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Ortega Menor, Lorena ; Luque del Villar, Francisco Javier ; Barrenechea, Edurne ; Rodas, Magdalena ; Millward, David ; Beyssac, Olivier | James Cook University School of Earth & Environmental Studies. Economic Geology Research Unit | 2009The volcanic-hosted graphite deposit at Borrowdale was formed through precipitation from C-O-H fluids. The G13C data indicate that carbon was incorporated into the mineralizing fluids by assimilation of carbonaceous metapelites of the Skiddaw Gr[...]texto impreso
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Alonso Azcárate, Jacinto ; Rodas, Magdalena ; Fernández-Díaz, Lourdes ; Bottrell, S.H. ; Mas Mayoral, José Ramón ; López Andrés, Sol | John Wiley & Sons, Ltd | 2001The low-grade metasediments of lthe Cameros Basin, northem Spain, host a number of deposits of spectacular quality pyrite mineralization. These formed during regional metamorphism and the pyrite crystals exhibit a wide range of morphologies. On[...]texto impreso
Fernández Barrenechea, José María ; Rodas, Magdalena ; Frey, Martín ; Alonso Azcárate, Jacinto ; Mas Mayoral, José Ramón | Blackwell Scientific publications | 2011The clay mineral assemblages of the Tithonian and Berriasian sediments (Tera and Oncala Groups) in the eastern part of the Cameros basin are investigated at seven localities. The lowest-grade assemblage, located on the southern border of the bas[...]texto impreso
Alonso Azcárate, Jacinto ; Rodas, Magdalena ; Fernández Barrenechea, José María ; Mas Mayoral, José Ramón | Blackwell Scientific publications | 2005Variations in clay mineral assemblages, changes in KuÈbler index (KI), and the chemical composition of chlorites are used to identify source areas in the lacustrine materials in the Lower Cretaceous Leza Limestone Formation of the Cameros Basin,[...]texto impreso
Artigas, Rosana ; Rodas, Magdalena ; Sánchez Jiménez, Carlos J. ; Mas Mayoral, José Ramón ; Dondi, Michele ; Arribas Mocoroa, José | Blackwell Scientific publications | 2005This work describes the possible use of thick Early Cretaceous clay deposits, which occur in the southern sector of the Sierra de la Demanda range, as raw materials in the manufacture of ceramic articles. The global mineralogical composition is [...]texto impreso
Luque del Villar, Francisco Javier ; Barrenechea, José F. ; Ortega Menor, Lorena ; Rodas, Magdalena ; Millward, David | The Economic Geology Research Unit | 2009The only two known graphite vein-deposits hosted by volcanic rocks (Borrowdale, United Kingdom, and Huelma, Southern Spain) show remarkable similarities and differences. The lithology, age of the magmatism and geodynamic contexts are distinct, b[...]texto impreso
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Alonso Azcárate, Jacinto ; Rodas, Magdalena ; Bottrell, S.H. ; Mas Mayoral, José Ramón ; Raiswell, R. | Sociedad Geológica de España | 1999Los materiales lutíticos de la Cuenca de Cameros presentan en su composición mineralógica muy pequeñas cantidades de sulfuros diseminados (pirita y pirrotita). La pirita sedimentaria aparece fundamentalmente formando framboides, cristales euhedr[...]texto impreso
Alonso Azcárate, Jacinto ; Rodas, Magdalena ; Fernández Barrenechea, José María ; Mas Mayoral, José Ramón | Sociedad Geológica de España | 1999Los materiales del Grupo Enciso pertenecen a la secuencia deposicional 5 (Barremiense superior - Aptiense inferior) de la Cuenca de Cameros. Esta cuenca presenta una potente serie de materiales de origen continental (hasta 9000 m) y el sector E [...]texto impreso
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