@article{78758e823a3f4d558d73af89e044225b,
title = "Tectonic, diapiric and sedimentary chaotic rocks of the Rakhine coast, western Myanmar",
abstract = "The western margin of Myanmar is the northern extension the active Sunda (India-Eurasia) subduction zone. Coastal regions and offshore islands have remarkable exposures of chaotic rock terranes along wave-cut terraces that allow characteristics of tectonic, sedimentary and diapiric m{\'e}langes to be recognized. Tectonic shear zones (tectonic m{\'e}langes) contain fragments of Cretaceous ophiolites (chrome-spinel-bearing peridotites and radiolarian cherts) that are in contact with thrust packets of Eocene turbidite units (broken formations). The turbidites contain shale-rich beds that have been sheared during soft-sediment deformation (sedimentary broken formations) and are sandwiched between undeformed thick sandy beds. These are mass transport deposits (MTDs) that most likely formed during deposition of the initial detritus of the Himalayan orogenic zone, probably trench slope basins on the accretionary prism. The ophiolitic and turbiditic thrust slices have been exhumed and are currently being intruded by active mud volcanoes that bring fragments of units up from depth to the surface, forming diapiric m{\'e}langes. These diapiric m{\'e}lange bodies contain only small fragments (<50 cm) that are randomly oriented and do not exhibit shear fabrics. Because the region lacks superimposed deformation characteristic of most orogenic belts, the origins of all three rock bodies can easily be distinguished.",
keywords = "Exhumation, Myanmar tectonics, Northern Sunda arc, Rakhine coast, Subduction",
author = "Moore, {G. F.} and Aung, {Lin Thu} and R. Fukuchi and Sample, {J. C.} and E. Hellebrand and A. Kopf and Win Naing and Than, {Win Min} and Tun, {Tin Naing}",
note = "Funding Information: We thank Dietrich Bannert for providing scans of his 1978 report on the Geology of Ramree and Cheduba Islands, including his geologic maps that were immensely helpful during our field work. We also thank Simone Kasemann, Anette Meixner and Matthias Zabel for B and Li geochemical analysis at MARUM, Univ. Bremen and Greg Ravizza for help in producing the isotope data plots. Chris Morley, Yuzuru Yamamoto, Journal Guest Editor Andrea Festa, and an anonymous reviewer provided insightful comments that led to a much-improved manuscript. We thank Tony Barber for his detailed review that caused much rethinking of our interpretations; however, we also acknowledge that Tony has long disagreed with the first author's interpretations of Nias geology and does not fully agree with some of our current interpretations of Myanmar geology. Partially funded by US National Science Foundation Grant #OCE-1260718. SOEST contribution # 10634. Funding Information: We thank Dietrich Bannert for providing scans of his 1978 report on the Geology of Ramree and Cheduba Islands, including his geologic maps that were immensely helpful during our field work. We also thank Simone Kasemann, Anette Meixner and Matthias Zabel for B and Li geochemical analysis at MARUM, Univ. Bremen and Greg Ravizza for help in producing the isotope data plots. Chris Morley, Yuzuru Yamamoto, Journal Guest Editor Andrea Festa, and an anonymous reviewer provided insightful comments that led to a much-improved manuscript. We thank Tony Barber for his detailed review that caused much rethinking of our interpretations; however, we also acknowledge that Tony has long disagreed with the first author's interpretations of Nias geology and does not fully agree with some of our current interpretations of Myanmar geology. Partially funded by US National Science Foundation Grant # OCE-1260718 . SOEST contribution # 10634. Publisher Copyright: {\textcopyright} 2019 International Association for Gondwana Research",
year = "2019",
month = oct,
doi = "10.1016/j.gr.2019.04.006",
language = "English (US)",
volume = "74",
pages = "126--143",
journal = "Gondwana Research",
issn = "1342-937X",
publisher = "Elsevier Inc.",
}