Nature of Porosity in Marine Calcite Concretions: Insights from Ion‐Micromilled Surfaces
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Published:January 01, 2019
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CiteCitation
Donald F. McNeill, Ibukun Bode-Omoleye, G. Michael Grammer, 2019. "Nature of Porosity in Marine Calcite Concretions: Insights from Ion‐Micromilled Surfaces", Carbonate Pore Systems: New Developments and Case Studies, Donald F. McNeill, Paul (Mitch) Harris, Eugene C. Rankey, Jean C.C. Hsieh
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Marine low-magnesium calcite concretions are widespread in many siliciclastic and mixed carbonate–siliciclastic shelf and basinal settings. The process of concretion formation is generally well established and involves microbial influence (mostly sulfate reduction to oxidize organic material at or just below the seafloor). The microbes produce interstitial fluids that are conducive to abundant, and apparently rapid, precipitation of calcite cements. Pervasive cementation generates well-indurated beds or isolated flattened “pods” that are commonly confined to specific stratigraphic horizons. Stratabound concretions can be important as fluid-flow barriers during subsequent burial and compaction. Thin-section and scanning electron microscopy of Cenozoic and Mesozoic concretions has...
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Contents
Carbonate Pore Systems: New Developments and Case Studies
GeoRef
- alkaline earth metals
- Antilles
- Argentina
- burial
- calcite
- carbonate rocks
- carbonates
- Caribbean region
- cementation
- Cenozoic
- compaction
- concretions
- crystal structure
- dehydration
- diagenesis
- directional drilling
- Dominican Republic
- drilling
- EDS spectra
- electron microscopy data
- Greater Antilles
- Hispaniola
- horizontal drilling
- Jurassic
- magnesium
- marine environment
- marine sediments
- Mesozoic
- metals
- Miocene
- Neogene
- Neuquen Basin
- oxidation
- paleoenvironment
- permeability
- petroleum
- pore water
- porosity
- precipitation
- sea water
- secondary structures
- sedimentary rocks
- sedimentary structures
- sediments
- SEM data
- siliciclastics
- South America
- spectra
- Tertiary
- transpression
- Upper Jurassic
- upper Miocene
- Vaca Muerta Formation
- West Indies
- X-ray spectra
- Rio Mao
- Cercado Formation
- Cibao Basin
- Rio Gurabo
- Chos Malal Argentina
- unconventional reservoirs
- Puerta Curaco