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  • 1
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    Petrotectonics, climate, crustal thickness, and evolution of geologically young orogenic belts. The 4D Framework of Continental Crust. The 4D Framework of Continental Crust (2007)
    In:  Geological Society of America, Special Paper
    Details
    Publication Date: 2007
    Keywords: TF IV ; Task Force IV ; Ultra-Deep Continental Crust Subduction (UDCCS)
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    BIBLIOGRAPHY ILP
  • 2
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    Ultrahigh-Capacity Lithium-Oxygen Batteries Enabled by Dry-Pressed Holey Graphene Air Cathodes (2017)
    In:  CASI
    Details
    Publication Date: 2019-06-08
    Description: Lithium-oxygen (Li-O2) batteries have the highest theoretical energy density of all the Li-based energy storage systems, but many challenges prevent them from practical use. A major obstacle is the sluggish performance of the air cathode, where both oxygen reduction (discharge) and oxygen evolution (charge) reactions occur. Recently there have been significant advances in the development of graphene-based air cathode materials with a large surface area and high catalytic activity for both oxygen reduction and evolution reactions. However, most studies reported so far have examined air cathodes with a limited areal mass loading rarely exceeding 1 mg/cm2. Despite the high gravimetric capacity values achieved, therefore, the actual (areal) capacities of those batteries were far from sufficient for practical applications. Here, we present the fabrication, performance, and mechanistic investigations of high mass loading (up to 10 mg/cm2) graphene-based air electrodes for high-performance Li-O2 batteries. Such air electrodes could be easily prepared within minutes under solvent-free and binder-free conditions by compression molding holey graphene because of the unique dry compressibility of this graphene structural derivative with in-plane holes. High mass loading Li-O2 batteries prepared in this manner exhibited excellent gravimetric capacity and thus ultrahigh areal capacity (as high as ~40 mAh/cm2). The batteries were also cycled at a high curtailing areal capacity (2 mAh/cm2), with ultrathick cathodes showing a better stability during cycling than thinner ones. Detailed postmortem analyses of the electrodes clearly revealed the battery failure mechanisms under both primary and secondary modes, which were the oxygen diffusion blockage and the catalytic site deactivation, respectively. The results strongly suggest that the dry-pressed holey graphene electrodes are a highly viable architectural platform for high capacity, high performance air cathodes in Li-O2 batteries of practical significance.
    Keywords: Electronics and Electrical Engineering
    Type: NF1676L-26541 , Nano Letters (ISSN 1530-6984) (e-ISSN 1530-6992); 17; 5; 3252-3260
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    A communal catalogue reveals Earth’s multiscale microbial diversity (2017)
    Nature Research
    In:  Nature, 551 (7681). pp. 457-463.
    Details
    Publication Date: 2020-02-06
    Description: Our growing awareness of the microbial world’s importance and diversity contrasts starkly with our limited understanding of its fundamental structure. Despite recent advances in DNA sequencing, a lack of standardized protocols and common analytical frameworks impedes comparisons among studies, hindering the development of global inferences about microbial life on Earth. Here we present a meta-analysis of microbial community samples collected by hundreds of researchers for the Earth Microbiome Project. Coordinated protocols and new analytical methods, particularly the use of exact sequences instead of clustered operational taxonomic units, enable bacterial and archaeal ribosomal RNA gene sequences to be followed across multiple studies and allow us to explore patterns of diversity at an unprecedented scale. The result is both a reference database giving global context to DNA sequence data and a framework for incorporating data from future studies, fostering increasingly complete characterization of Earth’s microbial diversity.
    Type: Article , PeerReviewed
    Format: text
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  • 4
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    Análisis estructural y evolución tectonometamórfica del basamento de las cuencas neógenas de Vera y Huercal-Overa, Béticas orientales (2003)
    Sociedad Geológica de España
    In:  Revista de la Sociedad Geologica de Espana, 16 (3-4). pp. 193-211.
