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SUMMARY:Chris Elders (Curtin University)
DTSTART:20201105T020000Z
DTEND:20201105T030000Z
DTSTAMP:20260523T122242Z
UID:RSES_school_seminar/52
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/RSES_school_
 seminar/52/">The evolution of the North West Shelf</a>\nby Chris Elders (C
 urtin University) as part of ANU Research School of Earth Sciences school 
 seminar\n\nLecture held in Jaeger 1 Seminar Room\, Research School of Eart
 h Sciences\, ANU Acton campus.\n\nAbstract\nWhile there is probably no suc
 h things as a “typical” passive continental margin\, the evolution of 
 the North West Shelf of Australia is particularly complex.  It has experie
 nced a series of Palaeozoic and Mesozoic rift events\, many of which are a
 ssociated with the separation of micro-continental fragments\, although th
 e mechanism by which this occurs is unclear.\n\nUnderstanding the Palaeozo
 ic history of the margin is particularly difficult as stratigraphic succes
 sions of this age are deeply buried and\, apart from on the basin margins\
 , are not often penetrated by wells.  However\, the widespread availabilit
 y of high quality seismic reflection data does provide some constraints.  
 The importance of Permian rifting in controlling the fundamental architect
 ure of the margin has become increasingly apparent\, as has the complexity
  of events during the Triassic.  Our understanding of the tectonic setting
  of the margin during this period of time continues to evolve.\n\nExtensio
 nal fault activity during the Mesozoic is also more complex than previousl
 y recognised.  Fault activity is clearly diachronous and the dominant faul
 t orientation does not necessarily appear consistent with plate tectonic r
 econstructions\, suggesting that processes other than plate boundary condi
 tions may drive deformation.  Sedimentary systems do however respond to ch
 anges in plate tectonic configuration and the evolution of the rift system
 .\n\nDeformation of the margin continues after final break up (separation 
 of Greater India and Australia)\, and it turns out that the margin is not 
 particularly “passive” after all.  Although not necessarily typical\, 
 the data-rich nature of the margin does provide insights into the range of
  processes that operate on rifted continental margins.\n
LOCATION:https://researchseminars.org/talk/RSES_school_seminar/52/
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