RT Journal Article
T1 Terrestrial hot-spring Co-rich Mn mineralization in the Pliocene-Quaternary Calatrava Region (central Spain)
A1 Crespo, A.
A1 Lunar Hernández, María Del Rosario
AB Central Spain hosts a series of high-Co (up to 1.7% Co) Mn mineralizations displaying a variety of morphologies: spring aprons and feeders, pisolitic beds, wad beds and tufa-like replacements of plants and plant debris. The Mn mineralogy consist of cryptomelane, lithiophorite, birnessite and todorokite. The spring apron deposits formed in close proximity to Pliocene volcanic rocks (alkaline basaltic lava flows and pyroclastics) belonging to the so-called Calatrava Volcanic Field. The spring aprons are found along or near to normal faults bounding small basins and topographic highs. Mn tufa-like deposits are found near to the spring sources, while both pisolitic and wad beds are clearly distal facies occuring well within the Pliocene basins. The two latter are interbedded with clastic lacustrine and fluvial sediments. Collectively, these deposits contain a complex suite of Mn-(Co) mineralization ranging from proximal, hot-spring-type Mn facies, grading into more distant sedimentary, stratabound mineralization. Volcanism, basin formation and Mn deposition took place within a failed rift environment which triggered hydrothermal activity and Mn-(Co) deposition as proximal (near to the volcanic axes) and distal (of sedimentary affinities, within the basins) facies.
PB The Geological Society
SN 0305-8719
YR 1997
FD 1997
LK https://hdl.handle.net/20.500.14352/122570
UL https://hdl.handle.net/20.500.14352/122570
LA eng
NO Crespo, A., & Lunar, R. (1997). Terrestrial hot-spring co-rich mn mineralization in the pliocene-quaternary calatrava region(Central spain). Geological Society, London, Special Publications, 119(1), 253-264. https://doi.org/10.1144/GSL.SP.1997.119.01.16
NO Empresa Nacional Adaro de Investigaciones Mineras (España)
NO Ministerio de Educación y Ciencia (España)
DS Docta Complutense
RD 24 ene 2026