Lithostratigraphical Correlation of the Volcanic Rock Series in Hongshanzi Basin in the Great Hinggan Mountains Range
详细信息
- 责任者：Wu Jianhua (State Key Laboratory Breeding Base of Nuclear Resources and Environment ; East China Institute of Technology ; Nanchang 330013 ; China) ; Wu Wangjun
- 刊名：Geological Journal of China Universities
- 出版年：2013
- 卷期：19(3)
- 关键词：晚侏罗世 ; Upper Jurassic ; 地层对比 ; stratigraphic correlation ; 大兴安岭 ; Greater Hinggan Mountains
- 页码：p.472-483
- 图表：3 illus., 3 tables, 36 refs.
- 分类号：1200
- issnNo：ISSN1006-7493
- isbnNo：CN32-1440/P
摘要
Because of the large time span and the age overlap of the lithostratigraphic units of Mesozoic volcanic rocks in southern Great Hingan Range,we have chosen volcanic rocks from Hongshanzi Basin to measure the SHRIMP zircon U-Pb age,together with the zircon U-Pb age of the volcanic rocks from adjacent area and the characteristics of rock associations to correlate the volcanic rock series.The zircon in two alkaline rhyolite samples(sample numbers HS505,HS102) and one high-k calc-alkaline rhyolite samples(sample numbers HS601) from Hongshanzi Basin has obvious oscillatory ring,high Th/U ratio,and they belong to typical magma genesis.The results of zircon U-Pb dating indicate that the206Pb/238U age range of 10 analysis points of sample HS601 is 150~160 Ma with the weighted average of 156.5±1.6 Ma and MSWD of 1.11.Eleven analysis points of sample HS102 is 153~159 Ma with the weighted average of 154.7±1.7 Ma and MSWD of 0.77.Fourteen analysis points of samples HS505 is 151~160 Ma with the weighted average of 156.5±1.4 Ma and MSWD of 1.16.The age range of the volcanic rocks from Hongshanzi Basin is 157~155 Ma,which belongs to the early Late Jurassic.The volcanic rocks in Hongshanzi Basin show characteristics of high-k calc-alkaline rhyolite-alkaline rhyolite associations,which are similar to those of the Xinmin Formation.The volcanic rocks are also stratigraphically correlatable.Therefore,the volcanic rocks should belong to the Xinmin Formation.The Late Jurassic felsic volcanic rocks in southern Great Hingan Range,which was previously assigned to Manketouerbo Formation and Manitu Formation,should belong to the Xinmin Formation,and the age of the revised Xinmin Formation is similar to that of mafic volcanic rocks of Tiaojishan Formation or Lanqi Formation in northern Hebei-western Liaoning and Tamulan Formation in northern Great Hingan Range,showing two zones,northerly and southerly,of rock association of the Late Jurassic volcanic rock in Northeast China.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |