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Pilar Montero
University of Granada
GeologyMagmatismGeochemistryZirconPetrology
101Publications
34H-index
2,947Citations
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Publications 102
Newest
#1Fernando Bea (UGR: University of Granada)H-Index: 38
#2Nikolai Bortnikov (RAS: Russian Academy of Sciences)
Last. José Francisco Molina-Palma (UGR: University of Granada)
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Abstract 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° contained xenocrysts, here defined as those grains that coexist with a significantly younger population or are significantly older than the band of...
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#1N. S. Bortnikov (RAS: Russian Academy of Sciences)H-Index: 9
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U-Pb age, oxygen and hafnium isotopic ratios in zircon from rocks of ocean core complexes at Mid-Atlantic Ridge have been studied using SHRIMP and MC-LA-ICP-MS techniques. U-Pb dating revealed four group of zircons: 1) 0,6-1,7 Ma, 2) 6,7-11,2 Ma, 3) 12,9-17,6 Ma, 4) ≥200 to 2044 Ma. The δ18O values range from 4,74 to 7,2‰ and are distinct for zircon grains of different ages. Hafnium isotopic ratio for zircon aged from 0,6 to 17,6 Ma corresponds or is close to that of MORB from Central Atlantic. ...
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#1N. S. BortnikovH-Index: 9
#2S. A. SilantyevH-Index: 7
Last. Evgenii V. SharkovH-Index: 14
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The U–Pb age and oxygen and hafnium isotope ratios of zircon from rocks of oceanic core complexes along the Mid-Atlantic Ridge have been studied using SHRIMP and MC-LA-ICP-MS techniques. The U–Pb dating revealed four groups of zircon: (1) 0.6–1.7 Ma, (2) 6.7–11.2 Ma, (3) 12.9–17.6 Ma, and (4) ≥ 200 to 2044 Ma. The δ18O values range from 4.74 to 7.2‰ and are distinct for zircon grains of different ages. The hafnium isotope ratio for zircon with an age from 0.6 to 17.6 Ma corresponds or is close t...
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#2Pilar MonteroH-Index: 34
Last. André MichardH-Index: 29
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Abstract Numerous mafic dykes, sills and laccoliths crop out in the southern part of the Tafilalt basin (Eastern Anti-Atlas, Morocco). These rocks intrude the mildly folded Ordovician to Early Carboniferous formations, consisting mainly of lamprophyric dolerites and camptonites with minor gabbros and syenodiorites. Previous geochemical studies have shown that the Tafilalt magmatism of sodic-alkaline affinity has been produced by low degrees of partial melting from an enriched deep mantle source ...
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#1Abderrahmane Soulaimani (Cadi Ayyad University)H-Index: 19
#2H. Ouanaimi (Cadi Ayyad University)H-Index: 2
Last. K. Hefferan (Hong Kong Environmental Protection Department)
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Abstract South of the Pan-African suture zone of the Anti-Atlas, the Agadir Melloul inlier exhibits several crests of nearly vertical conglomeratic quartzite beds inserted in Paleoproterozoic granites. These enigmatic rocky walls have been considered as Early Neoproterozoic platform sediments pinched within the 2.03 Ga-old granites during brittle faulting events at ca. 570 Ma. The data presented here contradict this interpretation. The quartzite crests correspond to parts of tight synclines pinc...
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#1Aitor Cambeses (UGR: University of Granada)H-Index: 7
#2Pilar Montero (UGR: University of Granada)H-Index: 34
Last. Fernando Bea (RUB: Ruhr University Bochum)H-Index: 38
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Abstract 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. Variscan plutons in the Ossa-Morena Zone are unusual, and particularly useful, because they comprise numerous mafic-intermediate-felsic int...
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#1Fernando BeaH-Index: 38
#3Pilar MonteroH-Index: 34
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#1Faouziya HaissenH-Index: 6
#2Pilar Montero (UGR: University of Granada)H-Index: 34
view all 9 authors...
Abstract 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 mineralogical compositions of these granites are remarkably uniform, and the North Derraman and Derraman Highs are hypersolvus aegirine–riebeckite gran...
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#1Fernando Bea (UGR: University of Granada)H-Index: 38
#2Pilar Montero (UGR: University of Granada)H-Index: 34
Last. Jose Francisco Molina Palma (UGR: University of Granada)H-Index: 2
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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 isotopic clocks. Since Pb2+ diffuses faster than U4+ and Th+4, it is generally believed that recycled zircon grains lose all radiogenic Pb after a few mi...
4 CitationsSource
#1José Molina (UGR: University of Granada)H-Index: 23
#2Fernando Bea (UGR: University of Granada)H-Index: 38
Last. Abdellah MouttaqiH-Index: 5
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Abstract 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 the Oulad Dlim Massif comprises the Adrar–Souttouf Metamafic Complex that represents a large tectonic unit made of high-grade mafic rocks and...
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