Crustal Structure Along Sunda-Banda Arc Transition Zone from Teleseismic Receiver Functions

• Autorzy: Syuhada S. , Hananto N. D. , Abdullah C. I. , Puspito N. T. , Anggono T. , Yudistira T.

Identyfikatory

DOI

10.1515/acgeo-2015-0098

• Języki publikacji: EN

Abstrakty

EN

We analyzed receiver function of teleseismic events recorded at twelve Indonesian-GEOFON (IA-GE) broadband stations using nonlinear Neighbourhood Algorithm (NA) inversion and H-k stacking methods to estimate crustal thickness, Vp/Vs ratios and S-wave velocity structure along Sunda-Banda arc transition zone. We observed crustal thickness of 34-37 km in Timor Island, which is consistent with the previous works. The thick crust (> 30 km) is also found beneath Sumba and Flores Islands, which might be related to the arc-continent collision causing the thickened crust. In Timor and Sumba Islands, we observed high Vp/Vs ratio (> 1.84) with low velocity zone that might be associated with the presence of mafic and ultramafic materials and fluid filled fracture zone. The high Vp/Vs ratio observed at Sumbawa and Flores volcanic Islands might be an indication of partial melt related to the upwelling of hot asthenosphere material through the subducted slab.

Słowa kluczowe

EN

crustal structure; transition zone; Sunda-Banda arc; receiver function

PL

struktura skorupowa; strefa przejściowa

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2016
• Tom: Vol. 64, no. 6
• Strony: 2020--2050
• Opis fizyczny: Bibliogr. 61 poz.

Twórcy

autor

Syuhada S.

• Graduate Research on Earthquake and Active Tectonics (GREAT), Bandung Institute of Technology (ITB), Bandung, Indonesia
• Research Centre for Physics – Indonesian Institute of Sciences (LIPI), Tangerang Selatan, Indonesia

autor

Hananto N. D.

• Research Centre for Geotechnology – LIPI, Bandung, Indonesia

autor

Abdullah C. I.

• Faculty of Earth Sciences and Technology, ITB, Bandung, Indonesia

autor

Puspito N. T.

autor

Anggono T.

• Graduate Research on Earthquake and Active Tectonics (GREAT), Bandung Institute of Technology (ITB), Bandung, Indonesia

autor

Yudistira T.

• Faculty of Mining and Petroleum Engineering, ITB, Bandung, Indonesia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)