天然气水合物的地震识别标志对海洋天然气水合物勘探和研究具有十分重要的意义。
To distinguish the seismic evidence of gas hydrates in seismic reflection sections is very significant for the primary exploration and researches on marine gas hydrates.
上个世纪70年代文留煤型油气田的发现，标志着华北上古生界油气田勘探进入了一个新阶段。
In 1970s, the discovery of Wenliu coal-formed field marked a new period of Neopaleozoic field exploration in North China.
本文总结了区内锰矿成矿地质条件、分布特征、成矿规律、找矿标志及地质勘探工作程度，并提出了下步地质勘查工作建议。
The geologic terms, distribution feature, metallogenic laws and marks of the prospecting are summed up, and geologic survey is put forward for next step.
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