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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。
- Keywords gold deposit;alkali feldspar;K feldspar;alteration;Hebei; 金矿;碱性长石;钾长石;蚀变作用;河北;
- 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。
- Of, relating to, or containing feldspar. 长石的属于、关于或含长石的
- Another basic quantity is the bulk modulus K. 另一个基本的量是体积模量K。
- A varietyof diorite consisting chiefly of feldspar. 斜长岩主要含有长石的各种闪长岩。
- The authigenic illite in the sandstone reservoir was only formed in the diagenetic phase with mobile K??rich pore water. 砂岩储集层中自生伊利石仅在流动的富钾孔隙水介质环境下才能形成，烃类流体注入储集层后自生伊利石形成便会中止；
- Gold jewelry bears a number and the letter K. 金制的珠宝与一个数字和字母k有关。
- It is a diamond one inlaid with 18 K gold. 这是一枚镶有18K金的钻石戒指。
- A dark igneous porphyry embedded with feldspar crystals. 暗玢岩嵌有长石晶体的黑色火成斑岩
- It is a diamond finger ring inlaid with 18 K gold. 这是一枚镶有18K金的钻石戒指。
- A variety of feldspar valued as a gem for its pearly translucence. 月长石一种因为具有珍珠半透明的光泽而被视为宝石的长石
- Now he played out a,k,and j of heart. 现在他在接连打出红A、K和J。
- A variety of diorite consisting chiefly of feldspar. 斜长岩主要含有长石的各种闪长岩
- Now he's playing out A - K of heart. 现在他在接连打出红心A、K。
- Now he 's playing out A - K of heart . 现在他在接连打出红A、k和J。
- Be that the correct spelling of Z schedule k ? 这是"schedule"的正确拼法吗?
- As of Thursday, Feb 22, the M&K Factory is closed. 字面上理解，应该是说M&K的一家工厂在2月22日关闭了。
