Research subject. Fe- and Al-rich metapelites of the Teya, Garevka Angara complexes North Yenisei Ridge (western margin Siberian craton) were studied. methods. Recently-obtained geochronologic (SHRIMP II U-Pb zircon dating) geochemical data on distribution major trace elements used to reproduce composition age protolith, along with paleofacies formation conditions. Results. The ferruginous-alum...

Exploration of the continental slope Canadian Beaufort Sea has revealed a remarkable coalescence slide scars with headwalls between 130 and 1100 m water depth (mwd). With increased depth, widen merge into one gigantic regional scar that is more than 100 km wide below ~1100 mwd. To understand development these features, five sites were investigated an Autonomous Underwater Vehicle, which provide...

Swells of the Cameroon Line, a 1000-km-long line of 10 volcano-capped swells, resemble other volcano-capped topographic and bathymetric swells on the African plate. However, individual swells of the Cameroon Line are about 10 times smaller in area and distinct in being arranged in a straight line, half on the continent and half on the ocean floor. These peculiarities are here interpreted as rel...

Diabases, pillow lavas and basaltic flows in the Nain-Dehshir ophiolites are marked with flat to slightly depleted pattern in REE chondrite-normalized diagram and are characterized by depletion in HFSE and enrichment in LILE. This geochemical behavior can be considered for lavas erupted in arc-related environments. Clinopyroxene in these rocks shows low content of TiO2 and resemble those found ...

T study of the deep structure and evolution of passive continental margins is important for the understanding of rifting processes and the formation of associated sedimentary basins. Since the classical models of McKenzie (1978) and Wernicke (1985), understanding how passive continental margins form, that is to say mainly the way that continental lithosphere is thinned leading to subsidence, re...

Kellett, R.L., Lilley, F.E.M. and White, A., 1991. A two-dimensional interpretation of the geomagnetic coast effect of southeast Australia, observed on land and seafloor. Tectonophysics, 192: 367-382. Data from detailed investigations of the geomagnetic coast effect across the southeast Australian continental margin are inte~ret~ in terms of a tw~im~sional numerical model. There is both land an...

New U-Pb ages for detrital and igneous zircons constrain the depositional age and sedimentary provenance of the Beardmore Group, a siliciclastic succession that records transformation of the East Antarctic margin during Rodinia breakup and subsequent Gondwana amalgamation. We divide rocks previously mapped as the Beardmore Group into (1) an inboard late Neoproterozoic assemblage (probably ≤670 ...