Éditeur(s) : Kjobenhavn : H. Hagerups Boghandel
Extrait de : E Museo lundii. En Samling af Afhandlinger om de i det indre Brasiliens Kalkstenshuler af Professor Dr Peter Wilhelm Lund udgravede og i den Lundske palaeontologiske Afdeling af Kjøbenhavns Universitets zoologiske Museum opbevarede Dyre- og Menneskeknogler (après p. 239)
Résumé : Tapirus cristatellus : ossements de paresseux fossiles
Siècle(s) traité(s) : 19
Permalien : http://www.manioc.org/images/TLS17098-0263i1
TLS17098-0263i1

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
We review the geodynamic evolution of the Aegea-Anatolia region and discuss strain localisation there over geological times. From Late Eocene to Present, crustal deformation in the Aegean backarc has localised progressively during slab retreat. Extension started with the formation of the Rhodope Metamorphic Core Complex (Eocene) and migrated to the Cyclades and the northern Menderes massif (Oligocene and Miocene), accommodated by crustal-scale detachments and a first series of core complexes (MCCs). Extension then localised in Western Turkey, the Corinth Rift and the external Hellenic arc after Messinian times, while the North Anatolian Fault penetrated the Aegean Sea. Through time the direction and style of extension have not changed significantly except in terms of localisation. The contributions of progressive slab retreat and tearing, basal drag, extrusion tectonics and tectonic inheritance are discussed and we favour a model (1) where slab retreat is the main driving engine, (2) successive slab tearing episodes are the main causes of this stepwise strain localisation and (3) the inherited heterogeneity of the crust is a major factor for localising detachments. The continental crust has an inherited strong heterogeneity and crustal-scale contacts such as major thrust planes act as weak zones or as zones of contrast of resistance and viscosity that can localise later deformation. The dynamics of slabs at depth and the asthenospheric flow due to slab retreat also have influence strain localisation in the upper plate. Successive slab ruptures from the Middle Miocene to the Late Miocene have isolated a narrow stripe of lithosphere, still attached to the African lithosphere below Crete. The formation of the North Anatolian Fault is partly a consequence of this evolution. The extrusion of Anatolia and the Aegean extension are partly driven from below (asthenospheric flow) and from above (extrusion of a lid of rigid crust).
ISSN: 0040-1951

insu-00715950
https://hal-insu.archives-ouvertes.fr/insu-00715950
https://hal-insu.archives-ouvertes.fr/insu-00715950/document
https://hal-insu.archives-ouvertes.fr/insu-00715950/file/Jolivet-Aegean_Tectonophysics-2012.pdf
DOI : 10.1016/j.tecto.2012.06.011

Éditeur(s) : HAL CCSD American Geophysical Union
Résumé : International audience
Progress in seismic methodology and ambitious large-scale seismic projects are enabling high-resolution imaging of the continental crust. The ability to constrain interpretations of crustal seismic data is based on laboratory measurements on rock samples and calculations of seismic properties. Seismic velocity calculations and their directional dependence are based on the rock microfabric, which consists of mineral aggregate properties including crystallographic preferred orientation (CPO), grain shape and distribution, grain boundary distribution, and misorientation within grains. Single-mineral elastic constants and density are crucial for predicting seismic velocities, preferably at conditions that span the crust. However, high-temperature and high-pressure elastic constant data are not as common as those determined at standard temperature and pressure (STP; atmospheric conditions). Continental crust has a very diverse mineral composition; however, a select number of minerals appear to dominate seismic properties because of their high-volume fraction contribution. Calculations of microfabric-based seismic properties and anisotropy are performed with averaging methods that in their simplest form takes into account the CPO and modal mineral composition, and corresponding single crystal elastic constants. More complex methods can take into account other microstructural characteristics, including the grain shape and distribution of mineral grains and cracks and pores. Dynamic or active wave propagation schemes have recently been developed, which offer a complementary method to existing static averaging methods generally based on the use of the Christoffel equation. A challenge for the geophysics and rock physics communities is the separation of intrinsic factors affecting seismic anisotropy, due to properties of crystals within a rock and apparent sources due to extrinsic factors like cracks, fractures, and alteration. This is of particular importance when trying to deduce crustal composition and the state of deformation from seismic parameters.
ISSN: 8755-1209

