论文标题
原始夏威夷恢复活力的熔岩的起源：碳磷灰石化合物的证据及其对古代叶绿石源的影响
Genesis of primitive Hawaiian rejuvenated-stage lavas: Evidence for carbonatite metasomatism and implications for ancient eclogite source
论文作者
论文摘要
为了限制深碳化地幔的贡献，对于火山系列中HF相对于稀土元素（REE）的分馏，我们研究了有关主要，痕量元素和ND-HF同位素组成的可用高质量数据，这些原始熔岩和玻璃在普雷斯希尔德（Preshield），后坡度，后弹药后爆发，大多数是速率又是Hawaiian Hot of Hawaiian Hot Poce of Hawaiian Hot Poce of Paciefient Presshield爆发。 HF/SM，ZR/SM，Ti/eu，K/Th，Nb/Th，La/t，La/k和Ba/K的强烈变化不是与残留的闪石或菲洛吉属的熔体平衡的特征，并且不能是由于无用度或动态熔化的Lherzolite source的可变程度而引起的。相对于K，HF，Zr，Ti和Nb的REE，TH和BA的富集在一起，夏威夷熔岩中的低Si，高Na，K和Ca含量是碳酸岩石层岩石圈对流动性磷酸盐的组成特征。相比之下，最原始的前旋晶和后梯度岩浆的主要和痕量元素特征需要辉石源。 可用的数据指出，夏威夷瓦胡岛的Koolau火山熔岩托管的盐湖火山口石榴石异种岩是源自夏威夷羽毛岩中的深层eclogite来源。高度放射性的HF和在瓦胡岛的盐湖火山口壁垒上记录的ND-HF同位素系统学系列中记录的高度放射性HF同位素系统学系列可以解释出与REE相对于Carbonatite Persomatismism的强大HF分馏，这可能是由于古老的碳酸盐化事件，这很可能与hawaiian Plimie of the Hawaiian Plimie of Carbobonite sepluige of Carbonatite seplime of Carobonite persotics。
To constrain a contribution of deep carbonated mantle, to fractionation of Hf relative to rare earth elements (REE) in volcanic series, we examine available high-quality data on major, trace element and Nd-Hf isotope compositions of primitive lavas and glasses erupted during preshield, postshield and mostly rejuvenated stage of the Hawaiian hot spot (Pacific Ocean). Strong variations of Hf/Sm, Zr/Sm, Ti/Eu, K/Th, Nb/Th, La/K and Ba/K in the lavas are not features of the melt equilibration with residual amphibole or phlogopite, and cannot be due to variable degrees of batch or dynamic melting of uncarbonated lherzolite source. Enrichment in REE, Th and Ba relative to K, Hf, Zr, Ti and Nb together and low Si, high Na, K and Ca contents in the Hawaiian lavas are compositional features of carbonated mantle lithospheric to asthenospheric peridotite source affected by carbonatite metasomatism. In contrast, major and trace element signatures of most primitive preshield- and postshield-stage magmas require pyroxenite source. The available data infer that Salt Lake Crater garnet pyroxenite xenoliths hosted by the Koolau volcano lavas on Oahu, Hawaii, were derived from deep eclogite source likely generating the carbonatite melts within the Hawaiian plume. Highly radiogenic Hf and decoupled Nd-Hf isotope systematics recorded in the Salt Lake Crater mantle xenolith series on Oahu may be explained by strong Hf fractionation relative to REE owing to ancient event of carbonatite metasomatism, which is likely related to partial melting of the deeply subducted carbonated eclogite within the Hawaiian plume.
