Boron content of sediments as a tool in facies analysis

Harder, Hermann

doi:10.1016/0037-0738(70)90009-6

Cited by 141 publications

(46 citation statements)

References 25 publications

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“…This relationship between B concentration and salinity was thought to be preserved in estuarine shales (Frederickson and Reynolds, 1959;Landergren, 1963 ) : clay minerals being a major geochemical sink for B (Schwartz et al, 1969). Subsequent work revealed that additional factors influenced B uptake by clay minerals, compromising the reliability of B in shales as a paleosalinity proxy (Harder, 1970).…”

Section: Paleosalinitymentioning

confidence: 99%

Paleosalinities in ancient brackish water systems determined by 87Sr/86Sr ratios in carbonate fossils: A case study from the Western Canada sedimentary basin

Holmden

Creaser

Muehlenbachs

1997

Geochimica et Cosmochimica Acta

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Section: Paleosalinitymentioning

confidence: 99%

Paleosalinities in ancient brackish water systems determined by 87Sr/86Sr ratios in carbonate fossils: A case study from the Western Canada sedimentary basin

Holmden

Creaser

Muehlenbachs

1997

Geochimica et Cosmochimica Acta

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“…Thus, a K/B ratio of 65 would suggest that pure celadonite contains roughly 900 ppm B, less than half the 2000 ppm predicted by Harder (1970) for micas precipitated from seawater.…”

Section: Boronmentioning

confidence: 94%

“…The mechanism by which B is taken up by celadonite and other mica minerals (e.g., illite) has been discussed in detail by Harder (1970). In general, the charge of the B atom and its size (0.23 Å) make it probable that the B atom replaces aluminum in the highly accessible outer tetrahedral positions.…”

Section: Rbmentioning

confidence: 99%

“…In general, the charge of the B atom and its size (0.23 Å) make it probable that the B atom replaces aluminum in the highly accessible outer tetrahedral positions. Leaching studies have shown that most of the B is not mobilized by acid treatments unless acids that dissolve the mineral (HF) are used (Harder, 1970). In addition, infrared studies of B-rich clays (Stubican and Roy, 1962) reveal the presence of B in tetrahedral positions.…”

Section: Rbmentioning

confidence: 99%

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B, Li, and Associated Trace Element Chemistry of Alteration Minerals, Holes 597B and 597C

Berndt¹,

Seyfried²

1986

Initial Reports of the Deep Sea Drilling Project

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B, Li, and other trace elements were analyzed in samples from 12 celadonite and smectite-rich veins from oxidative and non-oxidative alteration zones in basalts from Holes 597B and 597C. The oxidative alteration zones are characterized by celadonite and Fe-oxyhydroxide and conspicuously high K, Rb, and B concentrations. In contrast, the non-oxidative alteration zones are characterized by Mg-rich smectite (saponite), talc, and calcite and high Li concentrations. Neither B nor Li reaches high concentrations in high-Al high-Ti veins that appear to have formed by replacement of basalt. B, Li, and Rb enrichments in vein assemblages of low-temperature origin reflect an important removal mechanism from seawater for these species.The alteration zones characterized by Mg-smectite and talc are strikingly enriched in Ni. There is a correlation between the Ni-enriched smectite and the presence of olivine in the host basalt; the correlation indicates that olivine alteration may be the source of the Ni. Other transition elements, including Cr, Mn, Co, Cu, and Zn, are often found in significant concentrations in the celadonite and high-Mg smectite veins, but their enrichments are neither as large nor as consistent as the enrichment of Ni in the Mg-smectite veins.Two high-Al, high-Ti vein assemblages of smectite and noncrystalline phases have transition element abundances similar to those of the host basalts but are relatively depleted in Cu and Cr. The material in these veins may have formed by replacement with concomitant release of Cu and Cr to circulating aqueous fluids.

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“…4), ya que dichos elementos (tras realizar las correcciones pertinentes) pueden considerarse respectivamente como indicadores de las condiciones de salinidad y confinamiento que reinaban en las cuencas de sedimentación (Goldschmit & Peters, 1932;Degens et al, 1958;Harder, 1970y Mosser, 1980para el B y Millot, 1964 para el Mg); entendido el confinamiento, en el sentido definido por Millot (1964), como el aumento de la concentración de iones en solución procedentes del lavado de rocas, producido en zonas mal drenadas como consecuencia de ser la evaporación la responsable de mantener el nivel hídrico. Algunas de las consideraciones a tener en cuenta para una adecuada utilización de un elemento como indicador de una condición del medio de sedimentación son el conocimiento de la mineralogía, del tamaño de grano de los minerales y de la posible variación de condiciones físico-químicas tales como pH, nivel de carbonatos y temperatura, así mismo los análisis han de realizarse en niveles que no contengan sedimentos reciclados.…”

Section: Medio De Depósitounclassified

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Bellón¹,

Cardona²,

Mosser³

et al. 1995

Estud. geol.

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Se ha realizado un estudio geoquímico de la fracción arcillosa de los sedimentos miopliocenos y de la muestra total de rocas metamórficas de los relieves adyacentes con el fin de determinar las características geoquímicas del medio de sedimentación y la influencia de las rocas circundantes sobre los sedimentos. Tras relacionar elementos quí-micos con rocas y minerales mediante un (ACP), se ha realizado una clasificación jerár-quica ascendente (CJA), que ha reagrupado las muestras con características geoquímicas similares en 8 clases. La comparación gráfica de su composición geoquímica media pone de manifiesto una clara relación genética entre los sedimentos y las rocas metapelíticas de la Cordillera Bética oriental, siendo la influencia de gneises, rocas carbonatadas metamórficas y metabasitas muy localizada o inexistente. Finalmente, los contenidos de B y Mg nos han permitido distinguir varios tipos de medios de depósito que presentan diferentes grados de confinamiento y que, en relación con los cambios del nivel del mar producidos durante la crisis messiniense, se han visto influenciados sucesivamente por aguas marinas y continentales.Palabras clave: Geoquímica, análisis multivariante, minerales de la arcilla, roca madre, condiciones paleoambientales, Mioceno-Plioceno, cuenca de Sorbas, Cordilleras Béticas. ABSTRACTThe geochemistry of the <2 Ilm fractions of the Mio-Pliocene sediments and the bulk sample of the surrounding metamorphic rocks was studied in arder to characterize the geochemical environment during the sedimentation and to trace the influence of the surrounding rocks on the sediments. After making the relationships among the chemical elements and the minerals or the rocks by Principal Component Analysis (PCA), it has been carried out a Hierarchical Ascending Classification (HAC) which regroups the samples with similar geochemical characteristics into 8 classes. Graphical comparison of mean geochemical composition among HAC groups provides a better identification of inherited similarities between sorne sediments and the metapellitic rocks in the eastern Betic Cordilleras. Gneises, carbonated and metabasic rocks influence is inexistent or very located. Finally B and MgO contents have allowed us to distinguish different types of deposit environments with a higher or lower degree of confinement and with influence of sea-ar continental waters.

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Boron content of sediments as a tool in facies analysis

Cited by 141 publications

References 25 publications

Paleosalinities in ancient brackish water systems determined by 87Sr/86Sr ratios in carbonate fossils: A case study from the Western Canada sedimentary basin

Paleosalinities in ancient brackish water systems determined by 87Sr/86Sr ratios in carbonate fossils: A case study from the Western Canada sedimentary basin

B, Li, and Associated Trace Element Chemistry of Alteration Minerals, Holes 597B and 597C

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