Evidence of Holocene uplift in east New Britain, Papua New Guinea

K. E. Riker-Coleman; Christina D Gallup; L. M. Wallace; J. M. Webster; Hai Cheng; Larry Edwards

doi:10.1029/2006GL026596

Evidence of Holocene uplift in east New Britain, Papua New Guinea

K. E. Riker-Coleman, Christina D Gallup, L. M. Wallace, J. M. Webster, Hai Cheng, Larry Edwards

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Abstract

We present the first published evidence of uplift along the eastern coast of New Britain, Papua New Guinea based upon ²³⁰Th dating of uplifted Holocene coral reefs. Although uplift rates of the nearby Huon Peninsula are well constrained (∼2-3 m/ka), little is known about vertical motion along the eastern margin of New Britain. Based upon relative sea-level curves for Papua New Guinea, present sample elevations, and estimates of paleowater depth of four in-situ Holocene corals we calculate an average uplift rate of 1.6 ± 0.4 m/ka for the southeast coast of New Britain. We suggest undeTplating of subducted sediment as a possible mechanism for uplift of the reefs.

Original language	English (US)
Article number	L18612
Journal	Geophysical Research Letters
Volume	33
Issue number	18
DOIs	https://doi.org/10.1029/2006GL026596
State	Published - Sep 28 2006

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title = "Evidence of Holocene uplift in east New Britain, Papua New Guinea",

abstract = "We present the first published evidence of uplift along the eastern coast of New Britain, Papua New Guinea based upon 230Th dating of uplifted Holocene coral reefs. Although uplift rates of the nearby Huon Peninsula are well constrained (∼2-3 m/ka), little is known about vertical motion along the eastern margin of New Britain. Based upon relative sea-level curves for Papua New Guinea, present sample elevations, and estimates of paleowater depth of four in-situ Holocene corals we calculate an average uplift rate of 1.6 ± 0.4 m/ka for the southeast coast of New Britain. We suggest undeTplating of subducted sediment as a possible mechanism for uplift of the reefs.",

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AU - Riker-Coleman, K. E.

AU - Gallup, Christina D

AU - Wallace, L. M.

AU - Webster, J. M.

AU - Cheng, Hai

AU - Edwards, Larry

PY - 2006/9/28

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N2 - We present the first published evidence of uplift along the eastern coast of New Britain, Papua New Guinea based upon 230Th dating of uplifted Holocene coral reefs. Although uplift rates of the nearby Huon Peninsula are well constrained (∼2-3 m/ka), little is known about vertical motion along the eastern margin of New Britain. Based upon relative sea-level curves for Papua New Guinea, present sample elevations, and estimates of paleowater depth of four in-situ Holocene corals we calculate an average uplift rate of 1.6 ± 0.4 m/ka for the southeast coast of New Britain. We suggest undeTplating of subducted sediment as a possible mechanism for uplift of the reefs.

AB - We present the first published evidence of uplift along the eastern coast of New Britain, Papua New Guinea based upon 230Th dating of uplifted Holocene coral reefs. Although uplift rates of the nearby Huon Peninsula are well constrained (∼2-3 m/ka), little is known about vertical motion along the eastern margin of New Britain. Based upon relative sea-level curves for Papua New Guinea, present sample elevations, and estimates of paleowater depth of four in-situ Holocene corals we calculate an average uplift rate of 1.6 ± 0.4 m/ka for the southeast coast of New Britain. We suggest undeTplating of subducted sediment as a possible mechanism for uplift of the reefs.

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Evidence of Holocene uplift in east New Britain, Papua New Guinea

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