地幔岩

Secondary orthopyroxene has also been documented in mantle peridotite xenoliths derived from beneath both active arcs and ancient cratons.

交代的斜方辉石在现代活动岛弧和古克拉通的地幔橄榄岩捕掳体中多有报道。

The rock occurs some 20km or more down, although in areas where plate tectonics have forced up some of the mantle, peridotite reaches the surface.

这种岩石出现在地表20或20公里以下地方，但在有些区域的板块构造运动已迫使一些地幔，橄榄岩上升到地表。

Keywords: Emeishan large igneous province; picrite; geochemistry; mantle plume; petrogenesis

中文关键词：峨眉山大火成岩省；苦橄岩；地球化学；地幔柱；岩石成因

The lower lithospheric mantle in western Shandong could be composed of Group Ⅰ inclusions which were subjected to orthopyroxene vein or orthopyroxene+ phlogopite vein and disseminated phlogopite metasomatism.

鲁西区软流圈的顶部，即岩石圈地幔的底部应为一套组Ⅰ型包体，它们存在斜方辉石交代脉体和斜方辉石+金云母的交代脉体以及弥漫型金云母；向上(约43～57km±)为一套堆积岩。

The picrite field, located in the southwest of Emeishan continental flood basalts and with the center in Lijiang—Dali—Panzhihua triangular area, is about 5×104 km2 and regarded as the axial area of the Emei mantle plume.

峨眉山大陆溢流玄武岩的西南部以丽江、大理和攀枝花三角区为中心的苦橄岩分布区，面积约5×10 4 km2 ，为峨眉地幔柱的轴部区。

Emeishan large igneous province; picrite; geochemistry; mantle plume; petrogenesis

中文主题词：峨眉山大火成岩省；苦橄岩；地球化学；地幔柱；岩石成因

They have A/CNK values of 0.9～1.2, suggesting aluminum saturation or ersaturation, and are enriched in LREE and LILEs and depleted in HFSEs. Their δEu values are 0.11～0.32, evidently indicating plagioclase fractional crystallization.(87Sr/86Sr)i ratios and εNdvalues are 0.707?9～0.716?1 and -6.90～-7.70 for volcanic rocks, and 0.7086～0.7098 and -7.10～-7.68 for quartz syenitic porphyrite, respectively, implying that all the igneous rocks from the Yandang Mountain were evolutional products of co-magmas, and derived mainly from the crust, mixed however with mantle components.

岩石富集轻稀土元素和大离子亲石元素，相对亏损高场强元素；δEu值为0.11～0.32，表明岩浆经历了以斜长石为主的强烈结晶分异作用；火山岩(87Sr/86Sr)i为0.707 9～0.716 1，εNd为-6.90～-7.70，中央侵入体石英正长斑岩(87Sr/86Sr)i为0.708 6～0.709 8，εNd为-7.10～-7.68，表明它们是同源岩浆不同阶段分异演化的产物，物质来源主要为陆壳，但也有地幔物质参与。

The correlatability between BIF and its wall rocks in the primitive mantlenormalized incompatible element spider diagrams suggests that they have the same or similar material source and diagenetic environment, as well as belonging to a same depositional basin, but with different deposition processes and conditions, respectively.

BIF与其围岩在原始地幔标准化不相容元素蛛网图中的相关性说明二者有相同或相似的物质来源和成岩环境，二者同属一个沉积盆地，但却有不同的沉积过程和形成条件。

The PGE distributive patterns are the PtPd type, the Pt/Pd ratios of 0.32-0.68 are between the values of enriched sulfide tholeiite (0.38) and primitive upper mantle (1.36), and the similarity of partition patterns of chondritenormalized REE, MORB-normalized trace element and primitive mantle normalized PGE for the rocks of the three phase zones, indicate the Baimazhai intrusive body I formed by the evolution, liquation, intrusion and diagenesismetallogenesis of basaltic magma.

铂族元素配分模式为Pt-Pd型，w/w比值为0.32~0.68，介于富硫化物拉斑玄武岩(0.38)和原始上地幔(1.36)之间，以及稀土元素配分模式、微量元素蛛网图和铂族元素配分模式中不同岩石配分曲线的相似性揭示3个相带不同岩石之间的高度一致性，展示基性-超基性岩形成于玄武质岩浆演化、熔离及岩浆一次性侵入、分异成岩成矿的特征。

It is suggested that the pyroxenite xenoliths were formed by the crystallization differentiation of the differentiated mantle-derived magma.

伊通新生代玄武岩中存在3种不同成因的捕虏体，其中上地幔岩浆分异结晶形成的辉石岩捕虏体中尖晶石具有独特的成分分带。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。