中文摘要：

在中亚造山带东段华北地台北缘,识别出一套原认为是燕山期的晚古生代哈达庙石英闪长岩,其LA-ICP-MS锆石U-Pb年龄为272.9±2.4Ma（MSWD=2.0）。哈达庙石英闪长岩及其相伴出露的哈达庙含金花岗斑岩,都具有高钾钙碱性I型花岗岩的性质,∑REE较低,LREE富集明显,具有中等到弱的铕负异常,与原始地幔相比,都具有大离子亲石元素（LILE）K、Rb、Th、Zr、Hf,轻稀土元素（LREE）La、Ce,相对高场强元素（HFSE）Nb、Ta、Ti、P富集的消减带组分（SZC）特性,并且具有陆缘弧火山岩的特征。从石英闪长岩到含Au花岗斑岩,具有板块碰撞前到同碰撞的岩石特征;通过Sr、Nd、Pb同位素分析,认为哈达庙金矿杂岩主要来源于壳、幔混源,具有新生下地壳（古岛弧带）的特征;石英闪长岩的先期熔出为贫硫化物斑岩型金矿成矿元素在花岗斑岩体内的富集创造了条件;哈达庙含金花岗斑岩异常富集易熔流体相元素（Rb、Ba、Th、U、K）可能是成矿岩体与非成矿岩体的鉴别标志。本文为在中亚造山带东段华北地台北缘寻找与古亚洲洋俯冲增生碰撞有关金矿提供了线索。

英文摘要：

A suite of Late Paleozoic Hadamiao quartz diorites were discovered in the northern part of the North China Platform within eastern Central Asia Orogen,which were previously considered to be products of Yanshanian intrusion and fractionation.U-Pb age dating with the LA-ICP-MS method yielded 272.9±2.4 Ma （MSWD=2.0）,which represents the crystallization age of the quartz diorites.The Hadamiao quartz diorites and the associated Hadamiao auriferous granitic porphyries all show features of high-potassium and calc-alkaline I-type.The quartz diorites can be distinguished from the auriferous granitic porphyries in high content of Al2O3,FeOT,CaO,MgO,TiO2,Sr,high mantle components（Co,Ni,Cr,Mn）,and low content of SiO2,K,Ta,Th,U.The total REE content is quite low,lower than the REE content of intermediate rocks in the crust （∑REE=196×10-6） and that of acid rocks in the crust（∑REE=290×10-6）.LREE is evidently enriched,and medium to weak negative anomalies of Eu can be seen.The granitic porphyries are stronger than the quartz diorites in the fractionation between LREE and HREE and the manifestation of negative anomalies of Eu.Compared with the primitive mantle,they are obviously enriched in LILE （K,Rb,Th,Zr,Hf ） and depleted in HFSE （Nb,Ta,Ti,P）,indicating features of SZC and continental arc.Both the quartz diorites and the auriferous granitic porphyries show features of fore-collision and syn-collision between plates.An isotopic analysis of Sr,Nd and Pb reveals that the original rocks of the Hadamiao complex were derived from the mixture of the crust and the mantle,assuming characteristics of newly-formed lower crust （paleoisland arc）.The model ages of Nd （tDM=1 054～1 260 Ma） in Hadamiao area are comparable with those of the Bainaimiao arc greenschists （1 130±16 Ma）,suggesting the existence of some genetic relations.The relation graph of La/Sm versus La and the changing degree of the magma concentrations indicate that the quartz diorites were formed by crystallization separation wher