查询词典 pegmatite

There is high tantalite grade for certain large scale granite-pegmatite pattern tantalite-columbite mine in our country.

我国某大型花岗伟晶岩型铌钽矿含钽品位高居我国钽铌矿山之首。

It is found that there is a co-relationship between the boron isotope and chemical composition of magmatic tourmaline: the δ〓B value increases with increasing Al and Li in Y-site of tourmalines. The low δ〓B values (-41. 1～-39. 01‰) in Altay No. 3 pegmatite, which is one of the lowest values found by now, imply that non-marine evaporites might exist in magma source, or the pegmatitic magma had been assimilated by them during its intrusion and emplacement.

阿尔泰3号伟晶岩最初形成的结构带中电气石的B同位素组成是目前所发现的最低值之一(-41.11～-39.01‰)，指示形成伟晶岩脉的初始岩浆可能由含非海相蒸发岩的泥质岩经变质深熔作用形成，或是伟晶岩岩浆在上侵定位过程中同化了含非海相蒸发岩地层的结果。

The saccharoidal albite zone, the second zone of Altay No. 3 pegmatite, is composed of two different fabric rocks from the field observation, and is a main zone for deposition of beryllium, phosphrus and rare-earth elements.

阿尔泰3号伟晶岩脉糖粒状钠长石带明显由两种不同组构的岩性组成，而且该带是3号脉主要的Be矿化带，也是P、REE最重要的沉淀场所。

It is explained that the large fractionation of boron isotope observed in tourmalines of Altay No. 3 pegmatite is resulted from the fractionation of boron isotopes between tourmaline and muscovite, and also tetraborate, in combination with the fractionation between fluid and melt phases.

本次研究利用电气石-白云母和电气石-四硼酸盐矿物间的同位素分馏以及熔体相-流体相间的同位素分馏，合理解释了阿尔泰3号伟晶岩脉电气石B同位素分馏过程，并首次获得伟晶岩形成、演化过程中B同位素组成演化的全程图谱。

Step-wise evaporation 207Pb-206Pb dating has been conducted for uni-genetic magmatic zircons from quartzofeldspathic gneiss and pegmatite, respectively, from Guandi complex, sporadically outcropped around Fangshan pluton in Zhoukoudian area, western Hills of Beijing.

北京西山周口店地区房山岩体周围关坻杂岩的长英片麻岩和伟晶岩脉具有类似简单岩浆结晶成因锆石的蒸发法Pb-Pb年龄。

5 Ma. These isotopic data provide important evidence for solving the problem of whether there occurred Caledonian mineralization and further support the view that pegmatites and pegmatite rare metal-muscovite deposits in the Altay area were not only formed in the Hercynian.

本次工作通过野外调查和同位素年代学研究，首次在阿尔泰西部的也拉曼大型含绿柱石白云母矿床(426±13Ma)、阿尔泰中部的那森恰大型含绿柱石白云母矿床(447.7±0.4Ma)及阿尔泰东部的青河拜兴白云母伟晶岩脉(436.0±0.5Ma)中获得了可靠的加里东期成矿的同位素年代证据，从而为解决是否存在加里东期成矿的问题提供了重要依据，并进一步认识到阿尔泰地区的伟晶岩及伟晶岩型稀有金属-白云母矿床并非只形成于海西期。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。