José Francisco Molina

José Francisco Molina
University of Granada | UGR · Department of Mineralogy and Petrology

PhD

About

78
Publications
22,729
Reads
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2,352
Citations
Citations since 2016
34 Research Items
1364 Citations
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
2016201720182019202020212022050100150200250
Additional affiliations
July 2007 - present
University of Granada
Position
  • Professor (Associate)
July 1999 - September 2000
University of Oslo
Position
  • TMR researcher
July 1996 - June 1998
University of Milan
Position
  • Postdoctoral Research

Publications

Publications (78)
Article
Full-text available
Zircon is a ubiquitous accessory phase that carries important isotopic and geochemical information. Experimental work indicates that zircon solubility in silicate melts increases exponentially with decreasing silica; accordingly, crystallizing mafic magmas would only precipitate zircon from the last drops of residual melts, likely of granophyric co...
Article
Full-text available
Zircon derived from crustal rocks can survive dissolution into hot basalts during magma hybridization and rock assimilation if it is shielded as an inclusion phase in early-formed phenocrysts or in minerals from non-disaggregated xenoliths. Under these conditions, zircon can be thermally shocked, triggering recrystallization of metamict domains and...
Article
Detailed textural and compositional study of calc-alkaline lamprophyres and minettes from Zeneta, SE Spain Neogene Volcanic Province (NVP) are used to unravel the magma sources and differentiation processes involved in their formation. The presence of xenocrysts of various origins indicates a hybrid nature involving mantle-derived alkaline lamproit...
Article
Full-text available
This study of Sr-Nd initial isotopic ratios of plutons from the North Patagonian batholith (Argentina and Chile) revealed that a secular evolution spanning 180 m.y., from the Jurassic to Neogene, can be established in terms of magma sources, which in turn are correlated with changes in the tectonic regime. The provenance and composition of end-memb...
Article
This study of Sr-Nd initial isotopic ratios of plutons from the North Patagonian batholith (Argentina and Chile) revealed that a secular evolution spanning 180 m.y., from the Jurassic to Neogene, can be established in terms of magma sources, which in turn are correlated with changes in the tectonic regime. The provenance and composition of end-memb...
Article
Full-text available
The Ossa-Morena Zone (OMZ), SW Iberia, has numerous Lower Carboniferous compositionally zoned plutons that formed in a Variscan intra-orogenic extensional setting. This magmatism shows a wide compositional variation comprising alkaline, transitional, and calc-alkaline suites. The calc-alkaline suite was produced by hybridization of alkaline magmas...
Article
Full-text available
Zircon inheritance is a common phenomenon in igneous rocks, although more frequent in granitoids. Zircons inherited from granite magmas mostly come from the source, not from wall rocks or xenoliths. Consequently, they can provide invaluable information about the source materials, melting temperature, and melt segregation conditions. Miller et al. (...
Article
Full-text available
The classical Al-in-hornblende barometer has been very successful in determining the depth of intrusion of the metaluminous cordilleran granitoid plutons that bear the buffering assemblage at near solidus conditions: horn-blende-biotite-plagioclase-orthoclase-quartz-sphene-two Fe-Ti-oxides (or one Fe-Ti oxide + epidote)-melt-vapor (e.g., [1–3]). [....
Article
The central zone of the Iberian Massif contains abundant granitic batholiths, mostly consisting of peraluminous granodiorites to granites, with minor volumes of high-Mg and high-K ultramafic, mafic, and intermediate rocks (UMI rocks), belonging to two associations: vaugnerites and appinites. The UMI rocks crop out as small stocks within anatectic d...
Article
The Characato suite (Achala batholith, Sierras Pampeanas, Argentina), consists of at least six granitic facies with affinities of F-rich moderately to strongly peraluminous A-type granites. The two more extensive facies (Facies 1 and 2) and a minor one (Facies 5) would represent at least three batches of magma generated by partial melting from the...
Article
The amphibole-plagioclase NaSi-CaAl exchange thermometer by Holland and Blundy (1994) (expression B) has been extensively applied to calcic amphibole-bearing assemblages from metamorphic and igneous rocks, whereas the more recent calibrations of the amphibole-only thermometer by Ridolfi and Renzulli (2012) (expression 2) and Putirka (2016) (express...
