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

Riker-Coleman, K.E., Gallup, C.D., Wallace, L.M., Webster, J.M., Cheng, H., and Edwards, R.L. (2006) Evidence of Holocene uplift in east New Britain, Papua New Guinea. Geophysical Research Letters, 33 (18612). pp. 1-4.

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View at Publisher Website: http://dx.doi.org/10.1029/2006GL026596
 
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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 underplating of subducted sediment as a possible mechanism for uplift of the reefs.

Item ID: 4640
Item Type: Article (Research - C1)
ISSN: 1944-8007
Keywords: tectonics; Papua New Guinea; coral reef; Geochemistry
Date Deposited: 17 Jun 2009 03:33
FoR Codes: 04 EARTH SCIENCES > 0403 Geology > 040310 Sedimentology @ 34%
04 EARTH SCIENCES > 0403 Geology > 040313 Tectonics @ 33%
04 EARTH SCIENCES > 0403 Geology > 040303 Geochronology @ 33%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970104 Expanding Knowledge in the Earth Sciences @ 100%
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