Rigid and non-rigid micro-plates: Philippines and Myanmar-Andaman case studies

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• 作者：Claude Rangin ^{rangin@geoazur.unice.fr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Tectonics ; Geodynamics ; SE Asia ; Micro-plates
• 刊名：Comptes Rendus Geoscience
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：348
• 期：1
• 页码：33-41
• 全文大小：3756 K

文摘

Generally, tectonic plates are considered as rigid. Oblique plate convergence favors the development of micro-plates along the converging boundaries. The north–south-trending Philippines archipelago (here named Philippine Mobile Belt, PMB), a few hundreds kilometers wide, is one of such complex tectonic zones. We show here that it is composed of rigid rotating crustal blocks (here called platelets). In Myanmar, the northernmost tip of the Sumatra-Andaman subduction system is another complex zone made of various crustal blocks in-between convergent plates. Yet, contrary to PMB, it sustains internal deformation with platelet buckling, altogether indicative of a non-rigid behavior. Therefore, the two case studies, Philippine Mobile Belt and Myanmar-Andaman micro-plate (MAS), illustrate the complexity of micro-plate tectonics and kinematics at convergent plate boundaries.