Droits : info:eu-repo/semantics/OpenAccess
hal-01685568
https://hal.archives-ouvertes.fr/hal-01685568
https://hal.archives-ouvertes.fr/hal-01685568/document
https://hal.archives-ouvertes.fr/hal-01685568/file/Almqvist_et_al-2017-Reviewssur Geophysics.pdf
DOI : 10.1002/2016RG000552

Éditeur(s) : HAL CCSD
Résumé : International audience
This paper deals with the study of the kinematic dimension of scribbling activities executed by kindergarten children aged from 3 to 6 years old from three grades. For this purpose, three sigma-lognormal features, six classical ones and one hybrid feature related to visuo-motor skills are extracted from scribbles realized using five different Type Grib. The statistical analysis of these data illustrates that sigma-lognormal modeling can satisfactorily reconstruct kindergarten children’s scribbles. Moreover, this preliminary study confirms that there are significant differences between grades with respect to six of the features we studied, regardless of the nature of the scribbling movement made by children. These features are related to rapidity, fluidity and precision of linear and curvilinear movements used for scribbling tasks.
17th Biennial Conference of the International Graphonomics Society
Pointe-à-Pitre, Guadeloupe

hal-01165910
https://hal.univ-antilles.fr/hal-01165910
https://hal.univ-antilles.fr/hal-01165910/document
https://hal.univ-antilles.fr/hal-01165910/file/IGS_2015_submission_28.pdf

Résumé : This expedition was arranged on the initiative of Professor Erik Stensiö of Stockholm to collect fossil specimens for the British Museum (Natural History), the Palaeontologisk Museum, Oslo, and the Hiksmuseum , Stockholm. The chief object was to explore the Old Red Sandstone deposits in the geologically little known Wood Bay area and also in the neighbouring fjords on the north coast. The plans were given in The Polar Record, No. 18, and the final party, which was led by Professor E. A. Steusic with the support of A. Heintz of Oslo, consisted of E. Jarvik (Stockholm), G. Wangsjo (Uppsala), Sven Foyn and K. Aarhus (Oslo), X. Delle (Riga), E. I. White and W. N. Croft (London), J . A. Moy-Thomas (Oxford) and J. Brough (Manchester). C. Andreasen, a sealer from Tromso, brought the collecting party up to twelve. [NOT CONTROLLED OCR]

Droits : Scott Polar Research Institute, Cambridge, UK
http://archimer.ifremer.fr/doc/1940/publication-7341.pdf
http://archimer.ifremer.fr/doc/00000/7341/

Éditeur(s) : AIHP-GEODE : Archéologie Industrielle, Histoire, Patrimoine/Géographie- Développement Environnement de la Caraïbe CRPLC : Centre de Recherche sur les Pouvoirs Locaux dans la Caraïbe Université de Paris I Panthéon-Sorbonne IHRF-IHMC : Institut d
Extrait de : "La révolution française et les colonies. Couleur de peau dans l'espace colonial français (1777-1815)" : grand séminaire, les 17 et 18 mai 2016. Université des Antilles
Description : Fredrik Thomasson (Université d'Uppsala, Suède) ouvre une réflexion sur les Libres de couleurs à Saint-Barthélémy, de 1785-1831. La séquence historique choisie débute avec l'arrivée des Suédois en 1785 à Saint-Barthelémy (l'île venant d'être cédée par la France) et se termine par l'abolition de la classe des Libres de couleurs en 1831, abolition qui précédera l'abolition de l'esclavage dans la libre seize ans plus tard, puis la rétrocession de l'île de Saint-Barthélemy à la France en 1877.
Siècle(s) traité(s) : 19
Droits : CC-BY-NC-ND - Attribution - Pas d'utilisation commerciale - Pas de modification
Permalien : http://www.manioc.org/fichiers/V16106
V16106
V16106

