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- Minerals or altered minerals such as sericite, biotite and K feldspar in the altered wallrocks are selected to be objects of age determination, and the Ar Ar, K Ar, Rb Sr, U Pb isochron dating methods are adopted. 选用矿石或蚀变围岩中的绢云母、黑云母、钾长石等蚀变矿物作为测年对象 ,采用 Ar- Ar、 K- Ar法或 Rb- Sr等时线法测年在目前的技术条件下是经济可行的 ,关键是要保证被测矿物确为蚀变矿物并且纯度较高。 用 U- Pb法测定矿脉中的水热锆石来确定成矿年龄 ,但如何区分继承锆石和水热锆石尚不成熟。
- The affecting factors of low value by activation energy determination include heating duration in low temperature stage, pureness of K feldspar and mixture of some plagioclase, quartz et al. 导致活化能取值偏低的影响因素包括低温阶段的加热时间、K-长石的纯度和部分斜长石、石英的混入等。
- G-Rg1 caused right move of the concentration- response curves of NA in Krebs solution and CaCl 2 in Ca 2+-free Krebs containing K +, and decreased the maximum responses. 0 .;1mm ol· L- 1及 0
- The pig iron containing boron and boron - rich slag were produced by blast fur-nace separating. 采用高炉法处理含硼铁精矿可使铁硼有效分离得到含硼生铁和富硼渣。
- The new leaching technology, i.e. acid leaching under pressure, that is used on high iron containing sphalerite, is introduced. 提出了高铁闪锌矿加压酸浸新工艺。
- An approach to the influence of aluminium content of inoculant on graphite spheroidization of cast iron containing As,Sn,Pb and Ti was made. 探讨了复合孕育剂中铝量对含砷、锡、铅、钛铸铁石墨球化的影响。
- Inoculating the cast iron containing lead, complex alloy can improve effectively the structure and properties of the cast iron. 用含锆硅铁以及它的复合合金对含铅、砷、锡等杂质元素的铸铁进行孕育处理,可以有效地改善铸铁的组织和性能。
- The behaviour of a vermicular cast iron containing trace amounts of B and Cu was investigated and compared with that of a Cr - Mo-Cu cast iron. 本文对含微量硼铜的蠕墨铸铁性能进行试验研究,并与合金铸铁性能对比分析。
- Keywords gold deposit;alkali feldspar;K feldspar;alteration;Hebei; 金矿;碱性长石;钾长石;蚀变作用;河北;
- The effect of rare earth elements on carbide of high Cr cast iron was investigated and the continuous cooling transformation( CCT) curves of high Cr cast iron containing and not containing RE addition were determined. 研究了稀土元素对高铬铸铁中碳化物的影响,并对加稀土、加稀土的高铬铸铁试样的连续冷却转变(CT)线进行了测定。
- Effects of the amount of C.Cr.inoculation agent.samples size and heat treatment on properties of wear-resistant martensitic spheroidal graphite cast iron containing carbide are researched. 研究了碳量、铬量、孕育量、试样尺寸及热处理工艺对含碳化物马氏体抗磨球墨铸铁性能的影响。
- Keywords porphyry copper deposit;metasomatism;K feldspar rapakivi texture; 斑岩铜矿;钾长环斑结构;交代作用;找矿标志;
- The Late Archaean Fuping Group of the Xiaojue region in Pingshan County, Hebei Province contains three main metamorphic rock types, i.e. K felspar leucoleptite, semipelitic biotite leptite and biotite gneiss, and hornblendic rocks. 河北平山小觉地区晚太古代阜平群含有三种主要表壳岩性质的变质岩类,即钾长浅粒岩类,黑云变粒岩-片麻岩类和角闪质岩石类。
- Notice: the minimal usage means the usage in the welding sealed iron container, if in the humidity or inner liner plastic bag sealed package wooden container, should use double. 注:最少使用量指在焊封铁容器内的使用量,凡是在潮湿环境和采用木箱内衬塑料袋封装的包装,应采用加倍的量。
- Of, relating to, or containing feldspar. 长石的属于、关于或含长石的
- The natural iron contained in the Purple Clay Pot can disintegrate fat.This helps to balance the PH value of the body and gradually build up a health shield. 紫砂所含有的天然铁质对脂肪有分解作用,有助平衡人体酸碱度,更接近人体正常标准,从而为身体建立一个健康保护网。
- high chromium cast iron containing B 含B高铬铸铁
- Napoleon conquered by the force of an iron will. 拿破仑攻无不克靠的是坚强的意志。
- It will take weeks to get all the wrinkle iron out. 解决这些难题得要几周时间。
- Have you any scrap iron knocking about? 你那儿有散在各处的废铁吗?