isotopiccomposition of lead ores in the British Isles, Sweden,Norway and Finland are comparedand analyzed. British...Precambrianand Phanerozoiclead ores are plentiful in Sweden. Since Paleozoic rocks exist only as thin, unm...Precambrianof Finland containsboth types,as in Sweden. Norwegian leads occur mainly in pyritie ores interlayered...Minor Precambrianoccurrencesof the types present in Sweden are known. It is concludedthat British leads typify...andWickmanet al. (9) supplycomparable figuresfor Sweden,which can be supplemented by previousdata for Finland |