Article
The Oulad Dlim Massif, located west of the Archean part of the Reguibat Rise of the West African Craton, has an areal extent close to 36,000 km². Despite its tectonic importance, as it may have been the main indenter during the late Paleozoic Laurentia-Gondwana collision that formed supercontinent Pangea, this region has remained unstudied for a lo...
Article
The presence of zircon xenocrysts in Mid Atlantic Ridge (MAR) rocks poses essential questions concerning the path they have followed from their sources, how they have survived transport through the mantle, and why they are much more abundant than in any other ocean. Sixteen out of twenty-five seafloor samples collected between S 21° to N 42° contai...
Poster
Full-text available
The Oulad Dlim Massif is a huge crystalline complex located west of the Archean TTGs of the Reguibat Shield (northwestern part of the West African Craton). This 100 km wide massif comprises a large variety of strongly metamorphosed and tectonized rocks with ages from Lower Devonian to Archean. In the central part of this massif and flanked by Arche...
Article
Magmas generated by melting of the continental crust and the mantle during collapse of collisional orogenic belts are compositionally heterogeneous and preserve evidence for mixing of the two magma sources. Deciphering the components of hybrid magmas is the key for assessing the relative contributions of mantle and crustal sources during orogenesis...
Article
Full-text available
Zircon of crustal origin found in mantle-derived rocks is of great interest because of the information it may provide about crust recycling and mantle dynamics. Consideration of this requires understanding of how mantle temperatures, notably higher than zircon crystallization temperatures, affected the recycled zircon grains, particularly their iso...
Article
Full-text available
The Archean Bulautad gneisses in the East of the Ouled Dlim domain adjacent to the Reguibat Rise (West African Craton, Southern Morocco) are intruded by peralkaline A-type granites. These granites form two kilometer-sized bodies, North Derraman and Derraman Highs, and a few small satellites. Prior studies have shown that the chemical and mineralogi...
Article
The Oulad Dlim Massif represents the northern segment of the Mauritanide belt that thrusts over the western margin of the Reguibat Shield, north of the West African Craton (WAC). This belt includes various metamorphic units of Archean, Neoproterozoic and Palaeozoic ages that were stacked and thrust eastward during the Variscan orogeny. The core of...
Article
We present the results of physical properties, petrography, bulk chemistry, mineral compositions, phase relations modelling and Noble gases study of the meteorite El Pozo. The petrography and mineral compositions indicate that the meteorite is an L5 chondrite with a low shock stage of S2-S3. Heterogenous weathering was preferentially along shock st...
Article
All other factors being equal, the calculation of zircon Hf two stage model ages (TDM Hf) depends on the particular Lu/Hf value assumed for the magmatic source, the effect being more pronounced as the age difference between zircon and magmatic source increases. It is generally considered that the Lu/Hf measured in the zircon-hosting rock does not r...
Article
The Variscan orogen of NW Iberia contains abundant syn- and post-tectonic granitoids. The post-tectonic granitoids are metaluminous to slightly peraluminous, I-type granites, monzogranites ± granodiorites ± tonalites. The Porriño pluton studied here is a representative example. It consists of two units: i) a pink-red, peraluminous, biotite granite...
Conference Paper
Full-text available
Carbonatite rocks were described the first time in India (Bose, 1884) but their magmatic origin proposed much later and remained unaccepted until 1960 when the experimental work of Wyllie & Tuttle postulated the possibility of crystallization of calcite as a liquidus phase at a temperature as low as 650°C and Pressure of 0.1 GPa (Mitchell, 2005). B...
Article
The relationships of Y/Nb, Th/Nb, La/Nb and Ce/Pb ratios in A-type felsic rocks from the Ediacaran Katerina Ring Complex, northernmost Arabian-Nubian Shield (ANS; S. Sinai, Egypt), are investigated in this work to understand their behavior during generation of highly evolved granitic magmas and to explore the nature of magma sources.
Article
Full-text available
The Oulad Dlim Massif of the Western Reguibat Shield contains several carbonatite complexes of previously unknown age. The largest and best studied are Gleibat Lafhouda, composed of magnesiocarbonatites, and Twihinate, composed of calciocarbonatites. Gleibat Lafhouda is hosted by Archean gneisses and schists. It has a SHRIMP U-Th-Pb zircon crystall...
