000			021420000a22002890004500
001			DMDOC
003			OSt
005			20160615102055.0
006			m
008			150120b xxu||||| |||| 00| 0 eng d
040			_cNDC
086			_a00324-DM
100			_aDawson, J.
245			_aMineral survey reconnaissance of Dominica, British West Indies
260			_bInstitute of Geological Sciences. Overseas Dominica _aLondon _c1966
270			_dUnited Kingdom
300			_a27 p.
300			_btbls., plates, maps
520			_aA reconnaissance mineral survey of Dominica, principally to examine the possible occurrence of bauxite deposits, was carried out in October-November, 1965. Thirty samples of clay alteration products of diverse igneous and pyroclastic rocks were collected from road sections throughout the island, special attention being given to cuttings opened up by current road construction. The alumina content of all samples was too low for commercial bauxite. Though conditions favourable to bauxite formation are present, the geological young age of the rocks and the vigorous erosion to which they have been subjected since formation, militates against any large deposits having had either the time to form or to survive. Minerals concentrates were found in many of the island's rivers. Many of those occur in the oldest volcanic rocks which occupy the sector of the east coast from Rosalie to Marigot. The Saint Sauveur and Madjini Akayuma rivers, whose concentrates contain copper and lead minerals, are also located within this east coast region. Large punicious agglomerate deposits in addition to those known in the Roseau and Layou valleys, are present in the Ma Robert area, near Rosalie, and in Grand Savanne. The low levels of activity recorded by 1413A scintillometer equipment on radiometric traverses throughout the island indicate that the existence of near surface radioactive mineral deposits is unlikely.
556			_aGeneral
650			_aMINERAL RESOURCES
650			_aCLAYS
650			_aMINERALS
650			_aGEOLOGICAL SURVEYS
650			_aDOMINICA
942			_h16.02.02 _2NDC _cGL
999			_c8226 _d8226