Journal ArticleDOI
Early diagenesis of organic matter in Peru continental margin sediments: Phosphorite precipitation
Philip N. Froelich,Michael A. Arthur,William C. Burnett,M Deakin,V Hensley,Richard A. Jahnke,Lisa Wells Kaul,K.-H Kim,Kevin K. Roe,A Soutar,C Vathakanon +10 more
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TLDR
Pore water chemistry (total dissolved CO 2, NH 4, NO 3, NO 2, PO 4, Si(OH) 4, Ca, Mg, Fe, Mn, SO 4, H 2 S and F, and titration alkalinity) and sediment characteristics (porosity, dry bulk density and formation factors) were determined on a centimeter-scale spacing in the upper 20-40 cm of sediments under intense upwelling areas on the Peru continental shelf as discussed by the authors.About:
This article is published in Marine Geology.The article was published on 1988-05-01. It has received 337 citations till now. The article focuses on the topics: Phosphorite & Alkalinity.read more
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The size distribution of framboidal pyrite in modern sediments : an indicator of redox conditions
TL;DR: In this paper, a survey was made of framboid size distributions in recently deposited sediments from euxinic (Black Sea; Framvaren Fjord, Norway; Pettaquamscutt River Estuary, Rhode Island, USA), dysoxic (Peru Margin), and oxic (Wallops Island, Virginia, USA; Great Salt Marsh, Delaware, USA) environments.
Journal ArticleDOI
The phosphorus cycle, phosphogenesis and marine phosphate-rich deposits
TL;DR: In this article, a compilation of marine sedimentary phosphorus burial rates for the last 160 Myr suggests that natural variations have occurred that span one order of magnitude, which suggests that uniform interpretations with respect to the emplacement of major phosphorite deposits should be treated with caution.
Journal ArticleDOI
Authigenic apatite formation and burial in sediments from non-upwelling, continental margin environments
TL;DR: In this paper, the authors present porewater data suggestive of authigenic carbonate fluorapatite (CFA) formation in both these areas, suggesting that CFA is forming at the expense of organic P. This depth increase is mirrored by a decrease in solid-phase organic P at both sites, indicating continued formation of CFA during early diagenesis.
Journal ArticleDOI
Sedimentary Corg:P ratios, paleocean ventilation, and Phanerozoic atmospheric pO2
Thomas J. Algeo,Ellery D. Ingall +1 more
TL;DR: In this paper, a new atmospheric pO2 model was proposed that has strong similarities to existing models based on elemental and isotopic mass balances, yet differs in some potentially significant respects.
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Petrology of sedimentary rocks
TL;DR: The physical, chemical, and biologic properties of sedimentary rocks, as revealed by petrographic microscopy, geochemical techniques, and field study, are discussed in this paper.
References
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A modified single solution method for the determination of phosphate in natural waters
J. Murphy,J.P. Riley +1 more
TL;DR: In this article, a single solution reagent was described for the determination of phosphorus in sea water, which consists of an acidified solution of ammonium molybdate containing ascorbic acid and a small amount of antimony.
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Ferrozine---a new spectrophotometric reagent for iron
TL;DR: The ferroin group has been known to react as bidentate ligands with certain metal ions such as ferrous, cuprous, and cobaltous, to give colored complex species.
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Spectrophotometric determination of hydrogen sulfide in natural waters1
TL;DR: Winkler and Carpenter as mentioned in this paper proposed a modification of the Winkler method for the detection of dissolved oxygen in seawater, which has been shown to be more accurate than the original method.