What type of structure is that?

Resolving the complex damage zones around faults when outcrop is not available is difficult and requires detailed modelling.

Faults in outcrop Ros King

Faults in outcrop (a) and in seismic (b) with all possible interpretations of the fault zone and geometry (b) from Botter et al, 2014.

Fieldwork is a fantastic method to observe the detail and true geometry of many different types of structures, from fractures to folds. But what happens when there is no outcrop to observe and measure? Faults and their associated damage zone fractures in offshore basins are mapped using seismic data. In many offshore settings these faults are listric normal faults and form as part of deforming sediment wedges or deltas.

These listric faults often form complicated hanging wall geometries such as rollovers, rotated blocks, and collapsed structures and differ from the footwall profiles (Bally et al., 1981; Fossen, 2010). These characteristics along with the poor seismic resolution towards deeper sections, make the performance of kinematic studies difficult and can impede the identification of changes in the fault growth histories.
 
This project aims to model seismic simulations of a variety of interpreted structures from both seismic data and those mapped at outcrop. Models will demonstrate changes in the sedimentary thickness, amount of vertical stress, changes in the fault timing, and possible cases of fault linkage.


Ros King

Supervisors

Associate Professor Ros King, Associate Professor Simon Holford and Dr Mark Bunch

Research area: Mineral and energy systems

Recommended honours enrolment: Honours in Geology

Tagged in Honours projects - Geology, Honours Projects - Rosalind King, Honours Projects - Simon Holford, Honours Projects - Mark Bunch