    Details
    Publication Date: 2016-09-14
    Description: The basement of the Vera and Huercal Overa basins (southeastem Betics) is fonned by rocks ofthe Alboran Crustal Domain; a terrain which collided with the South-Iberian and Maghrebian continentalmargins in the Lower Miocene, resulting in the fonnation of the Gibraltar Are mountain chain. The Alpuja1Tide complex which occupies an intermediate structural position within the Alboran Domain, above the Nevado-Filabride and below the Malaguide complexes, includes at least three tectonic units in the southeastern Betics. From bottom to top in the slTuctural sequence, these units are Almagro, Almanzora and Variegato. The metapelitic rocks of these units show significative differences in their tectonic fabrics and in their P-T metamorphic paths. The lower Almagro unit underwent low-P/low-T metamorphism (300 oc and 3-4 kbar) and its metapelites are slates with no differentiated metamorphic fabric, which show two sets of spaced axial-plane cleavages. The intennediate Almanzora unit has two differentiated metamorphic fabrics. The oldest foliation (S,) preserved in quartz-rich domains of a crenulation cleavage (S ce) grew during high-P/low-T metamorphism (between 300 °C/12 kbar and 350 oC/6 kbar). The Scc cleavage deyeloped after an isobaric heating to 475 oc at 5 kbar and registers an initial isothennal decompression to 475 oc at 3 kbar followed by cooling to 300 oc at 2 kbar. A brittle spaced cleavage axial plane to N-vergent asymmetric folM cuts the S ce fabtic. At the top ofthe Alpujarride tectonic pile the Variegato unit, includes up to tlu·ee imbrications formed from top to bottom by gamet schists, fine"grained schists and Triassic carbonates. The main Scc foliation in the gamet schists grew during a nearly isothennal decompression between 500 oc at 8 kbar and 525 oc at 2 kbar. In the Variegato dark schists, the spaced crenulation cleavage associated to Nvergent folds is defined by muscovite and chlorite lepidoblasts and is overprinted by the growth of andalousite porphyroblasts. This assemblage equilibrated at 450-460 oc at 2 kbar. The Variegato fine-grained schists include a high-P/low-T Mg-carpholite-bearing assemblage, within pre-Scc quartz veins equilibrated at 8-10 kbar and approximately 400 °C. Furthermore, a chlorite + phengite + quartz assemblage defining the se relic foliation in lenticular domains of the scc cleavage shows local equilibria at 11 to 9 kbar at 400 °C. The superposition ofthese units was related with N-directed compressional brittle-ductile shear zones and associated N-vergent asymmetric folds, which were active at a late stage of the metamorphic evolution after coaxial ductile flattening of the Variegato and Almanzora units. The thrust pile that resulted from this late compressional event was later thinned by two consecutive brittle extensional systems with northward and southwestward tectonic transport. Final! y, these metamorphic rocks were exhumed to the surface in the core of E-W oriented anticlinal ridges, which developed during the Upper Neogene and the Quaternary. Folding and strike-slip faulting of the Miocene Alboran basin produced the present basin and range morphology of the southeastern Betics, which is characterised by the formation of isolated sedimentary basins in the synclines.
    Type: Article , NonPeerReviewed
    Format: text
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  • 5
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    Metamorfismo de AP/BT en metapelitas de la unidad de Ragua (complejo Nevado-Filábride, Béticas). Resultados termobarométricos del estudio de equilibrios locales (2003)
    Sociedad Geológica de España
    In:  Geogaceta, 34 . pp. 87-90.
    Details
    Publication Date: 2017-05-16
    Description: We have analysed the thermobarometric equilibrium conditions reached during local equilibria among phengite + chlorite + quartz + water ± chloritoid ± garnet assemblages found in metapelites of the Ragua unit, the structurally-lowest tectonic unit outcropping in the Betics hinterland (southern Spain). Porphyroblast- deformation relationships show that lenticular domains preserved within the main foliation in the metapelites grew during a HP/LT prograde metamorphic event with thermal conditions of 320-450 °C and 12-14 kbar pressure. Hence, the Ragua unit subducted in a continental accretionary-wedge context, undergoing a tectonic evolution parallel to the one followed by the two other overlying Nevado-Filabride units.
