TY - JOUR
T1 - Palaeoproterozoic terrestrial sedimentation in the Beasley River Quartzite, lower Wyloo Group, Western Australia
AU - Mazumder, Rajat
AU - Van Kranendonk, Martin J.
N1 - Funding Information:
RM is grateful to the UNSW for financial support in form of a Post Doctoral Fellowship and infrastructural facilities for field and laboratory studies. MVK was supported by a UNSW SPF01 grant. J. Latham and S. De have drafted Figs. 1 and 2 , respectively. The authors are grateful to two anonymous reviewers for their critical comments on an earlier version of this paper.
PY - 2013/7
Y1 - 2013/7
N2 - Pre-2.2. Ga aeolianite deposits are relatively rare in the geological record, due to reworking of aeolianites either by fluvial systems, transgression or non-recognition. Here, we present high resolution sedimentary facies analysis of a section through the 2.2. Ga Beasley River Quartzite, lower Wyloo Group, Western Australia. The unambiguous presence of terrestrial (fluvial-aeolian) deposition is documented in the form of fluvial architectural elements (channel, bar, lateral accretion and overbank deposits) and aeolian features (dune, pin-stripe lamination, wind streaks, and adhesion features). These observations contrast strongly with a previous interpretation of marine deposition, which is discounted. Our data is consistent with the dominantly terrestrial depositional mode of the rest of the lower Wyloo Group, including the basal Three Corners Conglomerate Member and the subaerial Cheela Springs Basalt. We conclude that the lower Wyloo succession formed in a terrestrial regime during continental rifting.
AB - Pre-2.2. Ga aeolianite deposits are relatively rare in the geological record, due to reworking of aeolianites either by fluvial systems, transgression or non-recognition. Here, we present high resolution sedimentary facies analysis of a section through the 2.2. Ga Beasley River Quartzite, lower Wyloo Group, Western Australia. The unambiguous presence of terrestrial (fluvial-aeolian) deposition is documented in the form of fluvial architectural elements (channel, bar, lateral accretion and overbank deposits) and aeolian features (dune, pin-stripe lamination, wind streaks, and adhesion features). These observations contrast strongly with a previous interpretation of marine deposition, which is discounted. Our data is consistent with the dominantly terrestrial depositional mode of the rest of the lower Wyloo Group, including the basal Three Corners Conglomerate Member and the subaerial Cheela Springs Basalt. We conclude that the lower Wyloo succession formed in a terrestrial regime during continental rifting.
KW - Aeolian
KW - Beasley River Quartzite
KW - Fluvial
KW - Palaeoproterozoic
KW - Terrestrial
KW - Western Australia
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U2 - 10.1016/j.precamres.2013.03.018
DO - 10.1016/j.precamres.2013.03.018
M3 - Article
AN - SCOPUS:84876712372
VL - 231
SP - 98
EP - 105
JO - Precambrian Research
JF - Precambrian Research
SN - 0301-9268
ER -
