Zircon U-Pb geochronology and Hf isotopic composition of the Hongqiyingzi Complex, northern Hebei Province: New evidence for Paleoproterozoic and late Paleozoic evolution of the northern margin of the North China Craton
Zircon U-Pb geochronology and Hf isotopic composition of the Hongqiyingzi Complex, northern Hebei Province: New evidence for Paleoproterozoic and late Paleozoic evolution of the northern margin of the North China Craton
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冀北红旗营子杂岩体锆石U-Pb年代学及Hf同位素组成：华北克拉通北缘古元古代和晚古生代演化的新证据
DOI：
10.1016/j.gr.2011.02.003
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发表时间：
2011-07
影响因子：
6.1
通讯作者：
Zhai, Ming-Guo
中科院分区：
文献类型：
--
作者：
Wang, Fang;Chen, Fukun;Siebel, Wolfgang;Li, Shuang-Qing;Peng, Peng;Zhai, Ming-Guo
红旗营子杂岩位于华北陆块北方边缘，以前被界定为古元古代。它由火山岩和沉积岩组成，经历了绿片岩-角闪岩相变质作用。本文对红旗营子杂岩的变质火成岩和沉积岩进行了锆石U-Pb年龄、Hf同位素组成和全岩Nd同位素组成的研究。年龄测定结果表明，该杂岩体的不同片麻岩主要含有晚古元古代（~ 1800 Ma）和晚古生代（~275 ~~ 300 Ma）的锆石，以及少量晚太古代的锆石。晚古生代的锆石既有岩浆颗粒状的，也有变质增生的，这两种类型的锆石可以通过它们的Th/U比值和内部结构来区分。古生代岩浆岩（Hq 14）中的锆石大多具有较高的εHf（t）值（1.5 ~ 10.8），表明地幔或新生地壳物质对岩浆源区有重要贡献。研究结果表明，红旗营子杂岩中含有前寒武纪表壳岩系和古生代岩浆岩，这些岩浆岩在晚古生代经历了强烈的变质变形作用，与西伯利亚-华北板块之间的古亚洲洋闭合有关。
The Hongqiyingzi Complex, located at the northern margin of the North China Craton, was previously defined as a Paleoproterozoic unit. It consists of volcanic and sedimentary rocks, which underwent greenschist- to amphibolite-facies metamorphism. This study presents zircon U–Pb ages and Hf isotopic composition and whole-rock Nd isotopic composition of metamorphosed igneous and sedimentary rocks from the Hongqiyingzi Complex. The age dating results show that different gneisses of this complex contain mainly late Paleoproterozoic (~1800Ma) and late Paleozoic (~275 to ~300Ma) zircons and minor late Archean zircons. Late Paleozoic zircons either occur as magmatic grains or as metamorphic overgrowth and both types of zircon can be distinguished by their Th/U ratios and internal structures. Most zircon grains of a Paleozoic magmatic rock (sample Hq14) have high εHf(t) values of 1.5 to 10.8, suggesting significant contribution of mantle or juvenile crustal material to the magma source(s). The results imply that the Hongqiyingzi Complex contains Precambrian supracrustal sequences and Paleozoic rocks of magmatic origin that underwent strong metamorphism and deformation during the late Paleozoic related to the closure of the Paleo-Asian Ocean between Siberia and the North China Craton.
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影响因子：
3.5
作者：
T. C. Liew;A.W Hofmann
通讯作者：
T. C. Liew;A.W Hofmann
华北克拉通晚古元古代基性岩脉群构造环境的地球化学约束
影响因子：
6.1
作者：
Hou, Guiting, Li,J.H, Yang,M.H.,Yao,W.H., Wang,C.C
通讯作者：
Hou, Guiting, Li,J.H, Yang,M.H.,Yao,W.H., Wang,C.C
影响因子：
1.8
作者：
B. Hu;M. Zhai;Jh Guo;P. Peng;F. Liu;S. Liu
通讯作者：
B. Hu;M. Zhai;Jh Guo;P. Peng;F. Liu;S. Liu
影响因子：
6.1
作者：
Guochun Zhao;Yanhong He;M. Sun
通讯作者：
Guochun Zhao;Yanhong He;M. Sun
DOI：
--
发表时间：
2001
期刊：
--
影响因子：
--
作者：
N. Machado;A. Simonetti
通讯作者：
N. Machado;A. Simonetti