地质通报Issue(1)：27-42,16.
冀东黄柏峪-羊崖山地区太古宙岩浆作用和变质作用--SHRIMP锆石U-Pb定年
摘要
Abstract
This paper reports SHRIMP zircon U-Pb ages of eight samples for different types of Archean meta-magmatic rocks in the Huangbaiyu-Yangyashan area, eastern Hebei Province, which include meta-gabbro, biotite plagioclase gneiss, gneissic monzo⁃granite and gneissic K-rich granite. 3.1Ga monzogranite (sample J1111) was identified for the first time in the area. Biotite plagioclase gneiss (sample J1116) also probably formed at ~3.0Ga. In meta-gabbros (samples J1109 and J1110), which are considered to form at the end of the Neoarchean although no ~2.5Ga magmatic zircon age has been determined, there are a few trapped zircons of 3.2~3.6Ga. Almost all samples record~2.5Ga metamorphic zircon ages. Combined with early studies, the authors have arrived at following conclusions: (1) Tectono-thermal events of the Late Neoarchean were well developed, ~2.5Ga metamorphism, mantle magmatism and crust-derived granite formation were all caused by magma underplating resulting from upwelling of asthenosphere;(2)>2.8Ga con⁃tinental materials widely occur in eastern Hebei Province, and there might exist an ancient continental nucleus in the Huangbaiyu-Yangyashan area.关键词
冀东/新太古代/岩浆作用/变质作用/SHRIMP锆石U-Pb定年Key words
eastern Hebei Province/Neoarchean/magmatism/metamorphism/SHRIMP zircon U-Pb dating分类
天文与地球科学引用本文复制引用
孙会一,颉颃强,刘守偈,董春艳,刘敦一,万渝生..冀东黄柏峪-羊崖山地区太古宙岩浆作用和变质作用--SHRIMP锆石U-Pb定年[J].地质通报,2016,(1):27-42,16.基金项目
国家自然科学基金项目（批准号41472169）和中国地质调查局项目 （）
