2020
DOI: 10.3390/min10080651
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Evidence of Hydrocarbon-Rich Fluid Interaction with Clays: Clay Mineralogy and Boron Isotope Data from Gulf of Cádiz Mud Volcano Sediments

Abstract: Clay dehydration at great depth generates fluids and overpressures in organic-rich sediments that can release isotopically light boron from mature organic matter, producing 10B-rich fluids. The B can be incorporated into the tetrahedral sites of authigenic illite during the illitization of smectite. Therefore, the crystal-chemical and geochemical characterization of illite, smectite or interlayered illite–smectite clay minerals can be an indicator of depth (temperature) and reactions with the basin fluids. The… Show more

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Cited by 7 publications
(4 citation statements)
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References 113 publications
(182 reference statements)
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“…Argentina, Russia, Chile, Peru, China, Libya, Egypt, Iraq, Morocco, and Syria are other countries containing many boron deposits [119,120]. This element forms approximately 230 compounds, and natural and anthropogenic activities such as volcanoes, commercial uses, fertilizers, wastewater treatment plants, forest fires, and coal combustion can release it into the atmosphere [121]. Boron has very useful applications in some industries such as the manufacture of glass and ceramics, fertilizer and detergent [122][123][124][125].…”
Section: Boronmentioning
confidence: 99%
“…Argentina, Russia, Chile, Peru, China, Libya, Egypt, Iraq, Morocco, and Syria are other countries containing many boron deposits [119,120]. This element forms approximately 230 compounds, and natural and anthropogenic activities such as volcanoes, commercial uses, fertilizers, wastewater treatment plants, forest fires, and coal combustion can release it into the atmosphere [121]. Boron has very useful applications in some industries such as the manufacture of glass and ceramics, fertilizer and detergent [122][123][124][125].…”
Section: Boronmentioning
confidence: 99%
“…Other processes that could be related to these structures are the precipitation of authigenic minerals, such as carbonate minerals (Aloisi et al, 2002;Pierre et al, 2012;Pereira et al, 2018) and the clay mineral dehydration (i.e. smectite-illite transformation) (Brown et al, 2001;Dählmann and De Lange, 2003;Martos-Villa et al, 2020). These happen due to the geochemical interactions with the adjacent sediments and rocks of the upward fluid provided by the MVs, which may alter the chemistry of the pore water (Hensen et al, 2007).…”
Section: Introductionmentioning
confidence: 99%
“…One of the papers focuses on inclusions remaining from a high P metamorphism in rocks affected by a complex metamorphic history, which includes prograde as well as retrograde processes [59]; another [60], with garnet nucleation and growth, which record the initial steps of dehydration within the subduction zone. Two of them present mineral transformations in the smectite-illite system during diagenesis, either of chemical [61] or burial [28] origins, and a third the incorporation of B, coming from the transformation of organic matter, into the illitic tetrahedral layers [62]. The last one [63] uses the clay transformations and related parameters to establish the pressure/temperature conditions in a key region for the interpretation of the Eurasia-Africa collision in Cenozoic times.…”
mentioning
confidence: 99%
“…Martos-Villa et al present B-content and its isotopic composition of clay samples [62], together with their detailed mineralogy, in mud-volcano sediments of the Gulf of Cadiz (Atlantic Coast between Europe and Africa). The data demonstrate that B is fixed in the illitic tetrahedral layer during the diagenetic smectite to illite reaction.…”
mentioning
confidence: 99%