Proceedings of the Ocean Drilling Program, 150X Scientific Results

Miller, Kenneth G.; Snyder, S.W.

doi:10.2973/odp.proc.sr.150x.1997

Cited by 15 publications

(8 citation statements)

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“…The NJCPDP began with drilling at Island Beach (March-April 1993), Atlantic City (June-August 1993), and Cape May (March-April 1994) as part of ODP Leg 150X (Miller et al, 1994a(Miller et al, , 1994b(Miller et al, , 1996aMiller and Snyder, 1997). These three sites targeted Oligocene-Miocene sequences and tried to unravel icehouse sea level changes tied to continental slope drilling by the R/V JOIDES Resolution during Leg 150 (Miller and Mountain, 1994;Miller et al, 1996bMiller et al, , 1998a.…”

Section: Background and Objectivesmentioning

confidence: 99%

Wilson Lake site

Miller¹,

Browning²,

Aubry³

et al. 2017

Proceedings of the Ocean Drilling Program

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Section: Background and Objectivesmentioning

confidence: 99%

Wilson Lake site

Miller¹,

Browning²,

Aubry³

et al. 2017

Proceedings of the Ocean Drilling Program

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“…Beneath the New Jersey coastal plain, a multilayered system saturated with fresh water is developed in unconsolidated siliciclastic deposits of Miocene age (Barlow, 2003;Barton et al, 1993;Miller and Snyder, 1998;Szabo et al, 2006). Due to onshore pumping and salt-water intrusion, the upper unconfi ned aquifer (surficial Kirkwood-Cohansey) commonly contains brackish or salty water at the coastline.…”

Section: Geological and Hydrogeological Backgroundsmentioning

confidence: 99%

Fresh-water and salt-water distribution in passive margin sediments: Insights from Integrated Ocean Drilling Program Expedition 313 on the New Jersey Margin

et al. 2013

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International audienceOn the New Jersey shelf (offshore North America), the presence of pore water fresher than seawater is known from a series of boreholes completed during the 1970s and 1980s. To account for this fresh water, a fi rst hypothesis involves possible present-day active dynamic connections with onshore aquifers, while a second involves meteoritic and/or sub- ice-sheet waters during periods of lowered sea level. Expedition 313 drilled three boreholes on the middle shelf, offering a unique opportunity for the internal structure of the siliciclastic system to be accessed, at scales ranging from the depositional matrix to the continental margin. This enables the stratigraphic architecture to be correlated with the spatial distribution and salinity of saturating fl uids. Expedition 313 revealed both very low salinities (<3 g/L) at depths exceeding 400 m below the seafl oor and evidence for a multilayered reservoir organization, with freshand/ or brackish-water intervals alternating vertically with salty intervals. In this study we present a revised distribution of the salinity beneath the middle shelf. Our observations suggest that the processes controlling salinity are strongly infl uenced by lithology, porosity, and permeability. Saltier pore waters generally occur in coarse-grained intervals and fresher pore waters occur in fi ne-grained intervals. The transition from fresher to saltier intervals is often marked by cemented horizons that probably act as permeability barriers. In the lowermost parts of two holes, the salinity varies independently of lithology, suggesting different mechanisms and/or sources of salinity. We present an interpretation of the sedimentary facies distribution, derived from core, logs, and seismic profi le analyses, that is used to discuss the marginscale two-dimensional reservoir geometry and permeability distribution. These proposed geometries are of primary importance when considering the possible pathways and emplacement mechanisms for the fresh and salty water below the New Jersey shelf

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“…Accumulation rates were generally low during Late Cretaceous to Paleogene siliciclastic and carbonate deposition (Poag, 1985). A major switch from carbonate ramp deposition to starved siliciclastic sedimentation occurred in the late middle Eocene onshore to earliest Oligocene on the slope in response to global and regional cooling (Miller and Snyder, 1997). Sedimentation rates increased dramatically in the late Oligocene to Miocene (Poag, 1985;Miller and Snyder, 1997).…”

