%0 Journal Article
%T The geochronology and geochemistry of intrusive rocks in Bange area: Constraints on the evolution time of the Bangong Lake-Nujiang ocean basin<br>西藏班戈地区侵入岩年代学和地球化学: 对班公湖-怒江洋盆演化时限的制约
%A GAO ShunBao
%A ZHENG YouYe
%A WANG JinShou
%A ZHANG Zhong
%A YANG Cheng
%A <br>高顺宝
%A 郑有业
%A 王进寿
%A 张众
%A 杨成
%J 岩石学报
%D 2011
%I 
%X Field geological survey, U-Pb zircon chronology and rock geochemistry study shows that the intrusive rock of Bange region can be divided into four periods: early Early-Cretaceous quartz diorite and tonalite (138Ma±), the middle Early-Cretaceous granodiorite (132~128Ma), the middle-late Early-Cretaceous two-mica adamellite (130~114Ma), Late-Cretaceous adamellite (80Ma±). From the north to south, the petrogenic age of intrusive rock is from late to early, and the formation environment is from island-arc environment to syn-collosional orogenic environment to post-collisional environment. This result provides new information about the subduction polarity and evolution time of Bangong Lake-Nujiang ocean basin. The southward subduction of the Bangong Lake-Nujiang Ocean Basin is beginning before Middle Jurassic in Bange area, and it lasts to the middle Early-Cretaceous (130~125Ma), and finally close in the middle Early-Cretaceous (125Ma±). Then the collision of the Lhasa terrane and the Qiangtang terrane started, after 20~30Myr enter to post-collosional stage in early Late-Cretaceous (100~80Ma).
%K Intrusive rocks
%K Geohronology
%K Bangong Lake-Nujiang ocean basin
%K Tectonic evolution<br>侵入岩
%K 年代学
%K 班公湖-怒江洋盆
%K 构造演化
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=e62459d214fd64a3c8082e4ed1ababed5711027bbbddd35b&cid=621cf755b1a341e5&jid=2013b5467e3054b1614cec199353fced&aid=062df269b6e16a3e7c41ed2c957b1a53&yid=9377ed8094509821&vid=db817633aa4f79b9&iid=df92d298d3ff1e6e&sid=2cf50acb94270f08&eid=3f3d540c9b7906de&journal_id=1000-0569&journal_name=岩石学报&referenced_num=1&reference_num=11