    Type: Article , NonPeerReviewed
    Format: text
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  • 6
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    Acoustic and seismic imaging of the Adra Fault (NE Alboran Sea): in search of the source of the 1910 Adra earthquake (2012)
    Copernicus Publications
    In:  Natural Hazards and Earth System Sciences, 12 (11). pp. 3255-3267.
    Details
    Publication Date: 2017-01-18
    Description: Recently acquired swath-bathymetry data and high-resolution seismic reflection profiles offshore Adra (Almería, Spain) reveal the surficial expression of a NW–SE trending 20 km-long fault, which we termed the Adra Fault. Seismic imaging across the structure depicts a sub-vertical fault reaching the seafloor surface and slightly dipping to the NE showing an along-axis structural variability. Our new data suggest normal displacement of the uppermost units with probably a lateral component. Radiocarbon dating of a gravity core located in the area indicates that seafloor sediments are of Holocene age, suggesting present-day tectonic activity. The NE Alboran Sea area is characterized by significant low-magnitude earthquakes and by historical records of moderate magnitude, such as the Mw = 6.1 1910 Adra Earthquake. The location, dimension and kinematics of the Adra Fault agree with the fault solution and magnitude of the 1910 Adra Earthquake, whose moment tensor analysis indicates normal-dextral motion. The fault seismic parameters indicate that the Adra Fault is a potential source of large magnitude (Mw ≤ 6.5) earthquakes, which represents an unreported seismic hazard for the neighbouring coastal areas.
    Type: Article , PeerReviewed
    Format: text
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  • 7
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    Crustal types and Tertiary tectonic evolution of the Alborán sea, western Mediterranean (2007)
    AGU (American Geophysical Union)
    In:  Geochemistry, Geophysics, Geosystems, 8 (Q1000005).
    Details
    Publication Date: 2018-03-01
    Description: Multichannel seismic reflection images across the transition between the east Alborán and the Algero-Balearic basins show how crustal thickness decreases from about 5 s two-way traveltime (TWTT, ∼15 km thick) in the west (east Alborán basin) to ∼2 s TWTT typical of oceanic crust (∼6 km thick) in the east (Algero-Balearic basin). We have differentiated three different crustal domains in this transition, mainly on the basis of crustal thickness and seismic signature. Boundaries between the three crustal domains are transitional and lack evidence for major faults. Tilted blocks related to extension are very scarce and all sampled basement outcrops are volcanic, suggesting a strong relationship between magmatism and crustal structure. Stratigraphic correlation of lithoseismic units with sedimentary units of southeastern Betic basins indicates that sediments onlap igneous basement approximately at 12 Ma in the eastern area and at 8 Ma in the western area. Linking seismic crustal structure with magmatic geochemical evidence suggests that the three differentiated crustal domains may represent, from west to east, thin continental crust modified by arc magmatism, magmatic-arc crust, and oceanic crust. Middle to late Miocene arc and oceanic crust formation in the east Alborán and Algero-Balearic basins, respectively, occurred during westward migration of the Gibraltar accretionary wedge and shortening in the Betic-Rif foreland basins. Arc magmatism and associated backarc oceanic crust formation were related to early to middle Miocene subduction and rollback of the Flysch Trough oceanic basement. Subduction of this narrow slab beneath the Alborán basin was coeval with collision of the Alborán domain with the Iberian and African passive margins and subsequent subcontinental-lithosphere edge delamination along the Betic-Rif margins.
