Tag: Sunda-Java

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Sunda-Java SZI Events

Sunda-Java subduction zone initiation

Schematic tectonic reconstruction of the Sunda-Java SZI event (modified from Hall, 2012). Subduction of the Indo-Australian plate at the Sundaland margin has been episodically ongoing since >100 Ma. The most recent episode occurred at ca. 40–60 Ma and it initiated the new Sunda-Java subduction zone. Shown are the new subduction zone (pink line), other active (solid purple lines) and inactive (dashed purple lines) subduction zones, spreading ridges (solid red lines), and transform faults (red dashed lines).
Schematic tectonic reconstruction of the Sunda-Java SZI event (modified from Hall, 2012). Subduction of the Indo-Australian plate at the Sundaland margin has been episodically ongoing since >100 Ma. The most recent episode occurred at ca. 40–60 Ma and it initiated the new Sunda-Java subduction zone. Shown are the new subduction zone (pink line), other active (solid purple lines) and inactive (dashed purple lines) subduction zones, spreading ridges (solid red lines), and transform faults (red dashed lines).

The Sunda-Java SZI event likely re-initiated subduction at Sundaland’s southern margin between 60–40 Ma. The evolving subduction zone’s history includes earlier accretion of the Woyla arc, a hiatus in subduction, and evidence from seismic tomography suggesting the current slab’s depth aligns with historical models, indicating significant tectonic interactions over time.