Linda Daniele

Relationship between Dolomite Textures and Formation Temperature - Insights from the Riópar Area (Betic basin, SE Spain)

This study reports textures and homogenization temperatures of primary fluid inclusions on dolomites hosted in Upper Jurassic to Lower Cretaceous age carbonate sequence from the Riopar area (Mesozoic Prebetic Basin, SE Spain). Five dolomite texture-types have been identified: i) planar subhedral replacive dolomite (ReD); ii) transition between planar subhedral to euhedral dolomite (ReD-SuD); iii) planar euhedral sucrosic dolomite (SuD); iv) non-planar cloudy saddle dolomite (SaD-I); and v) non-planar clear saddle dolomite (SaD-II). Fluid inclusions in ReD-SuD dolomite show a Th mode value of 205oC, while SaD-I and SaD-II show Th mode values of 235oC and 195oC respectively. Our research indicates that planar and non-planar dolomite textures are formed at high-temperatures under hydrothermal conditions in deep-burial diagenetic environments, unsupporting the accepted idea that planar dolomites are formed under temperatures around or less than 50-60oC in shallow-burial diagenetic environments.

An oceanographic survey for the detection of a possible Submarine Groundwater Discharge in the coastal zone of Campo de Dalias, SE Spain

The Campo de Dalias, in south-eastern Spain, is an area of important economic activity linked to agriculture and tourism, both of which have exacted fierce exploitation of aquifer water. The recovery of one of these aquifers in recent years has even triggered fresh water discharges into the sea. An oceanographic survey was undertaken along the coastline in order to detect possible Submarine Groundwater Discharge (SGD). Salinity and temperature data were collected on the seasurface, as well as in 51 vertical profiles. These results suggest the existence of a thermohaline anomaly in the area of the port of Aguadulce possibly due to submarine groundwater discharges.