Phosphorus accumulation rates in a Miocene low oxygen basin: The Monterey Formation (Pismo Basin), California

Filippelli, Gabriel M.; Delaney, Margaret Lois; Garrison, Robert E.; Omarzai, Sheraz Khan; Behl, Richard J.

doi:10.1016/0025-3227(94)90055-8

Cited by 22 publications

(5 citation statements)

References 21 publications

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“…The Monterey contains extensive siliceous deposits, dominated by diatoms and radiolarians, some of which are high in phosphorus (Pisciotto and Garrison, 1981;Behl, 1999). Phosphorus concentrations in portions of the Monterey Formation exceed 1% by weight (Filippelli et al, 1994). Monterey Formation rocks are composed JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION of three different lithologies: siliceous rocks, phosphatic rocks, and calcareous rocks (Filippelli et al, 1994).…”

Section: Discussionmentioning

confidence: 99%

“…Phosphorus concentrations in portions of the Monterey Formation exceed 1% by weight (Filippelli et al, 1994). Monterey Formation rocks are composed JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION of three different lithologies: siliceous rocks, phosphatic rocks, and calcareous rocks (Filippelli et al, 1994). Authigenic carbonate fluorapatite occurs in these deposits and represents a locally important source of phosphorus to streams.…”

Section: Discussionmentioning

confidence: 99%

“…Malibu Creek, Las Virgenes, and other small creeks flow through a mixed lithology of marine sedimentary and volcanic rocks. Rocks of the Monterey Formation accumulated significant amounts of phosphorus due to its origin in a restricted basin (Filippelli et al, 1994). However, the Monterey Formation is not the only geological source of phosphorus to the streams in this watershed.…”

Section: Case Studies Of Selected Watershedsmentioning

confidence: 97%

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Sources and Transport of Phosphorus to Rivers in California and Adjacent States, U.S., as Determined by SPARROW Modeling

Domagalski

Saleh

2015

J American Water Resour Assoc

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The SPARROW (SPAtially Referenced Regression on Watershed attributes) model was used to simulate annual phosphorus loads and concentrations in unmonitored stream reaches in California, U.S., and portions of Nevada and Oregon. The model was calibrated using de-trended streamflow and phosphorus concentration data at 80 locations. The model explained 91% of the variability in loads and 51% of the variability in yields for a base year of 2002. Point sources, geological background, and cultivated land were significant sources. Variables used to explain delivery of phosphorus from land to water were precipitation and soil clay content. Aquatic loss of phosphorus was significant in streams of all sizes, with the greatest decay predicted in small-and intermediate-sized streams. Geological sources, including volcanic rocks and shales, were the principal control on concentrations and loads in many regions. Some localized formations such as the Monterey shale of southern California are important sources of phosphorus and may contribute to elevated stream concentrations. Many of the larger point source facilities were located in downstream areas, near the ocean, and do not affect inland streams except for a few locations. Large areas of cultivated land result in phosphorus load increases, but do not necessarily increase the loads above those of geological background in some cases because of local hydrology, which limits the potential of phosphorus transport from land to streams.(KEY TERMS: nutrients; phosphorus; geology; transport and fate; simulation; watersheds; SPARROW.) Domagalski, Joseph and Dina Saleh, 2015. Sources and Transport of Phosphorus to Rivers in California and Adjacent States, U.S., as Determined by SPARROW Modeling.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Case Studies Of Selected Watershedsmentioning

confidence: 97%

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Sources and Transport of Phosphorus to Rivers in California and Adjacent States, U.S., as Determined by SPARROW Modeling

Domagalski

Saleh

2015

J American Water Resour Assoc

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“…Organic matter is the principle shuttle of P to sediments and during its degradation, phosphate is released to the porewater, which then undergoes various biogeochemical processes (Filippelli et al, ; Froelich et al, ; Ingall & Jahnke, ). In an oxic environment, most labile organic matter undergoes degradation within the water column, resulting in low P org and C org contents in the sediments (Ni et al, ).…”