Article
Full-text available
The early and middle Miocene andesitic lavas of the Sierra de Angangueo (MALSA) represent one of the most prominent landforms of intermediate magmatism in Central Mexico. In this paper, we present new petrological, geochemical, thermobarometric, and geochronological data in order to discuss the conditions of MALSA’s emplacement in the lithosphere....
Article
Full-text available
West of the southern, Archean, part of the Reguibat Rise of the West African Craton the Oulad Dlim Massif consists of metamorphic nappes stacked during the Mauritanides (Variscan) orogeny. In the Derraman region, about 12km west of the nappes, we have found strongly deformed hypersolvus aegirine-riebeckite A1-type granites with SHRIMP zircon U-Pb a...
Article
Dependencies of plagioclase/amphibole Al-Si partitioning, DAl/Siplg/amp, and amphibole/liquid Mg partitioning, DMgamp/liq, on temperature, pressure and phase compositions are investigated employing robust regression methods based on MM-estimators. A database with 92 amphibole-plagioclase pairs - temperature range: 650-1050°C; amphibole compositiona...
Article
Full-text available
Kalsilite-bearing igneous rocks are extremely rare, most known examples are volcanic. The few previously recorded kalsilite-bearing plutonic rocks are all Phanerozoic and mostly limited to the small ultrapotassic massifs of the Baikal–Stanovoi Rift in the Siberian Craton, the Greenland Batbjerg Massif, and the Kola Peninsula Khibiny Complex. We hav...
Article
Mantle- and crustal-derived orogenic magmas provide insights into sources tapped during terrane accretion and supercontinent amalgamation. During Pangea formation volumetrically minor, but common, mafic–intermediate ‘calc-alkaline’ stocks intruded coeval granitoid plutons throughout the European Variscan. The Iberian Peninsula preserves the western...
Article
The Ediacaran post-collisional magmatic cycle of the Katerina Ring Complex, northern region of the Arabian–Nubian Shield (ANS; southern Sinai, Egypt), is characterized by a large diversity of A-type felsic igneous rocks: quartz syenite porphyries, microsyenites, quartz monzonites, aluminous syenogranites, alkali feldspar granites and aplites, and p...
Conference Paper
Full-text available
Orogenic magmatic rocks provide information about mantle and crust melt-generation and -interaction processes. In this context, minor potassic mafic stocks which are formed of enriched mantle and crustal components and are common as late-orogenic intrusions in granitic plutons give insight into the timing of new crust formation and crustal recyclin...
Article
The Variscan appinites from the San Martin del Pimpollar intrusion (Avila Batholith, Central Iberia) display geochemical and mineralogical evidence for hybridization with crustal-derived, partially molten, granodiorites and for rapid crystallization of residual melts.Quenching, apparently induced by the thermal contrast between mixing magmas, cause...
Article
SHRIMP U–Pb dating reveals that the hypabyssal Katerina Ring Complex formed over a ~9Ma interval. The first rocks that formed were the alkaline to peralkaline granitoids that form the wall and the roof cap of the Ring Dike, emplaced at 602±8Ma and 602±4Ma respectively. These were closely followed by the Isbaiya calc-alkaline quartz-monzonites at 59...
Conference Paper
Element partitioning between carbonates and coexisting high pressure phases plays a critical role in unravelling petrogenetic processes of eclogitic rocks, peridotites, diamond-bearing rock suites, and carbonatitic magmas. Experiments were carried out on MORB and lherzolitic bulk compositions, from gel starting materials, using piston-cylinder and...
Article
Bir Safsaf is one of the four Precambrian inliers of the southern Egyptian Western Desert; it is located midway between the juvenile crust of the Arabian-Nubian Shield and the Archean terranes of Gebel Kamil, near the Libyan border. Contrary to previous belief, Bir Safsaf is exclusively composed of late Pan-African granitoids, with U/Pb SHRIMP ages...
Article
Full-text available
Variscan Central Iberian Zone lamprophyre dikes cut synorogenic to late orogenic peraluminous S-type granitoids marking an important shift in regional tectonic regime from earlier, 350-290 Ma, extension-related crustal melting to later, 265 Ma, transtension-related mantle melting. The mean trend of the camptonite and bostonite dikes strikes ˜36° co...
