veinlet造句

• Undertaking isotopic geochronological study on ar - ar , adopted the fast - neutron activation dating technique to test 40ar - 39ar age of quartz from au - bering quartz veinlet ore in the deposit , and well - defined plateau age of 210 . 59 ma ? . 92 ma , the lowest apparent age of 208 . 07 ma ? . 22 ma , and isochron age of 207 . 14 ma ? 1 . 92 ma
  通过流体包裹体显微测温学研究，表明金矿床的均一温度成矿早阶段为270 320 ，成矿主阶段为170 250 ，成矿晚阶段为110 250 ，呈逐渐降低的趋势，低温成矿作用明显。