胶东年龄胶东锶同位素胶东锶钕同位素青藏-三江的应用陈衍景等,1997,中国矽卡岩型金矿的成矿时间、空间、地球动力学背景和成矿模式.北京大学学报,v.33,p.456-466陈衍景等,1995,陆内碰撞体制流体作用和成矿作用研究意义.地球科学进展,第4期,318-322ChenYJ,1996.SkarnGoldDepositsinChina.ResourceGeology,56,p369-376青藏三江的成矿预测冈底斯成矿带:运用模型分析成矿潜力,22-12Ma中国东部成矿高峰130Ma滞后于古南海闭合(180Ma)约50Ma020406080100120140160180AgesofMesozoicgranitoidsinEasternChina4812162024283236404448801001201401601802000nMaAgesofMesozoicvolcanicrocksinEasternChinaN=499Bn花岗岩类130Ma(胡受奚)火山岩类120Ma(王德滋)红半圆:砂金黄色圆:岩金绿三角:伴生金事实:1、只是新生代沉积物产砂金;2、有岩金,才有砂金;3、岩金赋矿围岩时代:太古宙-白垩纪。结论:1、砂金源于岩金;2、岩金早于新生代形成,并在新生代裸露剥蚀;3、J-K陆相沉积物不含砂金,表明岩金形成和剥蚀不早于侏罗纪;4、J-K,即燕山期成矿!砂金时空180Ma陈衍景等,2004地质论评东部燕山期构造证据与应用Mapshowingthedistributionofcrustofagivenageandthedistributionofsignificantorogenicgoldlodeshostedwithinsuchcrust.Africa&EuropeMapshowingthedistributionofcrustofagivenageandthedistributionofsignificantorogenicgoldlodeshostedwithinsuchcrust.Australia&AsiaMapshowingthedistributionofcrustofagivenageandthedistributionofsignificantorogenicgoldlodeshostedwithinsuchcrust.America谢谢大家欢迎指正