Éditeur(s) : Impr. de L. Tasso y Serra Impr. de L. Tasso y Serra ( Barcelona )
Résumé : (Citation/Reference) Batista Villarreal, T. Publicaciones periódicas cubanas (1965), p. 36.
(Dates or Sequential Designation) Año 1, núm. 1 (enero de 1885)-
(Dates or Sequential Designation) -año 4, núm. 6 (29 de feb. de 1888)?
(Numbering Peculiarities) Año 2 complete in two numbers.
Description based on: año 1, núm. 2 (enero de 1885); title from masthead.
Editor: Domingo Figarola-Caneda.
Distributed in Havana.
Indexes issued annually.
Rare Book Copy bound privately in red cloth, stamped with red, black and gold with publisher's index and supplement titled: Ultima moda; bears bookplate of former owner, Alberto Parreño; also inscribed by Federico Cajial to D. Antonio, Elosqui.
Cuba -- Havana
Spain -- Barcelona
Cuba
Cuba
Spain
Barcelona
Cuba
Havana

002934220
52479416
APG5848

Éditeur(s) : United States Army Topographic Command ( Washington, D. C. )
Résumé : "Map information as of 1968."
Relief shown by contours and spot heights.
Alternate title: San Francisco de Macorís.
"Grid 1,000 meter, UTM: Zone 19 (black numbered lines), 1,000 meter, Lambert for Dominican Republic (blue numbered ticks)."
Standard map series designation: Series E931 -- Serie E931.
Includes indexes, indexed boundary diagram, and glossary.
(Statement of Responsibility) prepared under the direction of the Department of Defense and published by the U.S. Army Topographic Command.
Dominican Republic -- San Francisco de Macoris
San Francisco de Macorís (Dominican Republic)

Droits : This item is a work of the U.S. federal government and not protected by copyright pursuant to 17 U.S.C. §105.
31209763
001949863
http://ufdc.ufl.edu/UF00098756/00001

Éditeur(s) : Impr. de L. Tasso y Serra Impr. de L. Tasso y Serra ( Barcelona )
Résumé : (Citation/Reference) Batista Villarreal, T. Publicaciones periódicas cubanas (1965), p. 36.
(Dates or Sequential Designation) Año 1, núm. 1 (enero de 1885)-
(Dates or Sequential Designation) -año 4, núm. 6 (29 de feb. de 1888)?
(Numbering Peculiarities) Año 2 complete in two numbers.
Description based on: año 1, núm. 2 (enero de 1885); title from masthead.
Editor: Domingo Figarola-Caneda.
Distributed in Havana.
Indexes issued annually.
Rare Book Copy bound privately in red cloth, stamped with red, black and gold with publisher's index and supplement titled: Ultima moda; bears bookplate of former owner, Alberto Parreño; also inscribed by Federico Cajial to D. Antonio, Elosqui.
Cuba -- Havana
Spain -- Barcelona
Cuba
Cuba
Spain
Barcelona
Cuba
Havana

002934220
52479416
APG5848

Éditeur(s) : Impr. de L. Tasso y Serra Impr. de L. Tasso y Serra ( Barcelona )
Résumé : (Citation/Reference) Batista Villarreal, T. Publicaciones periódicas cubanas (1965), p. 36.
(Dates or Sequential Designation) Año 1, núm. 1 (enero de 1885)-
(Dates or Sequential Designation) -año 4, núm. 6 (29 de feb. de 1888)?
(Numbering Peculiarities) Año 2 complete in two numbers.
Description based on: año 1, núm. 2 (enero de 1885); title from masthead.
Editor: Domingo Figarola-Caneda.
Distributed in Havana.
Indexes issued annually.
Rare Book Copy bound privately in red cloth, stamped with red, black and gold with publisher's index and supplement titled: Ultima moda; bears bookplate of former owner, Alberto Parreño; also inscribed by Federico Cajial to D. Antonio, Elosqui.
Cuba -- Havana
Spain -- Barcelona
Cuba
Cuba
Spain
Barcelona
Cuba
Havana

