中文摘要：

付坊岩体出露于华南武夷山中段,属早古生代花岗岩体。在大量地质资料的基础上,对付坊岩体的岩石学、岩石地球化学、同位素地球化学及LA-ICM-MS锆石U-Pb定年进行了系统研究。研究表明,付坊岩体主要由二长花岗岩、花岗闪长岩及少量英云闪长岩组成,岩石中含有石榴石、矽线石等富铝矿物。A/CNK值为0.99～1.14,属弱过铝质-强过铝质。微量元素以富集大离子元素Rb,Th,Cs和稀土元素La,Ce,Nd,亏损Ba,Sr,Nb,Ta,P,Ti为特征,总体上属低Ba-Sr花岗岩范畴。Rb/Sr（0.56～1.19,平均值为0.92）和Rb/Nb比值（6.85～25.18,平均值为15.43）高于中国东部及全球地壳平均值。二长花岗岩和花岗闪长岩均具有较高的稀土总量（平均值分别为243.7×10-6和251.6×10-6）,轻稀土富集明显,配分模式明显呈右倾型。Eu亏损相对明显,Eu/Eu＊=0.44～0.61（平均值为0.53）。对付坊岩体中的一个花岗闪长岩和两个二长花岗岩进行了LA-ICP-MS锆石U-Pb年龄测定,其结果分别为（443.9±3.5）Ma（MSWD=1.09）,（443.1±4.6）Ma（MSWD=0.25）和（433.6±3.9）Ma（MSWD=0.61）。其中前两组年龄在误差范围内一致,属奥陶期末同源岩浆分异演化产物。后一组年龄略晚,属早志留世花岗岩。研究表明,付坊岩体属S型花岗岩类,岩浆来源于古元古代（Nd模式年龄为2153Ma～2249Ma）地壳组分的低程度的部分熔融,其源岩主要由含少量泥质的砂质岩组成。形成于奥陶纪末的花岗岩属同碰撞（同造山）期花岗岩,形成于挤压环境,区域上分布局限。志留纪花岗岩形成于后碰撞（后造山）伸展环境,区域上分布广泛。

英文摘要：

The Fufang granitoid pluton,outcroped in the middle part of Wuyi Mountain area,is a typical Early Paleozoic pluton in the eastern segment of South China.Based on large amount of geological data during regional geological survey,the authors carried out a systematic study on petrography,geochemistry and LA-ICM-MS zircon U-Pb dating for the Fufang pluton.This pluton is mainly composed of monzogranite,granodiorite and in less amount tonalite containing Al-rich mineral,such as garnet and sillimanite.The A/CNK values are 0.99～1.14,categorized as weakly peraluminous and strong peraluminous.In trace elements,the Fufang pluton is enriched in LILE Rb,Th,Cs and rare earth elements La,Ce,Nd,and depleted in Ba,Sr,Ta,P,Ti.Thus,the Fufang pluton is a low Ba-Sr granite on the whole.The Rb/Sr and Rb/Nb ratios are 0.56～1.19（everaging 0.92）and 6.85～25.18（everaging 15.43）,respectively,higher than the average values of the upper crust in eastern China and the world.The Fufang pluton has a higher ∑REE with LREE enrichment.Their distribution patterns are clearly right-wing type with relatively clear Eu depletion（δEu=0.44～0.61,averaging 0.53）.The emplacement ages of the pluton obtained for zircons from 1 sample of granodiorite and 2 samples of monzogranite are（443.9±3.5）Ma（MSWD=1.09）,（443.1±4.6）Ma（MSWD=0.25）and（433.6±3.9）Ma（MSWD=0.61）,respectively.The first two sets of data are consistent ages within error range which shows that they were resulted from the differentiation and evolution of a co-magmatic chamber.The later one is obviously later and belongs to the later stage of the Early Paleozoic.The research results show that the Fufang pluton is of S-type granite,derived from the continental crust by lower degree of partial melting and its source rocks were mainly composed of pelitic sandstone rocks.The formation was probably linked with the collision between the fragments of Cathaysia Old Land and Yangtze block or collision among the fragments of Cathaysia Old Land.The earlier granitoi