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
ISSN: 0167-9457

hal-01313456
https://hal.archives-ouvertes.fr/hal-01313456

Éditeur(s) : HAL CCSD American Geophysical Union (AGU)
Résumé : Structural, metamorphic, and geochronologic work shows that the Ampelos/Dilek nappe of the Cycladic blueschist unit in the eastern Aegean constitutes a wedge of high-pressure rocks extruded during early stages of orogeny. The extrusion wedge formed during the incipient collision of the Anatolian microcontinent with Eurasia when subduction and deep underthrusting ceased and the Ampelos/Dilek nappe was thrust southward over the greenschist-facies Menderes nappes along its lower tectonic contact, the Cycladic-Menderes thrust, effectively cutting out a ∼30- to 40-km-thick section of crust. The upper contact of the Ampelos/Dilek extrusion wedge is the top-to-the-NE Selçuk normal shear zone, along which the Ampelos/Dilek nappe was exhumed by ∼30–40 km. Detailed Rb-Sr and 40Ar/39Ar dating of mylonites demonstrates that both shear zones operated between 42 and 32 Ma. There is no evidence for episodic motion during the ∼10 Myr life span of the shear zones, suggesting that both shear zones operated in a steady, nonepisodic fashion. Our data provide supporting evidence that simultaneous thrust-type and normal sense shearing can accomplish the early exhumation of deep-seated rocks
ISSN: 0278-7407

hal-00405013
https://hal.archives-ouvertes.fr/hal-00405013
DOI : 10.1029/2005TC001872

Éditeur(s) : HAL CCSD American Geophysical Union
Résumé : International audience
The seismic behavior of the Himalayan arc between central Nepal and Arunachal Pradesh remains poorly understood due to the lack of observations concerning the timing and size of past major and great earthquakes in Bhutan. We present here the first paleoseismic study along the Himalayan topographic front conducted at two sites in southern central Bhutan. Paleoseismological excavations and related OxCal modeling reveal that Bhutan experienced at least two great earthquakes in the last millennium: one between the seventeenth and eighteenth century and one during medieval times, producing a total cumulative vertical offset greater than 10 m. Along with previous studies that reported similar medieval events in Central Nepal, Sikkim, and Assam, our investigations support the occurrence of either (i) a series of great earthquakes between A.D. 1025 and A.D. 1520 or (ii) a single giant earthquake between A.D. 1090 and A.D. 1145. In the latter case, the surface rupture may have reached a total length of ~800 km and could be associated with an earthquake of magnitude Mw = 8.7–9.1.
ISSN: 0148-0227

hal-01622276
https://hal.archives-ouvertes.fr/hal-01622276
DOI : 10.1002/2015JB012733

Éditeur(s) : Kjobenhavn : H. Hagerups Boghandel
Extrait de : E Museo lundii. En Samling af Afhandlinger om de i det indre Brasiliens Kalkstenshuler af Professor Dr Peter Wilhelm Lund udgravede og i den Lundske palaeontologiske Afdeling af Kjøbenhavns Universitets zoologiske Museum opbevarede Dyre- og Menneskeknogler (après p. 239)
Résumé : Subulo simplicicornus : autres ossements de cervidés
Siècle(s) traité(s) : 19
Permalien : http://www.manioc.org/images/TLS17098-0257i1
TLS17098-0257i1

Éditeur(s) : Kjobenhavn : H. Hagerups Boghandel
Extrait de : E Museo lundii. En Samling af Afhandlinger om de i det indre Brasiliens Kalkstenshuler af Professor Dr Peter Wilhelm Lund udgravede og i den Lundske palaeontologiske Afdeling af Kjøbenhavns Universitets zoologiske Museum opbevarede Dyre- og Menneskeknogler (après p. 239)
Résumé : Mastodon andium : ossements de mastodontes
Siècle(s) traité(s) : 19
Permalien : http://www.manioc.org/images/TLS17098-0265i1
TLS17098-0265i1

Éditeur(s) : Kjobenhavn : H. Hagerups Boghandel
Extrait de : E Museo lundii. En Samling af Afhandlinger om de i det indre Brasiliens Kalkstenshuler af Professor Dr Peter Wilhelm Lund udgravede og i den Lundske palaeontologiske Afdeling af Kjøbenhavns Universitets zoologiske Museum opbevarede Dyre- og Menneskeknogler (après p. 239)
Résumé : Equus curvidens : ossements de chevaux fossiles
Siècle(s) traité(s) : 19
Permalien : http://www.manioc.org/images/TLS17098-0261i1
TLS17098-0261i1

