| 1 | Before Later Proterozoic era, in this area more than two times of thermodynamic metamorphism took place. | |
| 2 | The data offered here favor that the collision between the Yangtze and Cathysia blocks happened in the late Proterozoic era. | |
| 3 | This metallogenic province is characterized by the Mid-Late Proterozoic and the Late Paleaozoic mineralizations. | |
| 4 | Boron deposits of eastern Liaoning occur in a suite of Early Proterozoic metamorphic rocks, with boron orebodies existent in magnesian marble. | |
| 5 | The Precambrian intrusive rocks in western Shandong area mainly fall into two parts:the Taishanian(Archean)and the Aolaishanian(early Proterozoic) intrusive rocks. |
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