RRS Discovery Cruise 158, 12 April - 12 May 1986. An investigation of phytodetrital sedimentation in the Porcupine Seabight

[摘要] idc cicience of further vein mineralisation beyond the limits of the workings. Elswhere the biggest concentration of�� Pb and Zn anomalies and the greatest amplitude of anonlaly (2000 ppm Pb) wcrc located over the northern outcrop of the the main unit of tuffaceous volcanic rocks, particularly in the .icinity of the farm Pen Rhiw Frank. A clctailccl geological, geochemical and geophysical survey of the Pen Rhiw Frank area was carried out using photogeological interpretation, further soil sampling and a combination of IP/resistivity, VLF, SP and magnetic surveys. Geological interpretation indicated that the area was divided into fault blocks and the geophysical work re

[发布机构] Institute of Oceanographic Sciences