002934220
52479416
APG5848

Éditeur(s) : s.n. ( London )
Résumé : Inset maps: "A draught of the harbour of Port Antonio & St. Francis on the north east coast of Jamaica" ; "A draught of Port Royal or Kingston Harbour in Jamaica."
Numbered "N⁰64."
Shows boundaries, roads, forests, plantations and settlements.
Relief shown pictorially, water depth by soundings.
London meridian.
Island of Jamaica.
(Funding) Funded in part by the University of Florida, the Florida Heritage Project of the State University Libraries of Florida, the Institute for Museum and Library Services, and the U.S. Department of Education's TICFIA granting program.
(Statement of Responsibility) by Eman. Bowen.
England -- London
Jamaica
Jamaica

Droits : This item is presumed to be in the public domain. The University of Florida George A. Smathers Libraries respect the intellectual property rights of others and do not claim any copyright interest in this item. Users of this work have responsibility for determining copyright status prior to reusing, publishing or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions may require permission of the copyright holder. The Smathers Libraries would like to learn more about this item and invite individuals or organizations to contact Digital Services (UFDC@uflib.ufl.edu) with any additional information they can provide.
43216717
http://ufdc.ufl.edu/UF00081600/00001

Éditeur(s) : Impr. de L. Tasso y Serra Impr. de L. Tasso y Serra ( Barcelona )
Résumé : (Citation/Reference) Batista Villarreal, T. Publicaciones periódicas cubanas (1965), p. 36.
(Dates or Sequential Designation) Año 1, núm. 1 (enero de 1885)-
(Dates or Sequential Designation) -año 4, núm. 6 (29 de feb. de 1888)?
(Numbering Peculiarities) Año 2 complete in two numbers.
Description based on: año 1, núm. 2 (enero de 1885); title from masthead.
Editor: Domingo Figarola-Caneda.
Distributed in Havana.
Indexes issued annually.
Rare Book Copy bound privately in red cloth, stamped with red, black and gold with publisher's index and supplement titled: Ultima moda; bears bookplate of former owner, Alberto Parreño; also inscribed by Federico Cajial to D. Antonio, Elosqui.
Cuba -- Havana
Spain -- Barcelona
Cuba
Cuba
Spain
Barcelona
Cuba
Havana

002934220
52479416
APG5848

Éditeur(s) : E. Dentu E. Dentu ( Paris )
Résumé : Bound with this are the author's La Republique d'Haïti à l'apothéose de Victor Hugo Paris, 1885 and Le panthéon haïtien Paris, 188-?.

27258610
ocm27258610

Éditeur(s) : Wiley-blackwell
Résumé : The reef fauna connectivity of the West Indian Ocean (WIO) is one of the least studied globally. Here we use genetic analyses of the grouper Epinephelus merra (Bloch 1793) to determine patterns of connectivity and to identify barriers to dispersal in this WIO marine area. Phylogeographic and population-level analyses were conducted on cytochrome b sequences and microsatellites (13 loci) from 557 individuals sampled in 15 localities distributed across the West Indian Ocean. Additional samples from the Pacific Ocean were used to benchmark the WIO population structure. The high level of divergence revealed between Indian and Pacific localities (of about 4.5% in sequences) might be the signature of the major tectonic and climatic changes operating at the Plio-Pleistocene transition, congruently with numerous examples of Indo-Pacific speciation. In comparison, the E. merra sequences from the Indian Ocean constitute a monophyletic clade with a low average genetic distance (d < 0.5%). However both genetic markers indicated some structure within this ocean. The main structure revealed was the isolation of the Maldives from the WIO localities (a different group signature identified by clustering analysis, great values of differentiation). Both marker types reveal further significant structure within the WIO, mainly the isolation of the Mascarene Islands (significant AMOVA and isolation-by-distance patterns) and some patchy structure between the northernmost localities and within the Mozambique Channel. The WIO genetic structure of E. merra appeared congruent with main biogeographic boundaries and oceanographic currents.
Marine Ecology-an Evolutionary Perspective (0173-9565) (Wiley-blackwell), 2015-09 , Vol. 36 , N. 3 , P. 447-461

Droits : 2014 Blackwell Verlag GmbH
http://archimer.ifremer.fr/doc/00189/30046/28566.pdf
DOI:10.1111/maec.12153
http://archimer.ifremer.fr/doc/00189/30046/

