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<title>UTas ePrints - Sediment and trace element depositional history from the Ajkwa River estuarine mangroves of Irian Jaya (West Papua), Indonesia</title>
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<meta content="Brunskill, G.J." name="eprints.creators_name" />
<meta content="Zagorkis, I." name="eprints.creators_name" />
<meta content="Pfitzner, J." name="eprints.creators_name" />
<meta content="Ellison, J.C." name="eprints.creators_name" />
<meta content="g.brunskill@aims.gov.au" name="eprints.creators_id" />
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<meta content="j.pfitzner@aims.gov.au" name="eprints.creators_id" />
<meta content="Joanna.Ellison@utas.edu.au" name="eprints.creators_id" />
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<meta content="2008-01-28T22:44:02Z" name="eprints.datestamp" />
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<meta content="Sediment and trace element depositional history from the
Ajkwa River estuarine mangroves of Irian Jaya
(West Papua), Indonesia" name="eprints.title" />
<meta content="pub" name="eprints.ispublished" />
<meta content="300801" name="eprints.subjects" />
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<meta content="Ajkwa River estuary; Mangrove sedimentation rates; Trace elements" name="eprints.keywords" />
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" name="eprints.note" />
<meta content="Radiotracer 210Pb and contaminant copper were used to estimate sediment accumulation rates in 4 cores from the
Ajkwa River estuary and mangrove tidal channels in western Irian Jaya. Mass accumulation rates
(4.5–13 kg dry wtm2 yr1) were within the envelope of expectations for a region of high rainfall, great river catchment
relief, and rapid tectonic uplift of mountains. Copper accumulation rates were enhanced 40 fold in surface sediments,
compared to pre-1950 sections of the sediment cores. These recent sediments with enhanced copper
concentrations come from Freeport Indonesia mine tailings over the last 27 years. Variations in sediment core profiles
of Al, Fe, and organic carbon were small, indicating no great change in bulk sediment composition. Sulfur
concentrations decline toward the sediment surface, suggesting a decline in rates of microbial sulfate reduction.
Enhanced sediment copper concentrations will be a useful tracer of sediment dispersal from the Ajkwa River estuary
along this coast." name="eprints.abstract" />
<meta content="2001" name="eprints.date" />
<meta content="published" name="eprints.date_type" />
<meta content="Continental Shelf Research" name="eprints.publication" />
<meta content="24" name="eprints.volume" />
<meta content="19" name="eprints.number" />
<meta content="2535-2551" name="eprints.pagerange" />
<meta content="10.1016/j.csr.2004.07.024" name="eprints.id_number" />
<meta content="TRUE" name="eprints.refereed" />
<meta content="0278-4343" name="eprints.issn" />
<meta content="http://dx.doi.org/10.1016/j.csr.2004.07.024" name="eprints.official_url" />
<meta content="Alongi, D.M., Tirendi, F., Robertson, A.I., 1991. Vertical
profiles of copper in sediments from the Fly Delta and Gulf
of Papua (Papua NewGuinea). Marine Pollution Bulletin
22, 253–255.
