DCO Project Summary

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Project Title
Census of Microbial Diversity in Ultra-deep, Fault-Bordered Sedimentary Rocks of a Foreland Basin in Taiwan
Start DateEnd Date
2011-01-01 2013-12-31
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To enhance the understanding of microbial ecosystems in deep consolidated sedimentary rocks, we propose to analyze community assemblages for samples retrieved from a foreland basin in Taiwan. The target samples at depths of 0.4 to 3 kmbl (kilometers below land surface) are Mio-Pleistocene sedimentary rocks formed during the convergence between the Eurasian and Philippine Sea Plates. The northwestward subduction leads to the oblique collision of the overlying Luzon arc with the Eurasian continent starting about 5 million years ago. The compressional uplift driven by the arc-continent collision propagates from north to south and from east to west through a series of thrusts and folds trending perpendicular to the major stress trajectories. From east to west, metamorphic complexes, Oligo-Miocene shelf-to-slope sedimentary rocks, and Mio-Pleistocene foreland sedimentary rocks were exhumed sequentially to accommodate the stress accumulation. The deformation front currently propagates to offshore southwestern Taiwan. We propose to apply 454-based tag sequencing to a suite of samples collected from the coring to undeformed and displaced sedimentary formations at depths of as great as 3 km below land surface in Taiwan to investigate the community patterns and shifts potentially controlled by the intrinsic rock property and geological framework. We anticipate that the sequencing results combined with other geochemical and cultivation data would provide insights into the distributions, community structures, and metabolic functions of microbial communities across various lithology units disturbed by the ongoing thrusting activities over millions of years in the active tectonic region.

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Reporting Year 2014 Click to expand

  • RY2014-1 - submitted on Aug 31, 2014

    Update Details:

    A paper is in review (Lin, L.-H., L.-W. Wu, T.-W. Cheng, W.-X. Du, J.-R. Lin, T.F. Yang, P.-C. Chen, Y. Wang, and P.-L. Wang. Distributions and assemblages of microbial communities along a sediment core retrieved from a potential hydrate-bearing region offshore southwestern Taiwan.)

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