Éditeur(s) : Impr. de L. Tasso y Serra Impr. de L. Tasso y Serra ( Barcelona )
Résumé : (Citation/Reference) Batista Villarreal, T. Publicaciones periódicas cubanas (1965), p. 36.
(Dates or Sequential Designation) Año 1, núm. 1 (enero de 1885)-
(Dates or Sequential Designation) -año 4, núm. 6 (29 de feb. de 1888)?
(Numbering Peculiarities) Año 2 complete in two numbers.
Description based on: año 1, núm. 2 (enero de 1885); title from masthead.
Editor: Domingo Figarola-Caneda.
Distributed in Havana.
Indexes issued annually.
Rare Book Copy bound privately in red cloth, stamped with red, black and gold with publisher's index and supplement titled: Ultima moda; bears bookplate of former owner, Alberto Parreño; also inscribed by Federico Cajial to D. Antonio, Elosqui.
Cuba -- Havana
Spain -- Barcelona
Cuba
Cuba
Spain
Barcelona
Cuba
Havana

002934220
52479416
APG5848

Éditeur(s) : Impr. de L. Tasso y Serra Impr. de L. Tasso y Serra ( Barcelona )
Résumé : (Citation/Reference) Batista Villarreal, T. Publicaciones periódicas cubanas (1965), p. 36.
(Dates or Sequential Designation) Año 1, núm. 1 (enero de 1885)-
(Dates or Sequential Designation) -año 4, núm. 6 (29 de feb. de 1888)?
(Numbering Peculiarities) Año 2 complete in two numbers.
Description based on: año 1, núm. 2 (enero de 1885); title from masthead.
Editor: Domingo Figarola-Caneda.
Distributed in Havana.
Indexes issued annually.
Rare Book Copy bound privately in red cloth, stamped with red, black and gold with publisher's index and supplement titled: Ultima moda; bears bookplate of former owner, Alberto Parreño; also inscribed by Federico Cajial to D. Antonio, Elosqui.
Cuba -- Havana
Spain -- Barcelona
Cuba
Cuba
Spain
Barcelona
Cuba
Havana

002934220
52479416
APG5848

Éditeur(s) : United States Army Topographic Command United States Army Topographic Command ( Washington, D. C. )
Résumé : "Map information as of 1968."
Relief shown by contours and spot heights.
Alternate title: Mao.
Standard map series designation: Series E931 = Serie E931.
"Grid 1,000 meter, UTM: Zone 19 (black numbered lines), 1,000 meter, Lambert for Dominican Republic (blue numbered ticks)."
Includes indexes, indexed boundary diagram, and glossary.
(Statement of Responsibility) prepared under the direction of the Department of Defense and published by the U.S. Army Topographic Command.
Dominican Republic -- Mao
Mao (Dominican Republic)

12611884
85690395
001933086

Éditeur(s) : United States Defense Mapping Agency, Hydrographic / Topographic Center ( Washington, D. C. )
Résumé : Relief shown by contours and spot heights.
Standard map series designation: Series E952.
Alternate title: La Lima.
Indexed for selected buildings.
"Printed by ... DMAHTC 8-91."
Includes street index, location map, boundaries map, and notes.
(Statement of Responsibility) prepared and published by the Defense Mapping Agency Hydrographic/Topographic Center, Washington, D.C.
Honduras -- La Lima
La Lima (Honduras)

Droits : This item is a work of the U.S. federal government and not protected by copyright pursuant to 17 U.S.C. §105.
26998455
001819330
http://ufdc.ufl.edu/UF00098773/00001

