Szczegóły publikacji
Opis bibliograficzny
Pore water chemical constraints on petrophysical shifts following biosilica diagenesis / S. Varkouhi, N. J. Tosca, J. A. Cartwright, Z. Guo, P. Kianoush, A. JURKOWSKA // Geochemical Perspectives Letters ; ISSN 2410-339X. — 2024 — vol. 32, s. 39–45. — Bibliogr. s. 44–45, Abstr. — Publikacja dostępna online od: 2024-10-30
Autorzy (6)
- Varkouhi S.
- Tosca N. J.
- Cartwright J. A.
- Guo Z.
- Kianoush P.
- AGHJurkowska Agata
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 162998 |
|---|---|
| Data dodania do BaDAP | 2025-09-26 |
| Tekst źródłowy | URL |
| DOI | 10.7185/geochemlet.2440 |
| Rok publikacji | 2024 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Geochemical Perspectives Letters |
Abstract
Silica diagenesis commonly induces marked petrophysical changes to biosiliceous sediments across the sub-seafloor opal-A to opal-CT transition zone (TZA/CT). Integration of pore water thermodynamics with textural and mineralogical data reveals that sediments in the TZA/CT drilled at ODP Site 794 are sharply compacted via opal-A dissolution and matrix collapse. The porosity decline is linked to silica solubility through pore water saturation states with opal-A and opal-CT. A dissolved silicon (DSi) drop near the depth of the petrophysical shift implies that fluid expulsion removes the DSi produced by opal-A dissolution. Production of opal-CT from the pore fluid that is thermodynamically equilibrated with solubility of this silica mineral phase however slightly impacts the anomalous compaction at the TZA/CT.