2026-06-29T16:41:49Zhttps://docta.ucm.es/rest/oai/request
oai:docta.ucm.es:20.500.14352/518012023-08-25T11:30:30Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense author Benito Moreno, María Isabel author Lohmann, Kyger C. author Mas Mayoral, José Ramón 2023-06-20T11:10:51Z 2023-06-20T11:10:51Z 2006 1527-1404 10.2110/jsr.2006.042 https://hdl.handle.net/20.500.14352/51801 http://jsedres.sepmonline.org/ Burial diagenesis of the Upper Jurassic Torrecilla Reef Complex is recorded by a complex paragenetic sequence initiated with emplacement of ferroan calcite cements and followed by the precipitation of ferroan saddle dolomite. Ferroan calcite cements contain micro-sized dolomite inclusions (MDIs). Elemental and isotopic compositions of MDIs are virtually indistinguishable from those of ferroan saddle dolomite cements. In contrast to other scenarios for the formation of microdolomite inclusions that invoke either a magnesian calcite precursor or incomplete dedolomitization, the paragenetic relations of MDIs to their host ferroan calcite and their geochemical composition implies formation by fine-scale burial replacement of ferroan calcite by fluids associated with the emplacement of ferroan saddle dolomite. Petrographic observations and mass-balance considerations suggest that it is unlikely that Fe and Mg incorporated into ferroan dolomite could have been derived from the cannibalization of the reefal host rock. Rather, dolomitizing fluids were likely associated with the hydrothermal, low-grade metamorphic event that affected the Cameros Basin during the middle to Late Cretaceous. Interaction of these fluids with preexisting burial cements produced MDIs in the ferroan calcites. eng Micro-Sized Dolomite Inclusions in Ferroan Calcite Cements Developed During Burial Diagenesis of Kimmeridgian Reefs, Northern Iberian Basin, Spain. journal article URL https://docta.ucm.es/bitstreams/b94a465e-2c3a-41b1-8411-06db5d54fd03/download File MD5 da4af5ba3b1113f314c531b447e705e1 976330 application/pdf 472.full.pdf URL https://docta.ucm.es/bitstreams/eb7ed35b-f33f-4d1c-a182-075bc30a0479/download File MD5 f436ae7ae5b739607e4b3860ede61308 55043 text/plain 472.full.pdf.txt