SeaSoar sections from the Antarctic Circumpolar Current at 52S, 32E to the Subtropical Front at 37S, 52E

[摘要] A reconnaissance drainage geochemical survey was carried out at a density of about 2 samples per km2 of the Llanclrindod Wells/ Builth Wells Ordovician inlier in Powys. The rocks of the area comprise a sequence of mudstones and shales ranging in age from the Llan.irn to the Caradoc containing volcanic horizons and a lrolcanic complex of acid/intermediate composition overlain in the south by a further volcanic sequence of more basic composition. An area of about 65 km2 was sampled and from each site a wet screened minus BSI 100 mesh (< 150 micrometres) fraction and panned heavy mineral concentratc samples were obtained. Sie

[发布机构] Institute of Oceanographic Sciences Deacon Laboratory