变质区 meaning in Chinese

affect zone

Heat - affectred zone
受热变质区
The long - term overlooking of the organic matter metamorphism as one of important factors in hydrocarbon reservoir preservation condition and not taking it into consideration in the petroliferous prospect assessment system would be the major masons
用这一方法研究表明，在川黔桂地区，定碳比小于90 %的有瘦煤及轻的煤变质区，可以发现气田。