论文部分内容阅读
发育大量BIF铁矿的霍邱杂岩中含有大量的>2.6 Ga的岩石,很少有2.6~2.5 Ga的记录(Wang et al.,2014;Liu et al.,2015;Liu and Yang,2015),而华北克拉通其他地区广泛发育2.6~2.5 Ga的岩石(如TTG片麻岩)。锆石Hf同位素研究表明,在2.8~2.7 Ga时期,该杂岩主要发生的是老陆壳的再造(Liu
Huoqiu complex with large amount of BIF iron ore contains a large number of rocks> 2.6 Ga with few records of 2.6 ~ 2.5 Ga (Wang et al., 2014; Liu et al., 2015; Liu and Yang, 2015) While 2.6 ~ 2.5 Ga rocks (such as TTG gneiss) are widely developed in other parts of North China Craton. Hf isotopic study of zircon shows that during the 2.8-2.7 Ga period, the main occurrence of this complex is the reworking of the old continental crust