| 1 | Hydrothermal sedimentary silicalite studies are important for ore deposits. | |
| 2 | The Jiabula Formation consists of a group of black shales with intercalations of sandstone and sandy limestone. | |
| 3 | Formation dip is large, caverns develop much, fractures crisscross each other, part with metasomatism of kiesel and carbonate. | |
| 4 | The siliceous rock zone in Yantong mountain area, central Jilin Province, is the key region for studying the paleo-Asian ocean tectonic evolution. | |
| 5 | Our country is very rich in silica raw material, but the comprehensive utilization of resource is not so good, causing unnecessary waste. |
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