    Type: Article , PeerReviewed
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  • 8
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    Diversity enhances carbon storage in tropical forests (2015)
    In:  Global Ecology and Biogeography
    Details
    Publication Date: 2022-03-21
    Type: info:eu-repo/semantics/article
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    CITATION PIK
  • 9
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    Rapid bacterioplankton transcription cascades regulate organic matter utilization during phytoplankton bloom progression in a coastal upwelling system (2022)
    Nature Research
    Details
    Publication Date: 2024-02-07
    Description: Coastal upwelling zones are hotspots of oceanic productivity, driven by phytoplankton photosynthesis. Bacteria, in turn, grow on and are the principal remineralizers of dissolved organic matter (DOM) produced in aquatic ecosystems. However, the molecular processes that key bacterial taxa employ to regulate the turnover of phytoplankton-derived DOM are not well understood. We therefore carried out comparative time-series metatranscriptome analyses of bacterioplankton in the Northwest Iberian upwelling system, using parallel sampling of seawater and mesocosms with in situ-like conditions. The mesocosm experiment uncovered a taxon-specific progression of transcriptional responses from bloom development (characterized by a diverse set of taxa in the orders Cellvibrionales, Rhodobacterales, and Pelagibacterales), over early decay (mainly taxa in the Alteromonadales and Flavobacteriales), to senescence phases (Flavobacteriales and Saprospirales taxa). Pronounced order-specific differences in the transcription of glycoside hydrolases, peptidases, and transporters were found, supporting that functional resource partitioning is dynamically structured by temporal changes in available DOM. In addition, comparative analysis of mesocosm and field samples revealed a high degree of metabolic plasticity in the degradation and uptake of carbohydrates and nitrogen-rich compounds, suggesting these gene systems critically contribute to modulating the stoichiometry of the labile DOM pool. Our findings suggest that cascades of transcriptional responses in gene systems for the utilization of organic matter and nutrients largely shape the fate of organic matter on the time scales typical of upwelling-driven phytoplankton blooms.
    Type: Article , PeerReviewed
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  • 10
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    Direct Evidence of a Slow‐Slip Transient Modulating the Spatiotemporal and Frequency‐Magnitude Earthquake Distribution: Insights From the Armutlu Peninsula, Northwestern Turkey (2022)
    Bocchini, G. M. ; Martínez‐Garzón, P. ; Verdecchia, A. ; [et al.]
    Details
    Publication Date: 2022-12-05
    Description: Earthquakes and slow‐slip events interact, however, detailed studies investigating their interplay are still limited. We generate the highest resolution microseismicity catalog to date for the northern Armutlu Peninsula in a ∼1‐year period to perform a detailed seismicity distribution analysis and correlate the results with a local, geodetically observed slow‐slip transient within the same period. Seismicity shows a transition of cluster‐type behavior from swarm‐like to burst‐like, accompanied by an increasing relative proportion of clustered (non‐Poissonian) relative to background (Poissonian) seismicity and gradually decreasing b‐value as the geodetically observed slow‐slip transient ends. The observed slow‐slip transient decay correlates with gradually increasing effective‐stress‐drop values. The observed correlation between the b‐value and geodetic transient highlights the influence of aseismic deformation on seismic deformation and the impact of slow‐slip transients on local seismic hazard.
    Description: Plain Language Summary: Seismic and aseismic slip on faults can change the stress state in the crust and affect the recurrence time of earthquakes. Observations of how earthquakes and aseismic fault slip influence each other are limited because of the dearth of synchronous high‐resolution seismological and geodetic data. Here we use high‐resolution earthquake data in the northern Armutlu Peninsula along the Marmara seismic gap of the North Anatolian Fault (Turkey) to correlate the earthquake distribution with a local slow‐slip transient that occurred in the same period. We find that the slow‐slip transient modulates the spatiotemporal and frequency‐magnitude evolution of earthquakes, which highlights the influence of slow fault creep on fast fault slip. Our study demonstrates the importance of considering slow‐slip transients for seismic hazard assessment.
    Description: Key Points: Seismicity analysis suggests that both external and internal forcing drive deformation in the Armutlu Peninsula. Temporal correlation between a slow‐slip transient and seismic b‐value highlights interactions between aseismic and seismic deformation. Slow‐slip transients modulate the frequency‐magnitude and spatiotemporal earthquake distribution.
    Description: VW momentum grant
    Description: Helmotz Association Young Investigator Group http://dx.doi.org/10.13039/501100009318
    Description: Helmholtz‐Zentrum Potsdam—Deutsches GeoForschungs Zentrum GFZ, GIPP http://dx.doi.org/10.13039/501100010956
    Keywords: ddc:551.22 ; microseismicity ; enhanced catalog ; near‐fault monitoring ; seismic‐aseismic deformation ; slow‐slip transient
    Language: English
    Type: doc-type:article
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    CITATION GEO-LEO
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