ARTICLE IN PRESS
Table 5
Change in rate of supply of Cu, Pb, and Zn to sediments of core sites in the Ajkwa River estuary. Elemental deposition rate for sites 1
and 3 is calculated as the product of 210Pb derived accumulation rate (MAR) times the concentration of the element in pre-1950
sediment at the core bottom (Background), and in the top layers of the sediment core (Present). For sites 5 and 4, we used MAR
calculated from the history of mine waste production (see Table 2)
Site MAR
(kg dry wtm2 yr1)
Cu flux
(mmol Cum2 yr1)
Zn flux
(mmol Znm2 yr1)
Pb flux
(mmol Pbm2 yr1)
1 4.5 Background 1.35 4.3 0.32
Present 11.3 5.4 0.50
3 7.5 Background 3.0 9.0 0.68
Present 137 18 1.5
4 13 Background 7.8 16 1.3
Present 204 28 2.0
5 11 Background 6.6 11 1.1
Present 129 21 1.8
G.J. Brunskill et al. / Continental Shelf Research 24 (2004) 2535–2551 2549
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ARTICLE IN PRESS
2550 G.J. Brunskill et al. / Continental Shelf Research 24 (2004) 2535–2551
Report 6 of the Supervising Scientist for the Alligator
Rivers Region, Commonwealth of Australia, Australian
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Letters 15, 140–144." name="eprints.referencetext" />
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Ajkwa River estuarine mangroves of Irian Jaya
(West Papua), Indonesia" name="DC.title" />
<meta content="Brunskill, G.J." name="DC.creator" />
<meta content="Zagorkis, I." name="DC.creator" />
<meta content="Pfitzner, J." name="DC.creator" />
<meta content="Ellison, J.C." name="DC.creator" />
<meta content="300801 Environmental Management and Rehabilitation" name="DC.subject" />
<meta content="Radiotracer 210Pb and contaminant copper were used to estimate sediment accumulation rates in 4 cores from the
Ajkwa River estuary and mangrove tidal channels in western Irian Jaya. Mass accumulation rates
(4.5–13 kg dry wtm2 yr1) were within the envelope of expectations for a region of high rainfall, great river catchment
relief, and rapid tectonic uplift of mountains. Copper accumulation rates were enhanced 40 fold in surface sediments,
compared to pre-1950 sections of the sediment cores. These recent sediments with enhanced copper
concentrations come from Freeport Indonesia mine tailings over the last 27 years. Variations in sediment core profiles
of Al, Fe, and organic carbon were small, indicating no great change in bulk sediment composition. Sulfur
concentrations decline toward the sediment surface, suggesting a decline in rates of microbial sulfate reduction.
Enhanced sediment copper concentrations will be a useful tracer of sediment dispersal from the Ajkwa River estuary
along this coast." name="DC.description" />
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<h1 class="ep_tm_pagetitle">Sediment and trace element depositional history from the Ajkwa River estuarine mangroves of Irian Jaya (West Papua), Indonesia</h1>
<p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Brunskill, G.J.</span> and <span class="person_name">Zagorkis, I.</span> and <span class="person_name">Pfitzner, J.</span> and <span class="person_name">Ellison, J.C.</span> (2001) <xhtml:em>Sediment and trace element depositional history from the Ajkwa River estuarine mangroves of Irian Jaya (West Papua), Indonesia.</xhtml:em> Continental Shelf Research, 24 (19). pp. 2535-2551. ISSN 0278-4343</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/3053/1/CSR2001.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" border="0" class="ep_doc_icon" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/3053/1/CSR2001.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />491Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input value="4189" name="docid" accept-charset="utf-8" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1016/j.csr.2004.07.024">http://dx.doi.org/10.1016/j.csr.2004.07.024</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">Radiotracer 210Pb and contaminant copper were used to estimate sediment accumulation rates in 4 cores from the
Ajkwa River estuary and mangrove tidal channels in western Irian Jaya. Mass accumulation rates
(4.5–13 kg dry wtm2 yr1) were within the envelope of expectations for a region of high rainfall, great river catchment
relief, and rapid tectonic uplift of mountains. Copper accumulation rates were enhanced 40 fold in surface sediments,
compared to pre-1950 sections of the sediment cores. These recent sediments with enhanced copper
concentrations come from Freeport Indonesia mine tailings over the last 27 years. Variations in sediment core profiles
of Al, Fe, and organic carbon were small, indicating no great change in bulk sediment composition. Sulfur
concentrations decline toward the sediment surface, suggesting a decline in rates of microbial sulfate reduction.
Enhanced sediment copper concentrations will be a useful tracer of sediment dispersal from the Ajkwa River estuary
along this coast.</p></div><table style="margin-bottom: 1em" border="0" cellpadding="3" class="not_ep_block"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Additional Information:</th><td valign="top" class="ep_row">The definitive version is available at http://www.sciencedirect.com
</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">Ajkwa River estuary; Mangrove sedimentation rates; Trace elements</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/300801.html">300000 Agricultural, Veterinary and Environmental Sciences > 300800 Environmental Sciences > 300801 Environmental Management and Rehabilitation</a></td></tr><tr><th valign="top" class="ep_row">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">3053</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Dr Joanna Ellison</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">29 Jan 2008 09:44</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">29 Jan 2008 09:44</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=3053;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&eprintid=3053">item control page</a></p>
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