安徽沙溪含铜斑岩^(40)Ar-^(39)Ar定年及其地质意义  

^(40)Ar-^(39)Ar DATING OF COPPER (GOLD)-BEARING PORPHYRY IN SHAXI, ANHUI PROVINCE AND ITS GEOLOGICAL SIGNIFICANCE

作　　者：傅斌[1] 任启江[2] 邢凤鸣 徐兆文[2] 胡文瑄[2] 郑永飞[1] 

机构地区：[1]中国科学技术大学地球与空间科学系 [2]南京大学地球科学系 [3]安徽地质科学研究所

出　　处：《地质论评》1997年第3期310-316,共7页Geological Review

基　　金：国家自然科学基金;中国科学院专项基金

摘　　要：据^(40)Ar-^(39)Ar测年,确定安徽沙溪含铜(金)斑岩体为早白垩世岩浆活动产物。Sr,Nd同位素数据及岩石化学资料显示,该岩体的成因与邻区侵入岩体存在明显差异,它可能是受部庐断裂活动所控制。这说明斑岩型铜(金)矿化可能主要沿郯庐断裂带及其分支断裂发育。今后找矿应沿郯庐断裂带及其分支断裂进行。According to 40 Ar-39 Ar dating, a copper-bearing porphyry complex in Shaxi, Anhui province is determined to be a product of magmatic evolution during early Cretaceous. Sm and Nd isotopic data and petrochemical analysis show considerable differences between the Shaxi porphyry and the intrusions in its adjacent areas, suggesting that the formation of the Shaxi porphyry be controlled by the Tancheng-Lujiang Fault Zone. Therefore, it is proposed that copper (gold)-bearing porphyry in this area should be looked for along the Tancheng-Lujiang Fault Zone.

关 键 词：斑岩 含铜 氩40 氩39 同位素定年 地质意义 

分 类 号：P588.13[天文地球—岩石学] P597[天文地球—地质学]