Section: Geologic Settingmentioning

confidence: 99%

“…A major switch from carbonate ramp deposition to starved siliciclastic sedimentation occurred in the late middle Eocene onshore to earliest Oligocene on the slope in response to global and regional cooling (Miller and Snyder, 1997). Sedimentation rates increased dramatically in the late Oligocene to Miocene (Poag, 1985;Miller and Snyder, 1997). The cause of this large increase is unknown, although it may reflect tectonics in the hinterland (Poag and Sevon, 1989;Sugarman et al, 1993).…”

Section: Geologic Settingmentioning

confidence: 99%

“…Biofacies associations are generally clearest and paleodepth resolution optimal in nearshore to inner neritic environments (<30 m paleodepth), but unfortunately these associations are difficult to date. Consequently, biologic indicators of paleowater depth are best determined in nearshore to middle neritic facies; they become less precise in facies deeper than middle neritic (>100 m; see examples in Miller and Snyder, 1997). Work onshore New Jersey has shown that the best results can be obtained by targeting sequences deposited between 0 and 60 m paleodepth (Kominz and Pekar, 2001).…”

Section: Operational Strategymentioning

confidence: 99%

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Expedition 313 summary

Mountain¹,

Proust²,

McInroy³

et al. 2010

Proceedings of the IODP

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Integrated Ocean Drilling Program (IODP) Expedition 313 to the New Jersey Shallow Shelf off the east coast of the United States is the third IODP expedition to use a mission-specific platform. It was conducted by the European Consortium for Ocean Research Drilling (ECORD) Science Operator (ESO) between 30 April and 17 July 2009, with additional support from the International Continental Scientific Drilling Program (ICDP). There were three objectives: (1) date late Paleogene-Neogene depositional sequences and compare ages of unconformable surfaces that divide these sequences with times of sea level lowerings predicted from the δ 18 O glacio-eustatic proxy; (2) estimate the corresponding amplitudes, rates, and mechanisms of sea level change; and (3) evaluate sequence stratigraphic facies models that predict depositional environments, sediment compositions, and stratal geometries in response to sea level change. We drilled at three locations in around 35 m of water 45-67 km offshore, targeting the topsets, foresets, and toesets of several clinoforms at 180-750 meters below seafloor (mbsf). Seismic correlations to previously drilled holes on the continental slope and extrapolations of depths to key horizons in wells drilled into the adjacent coastal plain suggest the clinoform structures investigated during Expedition 313 were deposited during times of oscillations in global sea level; however, this needs to be determined with much greater certainty. The age, lithofacies, and core-log-seismic correlations provided by drilling at key locations will yield the data needed for a rigorous evaluation. We attempted 612 core runs with 80% recovery totaling 1311 m in length. Some or all of the upper 180-280 m of sand-prone sediment was drilled without coring. The deepest hole (M0029A) reached 757 mbsf, and the oldest sediment recovered was late Eocene (Hole M0027A). Wireline logs gathered spectral gamma ray, resistivity, magnetic susceptibility, sonic, and acoustic televiewer data; a vertical seismic profile was run at each site. Multisensor core logger (MSCL), natural gamma ray, and thermal conductivity measurements were made on all cores prior to splitting. Aided by physical properties of discrete samples measured onshore, we have established preliminary corelog-seismic ties with depth uncertainties typically ±7 m or less. We are confident that further study will narrow this range and firmly link facies successions to as many as 16 surfaces and/or sequence-bounding unconformities mapped in the regional seismic grid. Eight lithologic units are recognized that contain important Expedition 313 summary 1 Expedition 313 Scientists 2 Chapter contents

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Proceedings of the Ocean Drilling Program, 150X Scientific Results

Cited by 15 publications

References 0 publications

Wilson Lake site

Wilson Lake site

Fresh-water and salt-water distribution in passive margin sediments: Insights from Integrated Ocean Drilling Program Expedition 313 on the New Jersey Margin

Expedition 313 summary

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