地质论评2016，Vol.62Issue(5)：1211-1224,14.DOI:10.16509/j.georeview.2016.05.009
冀西北尚义黄土窑地区尚义杂岩和红旗营子群的锆石S HRIMP U-Pb定年及地质意义
SHRIMP U-Pb Zircon Ages of Shangyi Complex and Hongqiyingzi Group in Huangtuyao,Shangyi,Northwestern Hebei and Their Geological Significance
摘要
Abstract
The Shangyi Complex is a representative metamorphic block in northwestern Hebei and is composed of supracrustal and intrusive rocks.The metamorphic supracrustal rocks were once considered to be late Neoarchean ophiolite oceanic relic.The Hongqiyingzi Group also occurs in the area.We carried out SHRIMP U-Pb zircon dating on different types of rocks of Shangyi Complex and Hongqiyingzi Group from a geological section in Huangtuyao,east of Shangyi.Garnet-bearing biotite plagioclase gneiss (HB1410)has 310~2500 Ma zircon cores and ~255 Ma metamorphic rims.All detrital zircons from biotite plagioclase gneiss (HB141 1 )and quartzite (HB1415)are ~2.5 Ga in age but no metamorphic zircon age have been obtained for them.Gabbro (HB1518) and quartz diorite (HB1519)have magmatic zircons with ages of 278~279 Ma.Based on these data and previous work,it is concluded that the majority of the Hongqiyingzi Group and Shangyi Complex are not late Neoarchean in age,and they are a tectonic complex being composed of geological units of different ages,such as Paleozoic metasediments,metavolcanic rocks and intrusive rocks as well as some early Paleoproterozoic to Neoarchean relics. It is evident that the Central Asian Orogen strongly influenced the northern margin of the North China Craton during the late Paleozoic.关键词
冀西北/尚义杂岩/晚古生代/锆石SHRIMP U-Pb定年Key words
Northwestern Hebei/Shangyi Complex/Late Paleozoic/SHRIMP U-Pb zircon dating引用本文复制引用
白文倩,刘永顺,颉颃强,董春艳,王树庆,胡晓佳,万渝生..冀西北尚义黄土窑地区尚义杂岩和红旗营子群的锆石S HRIMP U-Pb定年及地质意义[J].地质论评,2016,62(5):1211-1224,14.基金项目
本文为中国地质调查局地质调查项目（编号1212011220465、1212010811033）的成果。 （）
