kerogen shale 中文意思是什麼
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In the whole city the proven mineral reserves are of 53 kinds, of which the kerogen shale is 5. 1 billion tons, kaolin over 0. 3 billion tons, ranking first in the country. rare earth and porphyrite tin are big mines on the country scale ; xinyi jade mine, reputed as " jade of the south " is one of the three big jade mines in the country
全市已查明礦藏53種，其中油母頁巖51億噸，高嶺土儲量3億多噸，均居全國首位；稀土、斑巖型錫礦屬全國大礦；被譽為「南方璧玉」的信宜玉石礦是全國三大玉石礦之一。
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