The creation of calcite microcrystals and microporosity through deep burial basinal flow processes driven by plate margin obduction – A realistic model?

Wenwen Wei, Fiona Whitaker, Hussein Hoteit, Volker Vahrenkamp

Research output: Contribution to journalArticlepeer-review

Abstract

Calcite microcrystals and associated microporosity are ubiquitous and extensively developed in Jurassic and Cretaceous carbonate sequences in the Middle East. Clumped isotope analyses of calcite microcrystals in the Lower Cretaceous Thamama-B strata in UAE reservoirs indicate temperatures of 60–90 °C and burial of 1.5–2.5 km suggesting formation synchronous with and updip of Late Cretaceous ophiolite obduction at the Eastern Arabian continental margin. Assuming that recrystallization of precursor calcite to calcite microcrystals requires initially undersaturation to drive dissolution/re-precipitation a basin-scale 2D reactive transport model (RTM) was constructed. The model is constrained by hydro-mechanical simulations and used to quantitatively evaluate the hypothesis that the formation of calcite microcrystals and associated microporosity is driven by expulsion of compaction fluids during rapid burial. The combined influence of fluid flux and cooling results in trace net calcite dissolution (porosity increase
Original languageEnglish (US)
Pages (from-to)105432
JournalMarine and Petroleum Geology
DOIs
StatePublished - Nov 15 2021

ASJC Scopus subject areas

  • Economic Geology
  • Oceanography
  • Stratigraphy
  • Geophysics
  • Geology

Fingerprint

Dive into the research topics of 'The creation of calcite microcrystals and microporosity through deep burial basinal flow processes driven by plate margin obduction – A realistic model?'. Together they form a unique fingerprint.

Cite this