摘要
Figurecaption:Top:NationalUraniumResourceEvaluation(NURE)radiometricequivalentTh(eTh;background)showshighvaluesinpartsoftheAtlanticCoastalPlaininferredtocontainelevatedmonaziteandxenotime(redoutlines);grayedareasrepresentcarbonaterocks(alsoassociatedwitheThhighs).BlacklinesdelineatebeltsofthePiedmontandBlueRidgeProvinces.Bottom:BeltsofthePiedmontandBlueRidgecoloredaccordingtorocktype.HeavymineralsandsintheAtlanticCoastalPlainshowregionalcompositionalvariationsthatsuggesttheywerederivedfromspecificrocktypes.TheserocktypescorrespondtoPiedmontorBlueRidgeunitsadjacenttoAtlanticCoastalPlainsediments.Dashedshapesdelineateareasbelievedtocontainelevatedmonaziteandxenotimeconcentrations.Alargerversionisavailable.
出版日期
2017年05月15日(中国期刊网平台首次上网日期,不代表论文的发表时间)