Conference Paper
Full-text available
crustal origin transferred towards the hybrid tonalitic magma was much lower than in the host granodiorite. This is consistent with the very rare occurrence of biotite xenocrysts in low-Mg appinites. The geochemical and mineral relationships point to selective segregation of a felsic crustal component (residual liquid + quartz + two feldspars) duri...
Article
Terra Nova, 22, 341–346, 2010AbstractThe abnormally elevated abundance of inherited zircon (locally up to 80–90% of zircon grains contain pre-magmatic cores) in the Cambro-Ordovician magmatic rocks of Central Iberia made possible an estimation of the distribution of ages of their source rocks. The comparison of inherited U–Pb ages and whole-rock Nd...
Article
ERRATUM: Shoshonites, vaugnerites and potassic lamprophyres: similarities and differences between ‘ultra’-high-K rocks - Volume 100 Issue 3 - J. H. Scarrow, F. Bea, P. Montero, J. F. Molina
Article
We thank Mark B. Allen for giving us the opportunity to strengthen our case for the 41 Ma Piranshahr Massif postdating the collision of the Arabian and Iranian plates in the Sanandaj–Sirjan Zone in the Zagros orogen (Mazhari et al . 2009). Because of his suggestion that the Piranshahr Massif is not a reliable tectonic marker and that, based on regi...
Article
Central Iberian Variscan S-type granitoid plutons are cut by small-scale coeval appinitic stocks. Despite their whole-rock calc-alkaline character a subduction-related origin is not indicated for the appinites: field, petrographic, mineral chemistry, geochronological data and geodynamic information all point towards an extension-related genesis and...
Article
Full-text available
Central Iberian Variscan granite batholiths and anatectic complexes are punctuated by coeval stocks of hydrous, high-K calc-alkaline, ultrabasic to intermediate rock series. Despite their overall calc-alkaline affinity, the mafic–ultramafic members contain high-Ti amphibole oikocrysts rimmed by lower-Ti amphibole±cummingtonite and high-Ti amphibole...
Article
Full-text available
The bimodal Piranshahr massif is composed of coeval but geochemically unrelated mafic (40.7 ± 0.2 Ma zircon U-Pb sensitive high-resolution ion microprobe (SHRIMP) age) and A-type felsic rocks (41 ± 0.5 Ma Rb-Sr and 41.3 plusmn; 0.8 Ma zircon U-Pb SHRIMP age). The mafic rocks consist of two geochemical types of gabbros that derived from different ma...
Article
A comparative study of three main igneous rock associations that plot in the K2O–SiO2 diagram shoshonite field: shoshonite series absarokites–shoshonites–banakites (henceforth referred to as shoshonites s.l.), vaugnerites, and potassic lamprophyres, reveals that similarities between the associations are superficial. Vaugnerites and lamprophyres are...
Article
Full-text available
The Avila batholith of central Spain is composed, predominantly, of crustal-melt peraluminous granites cut by small-scale mafic alkaline bodies. Dating of the Gredos sector mafic camptonitic lamprophyre dykes was undertaken to constrain the Late Variscan tectonomagmatic evolution of the region. A well constrained late Permian, Capitanian, age of 26...
Article
In the Central Iberian Zone there are several large thermal domes in which small bodies of ultramatic, mafic and intermediate rocks appear intimately associated with crustal granites and migmatites. The closest spatial association between the ultramafic, mafic and intermediate rocks and migmatites is in the Toledo Anatectic Complex, where field rel...
Article
The Avila batholith of central Spain is composed, predominantly, of crustal-melt peraluminous granites cut by small-scale mafic alkaline bodies. Dating of the Gredos sector mafic camptonitic lamprophyre dykes was undertaken to constrain the Late Variscan tectonomagmatic evolution of the region. A well constrained late Per- mian, Capitanian, age of...
Article
The wide compositional spectrum of the Variscan batholiths of the Urals, a continuum from gabbros (or diorites) to leucogranites, was produced by crystal fractionation, but the physical mechanisms involved in formation of the bodies remains obscure. To test whether syn-magmatic deformation was essential to enhance the efficiency of the process, we...
