A5084928557- Geological and Geochemical Analysis
- earthquake and tectonic studies
- Geological and Geophysical Studies Worldwide
- High-pressure geophysics and materials
- Geochemistry and Geologic Mapping
- Hydrocarbon exploration and reservoir analysis
- Archaeological and Geological Studies
- Geological and Tectonic Studies in Latin America
- Archaeological and Historical Studies
- Geology and Paleoclimatology Research
- Geochemistry and Elemental Analysis
- CO2 Sequestration and Geologic Interactions
- Methane Hydrates and Related Phenomena
- Heavy metals in environment
- Geological Studies and Exploration
- Drilling and Well Engineering
- Paleontology and Stratigraphy of Fossils
- Mineralogy and Gemology Studies
- Geomagnetism and Paleomagnetism Studies
- Geological Formations and Processes Exploration
- Clay minerals and soil interactions
- Mineral Processing and Grinding
- Mediterranean and Iberian flora and fauna
- Mine drainage and remediation techniques
- Offshore Engineering and Technologies
Instituto Andaluz de Ciencias de la Tierra
2016-2025
Consejo Superior de Investigaciones Científicas
2012-2024
Universidad de Granada
2014-2023
Euskadiko Parke Teknologikoa
2022
Saitama Prefectural Industrial Technology Center
2020-2022
National Research Council
2021
University of Atlántico
2014
Northeastern Illinois University
2011
Lusíada University of Lisbon
2010
Woods Hole Oceanographic Institution
2001
The results of detailed textural, mineral chemical, and petrophysical studies shed new light on the poorly constrained fluid‐rock reaction pathways during retrograde serpentinization at mid‐ocean ridges. Uniformly depleted harzburgites dunites from Mid‐Atlantic Ridge 15°N show variable extents static serpentinization. They reveal a simple sequence reactions: olivine development typical mesh texture with serpentine‐brucite rims, followed by replacement centers serpentine brucite. rims relic...
We present first results of a petrographic study hydrothermally altered peridotites drilled during Ocean Drilling Program (ODP) Leg 209 in the 15°20′N fracture Zone area on Mid‐Atlantic Ridge (MAR). find that serpentinization is extensive at all drill sites. Where incomplete, phase relations indicate two major reaction pathways. One pyroxene to talc and tremolite, other olivine serpentine, magnetite, brucite. interpret these reactions light recent peridotite‐seawater experiments compositions...
On the basis of their structural and compositional characteristics, mafic rocks in Ronda peridotite are classified into four groups: group A (garnet-bearing rocks) occurring spinel tectonite domain; B (spinel websterites) along recrystallization front; C (Ti-rich pyroxenites) granular plagioclase domains; D (Cr-rich as composite layers front, dykes tectonites, single other domains. The domain represent vestiges an old, veined subcontinental lithosphere. groups were formed during a later...
The Ronda orogenic peridotite (southern Spain) contains a variety of pyroxene-rich rocks ranging from high-pressure garnet granulites and pyroxenites to low-pressure plagioclase–spinel websterites. 'asthenospherized' part the abundant layered websterites ('group C' pyroxenites), without significant deformation, that occur as swarms layers showing gradual modal transitions towards their host peridotites. Previous studies have suggested these formed by replacement refractory spinel Here, we...
We report the results of a geochemical study Jijal and Sarangar complexes, which constitute lower crust Mesozoic Kohistan paleo-island arc (Northern Pakistan). The complex is composed basal peridotites topped by gabbroic section made up mafic garnet granulite with minor lenses hornblendite granite, grading up-section to hornblende gabbronorite. metagabbro. gabbro gabbronorite have melt-like, light rare earth element (LREE)-enriched REE patterns similar those island basalts. Together...
The antigorite dehydration front preserved in the Cerro del Almirez (Nevado–Filábride Complex, Betic Cordillera, SE Spain) offers a unique opportunity to investigate high-pressure prograde breakdown of serpentinite (Atg-serpentinite) chlorite harzburgite (Chl-harzburgite; olivine + orthopyroxene tremolite) subduction setting. Our detailed mapping shows that transition between Atg-serpentinite and Chl-harzburgite narrow band transitional lithologies occurs consists...
Whole rock sulfur and oxygen isotope compositions of altered peridotites gabbros from near the 15°20′N Fracture Zone on Mid‐Atlantic Ridge were analyzed to investigate hydrothermal alteration processes test for a subsurface biosphere in oceanic basement. Three are identified. (1) High‐temperature (∼250–350°C) at Sites 1268 1271 is characterized by 18 O depletion (2.6–4.4‰), elevated sulfide‐S, high δ 34 S (up ∼2 wt% 4.4–10.8‰). Fluids derived high‐temperature (>350°C) reaction seawater...
The Ronda peridotite massif in Southern Spain shows a well-defined 'recrystallization' front that separates large-scale partial melting domain formed at the expense of continental lithospheric mantle from 'preserved' domain. To investigate processes allowing transient lithosphere–asthenosphere boundary to propagate mantle, we performed joint petrostructural and geochemical study an ∼2·5 km2 zone extending mylonites mark western limit massif. This emphasizes feedback between heat transfer,...
The processes active in the deep crust above an oceanic subduction zone during its evolution have been constrained through a detailed geochemical study (major and trace elements Sr, Nd Pb isotopes) of representative samples ∼30 km thick exhumed crustal section Cretaceous Kohistan island arc (Northern Pakistan). use both radiogenic isotopes reveals two distinct suites (suites A B) within Jijal–Patan–Kiru–Kamila (JPKK) complex. Suite is characterized by progressive enrichment 207Pb decrease...