Éditeur(s) : HAL CCSD Elsevier
Résumé : Nominally anhydrous minerals (NAMs) of Earth's mantle can contain hydrogen as atomic impurity in their crystal structures. This hydrogen substantially modifies many physical properties of Earth's mantle rocks. Also, the Earth's deep interior is made of rocks where minerals are separated by nanometer-scale interfaces call grain boundaries and interphase boundaries. These grain boundaries should carefully be considered as a potential hydrogen reservoir as well. I report here an experimental investigation of hydrogen diffusion through grain boundaries in olivine polycrystalline aggregates. Hot-press and diffusion experiments were performed using a gas-medium high-pressure vessel at a confining pressure of 300 MPa, over a temperature range of 1000-1200 degrees C. The diffusion assembly consisted of a dense polycrystalline cylinder of natural olivine from San Carlos (Arizona) mixed with olivine singles crystals of millimeter size. This mixture was couple with a talc cylinder. Ni capsule were used to buffer the oxygen fugacity at Ni-NiO level. Experiment durations varied from 3 min to 4 h. The presence of hydrogen in the sample was quantified using Fourier transform infrared spectroscopy. The calculation of the diffusion coefficients was based on the estimation of the length of polycrystalline solid affected by the diffusion of hydrogen. The absence or presence of hydrogen was recorded by the large olivines behaving here as "hydrogen sensor", which are implanted in the aggregate. The results indicate that effective hydrogen diffusivity which includes grain boundaries effect in olivine aggregate is barely one order of magnitude faster than hydrogen diffusion in an olivine single crystal with a diffusivity similar to 8.5x 10(-10) m(2) s(-1) 1000 degrees C and only twice faster similar to 2.1 x10(-9) m(2) s(-1) 1200 degrees C. Calculations of the diffusion data in relation to the Arrhenius Law, yield an activation energy of similar to 70 +/- 10 kJ mol(-l) . From these effective diffusivities and combined with published diffusion data for olivine single crystals, hydrogen diffusion in grain boundaries is extracted and yield diffusivities almost three order of magnitude faster (similar to 5 x 10(-6) m(2) s(-1) at 1200 degrees C) than in an olivine single crystal at the equivalent high temperature. On geological scales and for coarse-grain rocks, hydrogen diffusivity in grain boundaries is not fast enough to compete with lattice diffusion. The relative large grain size of mantle rocks will ensure a very limited hydrogen transport by effective diffusion, and a good conservation of water-rich zones in the Earth's mantle.
ISSN: 0012-821X

hal-00512821
https://hal.archives-ouvertes.fr/hal-00512821
DOI : 10.1016/j.epsl.2010.04.019

Éditeur(s) : HAL CCSD Oxford University Press (OUP)
Résumé : International audience
The mantle above a subducting slab is the site of complex interactions between deformation, partial melting, fluid migration and magma transport. To constrain these interactions and their effects on olivine deformation, we analyze microstructures, crystal preferred orientations, and water contents of peridotite xenoliths entrained by andesites of the Avacha volcano, southern Kamchatka arc. These xenoliths are refractory spinel harzburgites that have coarse-grained microstructures with widely spaced subgrain boundaries and sinuous grain boundaries in olivine, consistent with deformation by dislocation creep under low deviatoric stress (< 13 MPa) and with a significant contribution from diffusional processes. Analysis of crystal preferred orientations (CPO) indicates dominant activation of high-temperature, low-stress {0kl}[100] slip systems in olivine and of(100)[001] in orthopyroxene. In most samples, coarse opx crystals, elongated parallel to the lineation, enclose small olivine grains in crystallographic continuity with neighbouring crystals, indicating crystallization of orthopyroxene at the expense of olivine as a result of reactive percolation of Si-rich fluids coeval with the high-temperature deformation. Secondary crystallization of interstitial orthopyroxene led locally to development of opx-rich lenses parallel to the foliation, characterized by a decrease in olivine grain size and dispersion of the olivine CPO without changing the dominant slip systems. Half of the samples also show acicular orthopyroxene aggregates with which is associated a fine-grained matrix composed of rounded strain-free olivine, orthopyroxene, spinel, and rare amphibole crystals. This matrix occurs pervasively along grain boundaries or forms millimeter-scale irregular lenses and anastomosing veinlets that crosscut the coarse crystals and their ductile deformation structures. Both acicular orthopyroxene and the fine-grained matrix are interpreted as resulting from reactive transport of H2O-rich fluids under static conditions, probably in the lithospheric mantle. Infrared analyses show that olivine contains 1-8 center dot 6 ppm by weight of water. These low water contents are similar to those observed in spinel peridotites from other subduction zones and probably record both the low solubility of water in olivine at low pressure and dehydration during exhumation of the xenoliths. Water contents in orthopyroxene are highly variable (25-506 ppm H2O), probably recording spatially heterogeneous interaction with fluids or melts and compositional disequilibrium in the studied samples. Change in the dominant percolation mechanism from porous flow to fracturing suggests cooling, consistent with the low temperatures estimated from pyroxene thermometry (< 800-900 degrees C). The Avacha xenoliths therefore record pervasive deformation of a region of the mantle under asthenospheric conditions, followed by its accretion to the base of the lithosphere, probably as a result of cooling of the mantle wedge. Percolation of Si-rich fluids or hydrous melts is recorded at all stages; this probably enhanced diffusion and lowered deviatoric stresses during ductile deformation, but did not change the dominant slip direction in olivine from [100] to [001].
ISSN: 0022-3530

hal-00456053
https://hal.archives-ouvertes.fr/hal-00456053
DOI : 10.1093/petrology/egp085

