DIVISION AND CHARACTERISTICS OF THE GEOTECTONIC UNITS OF MYANMAR
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摘要: 为合作开发周边国家矿产资源，在实地调研的基础上，结合前人资料的收集与整理，将缅甸的大地构造单元自西向东划分为5个Ⅰ级构造单元、10个Ⅱ级构造单元.具体是：①西克钦邦-若开邦结合带（E-N1）（Ⅰ），进一步划分为钦邦-若开邦结合带（E-N1）（Ⅰ1）、西克钦邦结合带（E-N1）（Ⅰ2）；②西缅甸-苏门答腊弧盆系（E-N1）（Ⅱ），进一步划分为蒙育瓦-勃生岛弧带（E-N1）（Ⅱ1）、瑞保-仰光弧后盆地（E-N1）（Ⅱ2）、密支那岛弧带（E-N1）（Ⅱ3）；③腾冲-马来半岛造山带（T3-K）（Ⅲ），进一步划分为八莫陆缘弧（T3-K）（Ⅲ1）、毛淡棉陆缘弧（T3-K）（Ⅲ2）、德林依达地块（Pz2）（Ⅲ3）；④保山-掸邦陆块（€-T2）（Ⅳ）；⑤昌宁-孟连-清莱结合带（C-T2）（Ⅴ）.这10个构造单元以9条断裂为边界.自西向东为：那加山-若开山逆冲断裂（F1）、平梨铺-卑谬伸展断裂（F2）、实皆-勃固右行平移断裂（F3）、葡萄-格杜逆冲断裂（F4）、英昆-八莫伸展断裂（F5）、南坎-抹谷右行平移断裂（F6）、曼德勒-垒固左行平移断裂（F7）、锡当-三塔左行平移断裂（F8）、孟宾-清迈逆冲断裂（F9）.Abstract: On the basis of field survey, with collected previous data, the authors divide the geotectonics of Myanmar into 5 first-ordered tectonic units, including 10 second-ordered tectonic units. They are, from west to east, 1) West Kachin-Pakhine suture zone (E-N1) (Ⅰ), with Chin-Pakhine suture zone (E-N1) (Ⅰ1) and West Kachin suture zone (E-N1) (Ⅰ2);2) West Myanmar-Pulau Sumatera arc basin system (E-N1) (Ⅱ), with Monywa-Pathein island arc belt (E-N1) (Ⅱ1), Shwebo-Yangon back-arc basin (E-N,) (Ⅱ2) and Myitkyina back-arc basin (E-N1) (Ⅱ3);3) Tengshong-Kra Peninsula orogenic belt (T3-K) (Ⅲ), with Bhamo continental marginal arc (T3-K) (Ⅲ1), Mawiamyine continental marginal arc (T3-K) (Ⅲ2) and Tanintharyi block (Pz2) (Ⅲ3);4) Baoshan-Shanbang landmass (€-T2) (Ⅳ);and 5) Changning-Menglian-Chiang Let suture zone (C-T2) (Ⅴ). The tectonic units are bounded by 9 faults, which, from west to east, are:Naga Yoma-Rakhine Yoma thrust fault (F1), Pinlebu-Pye extensional faults (F2), Sagaing-Bago dextral strike-slip fault (F3), Putao-Kadu thrust fault (F4), Ringhkung-Phamo extensional faults (F5), Namhkam-Mogok dextral strike-slip fracture (F6), Mandalay-Bago sinistral strike-slip fracture (F7), Xidang-santa sinistral strike-slip fracture (F8) and Mong Ping-Chiang Mai thrust fault (F9).
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Key words:
- geotectonic units /
- division /
- tectonic characteristics /
- Myanmar
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