Particle-size related, mineral magnetic source sediment linkages in the Rhode River catchment, Maryland, USA

Oldfield, Frank; Maher, Barbara A.; Donoghue, Joseph F.; Pierce, J. W.

doi:10.1144/gsjgs.142.6.1035

Cited by 145 publications

(87 citation statements)

References 8 publications

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“…It is Even if the subtidal area and marshes acpossible that some of the deposited sedi-creted at the same rates in terms of depth, ment originated from shoreline erosion, but the rate of deposition of mineral sediment data from other studies on the mineralogy would still be related to the duration of suband magnetic susceptibility of sediments in mergence, because the mineral content of Muddy Creek suggests that the sediments the sediment increases with increasing suboriginated from soil eroded from the wa-mergence. Accretion of marsh sediment is tershed (Donoghue 1981;Oldfield 1983; due both to sediment trapping and to ac- Oldfield et al 1985). Also, the marshes cumulation ofplant detritus (Redfield 1972; along Muddy Creek tend to protect the shore Frey and Basan 1978).…”

Section: Methodsmentioning

confidence: 99%

Flux of Particulate Matter in the Tidal Marshes and Subtidal Shallows of the Rhode River Estuary

1986

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There was a net influx of suspended particulate matter to the uppermost part of the Rhode River estuary during the several years of this study. Most of the influx was due to episodic discharges of suspended sediment from the watershed during heavy rains. In contrast, tidal exchange of particulate matter was not related to rainstorms. Sediment composition data and historical records indicate that marsh accretion accounts for only 13% of the sediment trapping although marshes occupy 60% of the study area. Influx of particulate matter to the marshes is directly related to the amount of time they are submerged during tidal cycles.

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Section: Methodsmentioning

confidence: 99%

Flux of Particulate Matter in the Tidal Marshes and Subtidal Shallows of the Rhode River Estuary

1986

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“…[24] In highly energetic coastal environments, magnetic properties have a strong dependence on particle size [Oldfield et al, 1985;Yu and Oldfield, 1993; Hatfield and Maher, 2008]. Measurements of magnetic susceptibility of sieved fractions provide a more detailed understanding of prevailing depositional processes compared to bulk sample measurements.…”

Section: Particle Size Dependent Magnetic Measurementsmentioning

confidence: 99%

Formation of magnetite‐enriched zones in and offshore of a mesotidal estuarine lagoon: An environmental magnetic study of Tauranga Harbour and Bay of Plenty, New Zealand

Badesab

Dobeneck

Bryan

et al. 2012

Geochem Geophys Geosyst

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[1] Magnetic iron minerals are widespread and indicative sediment constituents in estuarine, coastal and shelf systems. We combine environmental magnetic, sedimentological and numerical methods to identify magnetite-enriched placer-like zones in a complex coastal system and delineate their formation mechanisms. Magnetic susceptibility and remanence measurements on 245 surficial sediment samples collected in and around Tauranga Harbour, the largest barrier-enclosed tidal estuary of New Zealand, reveal several discrete enrichment zones controlled by local hydrodynamic conditions. Active magnetite enrichment takes place in tidal channels, which feed into two coast-parallel nearshore magnetite-enriched belts centered at water depths of 6-10 m and 10-20 m. A close correlation between magnetite content and magnetic grain size was found, where higher susceptibility values are associated within coarser magnetic crystal sizes. Two key mechanisms for magnetite enrichment are identified. First, tide-induced residual currents primarily enable magnetite enrichment within the estuarine channel network. A coast-parallel, fine sand magnetite enrichment belt in water depths of less than 10 m along the barrier island has a strong decrease in magnetite ©2012. American Geophysical Union. All Rights Reserved.1 of 20 content away from the southern tidal inlet and is apparently related to active coast-parallel transport combined with mobilizing surf zone processes. A second, less pronounced, but more uniform magnetite enrichment belt at 10-20 m water depth is composed of non-mobile, medium-coarse-grained relict sands, which have been reworked during post-glacial sea level transgression. We demonstrate the potential of magnetic methods to reveal and differentiate coastal magnetite enrichment patterns and investigate their formative mechanisms.