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Most of the plate boundaries are activated obliquely with respect to the direction of far field stresses, as roughly only 8% of the plate boundaries total length shows a very low obliquity (ranging from 0 to 10°, sub-orthogonal to the plate displacement). The obliquity along plate boundaries is controlled by (i) lateral rheological variations within the lithosphere and (ii) consistency with the global plate circuit. Indeed, plate tectonics and magmatism drive rheological changes within the lithosphere and consequently influence strain localization. Geodynamical evolution controls large-scale mantle convection and plate formation, consumption, and re-organization, thus triggering plate kinematics variations, and the adjustment and re-orientation of far field stresses. These geological processes may thus result in plate boundaries that are not perpendicular but oblique to the direction of far field stresses. This paper reviews the global patterns of obliquity along plate boundaries. Using GPlate, we provide a statistical analysis of present-day obliquity along plate boundaries. Within this framework, by comparing natural examples and geological models, we discuss deformation patterns and kinematics recorded along oblique plate boundaries.
ISSN: 0040-1951

hal-01467188
https://hal.archives-ouvertes.fr/hal-01467188
DOI : 10.1016/j.tecto.2016.05.033

Éditeur(s) : HAL CCSD Ocean Drilling Programm
Résumé : This paper provides a summary of postcruise scientific results from Ocean Drilling Program (ODP) Leg 209 available to date, building upon shipboard observations and syntheses summarized in the Leg 209 Initial Results volume. During Leg 209, 19 holes were drilled at 8 sites along the Mid-Atlantic Ridge from 14°43´ to 15°44´N, mainly in residual mantle peridotite intruded by gabbroic rocks, in order to understand the tectonic and structural processes responsible for formation of oceanic lithosphere with abundant residual peridotite exposed on the seafloor coupled with a relatively low proportion of volcanic rocks. Based on proportions of recovered lithologies, the entire area may be underlain by mantle peridotite with ~20%–40% gabbroic intrusions and impregnations. Impregnated peridotites with olivine + two pyroxenes + plagioclase + spinel that apparently formed in equilibrium probably record crystallization from primitive mid-ocean-ridge basalt at pressures of 0.5–0.6 GPa. Metamorphic equilibria record isobaric cooling to ~1100°C at this pressure. Thus, the conductively cooled thermal boundary layer beneath the Mid-Atlantic Ridge in this region is >15 km thick. Combined crystallization and reaction with residual peridotite formed a series of impregnated peridotites recording increasing Na content at nearly constant Mg#; this process could explain some of the variation in fractionation-corrected Na (e.g., Na = 8.0) observed in mid-ocean-ridge basalts. Clinopyroxene textures and compositions record such impregnation processes, and they are particularly well documented for Site 1274. Other Leg 209 gabbroic rocks formed from extensive crystallization of highly evolved melts, indicating that a substantial proportion of melt entering the thermal boundary layer crystallizes entirely beneath the seafloor, with no volcanic equivalent. Alteration of peridotites occurred over a range of temperatures and is the result of three distinct processes: rock-dominated serpentinization with formation of brucite in olivine-rich lithologies, fluid-dominated serpentinization with formation of magnetite and no brucite, and fluid-dominated talc alteration with addition of SiO2 as well as H2O and oxygen. The latter two processes also exhibit detectable trace element metasomatism that is distinct in its character from the igneous impregnation described in the previous paragraph. Microstructures show that most residual peridotites were not ductilely deformed at temperatures less than ~1200°C. Structural and paleomagnetic data require tectonic rotations of relatively undeformed blocks; some rotations probably exceeded 60° around nearly horizontal axes parallel to the rift axis. Rotations occurred along several generations of high-temperature mylonitic shear zones extending deeper than 15 km depth and numerous faults at lower temperature. Early formed shear zones and faults were passively rotated around later features; such a process could have produced low-angle fault surfaces without slip on low-angle faults. This region provides end-member examples of processes that are common at many or most slow-spreading ridges. Osmium isotope ratios indicate an ancient history of depletion for residual peridotites from the 14°–16°N region along the Mid-Atlantic Ridge. Though depleted Os isotope ratios in peridotite have been reported elsewhere along the global ridge system, the values from this region are among the most depleted. In general, Os isotope ratios from mid-ocean-ridge basalts are systematically more radiogenic than Os isotope ratios from ridge peridotite samples, suggesting a polygenetic heterogeneous source for mid-ocean-ridge basalts. Geochemical studies of zircons from Leg 209 gabbroic rocks and impregnated peridotites, together with other ridge and arc-related zircons, indicate that ridge zircons have systematically lower fractionation-corrected U and Th concentrations compared to arc zircons. This observation provides a tool for interpreting the tectonic provenance of ancient detrital zircons and indicates an arclike provenance for Hadean detrital zircons. Geobiological studies and aerobiological studies were also undertaken during Leg 209. The geobiological work found no measurable microbial enhancement of olivine dissolution rate, possibly because the samples from Leg 209 were sterile. The aerobiological study determined that dust from North Africa, collected from the derrick of the JOIDES Resolution during Leg 209, contains a variety of abundant microorganisms.
Proceedings ODP, scientific results, 209

