Table 2.
Thin section identification of background rocks
| No. | Autonomous Prefecture | Origin/source | Rock texture | Rock structure | Identification name |
|---|---|---|---|---|---|
| 1. | Ganzi | Dege County | Granoblastic texture | Massive structure | Calcite quartzite |
| 2. | Ganzi | Baisong Township, Derong County | Aplitic texture | Massive structure | (Metamorphism) Fine powder crystal dolomite |
| 3. | Ganzi | Donggu Township, Danba County | Lepido granoblastic texture | Phyllitic structure | Calcite quartz sericite phyllite |
| 4. | Ganzi | Danba County | Medium fine-grained blastogranitic texture | Massive structure | Metamorphic medium-fine grained two-mica adamellite |
| 5. | Aba | Cao Deng Township, Maerkang City | Lepido granoblastic texture | Phyllitic structure | Staurolite-bearing felsic sericite phyllite |
| 6. | Aba | Cao Deng Township, Maerkang City | Lepido granoblastic texture | Phyllitic structure | Staurolite-bearing felsic sericite phyllite |
| 7. | Aba | Longerjia Township, Maerkang City | Anisomerous blastopsammitic texture | Oriented structure | Metamorphic sandstone |
| 8. | Aba | Maerkang City | Aleuritic anisomerous blastopsammitic texture | Oriented structure | Silty metamorphic sandstone |
| 9. | Aba | Baiwan Township, Maerkang City | Lepido granoblastic texture | Parallel grain structure | Sillimanite-bearing two-mica granulite |
| 10. | Aba | Muerzong Township, Maerkang City | Medium-grained blastogranitic texture | Massive structure | Metamorphic medium-grained two-mica adamellite |
| 11. | Aba | Maerkang City | Medium fine-grained blastopsammitic texture | Oriented structure | Metamorphic medium-fine grained lithic arkose |
| 12. | Aba | Fubian Township, Xiaojin County | Fine-grained blastopsammitic texture | Oriented structure | Calcareous metamorphic fine sandstone |
| 13. | Aba | Xiaojin County | Fine-grained blastopsammitic texture | Oriented structure | Calcareous metamorphic fine sandstone |
| 14. | Aba | Dusong Township, Jinchuan County | Lepido granoblastic texture | Massive structure | Biotite granulite |
| 15. | Aba | Shili Township, Rangtang County | Aleuritic fine-grained blastopsammitic texture | Oriented structure | Silty-bearing metamorphic fine sandstone |
| 16. | Aba | Heishui County | Blastopsammitic texture | Platy structure | Metamorphic sandstone |
| 17. | Tibet | Jiangda County | Fine-grained granitic texture and breccia texture | Massive structure | Brecciated tonalite |