Geochronology, petrogenesis and tectonic implications of Paleoproterozoic granitoid rocks in the Jiaobei Terrane, North China Craton

doi:10.1016/j.precamres.2013.12.004

	Geochronology, petrogenesis and tectonic implications of Paleoproterozoic granitoid rocks in the Jiaobei Terrane, North China Craton
	Liu, Jianhui 5; Liu, Fulai ; Ding, Zhengjiang 1,2; Liu, Pinghua ; Guo, Chunli 3; Wang, Fang
刊名	PRECAMBRIAN RESEARCH
	2014
卷号	255 页码:685-698
关键词	North China Craton Jiaobei Terrane Jiao-Liao-Ji Belt Paleoproterozoic granitoid rocks Petrogenesis
ISSN号	0301-9268
DOI	10.1016/j.precamres.2013.12.004
英文摘要	Paleoproterozoic granitoid rocks in the Jiaobei Terrane of the North China Craton mainly comprise deformed hornblende/biotite-bearing monzogranitic gneisses, undeformed biotite-bearing syenogranite, and tourmaline-bearing pegmatitic granite. In order to define the emplacement ages, sources, and petro-genesis of the granitoids, we have conducted a coupled LA-ICP-MS U-Pb dating, trace element and in situ Hf isotopic study of zircons from three representative Paleoproterozoic granitoid rocks in the Jiaobei Terrane. Our new zircon U-Pb data yield emplacement ages of 2181 +/- 12 and 1801 +/- 21 Ma for deformed monzogranitic gneiss and undeformed syenogranite, respectively. The deformed hornblende/biotite-bearing monzogranitic gneisses in the Jiaobei Terrane, along with the Liaoji granitoids, define pre-tectonic granitoid events at ca. 2.2-2.0 Ga, whereas the undeformed syenogranite corresponds to the post-tectonic or anorogenic granitoid event at ca. 1.8 Ga. Zircons from the pre-tectonic hornblende-bearing monzogranitic gneiss have epsilon Hf(t) values varying from -2.13 to +6.18 (average = +1.2), two-stage Hf model ages (T-DM2) of 2313-2780 Ma and same trends of crustal evolution as ca. 2.5 Ga TTG rocks, suggesting an origin by remelting of ca. 2.5 Ga TTG rocks. Zircons from the pre-tectonic biotite-bearing monzogranitic gneiss have negative epsilon Hf(t) values of -7.36 to -2.85 (average = -5.26), two-stage Hf model ages (T-DM2) of 2930-3206 Ma and the same trends of crustal evolution as ca. 2.7 and/or ca. 2.9 Ga TTG rocks, indicating derivation by partial melting of ca. 2.7 and/or ca. 2.9 Ga TUG rocks. Zircons from the post-tectonic syenogranite display negative epsilon Hf(t) values ranging from-6.58 to -3.26 (average = -4.89), two-stage Hf model ages (T-DM2) varying from 2663 to 2868 Ma, and the same trends of crustal evolution as ca. 2.5 Ga TUG rocks, indicating an origin by partial melting of ca. 2.5 Ga TTG rocks. The linear belt of pre-tectonic, deformed A-type granitoid rocks with emplacement ages of 2.2-2.0 Ga from the Liaoji area, Jiaobei Terrane, through to the Bengbu area of Anhui Province, together with the coeval mafic intrusions and bimodal volcanic assemblages, suggest that widespread extensions occurred along the Jiao-Liao-Ji Belt in the period of 2.2-2.0 Ga. In contrast, the post-tectonic or anorogenic granitoid events may be linked to extensions following the amalgamation of the North China Craton. (C) 2013 Elsevier B.V. All rights reserved.
学科主题	火成岩岩石学
WOS关键词	LIAO-JI BELT ; PB ZIRCON AGES ; PRECAMBRIAN METAMORPHIC BASEMENT ; PRESSURE MAFIC GRANULITES ; ARCHEAN CRUSTAL EVOLUTION ; HF ISOTOPIC SYSTEMATICS ; U-TH-PB ; DETRITAL ZIRCONS ; EASTERN BLOCK ; LU-HF
WOS研究方向	Geology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000348011600011
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40573]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 2.Jilin Univ, Coll Earth Sci, Changchun 130061, Peoples R China 3.Explorat Inst Geol & Mineral Resources, Yantai 264000, Peoples R China 4.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China 5.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Liu, Jianhui,Liu, Fulai,Ding, Zhengjiang,et al. Geochronology, petrogenesis and tectonic implications of Paleoproterozoic granitoid rocks in the Jiaobei Terrane, North China Craton[J]. PRECAMBRIAN RESEARCH,2014,255:685-698.
APA	Liu, Jianhui,Liu, Fulai,Ding, Zhengjiang,Liu, Pinghua,Guo, Chunli,&Wang, Fang.(2014).Geochronology, petrogenesis and tectonic implications of Paleoproterozoic granitoid rocks in the Jiaobei Terrane, North China Craton.PRECAMBRIAN RESEARCH,255,685-698.
MLA	Liu, Jianhui,et al."Geochronology, petrogenesis and tectonic implications of Paleoproterozoic granitoid rocks in the Jiaobei Terrane, North China Craton".PRECAMBRIAN RESEARCH 255(2014):685-698.