Hydrothermal Effects on Isotope and Trace Element Records in Modern Reef Corals: A Study of Porites lobata from Tutum Bay, Ambitle Island, Papua New Guinea
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Other| June 01, 2000 Hydrothermal Effects on Isotope and Trace Element Records in Modern Reef Corals: A Study of Porites lobata from Tutum Bay, Ambitle Island, Papua New Guinea THOMAS PICHLER; THOMAS PICHLER 1Department of Geology, University of South Florida, 4202 E. Fowler Ave., Tampa, FL 33620 Search for other works by this author on: GSW Google Scholar JEFFREY M. HEIKOOP; JEFFREY M. HEIKOOP 2School of Geography and Geology, McMaster University, Hamilton, Ontario L8S 4M1, Canada also: EES-1, MS-D462, LANL, Los Alamos, NM 87545 Search for other works by this author on: GSW Google Scholar MICHAEL J. RISK; MICHAEL J. RISK 3School of Geography and Geology, McMaster University, Hamilton, Ontario L8S 4M1, Canada Search for other works by this author on: GSW Google Scholar JAN VEIZER; JAN VEIZER 4Ottawa-Carleton Geoscience Centre, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada also: Institut für Geologie, Ruhr Universität, 44780 Bochum, Germany Search for other works by this author on: GSW Google Scholar IAIN L. CAMPBELL IAIN L. CAMPBELL 5Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information THOMAS PICHLER 1Department of Geology, University of South Florida, 4202 E. Fowler Ave., Tampa, FL 33620 JEFFREY M. HEIKOOP also: EES-1, MS-D462, LANL, Los Alamos, NM 87545 2School of Geography and Geology, McMaster University, Hamilton, Ontario L8S 4M1, Canada MICHAEL J. RISK 3School of Geography and Geology, McMaster University, Hamilton, Ontario L8S 4M1, Canada JAN VEIZER also: Institut für Geologie, Ruhr Universität, 44780 Bochum, Germany 4Ottawa-Carleton Geoscience Centre, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada IAIN L. CAMPBELL 5Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada Publisher: SEPM Society for Sedimentary Geology Accepted: 02 Feb 2000 First Online: 03 Mar 2017 Online ISSN: 1938-5323 Print ISSN: 0883-1351 Society for Sedimentary Geology PALAIOS (2000) 15 (3): 225–234. https://doi.org/10.1669/0883-1351(2000)015<0225:HEOIAT>2.0.CO;2 Article history Accepted: 02 Feb 2000 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation THOMAS PICHLER, JEFFREY M. HEIKOOP, MICHAEL J. RISK, JAN VEIZER, IAIN L. CAMPBELL; Hydrothermal Effects on Isotope and Trace Element Records in Modern Reef Corals: A Study of Porites lobata from Tutum Bay, Ambitle Island, Papua New Guinea. PALAIOS 2000;; 15 (3): 225–234. doi: https://doi.org/10.1669/0883-1351(2000)015<0225:HEOIAT>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyPALAIOS Search Advanced Search Abstract The coral reef in Tutum Bay, Ambitle Island, Papua New Guinea, is exposed to the vigorous discharge of hydrothermal fluids (up to 98°C). This study investigates eight Porites lobata samples that were collected throughout the area of active venting at varying distances from vent sites. A sample from a "non-hydrothermal" coral (C-29), collected 10 km north of Tutum Bay, was analyzed for comparative purposes.Density banding is moderately well developed in these corals and subannual bands are common. For corals from Tutum Bay, δ13C ranges from −4.5 to −1.0‰ and δ18O from −6.0 to −3.8‰, which are relatively depleted values for shallow water Porites. The comparison sample, C-29, has δ13C values ranging from −1.8 to −0.5‰, and δ18O values of −5.4 to −4.6‰. Concentrations of As, Co, Cr, Ga, Ge, Mo, Nb, Ni, Pb, Rb, Se, W, Y and Zr were always below their respective proton probe detection limits. Ba, Br, Cu, Fe, Mn, and Zn were detected in some samples. Sr was detected in all samples and concentrations ranged from 6970 to 8240 ppm. Strontium isotope ratios of selected samples (C-5, C-8 and C-29) are very close to seawater, but Tutum Bay corals (C-5 and C-8) have lower 87Sr/86Sr values than the "non-hydrothermal" sample (C-29).The observed isotope patterns indicate that the hydrothermal input into Tutum Bay influences the physico-chemical conditions in the surrounding coral reef. Tutum Bay Porites lobata show distinctly different δ13C and 87Sr/86Sr records when compared to the "non-hydrothermal" sample and other corals from Papua New Guinea and elsewhere. Direct and indirect synergistic effects, including temperature, isotopic and chemical composition of vent fluids and the influence of pCO2 on the expression of photosynthetic and kinetic stable isotope fractionation factors, are the most likely explanation for the "hydrothermal" signal seen in these corals. The δ18O values are significantly correlated with the estimated amounts of hydrothermal exposure. 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Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,002 | 0,002 |
| Études des sciences et des technologies | 0,001 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,001 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,002 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».