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http://hdl.handle.net/2122/15617
Authors: | Obermann, Anne* Ruigrok, Elmer* Bianchi, Irene* Hetényi, Gyorgy* |
Title: | Constraining the Moho Depth Below Bhutan With Global-Phase Seismic Interferometry | Journal: | Frontiers in Earth Science | Series/Report no.: | /9 (2021) | Publisher: | Frontiers Media S.A. | Issue Date: | Dec-2021 | DOI: | 10.3389/feart.2021.658146 | URL: | https://www.frontiersin.org/articles/10.3389/feart.2021.658146/full | Abstract: | We use a novel technique named global-phase seismic interferometry (GloPSI) to image the lithospheric structure, and in particular the Moho, below two parallel north-south transects belonging to the GANSSER network (2013–2014). The profiles cross the Himalayan orogenic wedge in Bhutan, a tectonically important area within the largest continent-continent collision zone on Earth that is still undergoing crustal thickening and represents a challenging imaging target for the GloPSI approach. GloPSI makes use of direct waves from distant earthquakes and receiver-side reverberations with near vertical incidence. Reflections are isolated from earthquake recordings by solving a correlation integral and are turned into a reflectivity image of the lithosphere below the arrays. Our results compare favorably with first-order features observed from a previous receiver function (RF) study. We show that a combined interpretation of GloPSI and RF results allows for a more in-depth understanding of the lithospheric structure across the orogenic wedge in Bhutan. |
Appears in Collections: | Article published / in press |
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feart-09-658146(1).pdf | Open Access published article | 2.6 MB | Adobe PDF | View/Open |
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