Diagenetic` Processes in Sandstones

Blatt, Harvey

doi:10.2110/pec.79.26.0141

Cited by 52 publications

(36 citation statements)

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“…Beachrock is a sedimentary body formed in the intertidal zone due to the rapid cementation of sandy beach (Russell, 1962;Dalongeville and Sanlaville, 1984;Neumeier, 1999). Several factors contribute to the cementation of the sand in the intertidal zone, such as the sediment immobilization to allow its cementation, water over-saturation in calcium carbonate and good permeability favouring the water percolation (Blatt, 1979;Hays, 1979;Davaud and Strasser, 1984). Other factors contributing for the beachrock generation have been reported in world wide coasts among which are: (a) temperature (Russell and McIntire, 1965), (b) microbial activity (Neumeier, 1999), (c) water degasification (Calvet et al, 2003;Rey et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

Holocene sea level fluctuations and coastal evolution in the central Algarve (southern Portugal)

et al. 2007

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In Armação de Pêra Bay, southern Portugal, environmental changes during the Holocene can be interpreted based on the morphological and sedimentological similarities between older geomorphic features (cemented beach and dune rocks) and present coastal features. Using knowledge of the present beach and dune processes, we propose a two-step model for the evolution of Armação de Pêra Bay. First, during the rapid sea level rise between about 8 800 and 6 600 yr cal BP, the bay changed from a positive to a negative budget littoral cell and transgressive dunes formed, favoured by drought conditions. At about 5 000 yr cal BP, during a sea level maximum, beach width was less than the critical fetch and dunes stabilized and underwent cementation during the wetter Atlantic climatic event. The second phase of dune accumulation started at about 3 200 yr cal BP, due to a regression of sea level during which the bay changed back to a positive budget littoral cell in which beach width was greater than the critical fetch. Currently, the beach width is less than the critical fetch, dunes are inactive, and the sedimentary budget is negative due to sediment storage in local river systems.

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Section: Discussionmentioning

confidence: 99%

Holocene sea level fluctuations and coastal evolution in the central Algarve (southern Portugal)

et al. 2007

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“…opa l), and clay-mineral lattice structures. The solubility of disordered or amorphous Si polymorphs in soils at an ambient temperature and neutral pH is approximately 50 to 60 mg Si L -1 ; whereas that of quartz is much lower, commonly 3 to 7 mg Si L -1 (Alexander et al, 1954;Krauskopf, 1959;Blatt, 1979;Dapples, 1979;Hallmark et al, 1982). The liquid-phase of Si in soil is more complex, but agronomically important.…”

Section: Silicon In Soilmentioning

confidence: 99%

Silicon nutrition and sugarcane production: A review¹

Savant¹,

Korndörfer

Datnoff

et al. 1999

Journal of Plant Nutrition

333

219

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Silicon (Si) is one of the most abundant elements found in the earth's crust, but is mostly inert and only slightly soluble. Agriculture activity tends to remove large q uantities of Si from soil. Sugarcane is known to absorb more Si than any other mineral nutrient, accumulating approximately 380 kg ha -1 of Si, in a 12-month old crop. Sugarcane (plant growth and development) responses to silicon fertilization have been documented in some areas of the world, and applications on commercial fields are routine in certain areas. The reason for this plant response or yield increase is not fully understood, but several mechanisms have been proposed. Some studies indicate that sugarcane yield responses to silicon may be associated with induced resistance to biotic and abiotic stresses, such as disease and pest resistance, Al, Mn and Fe toxicity alleviation, increased P availability, reduced lodging, improved leaf and stalk erectness, freeze resistance, and improvement in plant water economy. This review covers the relationship of silicon to sugarcane crop production, including recommendations on how to best manage silicon in soils and plants, silicon interactions with others elements, and laboratory methodology for determining silicon in the soil, plant and fertilizer. In addition, a future research agenda for silicon in sugarcane is proposed.

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“…Silica precipitated from meteoric water (e.g. Blatt, 1979;McBride, 1989) and silica released from interbedded shales during compaction (e.g. Sullivan and McBride, 1991;Gluyas et al, 2000) can also be considered as potential silica sources.…”

Section: Sources Of Silica For Quartz Cementationmentioning

confidence: 99%

“…This dissolution occurred most likely during shallow burial when the sandstones were open to meteoric water through-flow (Marchand et al, 2000). Because meteoric water is usually supersaturated with silica (Blatt, 1979), the silica released from K-feldspar and sponge spicule dissolution may have been sufficient to explain precipitation of the small amounts of zone A quartz cements ( < 1%) in the reservoirs during shallow burial ( < 1.5 km). The bulk of the quartz cements (zones B and C) in the Brae Formation sandstones were precipitated during deeper burial and at higher temperatures (>70 jC).…”

Section: Sources Of Silica For Quartz Cementationmentioning

confidence: 99%

Pore water evolution in oilfield sandstones: constraints from oxygen isotope microanalyses of quartz cement

et al. 2002

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Diagenetic` Processes in Sandstones

Cited by 52 publications

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Holocene sea level fluctuations and coastal evolution in the central Algarve (southern Portugal)

Holocene sea level fluctuations and coastal evolution in the central Algarve (southern Portugal)

Silicon nutrition and sugarcane production: A review¹

Pore water evolution in oilfield sandstones: constraints from oxygen isotope microanalyses of quartz cement

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Diagenetic` Processes in Sandstones

Cited by 52 publications

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Holocene sea level fluctuations and coastal evolution in the central Algarve (southern Portugal)

Holocene sea level fluctuations and coastal evolution in the central Algarve (southern Portugal)

Silicon nutrition and sugarcane production: A review1

Pore water evolution in oilfield sandstones: constraints from oxygen isotope microanalyses of quartz cement

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Silicon nutrition and sugarcane production: A review¹