EGU2020-21108
https://doi.org/10.5194/egusphere-egu2020-21108
EGU General Assembly 2020
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Crust and upper mantle structure of North Borneo explored using surface waves from ambient noise

Omry Volk1, Conor Bacon1, Felix Tongkul2, and Nick Rawlinson1
Omry Volk et al.
  • 1University of Cambridge, United Kingdom
  • 2UMS, Sabah, Malysia

South-East Asia is one of the most tectonically complex regions on Earth. North Borneo in particular is home to a number of intriguing features, the formation of which is not fully understood. These include the North-West Borneo trough, the rapidly uplifted 4000m high Mt Kinabalu and the uplifted circular sedimentary basins such as the Maliau Basin. To study North Borneo's tectonics in depth we deployed a new dense temporary network of 46 broadband seismometers across the regionin a semi-regular grid pattern with approximately 40km spacing. This closely spaced network, which operated for 22 months, allows a high-resolution seismic analysis of the crust and mantle under North Borneo. Here, we use ambient noise cross-correlations to measure phase velocities of surface waves. We then use the phase velocities to analyze the crustal and upper mantle structure.

How to cite: Volk, O., Bacon, C., Tongkul, F., and Rawlinson, N.: Crust and upper mantle structure of North Borneo explored using surface waves from ambient noise, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-21108, https://doi.org/10.5194/egusphere-egu2020-21108, 2020.