Tectonic, diapiric and sedimentary chaotic rocks of the Rakhine coast, western Myanmar
Tectonic, diapiric and sedimentary chaotic rocks of the Rakhine coast, western Myanmar
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缅甸西部若开邦海岸的构造、底辟和沉积混沌岩
DOI：
10.1016/j.gr.2019.04.006
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发表时间：
2019
影响因子：
6.1
通讯作者：
Tin Naing Tun
中科院分区：
文献类型：
--
作者：
G. Moore;L. Aung;R. Fukuchi;J. Sample;E. Hellebrand;A. Kopf;W. Naing;W. Than;Tin Naing Tun
缅甸西缘是活动巽他（印度-欧亚）俯冲带的北延伸。沿海地区和近海岛屿沿波切阶地有明显的乱岩地体暴露，可以识别构造、沉积和底辟岩的特征。构造剪切带包含白垩纪蛇绿岩（含铬尖晶石的橄榄岩和放射虫质燧石）的碎片，它们与始新世浊积岩单元（破碎地层）的逆冲包接触。浊积岩中含有富含页岩的地层，这些地层在软沉积变形（沉积破碎地层）过程中被剪切，夹在未变形的厚砂层之间。这些是块体搬运沉积（MTDs），很可能是在喜马拉雅造山带初始碎屑沉积过程中形成的，很可能是在吸积棱镜上的海沟斜坡盆地。蛇绿岩和浊积岩逆冲断层已经被挖掘出来，目前正被活跃的泥火山侵入，泥火山将单元的碎片从深处带到了地面，形成了底辟地层。这些底辟矿体仅含有小碎片（<50 cm），它们是随机定向的，不表现出剪切结构。由于该地区缺乏大多数造山带的叠加变形特征，因此可以很容易地区分这三种岩体的成因。
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 mélanges to be recognized. Tectonic shear zones (tectonic mélanges) 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 mélanges. These diapiric mélange 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.
硼同位素地球化学揭示的活跃南海海槽俯冲带弧前的流体流动和水岩相互作用
影响因子：
5
作者：
Hüpers;Kasemann;Meixner;Shinjo
通讯作者：
Shinjo
日本南海海槽增生棱柱和熊野盆地泥浆火山作用和深层脱水过程的作用
影响因子：
3.7
作者：
Menapace;Völker
通讯作者：
Völker