矿物岩石地球化学通报
礦物巖石地毬化學通報
광물암석지구화학통보
BULLETIN OF MINERALOGY PETROLOGY AND GEOCHEMISTRY
2015年
4期
674-681
,共8页
樊祺诚%赵勇伟%陈生生%李霓%隋建立
樊祺誠%趙勇偉%陳生生%李霓%隋建立
번기성%조용위%진생생%리예%수건립
大兴安岭-太行山重力梯度带以西%第四纪火山活动%成因与构造意义
大興安嶺-太行山重力梯度帶以西%第四紀火山活動%成因與構造意義
대흥안령-태행산중력제도대이서%제사기화산활동%성인여구조의의
the west of the Daxing'anling-Taihangshan gravity lineament%Quaternary volcanic activities%origin and tec-tonic significance
大兴安岭—太行山重力梯度带以西的第四纪火山活动自北往南贯穿兴蒙造山带和华北克拉通2个大地构造单元,可以分为北、中、南三部分,展现规模不等的火山群:北部诺敏河火山群和绰尔河—哈拉哈河火山群,中部阿巴嘎火山群和达里诺尔火山群,南部大同火山群和乌兰哈达火山群。这些火山群主要由单成因火山组成,少则几十座,多则200余座,如阿巴嘎火山群向北延入蒙古达里干加,构成亚洲东部面积最大的新生代火山区。因此,大兴安岭—太行山重力梯度带以西的第四纪火山成为探讨大陆内部火山活动构造背景与成因机制的重要场所,也是获取大兴安岭—太行山重力梯度带东西两侧和兴蒙造山带与华北克拉通2个大地构造单元岩石圈差异演化信息的重要窗口。本文介绍了这些火山的分布、构造背景和成因机制。
大興安嶺—太行山重力梯度帶以西的第四紀火山活動自北往南貫穿興矇造山帶和華北剋拉通2箇大地構造單元,可以分為北、中、南三部分,展現規模不等的火山群:北部諾敏河火山群和綽爾河—哈拉哈河火山群,中部阿巴嘎火山群和達裏諾爾火山群,南部大同火山群和烏蘭哈達火山群。這些火山群主要由單成因火山組成,少則幾十座,多則200餘座,如阿巴嘎火山群嚮北延入矇古達裏榦加,構成亞洲東部麵積最大的新生代火山區。因此,大興安嶺—太行山重力梯度帶以西的第四紀火山成為探討大陸內部火山活動構造揹景與成因機製的重要場所,也是穫取大興安嶺—太行山重力梯度帶東西兩側和興矇造山帶與華北剋拉通2箇大地構造單元巖石圈差異縯化信息的重要窗口。本文介紹瞭這些火山的分佈、構造揹景和成因機製。
대흥안령—태행산중력제도대이서적제사기화산활동자북왕남관천흥몽조산대화화북극랍통2개대지구조단원,가이분위북、중、남삼부분,전현규모불등적화산군:북부낙민하화산군화작이하—합랍합하화산군,중부아파알화산군화체리낙이화산군,남부대동화산군화오란합체화산군。저사화산군주요유단성인화산조성,소칙궤십좌,다칙200여좌,여아파알화산군향북연입몽고체리간가,구성아주동부면적최대적신생대화산구。인차,대흥안령—태행산중력제도대이서적제사기화산성위탐토대륙내부화산활동구조배경여성인궤제적중요장소,야시획취대흥안령—태행산중력제도대동서량측화흥몽조산대여화북극랍통2개대지구조단원암석권차이연화신식적중요창구。본문개소료저사화산적분포、구조배경화성인궤제。
Quaternary volcanic activities in the west of the Daxing'anling-Taihangshan gravity lineament stretch,from north to south,across two different geotectonic setting,the Xing'an Mongolian orogenic belt and the North China Craton.The volcanic activities generated three volcanic clusters with various sizes:Nuominhe volcanic cluster and Chaoerhe-Halahahe volcanic cluster in the north,Abaga volcanic cluster and Dalinuoer volcanic cluster in the middle,and Datong volcanic cluster and Wulanhada volcanic cluster in the south.These volcanic clusters consist mainly of monogenetic volcanos with the cone number from dozens to more than 200.For example,the Abaga-Dalinuoer volcanic field in Inner Mongolia ex-tends northwestward into the adjacent Dariganga lava plateau of Mongolia,forming the largest Cenozoic volcanic fields in eastern Asia.Thus,the west of Daxing'anling-Taihangshan gravity lineament is a key place to (1 )discuss origin and tec-tonic setting of intra-continent volcanic activity,and (2)study differential evolutions between the east and west sides of the Daxing'anling-Taihangshan gravity lineament and between the Xing'an Mongolian orogenic belt and the North China Craton.