Nias basin, NW Sumatra – new insights into forearc structure and hydrocarbon prospectivity from long-offset 2D seismic data

  Last week, my colleague from TGS, Ian presented a talk in the 38th Indonesian petroleum Association annual meeting. He talked about the structures and hydrocarbon prospectivity of Nias forearc basin, which is situated in the central part of the offshore Sumatra forearc area. 1868 km of newly acquired long offset 2D seismic, covers the […]

Welcome to our blog

Hi all! Welcome to our blog, Tektonesiana. The name of Tektonesiana is derived from the word tectonics and Indonesia. Tektonesiana represents our ‘passion’ on tectonics of Indonesia. We, Indonesian geologists who share the same interest, use this blog to post articles that represent our works. These articles have been presented in scientific meetings. Some of […]

Doubly Vergent Accretionary Wedge Active Tectonics in The Sumatra Subduction Zone

This is an abstract of a talk presented at American Geophysical Union, Fall Meeting 2011. Active deformation along the western margin of the present day Mentawai forearc basin appeared as anticlinal ridges. Beneath the anticlinal ridges, the deformation zone exhibits (1) main backthrust, as the upward continuation of the Mentawai Backthrust in forearc basin, (2) […]

Neotectonics of the southern Sumatran Forearc

This article notes the structural features in the Mentawai forearc that can be interpreted as products of compression of the accretionary wedge and forearc basin sediments. Compressional phases since the Late Miocene initiated (a) the landward vergent foldthrust belt in the Mentawai Fault Zone (MFZ), (b) reactivation of seaward vergent imbricated thrusts in the retro-accretionary […]