Éditeur(s) : HAL CCSD AGU and the Geochemical Society
Résumé : International audience
Microbathymetry data, in situ observations, and sampling along the 13°20′N and 13°20′N oceanic core complexes (OCCs) reveal mechanisms of detachment fault denudation at the seafloor, links between tectonic extension and mass wasting, and expose the nature of corrugations, ubiquitous at OCCs. In the initial stages of detachment faulting and high-angle fault, scarps show extensive mass wasting that reduces their slope. Flexural rotation further lowers scarp slope, hinders mass wasting, resulting in morphologically complex chaotic terrain between the breakaway and the denuded corrugated surface. Extension and drag along the fault plane uplifts a wedge of hangingwall material (apron). The detachment surface emerges along a continuous moat that sheds rocks and covers it with unconsolidated rubble, while local slumping emplaces rubble ridges overlying corrugations. The detachment fault zone is a set of anostomosed slip planes, elongated in the along-extension direction. Slip planes bind fault rock bodies defining the corrugations observed in microbathymetry and sonar. Fault planes with extension-parallel stria are exposed along corrugation flanks, where the rubble cover is shed. Detachment fault rocks are primarily basalt fault breccia at 13°20′N OCC, and gabbro and peridotite at 13°30′N, demonstrating that brittle strain localization in shallow lithosphere form corrugations, regardless of lithologies in the detachment zone. Finally, faulting and volcanism dismember the 13°30′N OCC, with widespread present and past hydrothermal activity (Semenov fields), while the Irinovskoe hydrothermal field at the 13°20′N core complex suggests a magmatic source within the footwall. These results confirm the ubiquitous relationship between hydrothermal activity and oceanic detachment formation and evolution.
ISSN: 1525-2027

hal-01571973
https://hal.archives-ouvertes.fr/hal-01571973
https://hal.archives-ouvertes.fr/hal-01571973v2/document
https://hal.archives-ouvertes.fr/hal-01571973/file/Escart-n_et_al-2017-Geochemistry%2C_Geophysics%2C_Geosystems.pdf
DOI : 10.1002/2016GC006775

Éditeur(s) : HAL CCSD Elsevier Masson
Résumé : International audience
Cancer is the main complication of transplantation surgery. The literature concerning renal transplant recipients among the Afro-Caribbean population is scant. The aim of this study was to determine the incidence of cancer in these patients, with the secondary objective being to identify predisposing factors for cancer. This was an epidemiological and retrospective study that included all Guadeloupians of phototype V-VI undergoing renal transplantation from 01/01/2004 to 31/12/2011. Skin cancer screening was performed before transplantation and during an annual dermatological consultation following transplantation. Screening for non-cutaneous cancers was guided by clinical symptoms or by the results of the screening examinations recommended in the current guidelines. At the study time-point (31/12/2011), all patients were examined by a dermatologist. One hundred and two patients were included : 42 women and 60 men (mean age: 52.1±11.6 years at transplantation). Eight cancers were diagnosed. The cumulative incidence of cancer was 7.8% at 3 years. Three factors were associated with more rapid onset of cancer: personal history or familial history of cancer, and genital lesion induced by HPV. Our results suggest a low incidence of cancer in Afro-Caribbean renal transplant patients. Personal or family history of cancer and HPV-induced genital lesions would appear to accelerate the onset of cancer in this population.
ISSN: 0151-9638

hal-01260468
https://hal.archives-ouvertes.fr/hal-01260468
https://hal.archives-ouvertes.fr/hal-01260468/document
https://hal.archives-ouvertes.fr/hal-01260468/file/2015%2C%20Ameline.pdf
https://hal.archives-ouvertes.fr/hal-01260468/file/14%20148%20Fig%201%20ap.pdf

Éditeur(s) : Collectivité Territoriale de Guyane CTG : Collectivité Territoriale de Guyane
Extrait de : "Conférence pour le 40e anniversaire de l'arrivée des Hmong en Guyane", le 5 septembre 2017. Collectivité territoriale de Guyane
Description : Sur l'arrivée des Hmong en Guyane. Grands témoins de l'année 1977 : -M. LAU -M. Augustin YA MA -Mme N'Dzeu YA MA : la vie des femmes. Intervention de M. Jean YA SAI PO Président du comité d'organisation des fêtes de Cacao (premier né à Cacao) Témoignage de Monsieur Ya Ma Augustin : D'après le récit, la première vague de Hmong arriva le 05 septembre 1977, dispersés et éloignés de la population guyanaise qui manifestait contre leur installation. En un mois, 11 ha ont été défrichés à la main, les femmes ont fagoté les premiers légumes. 507 personnes pour monter la structure du village de Cacao, divisé en 4 quartiers afin faciliter le travail collectif. "S'il n'y a pas de volonté, il n'y a pas de réussite". La jeunesse du monde agricole doit prendre la relève et les autorités locales, mener la Guyane vers une diversité, une transformation afin que le monde agriculture trouve sa place. Intervention de Madame Ya Ma, N'Dzeu. Nostalgique, d'avoir quitté son pays avec la crainte de ce qu'ils allaient découvrir. Les premiers essaies agricoles fut difficiles, l'apprentissage de l'agriculture était faits sur le tas. Les jeunes Hmong aujourd'hui se sont intégrés, ont choisi d'être agriculteurs, ils pratiquent aussi d'autres métiers : docteurs, infirmiers, ingénieurs. Par leur intégration, ils se sentent guyanais.
Siècle(s) traité(s) : 20
Droits : CC-BY-NC-ND - Attribution - Pas d'utilisation commerciale - Pas de modification
Permalien : http://www.manioc.org/fichiers/V17223
V17223