10.6084/m9.figshare.3453434.v1
T. T. Naing
T. T.
Naing
D. A. Bussien
D. A.
Bussien
W. H. Winkler
W. H.
Winkler
M. Nold
M.
Nold
A. Von Quadt
A.
Von Quadt
Provenance study on Eocene–Miocene sandstones of the Rakhine Coastal Belt, Indo-Burman Ranges of Myanmar: geodynamic implications
Geological Society of London
2016
magmatic zircons
Rakhine Coastal Belt
results show
petroleum system
Burman margin
detrital zircon analysis
Hf isotope ratios
clastic material
pelagic sediments
hydrocarbon exploration
zircon characteristics
Cretaceous
thrust sheets
petrographic parameters
Provenance study
orogenic terrane sources
Asian plate
detrital material
Burman margin sources
Indian plate
ophiolitic rocks
arc origin provenance
trench basin system model
IBR
Eocene
framework grain
Indian continent
sandstone
oceanic plate mafics
Hf isotope geochemistry
Neogene turbiditic sediments
accretionary wedge
Burman arc
geodynamic implications
Geology
2016-06-21 11:24:44
Journal contribution
https://geolsoc.figshare.com/articles/journal_contribution/Provenance_study_on_Eocene_Miocene_sandstones_of_the_Rakhine_Coastal_Belt_Indo-Burman_Ranges_of_Myanmar_geodynamic_implications/3453434
<p>The Indo-Burman Ranges (IBR) represent an accretionary wedge, which is the result of subduction of the Indian plate beneath
the Asian plate. In the Rakhine Coastal Belt it comprises a thick stack of Cretaceous to Neogene turbiditic sediments and
localized thrust sheets of oceanic plate mafics and pelagic sediments. We investigate Eocene–Miocene sandstones, aiming to
reveal the provenance of the detrital material using modal framework grain, heavy mineral and detrital zircon analysis (U–Pb
laser ablation ICP-MS dating, Hf isotope geochemistry and typology). The results show a predominant derivation of the clastic
material from: (i) Late Cretaceous to Oligocene igneous rocks, which are often bimodal with a low number of zircons spanning
the Cretaceous–Palaeogene boundary, and (ii) recycled orogenic terrane sources comprising ophiolitic rocks. Age corrected
Hf isotope ratios confirm subduction-related mixed mantle-crust sources. We also observe minor reworking of older magmatic
zircons. By comparing our obtained petrographic parameters and zircon characteristics with potential Himalayan, Indian continent
and Burman margin sources we conclude a Burman margin and arc origin provenance. With regard to hydrocarbon exploration in
the IBR, a forearc and trench basin system model linked with the Burman arc appears more appropriate for evaluating the petroleum
system.
</p>