Some new research outcomes of wolframite-tin-polymetallic metallization in the Huoi Chun area, Huaphanh province, Lao people’s democratic republic (LPDR)

Abstract

The paper focuses on clarifying the characteristics of tungsten, tin - polymetallic ore mineralization in the Huoi Chun area based on applying traditional geological methods, collecting documents, methods of studying ore material composition, and legal statistic. The findings are as follows: Mineral ores were generated mainly by material deposition, crystallization of hydrothermal solution, and filling fracture systems. The main minerals occurred in the study area are tungsten, tin, copper, zinc, bismuth. Tungsten, tin-polymetallic metallization was generated in 3 hydrothermal episodes. The symbiotic wolframite - bismuth mineral symbiosis is a discovery of the authors' collective during the implementation of the National project under Protocol code NDT.35.LA / 17. Sn, Cu, Pb, Zn, As, and Cd - bearing minerals are characterized for the middle episode of metallogeny; whereas W, Co, and Bi- bearing minerals were formed during the third episode of hydrothermal metallogeny. The tungsten, tin - polymetallic mineralization could be related to Mesozoic - Cenozoic intrusive magmatism.