TY - JOUR
T1 - Provenance of the Tertiary sedimentary rocks of the Indo-Burman Ranges, Burma (Myanmar)
T2 - Burman arc or Himalayan-derived?
AU - Allen, R.
AU - Carter, A.
AU - Najman, Y.
AU - Carter, A.
AU - Barfod, D.
AU - Bickle, M.J.
AU - Chapman, H.J.
AU - Garzanti, E.
AU - Vezzoli, G.
AU - Ando , S.
AU - Parrish, R.R.
PY - 2008/12/1
Y1 - 2008/12/1
N2 - The Indo-Burman Ranges in western Myanmar extend along the Sunda Arc subduction zone and may be divided into a western portion of Neogene sedimentary rocks and an eastern portion of Palaeogene sedimentary rocks, separated by the Kaladan Fault. Both Himalayan and Burman sources have been proposed for these sediments. Our thermochronological analyses on detrital grains, isotopic analyses on bulk rock, and petrographic and heavy mineral data indicate that the Palaeogene Indo-Burman Ranges contain a significant component of arc-derived material, interpreted as derived from the Burmese portion of the Mesozoic-Tertiary arc to the east. And older crustal component is also identifiable, which may have been sourced from the Himalaya or the Burmese margin. By contrast, the Neogene Indo-Burman Ranges show dominant derivation from the Himalaya. A minor arc-derived component may have been sourced from the Trans-Himalaya, or recycled from the arc-derived Paleogene Indo-Burman Ranges.
AB - The Indo-Burman Ranges in western Myanmar extend along the Sunda Arc subduction zone and may be divided into a western portion of Neogene sedimentary rocks and an eastern portion of Palaeogene sedimentary rocks, separated by the Kaladan Fault. Both Himalayan and Burman sources have been proposed for these sediments. Our thermochronological analyses on detrital grains, isotopic analyses on bulk rock, and petrographic and heavy mineral data indicate that the Palaeogene Indo-Burman Ranges contain a significant component of arc-derived material, interpreted as derived from the Burmese portion of the Mesozoic-Tertiary arc to the east. And older crustal component is also identifiable, which may have been sourced from the Himalaya or the Burmese margin. By contrast, the Neogene Indo-Burman Ranges show dominant derivation from the Himalaya. A minor arc-derived component may have been sourced from the Trans-Himalaya, or recycled from the arc-derived Paleogene Indo-Burman Ranges.
U2 - 10.1144/0016-76492007-143
DO - 10.1144/0016-76492007-143
M3 - Article
SN - 0016-7649
VL - 165
SP - 1045
EP - 1057
JO - Journal of the Geological Society
JF - Journal of the Geological Society
IS - 6
ER -