Zircon U–Pb geochronology and Hf isotopes of major lithologies from the Jiaodong Terrane: Implications for the crustal evolution of the Eastern Block of the North China Craton Meiling Wu a , Guochun Zhao a, ⁎, Min Sun a , Sanzhong Li b , Zhian Bao c , Pui Yuk Tam a , Paul R. Eizenhöefer a , Yanhong He c a Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong b College of Marine Geosciences, Ocean University of China, Qingdao 266003, China c State Key Laboratory of Continental Dynamics, Northwest University, Xi'an 710068, China abstract article info Article history: Received 17 June 2013 Accepted 4 December 2013 Available online 11 December 2013 Keywords: Archean Crustal accretion North China Craton Jiaodong Terrane Zircon The Jiaodong Terrane of the Eastern Shandong Complex in the Eastern Block of the North China Craton (NCC) consists predominantly of Archean granitoid gneisses with minor supracrustal rock enclaves or lenses. This study presents new zircon LA-ICP-MS U–Pb and Lu–Hf isotopic data for these lithologies, which help to better understand the Archean crustal evolution of the Eastern Block of the NCC. Magmatic zircon U–Pb data reveal that zircons in the supracrustal rocks and granitoid gneisses were generated by multi-stage events at ~2.9 Ga, ~2.7 Ga and ~2.5 Ga. Metamorphic zircon U–Pb data obtained for these rocks show distinct metamorphic ages at ~2.50 and ~1.9–1.8 Ga, suggesting that the Jiaodong Terrane ex- perienced a regional metamorphic event at the end of the Neoarchean and encountered reworking by a tectonothermal event that was associated with the formation of the Paleoproterozoic Jiao–Liao–Ji Belt. Magmatic zircons have variable ε Hf (t) values from -5.5 to +7.7 with model ages of 3.92–2.57 Ga, of which most ε Hf (t) values are positive with a predominant peak of model ages at 3.4–3.1 Ga and a subordinate peak at 2.8–2.7 Ga. These Hf features reveal major juvenile crustal growth stages with significant additions of older crustal materials at 3.4–3.1 Ga and 2.8–2.7 Ga, and a crustal reworking event with minor juvenile additions at ~2.5 Ga in the Jiaodong Terrane. © 2013 Elsevier B.V. All rights reserved. 1. Introduction In the past decade, major advancements in ideas on the formation and evolution of the North China Craton (NCC) have been made following the recognition of three Paleoproterozoic mobile belts, namely the Trans- North China Orogen (TNCO), the Khondalite Belt and the Jiao-Liao-Ji Belt (Fig. 1; Zhao et al., 2012). Extensive investigations on these belts have re- vealed that the EW-trending Khondalite Belt was formed by the collision between the Yinshan Block and the Ordos Block at ~1.95 Ga to form the Western Block of the NCC (Santosh, 2010; Santosh et al., 2006, 2007, 2009; Xia et al., 2006a, 2006b; Yin et al., 2009, 2011; Zhao et al., 2005, 2012). likewise, the NE–SW-trending Jiao-Liao-Ji Belt was formed by col- lision between the Longgang and Langrim Blocks at ~1.95 Ga to form the Eastern Block (Li et al., 2005, 2006; Zhao et al., 2005, 2011; Zhou et al., 2008a, 2008b), which then collided with the Western Block along the TNCO at ~1.85 Ga to form the NCC (Guo et al., 2002, 2005; Kröner et al., 2005, 2006; Li et al., 2010; Liu et al., 2011a, 2011b; Wilde and Zhao, 2005; Wilde et al., 2002; Zhai and Santosh, 2011; Zhang et al., 2006, 2007, 2009; Zhao and Cawood, 2012; Zhao and Guo, 2012; Zhao et al., 2001, 2005; Zheng et al., 2013). There are now coherent outlines of the timing and tectonic processes involved in these Paleoproterozoic amal- gamations and much knowledge has been obtained concerning the pre- collisional history of these Paleoproterozoic collisional belts. However, comparatively little is known about the tectonic history of the Archean micro-continental blocks in the NCC, which has hampered a further un- derstanding of the Archean crustal evolution of the craton. This is the case with the Precambrian basement in the Eastern Shandong Complex, where the tectonic nature of the Paleoproterozoic Jiao-Liao-Ji Belt has been well studied but the crustal evolution of the closely associated Archean basement rocks, namely the Jiaodong Terrane, still remains largely unknown. Available data show that most of the Neoarchean basement rocks in the Eastern Block were formed at ~2.6–2.5 Ga and then experi- enced widespread regional metamorphism at ~2.5 Ga, characterized by anticlockwise P–T paths (Geng et al., 2006, 2010, 2012; Grant et al., 2009; Kröner et al., 1998; Liu et al., 2011a, 2011b; Lü et al., 2012; Shen et al., 2007; Wu et al., 2012, 2013; Yang et al., 2008). Lithos 190–191 (2014) 71–84 ⁎ Corresponding author at: Department of Earth Sciences, James Lee Science Building, The University of Hong Kong, Pokfulam Road, Hong Kong. Tel.: +852 28578203; fax: +852 25176912. E-mail address: gzhao@hkucc.hku.hk (G. Zhao). 0024-4937/$ – see front matter © 2013 Elsevier B.V. All rights reserved. http://dx.doi.org/10.1016/j.lithos.2013.12.004 Contents lists available at ScienceDirect Lithos journal homepage: www.elsevier.com/locate/lithos