ub.xmlui.mirage2.page-structure.muninLogoub.xmlui.mirage2.page-structure.openResearchArchiveLogo
    • EnglishEnglish
    • norsknorsk
  • Velg spraaknorsk 
    • EnglishEnglish
    • norsknorsk
  • Administrasjon/UB
Vis innførsel 
  •   Hjem
  • Universitetsbiblioteket
  • Artikler, rapporter og annet (UB)
  • Vis innførsel
  •   Hjem
  • Universitetsbiblioteket
  • Artikler, rapporter og annet (UB)
  • Vis innførsel
JavaScript is disabled for your browser. Some features of this site may not work without it.

Boron concentrations and isotopic compositions in methane-derived authigenic carbonates: Constraints and limitations in reconstructing formation conditions

Permanent lenke
https://hdl.handle.net/10037/23944
DOI
https://doi.org/10.1016/j.epsl.2021.117337
Thumbnail
Åpne
article.pdf (1.631Mb)
Publisert versjon (PDF)
Dato
2021-12-23
Type
Journal article
Tidsskriftartikkel
Peer reviewed

Forfatter
Hong, Wei-Li; Lepland, Aivo; Kirsimäe, Kalle; Crémière, Antoine; Rae, James W.B.
Sammendrag
The boron content and isotopic composition (δ11B), of marine carbonates have the potential to constrain CO2 chemistry during carbonate growth conditions. However, obtaining and interpreting boron compositions from authigenic carbonates in geological archives present several challenges that may substantially limit their application. In particular, contamination from non-carbonate phases during sample preparation must be carefully avoided, and a variety of controls on boron composition during authigenic growth conditions must be evaluated. To advance understanding of the use and limitations of boron in authigenic carbonates, we present data and modelling results on methane-derived authigenic carbonate (MDAC), a by-product of microbially mediated anaerobic oxidation of methane, taken from three cold seep sites along the Norwegian margin. We present a novel sequential leaching method to isolate the boron signals from the micritic (Mg-calcite) and cavity-filling (aragonitic) MDAC cements in these complex multi-phase samples. This method successfully minimizes contamination from non-carbonate phases. To investigate the factors that could potentially contribute to the observed boron signals, we construct a numerical model to simulate the evolution of MDAC δ11B and B/Ca ratios over its growth history. We show that diagenetic fluid composition, depths of precipitation, the physical properties of sediments (such as porosity), and mineral surface kinetics all contribute to the observed boron compositions in the different carbonate cements. While broad constraints may be placed on fluid composition, the multiple competing controls on boron in these diagenetic settings limit the ability to place unique solutions on fluid CO2 chemistry using boron in these authigenic carbonates.
Forlag
Elsevier
Sitering
Hong H, Lepland A, Kirsimäe K, Crémière A, Rae JW. Boron concentrations and isotopic compositions in methane-derived authigenic carbonates: Constraints and limitations in reconstructing formation conditions. Earth and Planetary Science Letters. 2021;579:1-10
Metadata
Vis full innførsel
Samlinger
  • Artikler, rapporter og annet (UB) [3245]
Copyright 2021 The Author(s)

Bla

Bla i hele MuninEnheter og samlingerForfatterlisteTittelDatoBla i denne samlingenForfatterlisteTittelDato
Logg inn

Statistikk

Antall visninger
UiT

Munin bygger på DSpace

UiT Norges Arktiske Universitet
Universitetsbiblioteket
uit.no/ub - munin@ub.uit.no

Tilgjengelighetserklæring