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LUMINESCENCE SUCCESSION: Lo. Cambrian Forteau Fm., Southern Labrador, Canada. Cavity-filling calcite cements in a reef limestone with cathodoluminescent zoning showing a typical temporal succession of non-luminescence, bright luminescence, and dull luminescence. That succession reflects temporal geochemical changes allowing variations in incorporation of Mn2+ (a CL-exciting ion) and Fe2+ (a CL-quenching ion). Late-stage burial fluids generally are depleted in Mn and enriched in Fe, producing dull luminescence. CL, isotope geochemistry, and fluid inclusion geothermometry are essential adjuncts to petrography in understanding burial diagenesis. Chapter 22: CARBONATE DIAGENESIS: Meo- and Telogenetic Burial Diagenesis; p. 369. Memoir 77: A Color Guide to the Petrography of Carbonate Rocks: Grains, textures, porosity, diagenesis by Peter A. Scholle and Dana S. Ulmer-Scholle
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LUMINESCENCE SUCCESSION: Lo. Cambrian Forteau Fm., Southern Labrador, Canada. Cavity-filling calcite cements in a reef limestone with cathodoluminescent zoning showing a typical temporal succession of non-luminescence, bright luminescence, and dull luminescence. That succession reflects temporal geochemical changes allowing variations in incorporation of Mn2+ (a CL-exciting ion) and Fe2+ (a CL-quenching ion). Late-stage burial fluids generally are depleted in Mn and enriched in Fe, producing dull luminescence. CL, isotope geochemistry, and fluid inclusion geothermometry are essential adjuncts to petrography in understanding burial diagenesis. Chapter 22: CARBONATE DIAGENESIS: Meo- and Telogenetic Burial Diagenesis; p. 369. Memoir 77: A Color Guide to the Petrography of Carbonate Rocks: Grains, textures, porosity, diagenesis by Peter A. Scholle and Dana S. Ulmer-Scholle