鄂尔多斯盆地是我国重要的含油气沉积盆地之一，上古生界煤是盆地内上古生界天然气藏的主要的气源岩。

It is reported that the Upper Paleozoic coals are the major gas-source rocks in Ordosbasin, one of the most important oil-gas sedimentary basin in our country.

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湖南变质岩区的内生与外生金矿床均以高成色的单一自然金产出为特征。

Endogenic and exogenic gold deposits in metamorphic regions in Hunanare characterized by occurrence of high-percentage single natural gold.

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下古生界烃源岩在西部坡折带及南北隆起区现今仍处于有效生油窗内（镜质组反射率小于1.3 % ）。

Nowadays, at the western slope and the northern and southern uplifts the Lower Paleozoic source formations are still in the active oil generation Rold ( R o< 1.3%).

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