Table 2
Geodynamic settings.
| No | Time period | Tectonic setting | Characteristic assemblages |
|---|---|---|---|
| 1 | Paleoproterozoic | Unknown | Gneiss, amphibolite, crystallized schists |
| 2 | Cambrian | Passive continental margin | Quartzite, quartz-sericite schist, greenschist |
| 3 | Silurian | Active margin subduction | (Hornblende-biotite gneiss-granodiorite, gneiss-diorite) |
| 4 | Devonian | Plate collision | Gneissoid two-mica granite, biotite granite |
| 5 | Late Paleozoic | Active continental margin | (Diorite, granodiorite, granite) |
| 6 | Early–Middle Triassic | Plate collision | Biotite granite, two-mica granite |
| 7 | Middle Triassic | Post-collision rifting | Dacite, rhyolite, tuff; granite, granosyenite |
| 8 | Early–Middle Jurassic | Post-collision intraplate basin | Sandstone, siltstone, argillaceous limestone |
| 9 | Cretaceous | Active continental margin subduction | Dacite, rhyolite; granitoid, granite |
| 10 | Late Cretaceous | Rifting of the upper and magmatic back arc | Dacite, felsite, rhyolite, andesite, tuff; biotite granite, two-mica granite |
| 11 | Middle Eocene–Oligocene | Rifting or pull-apart basin | Conglomerate, silty sandstone, silty sandstone, oil-bearing shale |
| 12 | early–middle Miocene | Thermal subsidence or post-rifting | Conglomerate, gravestone, gritstone, sandstone, siltstone, claystone |
| 13 | Late Miocene–Quaternary | Flood basalt and block doming mixed with inversion, strike-slip faulting, or tectonic extrusion | Tholeiitic basalt, sub alkaline, basalt, andesite-basalt, marine sediment |
| 14 | Pliocene–Quaternary | East Vietnam continental shelf | Fluvial-proluvial, fluvial sediments, pebbles, boulders, fluvio-marine sediment, sand, silt, grey clay containing forams, red sand. |