Rupture and accretion of the Celebes Sea crustrelated to the North–Sulawesi subduction: combinedinterpretation of reflection and refraction seismicmeasurements

Kopp, Christian; Flueh, Ernst R.; Neben, S.

doi:10.1016/s0264-3707(98)00004-0

Cited by 33 publications

(27 citation statements)

References 21 publications

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“…The above interpretation is also supported by refraction seismic data presented by Kopp et al . (1999).…”

Section: Results Of Multichannel Seismic Reflection Surveysupporting

confidence: 85%

“…(1999). The data of Kopp et al . (1999) shows that our interpretation of Zone C in profiles SO98‐30, 28 and 18 coincides with a major discontinuity in crustal structure.…”

Section: Results Of Multichannel Seismic Reflection Surveymentioning

confidence: 96%

“…Free Air gravity profile SO98‐28 generally exhibits negative anomalies, except in near‐shore areas, which have small positive anomalies of approximately 6 mgal. A gravity model of line SO98‐28 is based on gravity data and supported by multichannel reflection seismic data and a crustal density model based on refraction seismic data (Kopp et al . 1999).…”

Section: Results Of Multichannel Seismic Reflection Surveymentioning

confidence: 99%

“…(B) Calculated gravity anomaly for line SO98‐28 based on accretionary prism structural model. (C) Structural model based on refraction seismic model on the same line (Kopp et al . 1999).…”

Section: Results Of Multichannel Seismic Reflection Surveymentioning

confidence: 99%

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Evolution of an accretionary complex along the north arm of the Island of Sulawesi, Indonesia

Djajadihardja¹,

Taira²,

Tokuyama³

et al. 2004

Island Arc

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Seismic reflections across the accretionary prism of the North Sulawesi provide excellent images of the various structural domains landward of the frontal thrust. The structural domain in the accretionary prism area of the North Sulawesi Trench can be divided into four zones: (i) trench area; (ii) Zone A; (iii) Zone B; and (iv) Zone C. Zone A is an active imbrication zone where a decollement is well imaged. Zone B is dominated by out-of-sequence thrusts and small slope basins. Zone C is structurally high in the forearc basin, overlain by a thick sedimentary sequence. The subducted and accreted sedimentary packages are separated by the decollement. Topography of the oceanic basement is rough, both in the basin and beneath the wedge. The accretionary prism along the North Sulawesi Trench grew because of the collision between eastern Sulawesi and the Bangai-Sula microcontinent along the Sorong Fault in the middle Miocene. This collision produced a large rotation of the north arm of Sulawesi Island. Rotation and northward movement of the north arm of Sulawesi may have resulted in southward subduction and development of the accretionary wedge along North Sulawesi. Lateral variations are wider in the western areas relative to the eastern areas. This is due to greater convergence rates in the western area: 5 km/My for the west and 1.5 km/My for the east. An accretionary prism model indicates that the initiation of growth of the accretionary prism in the North Sulawesi Trench occurred approximately 5 Ma. A comparison between the North Sulawesi accretionary prism and the Nankai accretionary prism of Japan reveals similar internal structures, suggesting similar mechanical processes and structural evolution.

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“…The above interpretation is also supported by refraction seismic data presented by Kopp et al . (1999).…”

Section: Results Of Multichannel Seismic Reflection Surveysupporting

confidence: 85%

“…(1999). The data of Kopp et al . (1999) shows that our interpretation of Zone C in profiles SO98‐30, 28 and 18 coincides with a major discontinuity in crustal structure.…”

Section: Results Of Multichannel Seismic Reflection Surveymentioning

confidence: 96%

Section: Results Of Multichannel Seismic Reflection Surveymentioning

confidence: 99%

Section: Results Of Multichannel Seismic Reflection Surveymentioning

confidence: 99%

See 2 more Smart Citations

Evolution of an accretionary complex along the north arm of the Island of Sulawesi, Indonesia

Djajadihardja¹,

Taira²,

Tokuyama³

et al. 2004

Island Arc

View full text Add to dashboard Cite

show abstract

“…They considered all hypocentres to result from subduction of two slabs, the Sangihe slab and the Celebes slab, both of which bend through about 90°in the upper 200 km of the mantle beneath North Sulawesi. The Sangihe slab was traced in a similar way by Walpersdorf et al (1998) and Kopp et al (1999).…”

Section: North Sulawesi Trench Subductionmentioning

confidence: 99%