Article
Full-text available
Metasomatic amphibole-eclogite sequences grew in selvages of quartz veins from the Marun-Keu complex (Polar Urals, Russia) during high-pressure metamorphism. Relicts of a pre-metasomatic eclogite-facies assemblage are present in the wallrock layers as irregular patches. Wallrock interstitial quartz trails lying at a high angle to reaction fronts pr...
Article
Full-text available
Single-zircon evaporation and ion-microprobe dating of migmatites and anatectic granites in the Pena Negra Complex of Central Iberia reveal that the Variscan anatexis occurred continuously from 352 to 297 Ma, with a maximum at 335-305 Ma. Anatexis began coeval with the main collision of continental masses. A limited melting event, probably related...
Article
Rb/Sr internal mineral isochrons in the eclogite facies Marun-Keu metamorphic complex, Polar Urals, Russia, date periods of fluid-rock interaction and record the metamorphic reaction history. The Marun-Keu complex consists of Late Proterozoic to Early Ordovician, mostly igneous rocks that experienced a subduction-related, non-pervasive eclogite fac...
Article
Graphite and/or carbonates are stable in eclogite mafic systems, according to both natural evidences and experimental and computed data (Yaxley and Green, 1994; Molina and Poli, 2000). In this work, the stability of C-bearing phases in metamorphosed oceanic crust is discussed as a function of fO2, expected to be the main factor controlling fluid sp...
Article
Trace-element data (obtained by LA-ICP-MS) from garnet, clinopyroxene, amphibole, zoisite/epidote, paragonite and phengite from foliated eclogites and coronitic metagabbros and high-pressure amphibolites from the Nevado-Filábride complex (SE Spain) are reported in this work. Rb, Cs and Ba are concentrated in white mica, whereas Y and HREE are in ga...
Article
The Maksyutov complex (Southern Urals, Russia) is a well-preserved example of subduction-related high-pressure metamorphism. One of its two litho-tectonic units consists of rocks that experienced eclogite-facies conditions. Published 40Ar/39Ar data on phengite, U/Pb data on rutile, and Sm/Nd mineral data define a cluster of ages around 370 to 380 M...
Article
The Marun–Keu complex (Polar Urals, Russia) is a poorly known member of a group of high P complexes outcropping along the length of the Uralide orogen. The central and southern parts of the complex are metamorphosed at high P, medium T conditions (Tmax∼600–650 °C and P∼14–17 kbar) and differ from its northern part and the rest of the Uralian high P...
Article
Carbonates and hydrates are common products of the alteration of the upper basaltic crust in modern oceans. However, phase relationships and devolatilization reactions in altered CO2-bearing metabasalts during the subduction process are still poorly known. A series of fO2-buffered piston cylinder experiments were performed on three basaltic model c...
Article
Carbonates and hydrates are common products of the alteration of the upper basaltic crust in modern oceans. However, phase relationships and devolatilization reactions in altered CO2-bearing metabasalts during the subduction process are still poorly known. A series of fO2-buffered piston cylinder experiments were performed on three basaltic model c...
Article
Full-text available
The Avila batholith of central Spain is composed of upper Carboniferous peraluminous granitoids that were preceded by volumetrically insignificant bodies of mafic-ultramafic hybrid magmas and postdated by several dike swarms of camptonitic lamprophyres. Rb-Sr dating indicates continuous magmatic activity from 350 Ma to 280 Ma, starting ∼ ∼ with the...
Article
Full-text available
Chemographic constraints from high-pressure mafic rocks of the Nevado-Filabride Complex (Betic-Rif mountain belts, SE Spain) and from worldwide high-pressure terrains have been used to unravel phase relationships between amphibole, garnet, clinopyroxene, and albite in the system Na2O-CaO-FeO-MgO-Al2O3-SiO2-H2O (NCFMASH) at quartz-, paragonite-, cli...
Article
Full-text available
The basic-ultrabasic rocks from the Mina Salamanca mining district and from Los Gateados consist of serpentinites. gabbros and amphibolites. They occur within a thick metapelitic sequence in the Cordillera Frontal of Mendoza (Argentina). These rocks are partially metamorphosed in epidote-bearing amphibolites facies conditions and lately in green-sc...