华北克拉通北缘白云鄂博群和腮林忽_省略_定年_Hf同位素分析及其地质意义_马铭株.pdf

1000-0569 /2014 /030 (10)-2973-88 Acta Petrologica Sinica 岩石学报 华北克拉通北缘白云鄂博群和腮林忽洞群底部碎屑 * 锆石U-Pb 定年、Hf 同位素分析及其地质意义 马铭株1 章雨旭2 颉颃强1 万渝生1 MA MingZhu1 ，ZHANG YuXu2 ，XIE HangQiang1 and WAN YuSheng1 1. ， 100037 中国地质科学院地质研究所北京离子探针中心 北京 2. ， 100037 中国地质科学院 北京 1. Beijing SHＲIMP Center ，Institute of Geology ，Chinese Academy of Geological Sciences，Beijing 100037，China 2. Chinese Academy of Geological Sciences，Beijing 100037，China 2014-01-19 收稿，2014-03-25 改回. Ma MZ ，Zhang YX ，Xie HQ and Wan YS. 2014. SHＲIMP U-Pb dating and LA-ICPMS Hf isotope analysis of detrital zircons from medium- to coarse-grained sandstones of the Bayan Obo Group and Sailinhudong Group and its geological :2973 － 2988 significances. Acta Petrologica Sinica ，30 (10) Abstract The Bayan Obo Group ，located in the northern margin of the North China Craton ，is well-known due to the occurrence of a super-large ＲEE-Nb-Fe deposit. It is debatable that the Bayan Obo Group formed in Mesoproterozoic or Paleozoic. The Sailinhudong Group occurs in the south of the Bayan Obo Group ，with different opinions on both being same or not in formation age. This paper reports SHＲIMP U-Pb ages and LA-ICPMS Hf isotopes of detrital zircons from medium-to coarse-grained sandstones of the Bayan Obo Group and Sailinhudong Group in the northern margin of the North China Craton. Detrital zircons from the lower parts of the two groups are similar in shape and external and internal textures ，and can be divided into four types ，namely trapped or inherited ，magmatic ， metamorphic and incompletely recrystallized zircons. The different types of detrital zircons from the two groups have similar age distributions