hal-00407966
https://hal.archives-ouvertes.fr/hal-00407966
DOI : 10.2973/odp.proc.sr.209.001.2007

Éditeur(s) : United States Defense Mapping Agency Hydrographic / Topographic Center ( Bethesda, Maryland )
Résumé : (Language) Parallel text in English and French.
Relief shown by contours and spot heights. Contour interval 10 meters, supplementary contours 5 meters.
Title from upper margin.
"This sheet falls within NE 18-4, 1501, 1:250,000, and 5674 II, E732, 1:50,000."
Includes inset guide to street index, guide to numbered features, glossary, and location and boundaries maps.
"NSN 7643014018684."
"NIMA REF. NO. E935XGONAIVES."
(Statement of Responsibility) prepared and published by the Defense Mapping Agency Hydrographic/Topographic Center.
Haiti -- Gonaïves
Gonaïves (Haiti)
Gonaïves (Haiti)

Droits : This item is a work of the U.S. federal government and not protected by copyright pursuant to 17 U.S.C. §105.
49848370
002787234
http://ufdc.ufl.edu/UF00098798/00001

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
We performed torsional deformation experiments on pre-hydrated fine-grained olivine aggregates using an innovative experimental assembly to investigate water weakening in mantle rocks at high shear strains. San Carlos olivine powder was cold-pressed and then hot-pressed under hydrous conditions, producing aggregates with average grain sizes of 7 or 15 μm. Deformation experiments were performed in a high-resolution gas-medium apparatus equipped with a torsional actuator, under a confining pressure of 300 MPa, a temperature of 1200 °C, and constant shear strain rates ranging from 8 × 10−5 to 1.4 × 10−4 s−1. Maximum shear stresses range from 150 to 195 MPa. These values are 30% lower relative to those determined in previous torsion experiments on dry, fined-grained dunites under similar conditions. Textures and microstructures of the starting and deformed specimens were characterized by scanning and transmission electron microscopy. All deformed aggregates exhibit a shape-preferred orientation marking a foliation and lineation, as well as a reduction in mean grain size from 15 μm down to 3-4 μm due to dynamic recrystallization. Olivine crystallographic fabrics developed rapidly (γ < 0.1), but their strength, characterized by the J-index, is low compared to naturally deformed peridotites or to polycrystalline olivine deformed at similar finite shear strains under dry conditions. The crystallographic fabrics are consistent with deformation by a dislocation accommodated creep mechanism with activation of multiple {0 k l}[1 0 0] systems, among which the (0 1 0)[1 0 0] slip system is dominant, and minor participation of the (0 1 0)[0 0 1] slip system. Transmission electron microscopy confirmed the occurrence of dislocations with [1 0 0] and [0 0 1] Burgers vectors in most grains. Analysis of unpolarized infrared spectra indicates that hydrogen concentration in the olivine lattice is below the saturation level of 18 ppm wt H2O, which is similar to those typically observed in spinel-bearing peridotite xenoliths, and also provide evidence for water-rich inter-granular material trapped in pores and grain boundaries. Seismic properties computed from the CPO observations correspond to those most commonly observed in naturally deformed mantle peridotites with fast P-wave propagation and S-wave polarization subparallel to the shear direction. These torsion experiments on fine-grained olivine polycrystals under hydrous conditions indicate that water weakening under lithospheric conditions is linked to various defects with hydrogen in the olivine structure, as well as with water-derived species in grain boundaries or pores.
ISSN: 0031-9201

hal-00745170
https://hal.archives-ouvertes.fr/hal-00745170
DOI : 10.1016/j.pepi.2012.05.001