Éditeur(s) : Kjobenhavn : H. Hagerups Boghandel
Extrait de : E Museo lundii. En Samling af Afhandlinger om de i det indre Brasiliens Kalkstenshuler af Professor Dr Peter Wilhelm Lund udgravede og i den Lundske palaeontologiske Afdeling af Kjøbenhavns Universitets zoologiske Museum opbevarede Dyre- og Menneskeknogler (après p. 239)
Résumé : Auchenia major : espèce de camélidé disparue (ossements des pattes)
Siècle(s) traité(s) : 19
Permalien : http://www.manioc.org/images/TLS17098-0251i1
TLS17098-0251i1

Éditeur(s) : Kjobenhavn : H. Hagerups Boghandel
Extrait de : E Museo lundii. En Samling af Afhandlinger om de i det indre Brasiliens Kalkstenshuler af Professor Dr Peter Wilhelm Lund udgravede og i den Lundske palaeontologiske Afdeling af Kjøbenhavns Universitets zoologiske Museum opbevarede Dyre- og Menneskeknogler (après p. 239)
Résumé : Auchenia major : espèce de camélidé disparue (ossements de la machoire)
Siècle(s) traité(s) : 19
Permalien : http://www.manioc.org/images/TLS17098-0249i1
TLS17098-0249i1

Éditeur(s) : Kjobenhavn : H. Hagerups Boghandel
Extrait de : E Museo lundii. En Samling af Afhandlinger om de i det indre Brasiliens Kalkstenshuler af Professor Dr Peter Wilhelm Lund udgravede og i den Lundske palaeontologiske Afdeling af Kjøbenhavns Universitets zoologiske Museum opbevarede Dyre- og Menneskeknogler (après p. 239)
Résumé : Auchenia major : espèce de camélidé disparue (ossements des pattes)
Siècle(s) traité(s) : 19
Permalien : http://www.manioc.org/images/TLS17098-0253i1
TLS17098-0253i1

Éditeur(s) : Kjobenhavn : H. Hagerups Boghandel
Extrait de : E Museo lundii. En Samling af Afhandlinger om de i det indre Brasiliens Kalkstenshuler af Professor Dr Peter Wilhelm Lund udgravede og i den Lundske palaeontologiske Afdeling af Kjøbenhavns Universitets zoologiske Museum opbevarede Dyre- og Menneskeknogler (après p. 239)
Résumé : Dicotyles stenocephalus : cranes de pécaris, proches des cochons
Siècle(s) traité(s) : 19
Permalien : http://www.manioc.org/images/TLS17098-0259i1
TLS17098-0259i1

Éditeur(s) : Kjobenhavn : H. Hagerups Boghandel
Extrait de : E Museo lundii. En Samling af Afhandlinger om de i det indre Brasiliens Kalkstenshuler af Professor Dr Peter Wilhelm Lund udgravede og i den Lundske palaeontologiske Afdeling af Kjøbenhavns Universitets zoologiske Museum opbevarede Dyre- og Menneskeknogler (après p. 239)
Résumé : Subulo simplicicornus : crânes de cervidés
Siècle(s) traité(s) : 19
Permalien : http://www.manioc.org/images/TLS17098-0255i1
TLS17098-0255i1

