%0 Journal Article
%T Geochemical comparison between high-Ti and Iow-Ti edogites from the main hole of the Chinese Continental Scientific Drill Project and its implications for rutile mineralization<br>中国大陆科学钻探主孔高钛与低钛榴辉岩地球化学特征对比及其对金红石成矿的指示意义
%A QIU JianSheng
%A WANG RuCheng
%A JIANG ShaoYong
%A HU Jian
%A ZHANG XiaoLin
%A NI Pei
%A <br>邱检生
%A 王汝成
%A 蒋少涌
%A 胡建
%A 张晓琳
%A 倪培
%J 岩石学报
%D 2006
%I 
%X The eclogite-type rutile deposit is the most important primary rutile deposit in China. Based on a comprehensive analysis of the correlations between the contents of TiO2 and other elements in eclogites from 0 - 2000m of the main hole of the Chinese Continental Scientific Drilling ( CCSD), and by taking the mean TiO2 grade of the primary rutile deposit in China into account, this paper grouped the eclogites into a high-Ti (TiO2 > 2% ) and a low-Ti (TiO2 < 2% ) subgroup, and systematically compared the geochemical differences between the two subgroups of eclogites. The investigation results have shown that the high-Ti eclogites are relatively depleted in SiO2, K2O, enriched in TFeO, and have lower Al2O3/TiO2 ratios and K2O + Na2O values. They also display vary degree depletions of Cs, Rb, Ba, Zr, Hf and enrichments of Th, U, and generally show lower LREE/HREE ratios. Integrated geochemical data indicate that the protolith of ecologite is the main constraint for the formation of the eclogite-type rutile deposit. The initial Ti enrichment in the protolith rocks is constrained by many factors, such as the source compositions, source depth, tectonic setting, partial melting degree and the crystallization differentiation process, etc. The Ti-rich basic protolith is the material base and the high-pressure regional metamorphism is the essential condition for the generation of the eclogite-type rutile deposit.
%K Eclogite
%K Rutile
%K Geochemistry
%K Chinese Continental Scientific Drilling<br>榴辉岩
%K 金红石
%K 地球化学
%K 中国大陆科学钻探
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=621CF755B1A341E5&jid=2013B5467E3054B1614CEC199353FCED&aid=C8957A12A83F6F71&yid=37904DC365DD7266&vid=BC12EA701C895178&iid=DF92D298D3FF1E6E&sid=B56549D8EAA47873&eid=8240BC26394E1210&journal_id=1000-0569&journal_name=岩石学报&referenced_num=5&reference_num=53