The source rock correlation shows that Segment 1 of Nenjiang Member is the major source rock of Heidimiao Reservoir, and part of the oil originates from the formation below Yaojia Member.

通过油源对比， 确定嫩江组一段是黑帝庙油层主要的烃源岩， 部分原油来自姚家组以下地层。

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Until now, some studies showed that major source of ore-forming materials come from wall rock or upper mantle.

目前，有关研究认为此类矿床成矿物质主要来源于矿床的围岩或上地幔。

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The exploration practice indicated, the Songorine Basin discovered the major part oil gas originates to the depth portion permian is the hydrocarbon source rock.

勘探实践表明，准噶尔盆地发现的绝大部分油气来源于深部二叠系烃源岩。

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At the same time Yury Boiko, the Ukrainian energy minister, has high hopes that shale gas -- formed deep underground within large shale rock formations -- could also be a major alternative source of power in the decades to come.

CNN: STORY HIGHLIGHTS