Éditeur(s) : HAL CCSD Oxford University Press (OUP)
Résumé : International audience
Rifting in a cratonic lithosphere is strongly controlled by several interacting processes including crust/mantle rheology, magmatism, inherited structure and stress regime. In order to better understand how these physical parameters interact, a 2 yr long seismological experiment has been carried out in the North Tanzanian Divergence (NTD), at the southern tip of the eastern magmatic branch of the East African rift, where the southward-propagating continental rift is at its earliest stage. We analyse teleseismic data from 38 broad-band stations ca. 25 km spaced and present here results from their receiver function (RF) analysis. The crustal thickness and Vp/Vs ratio are retrieved over a ca. 200 × 200 km2 area encompassing the South Kenya magmatic rift, the NTD and the Ngorongoro-Kilimanjaro transverse volcanic chain. Cratonic nature of the lithosphere is clearly evinced through thick (up to ca. 40 km) homogeneous crust beneath the rift shoulders. Where rifting is present, Moho rises up to 27 km depth and the crust is strongly layered with clear velocity contrasts in the RF signal. The Vp/Vs ratio reaches its highest values (ca. 1.9) beneath volcanic edifices location and thinner crust, advocating for melting within the crust. We also clearly identify two major low-velocity zones (LVZs) within the NTD, one in the lower crust and the second in the upper part of the mantle. The first one starts at 15–18 km depth and correlates well with recent tomographic models. This LVZ does not always coexist with high Vp/Vs ratio, pleading for a supplementary source of velocity decrease, such as temperature or composition. At a greater depth of ca. 60 km, a mid-lithospheric discontinuity roughly mimics the step-like and symmetrically outward-dipping geometry of the Moho but with a more slanting direction (NE–SW) compared to the NS rift. By comparison with synthetic RF, we estimate the associated velocity reduction to be 8–9 per cent. We relate this interface to melt ponding, possibly favouring here deformation process such as grain-boundary sliding (EAGBS) due to lithospheric strain. Its geometry might have been controlled by inherited lithospheric fabrics and heterogeneous upper mantle structure. We evidence that crustal and mantle magmatic processes represent first order mechanisms to ease and locate the deformation during the first stage of a cratonic lithospheric breakup.
ISSN: 0956-540X

hal-01622078
https://hal.archives-ouvertes.fr/hal-01622078
https://hal.archives-ouvertes.fr/hal-01622078/document
https://hal.archives-ouvertes.fr/hal-01622078/file/plasmanGJI2017.pdf
DOI : 10.1093/gji/ggx177

Éditeur(s) : CRPLC : Centre de Recherche sur les Pouvoirs Locaux dans la Caraïbe
Description : Fredrik Thomasson (professeur à l'Université d'Uppsala, Suède) propose une étude sur la situation des Gens de couleurs et des Noirs libres dans l'histoire de la Saint-Barthélemy suédoise, entre 1784 et 1878. Il présente les aspects d'une présence suédoise méconnue dans l'histoire coloniale de la Caraïbe avec l'implantation suédoise à Saint-Barthélemy et la fondation de la ville de Gustavia (en honneur du roi Gustave III très attaché à la politique d'Outre-mer de la Couronne suédoise) et de son port franc. C'est ainsi que la ville de Gustavia comptait 5492 habitants en 1812 répartis entre les esclaves (un quart environ de la population), les Blancs (un quart également) et les Libres de couleur (la moitié restante). D'où la réflexion proposée sur le traitement de la population noire, esclaves ou libres, dans le système judiciaire mise en place par la colonisation suédoise.
Siècle(s) traité(s) : 18
Droits : CC-BY-NC-ND - Attribution - Pas d'utilisation commerciale - Pas de modification
Permalien : http://www.manioc.org/fichiers/V16119
V16119

Éditeur(s) : HAL CCSD Nature Publishing Group
Résumé : International audience
Lateral variations along the Himalayan arc are suggested by an increasing number of studies and carry important information about the orogen’s segmentation. Here we compile the hitherto most complete land gravity dataset in the region which enables the currently highest resolution plausible analysis. To study lateral variations in collisional structure we compute arc-parallel gravity anomalies (APaGA) by subtracting the average arc-perpendicular profile from our dataset; we compute likewise for topography (APaTA). We find no direct correlation between APaGA, APaTA and background seismicity, as suggested in oceanic subduction context. In the Himalayas APaTA mainly reflect relief and erosional effects, whereas APaGA reflect the deep structure of the orogen with clear lateral boundaries. Four segments are outlined and have disparate flexural geometry: NE India, Bhutan, Nepal & India until Dehradun, and NW India. The segment boundaries in the India plate are related to inherited structures, and the boundaries of the Shillong block are highlighted by seismic activity. We find that large earthquakes of the past millennium do not propagate across the segment boundaries defined by APaGA, therefore these seem to set limits for potential rupture of megathrust earthquakes.
ISSN: 2045-2322

hal-01420404
https://hal.archives-ouvertes.fr/hal-01420404
https://hal.archives-ouvertes.fr/hal-01420404/document
https://hal.archives-ouvertes.fr/hal-01420404/file/hetenyi2016.pdf
DOI : 10.1038/srep33866