二迭系 meaning in Chinese
dyas
Examples
- ( 8 ) suggesting the deposit information in central south part of xingan - mongolia orogenic belt relate to the two events of mantle upwell and lithosphere extension since late - paleozoic . first is the lithosphere de
在这些中酸型小岩体与早二迭系地层的内外接触带往往形成eu 、 pb 、 zn 、 sn 、 ag 、 au等多金属矿床和矿化密集区。 - The jinan spring catchment is a complicated karst water system , the following major work had been done in order to discuss the proplem of spring protection and water supply . 1 . having conduced exploration , experiment and comprehensive research , the southern boundary of the jinan spring catchment is determined to be the surface water divide ( changecheng mountain ) , the source of yufu river and baedasha river ; the northern one is the carbonniferous and permian strata , together with the igneous rock mass in the north of jinan , and the eastern and the western ones are dongwu and mashan faults respectively , which are weakly permeable boundaries . the total area of the spring catchment is 1486 km2
济南泉域为一复杂的岩溶水系统，为了探讨保泉供水问题，主要做了以下工作： (一)经过勘查、试验和综合研究确定济南泉域边界是：南边界为玉符河、北大沙河源头的地表水分水岭(即长城岭) ；北边界为济南北部的石炭、二迭系煤系地层和岩浆岩体；东、西两侧分别以弱透水的济南东部的东坞断裂和西部的马山断裂为边界。