玄武岩的

Spine-bulk: The thickness of the spine of a book block not including the thickness of the cover boards.

脊厚：书芯厚度，它不包括书皮纸板的厚度。为了测定玄武岩岩层的厚度，测区必须扩大到沉积岩区。

Tungsten content of host basalts is usually higher than that of their mantle-derived xenoliths.

地幔岩特别是玄武岩中钼含量的高低，对地壳中钼矿床和钼矿集中区的分布有指示意义。

In contrast, the less abundant HT and LT2 basalts may imply a weakening of the influence of the mantle plume activity.

相反，厚度较小的HT和LT2玄武岩则可能是意味着地幔柱活动影响的减弱。

Answering these problems will play an important role not only in the study of the Emeishan basalts and the mantle_plume interaction, but also in the investigation of their relation to mineralization.

这些问题的解决，对研究娥眉山玄武岩本身以及地幔柱－岩石圈的相互作用及其成矿效应均具有重要意义。

Chinese Academy of Sciences , Beijing 100029 , ChinaAbstract : The content s of such platinum-group element s as Ir , Ru , Rh , Pt and Pd in J ianguo basalt s and Wula 2 hada Mg- high andesites were determined using ICP-MS after a nickel sulfide fire assay preconcent ration.

采用镍锍火试金法结合 ICP-MS 分析了碱锅玄武岩和乌拉哈达高镁安山岩样品中的 Ir 、 Ru 、 Rh 、 Pt 和 Pd 的含量。

The deep-seated xenoliths entrained by the Cenozoic Hannuoba basalts can be divided into three groups according to their mineral assemblages:Ⅰ Granulites, including felsic granulites, noritic granulites, and dominantly, two-pyroxene granulites,Ⅱ Pyroxenites, including websterites, spinel pyroxenites, and garnet pyroxenites;Ⅲ Peridotites, including spinel lherzolites and spinelgarnet lherzolites.

根据新生代汉诺坝玄武岩中深源岩石捕掳体的矿物组合类型，将其分为主要的三大类：麻粒岩类中包括长英质麻粒岩、苏长质麻粒岩和二辉麻粒岩，辉石岩类包括二辉石岩、尖晶石辉石岩和石榴子石辉石岩，橄榄岩类则包括尖晶石二辉橄榄岩和尖晶石-石榴子石二辉橄榄岩。

The gold content of mantle-derived xenoliths are usually higher than that of their host rocks.

1金在地幔岩包体中的含量通常高于寄主玄武岩中的含量。

Unlike gold, molybdenum content of host rocks is remarkably higher than that of mantle-derived xenoliths.

(1)与金不同，钼在寄主玄武岩中的含量显著高于在地幔岩包体中的含量。

The variations of helium isotopic ratios can be observed in these xenoliths andxenocrysts from different area, or even from same area, indicating that the xenocrysts didntdirectly crystallize from basaltic magma, and basaltic magma is not directly related to thesemantle lherzolites xenoliths.

提出幔源包体和高压巨晶的氦同位素组成均反映了其地幔源区的特征，与寄主玄武岩无必然成因联系。

The central peaks of several craters on the flanks of Syrtis Major are made up of an even more silica-rich rock, granite, that may have formed by extreme crystal separation or by large-scale remelting of earlier basalts.

在大三角侧面，几个火山口的中间尖点是由一种矽含量更高的岩石──花岗岩所构成，可能是经极度晶体分化，或早期玄武岩大范围重新熔融而形成。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。