Paleoenvironment Evolution Proxy in Carbonates: Sedimentary Geochemistry

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Geochemistry and Geochronology".

Deadline for manuscript submissions: closed (25 January 2025) | Viewed by 1010

Special Issue Editor


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Guest Editor
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China
Interests: carbonate sedimentology and reservoir geology; microbial carbonate; event deposition

Special Issue Information

Dear Colleagues,

The aim of this Special Issue, “Paleoenvironment Evolution Proxy in Carbonates: Sedimentary Geochemistry”, is to present the latest research on the application of sedimentary geochemistry methods to reconstruct the paleoenvironmental conditions and changes in carbonate rocks. Carbonates are important archives of Earth’s history, as they record the interactions between the biosphere, atmosphere, hydrosphere, and lithosphere over different timescales. Sedimentary geochemistry can provide valuable information on the sources, transport, deposition, diagenesis, and preservation of carbonates, as well as the paleoclimate, paleoecology, paleobiology, and paleogeography of carbonate depositional environments.

The scope of the Special Issue covers a wide range of topics related to carbonate sedimentary geochemistry, such as:

(1) Trace elements and isotopes as indicators of paleoweathering, paleosalinity, paleotemperature, paleoproductivity, paleoredox, and paleoceanography in carbonates.

(2) Whole-rock mineral and clay mineral analyses as proxies for carbonate provenance, sedimentary facies, and diagenetic alterations.

(3) Organic geochemistry and biomarkers as tools for tracing the origin, evolution, and diversity of organic matter in carbonates.

(4) Statistical analyses and modeling of large-scale sedimentary geochemical datasets to reveal global and regional patterns and trends of environmental evolution in carbonates.

(5) Case studies of carbonate sedimentary geochemistry from different geological periods, regions, and settings (e.g., marine, lacustrine, fluvial, glacial, etc.).

The Special Issue welcomes original research articles, reviews, and short communications that contribute to the advancement of carbonate sedimentary geochemistry and paleoenvironmental reconstruction. We also encourage interdisciplinary and collaborative studies that integrate sedimentary geochemistry with other disciplines, such as sedimentology, stratigraphy, petrology, paleontology, geochronology, geophysics, and geoengineering.

Dr. Jinmin Song
Guest Editor

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Keywords

  • carbonate rocks
  • paleoenvironment evolution
  • diagenesis
  • depositional environments
  • geochemistry
  • stratigraphy

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Published Papers (1 paper)

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Research

43 pages, 41722 KiB  
Article
Massive Dolomitization of Interior and Slope to Basin-Margin Facies of the Triassic Yangtze Platform Through Superposed Earth-Surface and Burial Mechanisms, Nanpanjiang Basin, South China
by Nathaniel S. Ledbetter Ferrill, Xiaowei Li, Josephine Tesauro, Madison Sears, George M. Bradley, Arianna Hilbert, Eryn Carney, Justice Saxby, Neda Mobasher, Brian M. Kelley, E. Troy Rasbury, Kathleen M. Wooton, Jason D. Kirk, John A. Luczaj and Daniel J. Lehrmann
Minerals 2025, 15(3), 324; https://doi.org/10.3390/min15030324 - 19 Mar 2025
Viewed by 514
Abstract
Triassic strata of the Yangtze Platform at Guanling contain a dolomitized interior, undolomitized margin, and partially dolomitized slope to basin margin. Dolomitized microbial laminate caps of peritidal cycles and massive dolomite with associated evaporite nodules and solution collapse breccias are consistent with penecontemporaneous [...] Read more.
Triassic strata of the Yangtze Platform at Guanling contain a dolomitized interior, undolomitized margin, and partially dolomitized slope to basin margin. Dolomitized microbial laminate caps of peritidal cycles and massive dolomite with associated evaporite nodules and solution collapse breccias are consistent with penecontemporaneous tidal flat and evaporative dolomitization in the platform interior. The preferential dolomitization of the slope and basin margin (up to 7 km basinward of the margin), dolomitization along fractures, and selective dolomitization of the matrix in slope breccia that diminishes toward the margin are interpreted to have resulted from the incursion of basin-derived fluids during burial. Integrated analysis of fluid-inclusion microthermometry, oxygen, carbon, and strontium isotopes, trace element geochemistry, U-Pb age dates of carbonate phases, and burial history support the recrystallization of interior dolomite and slope to basin-margin dolomitization by brines at high temperatures during burial. The Yangtze Platform at Guanling provides an excellent example of widespread stratiform dolomitization resulting from the superposition of multiple mechanisms, including penecontemporaneous dolomitization by evaporative seawater brines, high-temperature dolomitization of the slope and basin margin by basinal brines, and high-temperature recrystallization of dolomite by brines during burial. This study provides an example that suggests that widespread stratiform dolomite may result from superposed Earth surface and high-temperature burial dolomitization processes and provides a valuable analog for other carbonate platforms in which the margin remains undolomitized while the interior and basin margin are dolomitized. Similar mechanisms likely contributed to the widespread dolomitization of platforms across the Nanpanjiang and Sichuan basins. Full article
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