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“…The technique has been applied to various depositional environments (e.g. Arkell et al, 1983;Oldfield et al, 1985White et al, 1997;Walden et al, 1995Walden et al, , 1997Schmidt et al, 1999;Wheeler et al, 1999). Many of the studies have explored the relationship between mineral magnetic measurements and chemical/physical properties of sediments and soils (Oldfield et al, 1985;Oldfield and Yu, 1994;Clifton et al, 1997Clifton et al, , 1999Chan et al, 1998;Petrovsky et al, 1998;Xie et al, 1999Xie et al, , 2000Booth, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…Arkell et al, 1983;Oldfield et al, 1985White et al, 1997;Walden et al, 1995Walden et al, , 1997Schmidt et al, 1999;Wheeler et al, 1999). Many of the studies have explored the relationship between mineral magnetic measurements and chemical/physical properties of sediments and soils (Oldfield et al, 1985;Oldfield and Yu, 1994;Clifton et al, 1997Clifton et al, , 1999Chan et al, 1998;Petrovsky et al, 1998;Xie et al, 1999Xie et al, , 2000Booth, 2002). Based on these investigations, mineral magnetic measurements have been identified as a suitable tool for determining sediment provenance (Oldfield and Yu, 1994;Booth, 2002), sediment transport pathways (Lepland and Stevens, 1996), and also to serve as a proxy for geochemical, radioactivity, organic matter content and particle size data (Bonnett et al, 1988;Oldfield et al, 1993;Hutchinson and Prandle, 1994;Clifton et al, 1997Clifton et al, , 1999Xie et al, 1999Xie et al, , 2000Zhang et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Use of mineral magnetic concentration data as a particle size proxy: A case study using marine, estuarine and fluvial sediments in the Carmarthen Bay area, South Wales, U.K.

Booth

Walden

Neal

et al. 2005

Science of The Total Environment

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Compositional (non-magnetic) data can correlate strongly with particle size, which deems it appropriate as a particle size proxy and, therefore, a reliable means of normalising analytical data for particle size effects. Previous studies suggest magnetic concentration parameters represent an alternative means of normalising for these effects and, given the speed, low-cost and sensitivity of the measurements may, therefore, offer some advantages over other compositional signals. In this work, contemporary sediments from a range of depositional environments have been analysed with regard to their mineral magnetic concentration and textural characteristics, to observe if the strength and nature of the relationship identified in previous studies is universal. Our data shows magnetic parameters (v LF , v ARM and SIRM) possess contrasting relationships with standard textural parameters for sediment samples collected from marine (Carmarthen Bay), estuarine (Gwendraeth Estuary) and fluvial (Rivers Gwendraeth Fach and Gwendraeth Fawr) settings. Magnetic concentrations of sediments from both the marine and estuarine environments are highly influenced by the magnetic contribution of finer particle sizes; Gwendraeth Fawr River sediments are influenced by the magnetic contribution of coarser particle sizes, while sediments from the Gwendraeth Fach River are not influenced significantly by any variations in textural properties. These results indicate mineral magnetic measurements have considerable potential as a particle size proxy for particular sedimentary environments, which in certain instances could be useful for geochemical, sediment transport, and sediment provenance studies. However, the data also highlight the importance of fully determining the nature of the relationship between sediment particle size and magnetic properties before applying mineral magnetic data as a particle size proxy. D

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Particle-size related, mineral magnetic source sediment linkages in the Rhode River catchment, Maryland, USA

Cited by 145 publications

References 8 publications

Flux of Particulate Matter in the Tidal Marshes and Subtidal Shallows of the Rhode River Estuary

Flux of Particulate Matter in the Tidal Marshes and Subtidal Shallows of the Rhode River Estuary

Formation of magnetite‐enriched zones in and offshore of a mesotidal estuarine lagoon: An environmental magnetic study of Tauranga Harbour and Bay of Plenty, New Zealand

Use of mineral magnetic concentration data as a particle size proxy: A case study using marine, estuarine and fluvial sediments in the Carmarthen Bay area, South Wales, U.K.

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