all the funding organizations. This publication forms TRaX (Centre for Tectonics Resources and Exploration, University of Adelaide) Record 371.