2026-08-20T06:02:34Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/528102024-07-23T17:22:43Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
Caja Rodríguez, Miguel Ángel
author
Al-Aasm, Ihsan
author
Marfil Pérez, Rafaela
author
Tsige Beyene, Meaza
author
Martín Crespo, Tomás
author
Salas, Ramón
2023-06-20T12:55:09Z
2023-06-20T12:55:09Z
2003
0375-6742
10.1016/S0375-6742(03)00045-1
https://hdl.handle.net/20.500.14352/52810
https://doi.org/10.1016/S0375-6742(03)00045-1
In the western part of the Penyagolosa subbasin (Maestrat Basin, Spain), carbonate cementation occludes fractures and infills stylolites in Tithonian-Berriasian limestones. Field relationships, petrography, cathodoluminesence and geochemical analyses (microprobe, fluid inclusions, oxygen, carbon and strontium isotopes) of the carbonate cements show that the paragenetic sequence includes (A) calcite cements in echelon tension gashes (- 11.37 ‰ δ18O VPDB). 03) Scarce isolated rhombic dolomite replacement cement. (C) Saddle dolomite replacement cement with fluid inclusions that are characterized by high salinity (21.5 to 23.5% wt. eq. NaC1), high temperatures (Th 110-155 °C) and similar negative values of oxygen isotopes (- 11.27 ‰ δ18 O VPDB). (D) Calcite replacing (dedolomite) saddle and rhombic dolomite (- 8.61 to - 6.76 ‰ δ18 O VPDB and -4.38 to + 0.07 ‰ δ13C VPDB). (E) Calcite cement filling vertical fractures. They have the highest Th (160-260 °C), negative values of oxygen isotopes (- 9.97 to -13.44 ‰ δ18 O VPDB). (F) Calcite cement filling bed-parallel stylolites ( - 8.81‰ δ18 O VPDB). This paragenetic sequence reflects multiple phases of fracture-controlled carbonate cements. The first stage calcite is related to syn-sedimentary rifting of the Late Jurassic-Early Cretaceous and progressive burial depth. The later phases of dolomite and calcite in vertical veins are considered hydrothermal in origin and indicate a mix of saline waters, possibly derived from the underlying Triassic and Liassic evaporites, with deep circulating meteoric water with higher temperature than the surrounding rocks and related to the regional Alpine compression.
eng
Atribución-NoComercial-SinDerivadas 3.0 España
Multiphase carbonate cementation related to
fractures in the Upper Jurassic limestones, Maestrat Basin
(Iberian Range, Spain)
journal article
URL
https://docta.ucm.es/bitstreams/2e6c6f6c-119d-46f9-acbc-5a26a7322508/download
File
MD5
f14561dc3f700a87f9cd9c29929b4453
647847
application/pdf
0451.pdf
URL
https://docta.ucm.es/bitstreams/5c7c9470-11c0-4ef3-a5e6-b96622132767/download
File
MD5
2a3be4cde122e99f37827703f07aca64
20075
text/plain
0451.pdf.txt