Petrogenesis of the Early Cretaceous Lianyang Granitic Complex,South China:Tectonic and Metallogenic Implications

1 Introduction The Nanling Range of South China is characterized by widespread Mesozoic granitoids and associated W,Sn,Mo,Bi,REE and U deposits(Zhou and Li,2000;Hua et al,2007;Li et al.,2007;Mao et al,2007).Typically,the granitoids occur as composite plutons,ranging in size from tens to hundreds of square kilometers.Each composite pluton is composed of major-phase granites and late-stage granites.Most researchers believe that the latestage granites formed as a result of fractionation of the1 Introduction The Nanling Range of South China is characterized by widespread Mesozoic granitoids and associated W,Sn,Mo,Bi,REE and U deposits(Zhou and Li,2000;Hua et al,2007;Li et al.,2007;Mao et al,2007).Typically,the granitoids occur as composite plutons,ranging in size from tens to hundreds of square kilometers.Each composite pluton is composed of major-phase granites and late-stage granites.Most researchers believe that the latestage granites formed as a result of fractionation of the中国地质调查局、国际矿床成因协会2Vol.8