SUMMARY

Perfecting magmatic scale for Việt Nam according to plate tectonic concept

Bùi Minh Tâm, Trần Tuấn Anh, Lê Duy Bách, Nguyễn Trung Chí,
Chen Fukun, Trịnh Văn Long, Phạm Đức Lương, Nguyễn Linh Ngọc,
Trần Trọng Hoà, Trịnh Xuân Hoà, Vũ Như Hùng, Phạm Hồng Thanh,
Nguyễn Đức Thắng, Nguyễn Thị Bích Thuỷ, Trần Văn Toàn,
Trương Minh Toản, Nguyễn Đình Triệu, Nguyễn Hữu Tý

On the basis of detailed study on geostructural characteristics, substantial composition, distribution in space and time, origin and geodynamic media, magmatic formations in Việt Nam 33 magmatic associations have been divided according to 9 different tectonic settings: mid oceanic ridge (MOR), volcanic arc (VA), back-arc basin (BAB), syn-collision (Syn-COLL), continental rift (CR), continental flood basalt (CFB), anorogeny (AOR) and shear zone (SHZ).

Magmatic evolution in Việt Nam includes 7 stages of activity namely: Archean (AR), Paleo-Mesoproterozoic (PP-MP), Neoproterozoic - Early Cambrian (NP-ε₁), Early-Middle Paleozoic (PZ_1-2), Late Paleozoic - Early Mesozoic (PZ₃-MZ₁), Late Mesozoic - Early Kainozoic (MZ₃-KZ₁), and Late Kainozoic (KZ₂). Basically, these magmatic activity stages might correspond to “Wilson cycle” related to the opening-closing of oceanic basins and collision-consolidation of terranes and cratons through Grenville, Pan-African, Caledonian, Indosinian, Yanshan and Himalayan orogenic events.

Người biên tập: TSKH. Lê Duy Bách