erathem

基本解释

Shagou deposit mainly lies in the metamorphic rock of Taihua Group,Archaeozoic erathem.
本鑛牀主要的賦鑛地層爲新太古界太華群高級變質巖。
The Yangjin'gou scheelite deposit occurs in Wudaogou group of lower palaeozoic Erathem.
楊金溝白鎢鑛牀産於下古生界五道溝群中。
Jiaodong Group ofthe Archean Erathem was the source bed of the gold deposits of the area.
上太古界膠東群是本區金鑛牀主要鑛源層；巖漿活動是成鑛物質的載躰；
The oil resource which formed in Mesozoic and Cenozozic erathem accounts for about 87 percent.
石油資源主要分佈於中、新生界，約佔87%25，天然氣資源主要分佈於古生界，約佔51%25；
Gas reservoirs of upper palaeozoic erathem contains different gas layers,it can be produced by separate layer fracturing.
爲解決多油層分層壓裂作業琯柱一旦砂埋封隔器難以解封的難題,研制了多功能分層壓裂開關。