Section: Discussionmentioning

confidence: 99%

Distribution and Diagenesis of Phosphorus in the Deep‐Sea Sediments of the Central Indian Basin

et al. 2018

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A regional solid‐phase phosphorus (P) speciation study in the Central Indian Basin (CIB) was carried out to elucidate the spatial distribution of sedimentary P species and P diagenesis in an oligotrophic setting. The results show that P enrichment is in the order of biogenic (Pbio) > authigenic (Pauth) > iron bound (PFe) > detrital (Pdet) > organic (Porg) P. The higher concentrations of Pbio are found in siliceous oozes, which are attributed to high biological productivity in the overlying waters compared to pelagic clay region. High Pauth and Pdet contents with low molar Corg/Preact ratios in the pelagic/red clays indicate the deposition of calcium fluorapatite and refractory material from the atmospheric input. The oxygenated bottom water promotes adsorption of P onto iron oxyhydroxides making the PFe an important sink. Remobilization of P within the sediments is limited because of well‐oxygenated conditions and an efficient adsorption by iron oxyhydroxides and clay‐sized sediments. A twofold increase in Ptotal and P‐species is observed in hydrothermally altered, ferruginous sediments from a seamount flank suggesting an important role of hydrothermal processes in P cycling. The calculated P accumulation rate in the present study ranges between 0.6 and 11.7 μmol·cm−2·kyr−1. The burial flux of P for the entire CIB (5.7 × 106 km2) is 0.01 × 1010 mol P per year which accounts for 0.05% of the global flux. The benthic P fluxes from the seawater to the sediments in the area range between 0.0093 and 0.133 μmol·cm−2·kyr−1 indicating that the CIB sediments are an important sink for P.

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“…where F is the rate of P accumulation (expressed in lmol cm )2 kyr )1 ), (wt%) is the mean P concentration of the Phosphorite Unit, s is the postcompaction sedimentation rate (net rate of sedimentation accumulation after compaction and diagenesis) of is the Phosphorite Unit (cm kyr )1 ), d is the pre-compaction density of the sediment assemblage over the Phosphorite Unit, and aw is the atomic weight of P (30AE97); an estimated value of 1AE2 g cm )3 was used for d (cf. also Filippelli et al, 1994).…”

Section: Methodsmentioning

confidence: 99%

Geochemical diagenetic trends during phosphorite formation – economic implications: The case of the Negev Campanian phosphorites, Southern Israel

Soudry¹,

Nathan²,

Ehrlich³

2012

Sedimentology

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Research on the Upper Campanian (Upper Cretaceous) Negev phosphorites (Mishash Formation), based on microprobe analyses, Fourier Transform Infrared spectroscopy, wet chemistry, microtextural (Scanning Electron Microscopy) studies and mineralogical analyses, together with quantified rates of sedimentation and P accumulation, enables the chemistry of these rocks to be better constrained across the Negev area and allows their suitability for the manufacture of P fertilizers to be better determined. Two phosphorite facies are differentiated: (i) a pristine phosphorite facies of low P content, more typical of basinal sections and (ii) a reworked, granular phosphorite facies commonly enriched in P, found predominantly near palaeo‐highs and forming most of the economic phosphates. The distribution of F/P2O5, CO2/F, U(IV), Cd, Zn and other trace metals (Mo, Ni, Cr, Cu, V and Y), rare‐earth elements concentration, Ce and Eu anomalies and heavy rare earth elements enrichment, are controlled by these two facies. F/P2O5 in carbonate‐fluorapatite is much lower (0·090 to 0·107) in the pristine than in the reworked facies (0·107 to 0·120); in addition, the lower F/P2O5 in the pristine facies is coupled with: (i) higher Cd, Zn, Mo, Ni, Cr, Cu and V concentrations; (ii) a considerably reduced (< 10%) U(IV) fraction of total U; (iii) lower rare earth elements/P2O5 and Y/P2O5 ratios; (iv) less negative Ce and Eu anomalies and lower heavy rare earth elements (Lu/La) enrichment; (v) an increase in Fe‐rich smectites in the clay fraction; and (vi) presence of OH in the carbonate‐fluorapatite structure. Sedimentary reworking of previously formed pristine phosphate, together with its redeposition near structural highs in more oxic bottom conditions, results in considerable diagenetic changes in the chemistry of the phosphorites, making them more suitable for economic exploitation. The results presented here provide geochemical criteria for identifying pristine phosphate in other phosphorite sequences and may help to better locate phosphate strata chemically suitable for the phosphate industry elsewhere.

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Phosphorus accumulation rates in a Miocene low oxygen basin: The Monterey Formation (Pismo Basin), California

Cited by 22 publications

References 21 publications

Sources and Transport of Phosphorus to Rivers in California and Adjacent States, U.S., as Determined by SPARROW Modeling

Sources and Transport of Phosphorus to Rivers in California and Adjacent States, U.S., as Determined by SPARROW Modeling

Distribution and Diagenesis of Phosphorus in the Deep‐Sea Sediments of the Central Indian Basin

Geochemical diagenetic trends during phosphorite formation – economic implications: The case of the Negev Campanian phosphorites, Southern Israel

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