青海大学学报（自然科学版）
青海大學學報（自然科學版）
청해대학학보（자연과학판）
JOURNAL OF QINGHAI UNIVERSITY (NATURAL SCIENCE EDITION)
2015年
3期
73-79
,共7页
董进生%谈晓樱%刘建栋%殷占虎
董進生%談曉櫻%劉建棟%慇佔虎
동진생%담효앵%류건동%은점호
变质侵入体%同碰撞环境%北祁连
變質侵入體%同踫撞環境%北祁連
변질침입체%동팽당배경%북기련
metamorphic intrusion%syn collision environment%North Qilian Mountains
为探讨北祁连构造岩浆带发展演化，在北祁连中东段古元古代托赖岩群中采集一套变质侵入体，岩性为二长花岗质片麻岩、片麻状石英二长岩，通过单颗粒锆石铀—铅同位素测年，该变质侵入体年龄为（1150±3）Ma，时代为晚蓟县世，侵入体具有过铝钙碱性系列的特征，是同碰撞环境下岩浆作用产物。该套变质侵入岩的发现，对于北祁连中东段前震旦纪基底的深入研究及更进一步恢复和确定北祁连构造岩浆带发展演化世具有重要意义。
為探討北祁連構造巖漿帶髮展縯化，在北祁連中東段古元古代託賴巖群中採集一套變質侵入體，巖性為二長花崗質片痳巖、片痳狀石英二長巖，通過單顆粒鋯石鈾—鉛同位素測年，該變質侵入體年齡為（1150±3）Ma，時代為晚薊縣世，侵入體具有過鋁鈣堿性繫列的特徵，是同踫撞環境下巖漿作用產物。該套變質侵入巖的髮現，對于北祁連中東段前震旦紀基底的深入研究及更進一步恢複和確定北祁連構造巖漿帶髮展縯化世具有重要意義。
위탐토북기련구조암장대발전연화，재북기련중동단고원고대탁뢰암군중채집일투변질침입체，암성위이장화강질편마암、편마상석영이장암，통과단과립고석유—연동위소측년，해변질침입체년령위（1150±3）Ma，시대위만계현세，침입체구유과려개감성계렬적특정，시동팽당배경하암장작용산물。해투변질침입암적발현，대우북기련중동단전진단기기저적심입연구급경진일보회복화학정북기련구조암장대발전연화세구유중요의의。
In order to explore the North Qilian tectonic magmatic evolution development zone in northern Qilian ,a set of metamorphic intrusive body samples with monzogranite gneiss and gneissic quartz monzonite of the Middle East section of Paleoproterozoic rock group was collected .The single Zircon U-Pb isotopic dating reveals that the age of metamorphic intrusive body is (1 150 ±3)Ma, belonging to late Jixian Period .The intrusions have the characteristics of aluminum calc alkaline se-ries,with magmatic products under impact environment .The metamorphic intrusive rocks found in northern Qilian has important significance on the research of the Middle East section of pre Sinian basement and further restoration and determination of the North Qilian tectonic magmatic belt deve-lopment and evolution .
