西安科技大学学报2017，Vol.37Issue(5)：680-687,8.DOI:10.13800/j.cnki.xakjdxxb.2017.0513
花岗岩类特征对准噶尔盆地基底性质的示踪
Features of granites and its implications on the property of basement of Junggar Basin
摘要
Abstract
The debate on basement property of Junggar Basin has been exciting for a long time.The disputable property is mainly focused on oceanic or continental crust.And the existence of Precambrian crystalline basement in this area is also controversial.Investigation on granites from orogens around the basin can indicate the forming evolution of crust,and implicate the property of basement.On the basis of review on domestic and overseas citeratures,the distinct difference of isotopic dating and εNd value of granites from outcrops in different districts around the Junggar Basin indicates the diversity of tectonic activities and crustal component of different districts.Generally,the granites in Paleozoic and early Mesozoic formed between 425 ～ 230 Ma with εNd (t)values ranging from + 10 to-5,which indicate that the origins of granites outcrops from different periods around the basin are complex,and mainly derived fromdecrease mantle,then followed by mixed crust and mantle,and crust.Above all,certain scales of old terrane exist in the basement of Junggar Basin.And Paleozoic continental crusts mixed with remaining pieces of a shattered progenitor possibly exist at the south and north Junggar Basin.关键词
花岗岩/同位素定年/εNd(t)值/基底/准噶尔盆地Key words
granite/isotope dating/εNd (t) value/basement/Junggar Basin分类
天文与地球科学引用本文复制引用
樊婷婷,柳益群,白清华,赵伟波..花岗岩类特征对准噶尔盆地基底性质的示踪[J].西安科技大学学报,2017,37(5):680-687,8.基金项目
国家自然科学基金青年基金(41641018) （41641018）
陕西省自然科学基础研究计划项目(2017JQ4028) （2017JQ4028）
