Growth of forearc highs and basins in the oblique Sumatra subduction system  

作　　者：MUKTI Maruf M MAULIN Hade B PERMANA Haryadi 

机构地区：[1]Indonesian Institute of Sciences,Bandung 40135,Indonesia [2]New Venture Division-Sub Holding Upstream,Pertamina Hulu Energi,Jakarta 12520,Indonesia

出　　处：《Petroleum Exploration and Development》2021年第3期683-692,共10页石油勘探与开发（英文版）

摘　　要：Based on structural deformation analysis in the oblique Sumatra subduction system, we review uplift mechanisms of the forearc high and formation of the forearc basin. The development of the forearc high has been attributed to the flexural uplift, basin inversion, uplift of older accretion wedge, and backthrust in the landward margin of the accretion wedge. Observation of recently acquired seismic reflection data shows that the interplay between trenchward-vergent thrusts and arcward-vergent backthrusts has played a major role in the uplift of forearc high. The uplifted sediments on the forearc high were previously formed in a forearc basin environment. The present-day morphology of the forearc high and forearc basin is related to the uplift of the accretionary wedge and the overlying forearc basin sediments during Pliocene. Regardless of obliquity in the subduction system, the Sumatran forearc region is dominated by compression that plays an important role in forming Neogene basin depocenters that elongated parallel to the trench.

关 键 词：oblique subduction strain partitioning FOREARC thrust fault strike-slip fault 

分 类 号：P618.13[天文地球—矿床学]