orthophyre

基本解释

The metallogenetic geologilcal condition of the orthophyre contact zone in YanJia during the Ximalaya period is analysed in this paper.
通过对喜山期岩甲正长斑岩接触带成矿地质条件进行的分析,认为岩甲正长斑岩的接触带及其旁侧构造裂隙系统具备形成金矿的有利条件。
Keywords gold depesit;the metallogenetic geologilcal condition;orthophyre;YanJia;
金矿床;成矿地质条件;正长斑岩;岩甲;
main water conveyance tunnel of Dahuofang reservoir is 85.4Km long and threads through Archaeozoic compositing gneiss, Paleozoic quartzite and marble, Mesozoic volcano,lava,volcanic breccia,tuff , sand-shale stone and Yanshan period orthophyre.
大伙房水库输水工程隧道主洞线长85.;4km;穿越的地层有太古界混合片麻岩; 元古界石英岩、大理岩;