Éditeur(s) : HAL CCSD Cambridge University Press (CUP)
Résumé : We present detailed biostratigraphy based on conodonts and palaeoenvironmental trends deduced from microfacies and conodont abundance through the Famennian (Late Devonian) at Col des Tribes (Montagne Noire, France). The succession is characterized by micritic limestones deposited in settings oscillating between mid to outer ramp. Facies contain poor fauna, widely dominated by nektonic organisms. This section is complete and one of the most conodont-rich for the Famennian of the north Gondwana-related area. The Upper Kellwasser event (Frasnian–Famennian boundary) and the Hangenberg (Devonian–Carboniferous boundary) have been lithologically identified. They are characterized by decimetre-thick black dysoxic to anoxic argillaceous sediments. The Condroz and annulata events, although not materialized by lithological changes, have been positioned due to the precise stratigraphy. The first event occurred during the deposition of condensed ferruginous facies (griotte limestones) and the second event during the deposition of micrites barren of benthic fauna. The combination of information from both facies and conodont biofacies changes allows a general sea-level curve through the entire Famennian for north Gondwana to be proposed for the first time. At Col des Tribes, the general trend is a slight deepening upwards from triangularis to trachytera zones, then a pronounced shallowing-upwards trend from upper trachytera to praesulcata zones. This curve correlates with the well-known reference curve from Euramerica concerning the late Famennian (trachytera to praesulcata Zones). There are some discrepancies in minor cycles which can be explained by tectonical phenomena at the onset of the edification of the Variscan belt in Europe.
ISSN: 0016-7568

hal-01115222
https://hal.archives-ouvertes.fr/hal-01115222
DOI : 10.1017/S0016756813000927

Éditeur(s) : Amer Geophysical Union
Résumé : After the January 12, 2010, Haiti earthquake, we deployed a mainly offshore temporary network of seismologic stations around the damaged area. The distribution of the recorded aftershocks, together with morphotectonic observations and mainshock analysis, allow us to constrain a complex fault pattern in the area. Almost all of the aftershocks have a N-S compressive mechanism, and not the expected left-lateral strike-slip mechanism. A first-order slip model of the mainshock shows a N264 degrees E north-dipping plane, with a major left-lateral component and a strong reverse component. As the aftershock distribution is sub-parallel and close to the Enriquillo fault, we assume that although the cause of the catastrophe was not a rupture along the Enriquillo fault, this fault had an important role as a mechanical boundary. The azimuth of the focal planes of the aftershocks are parallel to the north-dipping faults of the Transhaitian Belt, which suggests a triggering of failure on these discontinuities. In the western part, the aftershock distribution reflects the triggering of slip on similar faults, and/or, alternatively, of the south-dipping faults, such the Trois-Baies submarine fault. These observations are in agreement with a model of an oblique collision of an indenter of the oceanic crust of the Southern Peninsula and the sedimentary wedge of the Transhaitian Belt: the rupture occurred on a wrench fault at the rheologic boundary on top of the under-thrusting rigid oceanic block, whereas the aftershocks were the result of the relaxation on the hanging wall along pre-existing discontinuities in the frontal part of the Transhaitian Belt. Citation: Mercier de Lepinay, B., et al. (2011), The 2010 Haiti earthquake: A complex fault pattern constrained by seismologic and tectonic observations, Geophys. Res. Lett., 38, L22305, doi:10.1029/2011GL049799.
Geophysical Research Letters (0094-8276) (Amer Geophysical Union), 2011-11 , Vol. 38 , N. L22305 , P. 7 p.

Droits : 2011 by the American Geophysical Union
http://archimer.ifremer.fr/doc/00054/16557/14071.pdf
DOI:10.1029/2011GL049799
http://archimer.ifremer.fr/doc/00054/16557/