Overview of magmatic-hydrothermal evolution of and rare element super enrichment in NYF pegmatites

doi:10.13745/j.esf.sf.2023.5.6

Abstract

Abstract:

NYF pegmatites as an important strategic mineral resource have not been widely studied. Compared to LCT pegmatites, NYF pegmatites have poor internal structural zonation and regional zonation but contain large amounts of Nb, Y, F and other rare minerals. The geochemical characteristics of columbite-/mica-group minerals and tourmaline can accurately reveal the magmatic-hydrothermal evolutionary process and reflect the degree of internal differentiation of NYF pegmatites; whereas volatile components such as F, B, P and H₂O not only affect the degree of internal differentiation of the pegmatites but also play a crucial role in the super enrichment of rare elements. The enrichment, migration and crystallization of rare elements take place through all stages of magmatic-hydrothermal evolution; and the mineralization of rare metals (Nb, Be, Rb, Zr, Th, U) and rare earths (Y, Ce, Sc, etc.) may occur in the highly evolved pegmatites. In future, alkaline rocks/granites should be key exploration targets for NYF pegmatites; and researches on NYF pegmatites should be strengthened to guide ore prospecting.

Key words: structural zonation, crystallization differentiation, magmatic-hydrothermal evolution process, origin of pegmatite, rare metal mineralization, rare-earth mineralization

CLC Number:

P57
P588.13

RAO Can, WANGWU Mengyu, WANG Qi, ZHANG Zhiqi, WU Runqiu. Overview of magmatic-hydrothermal evolution of and rare element super enrichment in NYF pegmatites[J]. Earth Science Frontiers, 2023, 30(5): 106-114.

Figures/Tables 4

References 64

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矿物种类	矿物名	晶体化学式
铌钽钨氧化物	铌铁矿	FeNb₂O₆
	铌锰矿	MnNb₂O₆
	钽铁矿	FeTa₂O₆
	钽锰矿	MnTa₂O₆
	重钽铁矿	FeTa₂O₆
	铌钨矿物	(Fe,Mn,Nb,W,Ta)₂O₄
	黑钨矿	FeWO₄
	白钨矿	CaWO₄
	细晶石	(Ca,Na)₂(Ta,Nb)₂O₆(O,OH,F)
铈矿物	独居石	CePO₄
	氟铈矿	CeF₃
	氟碳铈矿	CeCO₃F
	直氟碳钙铈矿	CaCe(CO₃)₂F
	铈易解石	Ce(Ti,Nb)₂O₆
钇矿物	磷钇矿	YPO₄
	褐钇铌矿	YNbO₄
	黑稀金矿	(Y,Ca,Ce,U,Th)(Ti,Nb,Ta)₂O₆
	钇易解石	Y(Ti,Nb)₂O₆
铍矿物	绿柱石	Be₃Al₂(SiO₃)₆
铍矿物	整柱石	Ca₂K(Be₂Al)Si₁₂O₃₀(H₂O)
钛矿物	金红石	TiO₂
钛矿物	钛铁矿	FeTiO₃
钍石-锆石	钍石	ThSiO₄
钍石-锆石	锆石	ZrSiO₄

矿物种类	矿物名	晶体化学式
铌钽钨氧化物	铌铁矿	FeNb₂O₆
	铌锰矿	MnNb₂O₆
	钽铁矿	FeTa₂O₆
	钽锰矿	MnTa₂O₆
	重钽铁矿	FeTa₂O₆
	铌钨矿物	(Fe,Mn,Nb,W,Ta)₂O₄
	黑钨矿	FeWO₄
	白钨矿	CaWO₄
	细晶石	(Ca,Na)₂(Ta,Nb)₂O₆(O,OH,F)
铈矿物	独居石	CePO₄
	氟铈矿	CeF₃
	氟碳铈矿	CeCO₃F
	直氟碳钙铈矿	CaCe(CO₃)₂F
	铈易解石	Ce(Ti,Nb)₂O₆
钇矿物	磷钇矿	YPO₄
	褐钇铌矿	YNbO₄
	黑稀金矿	(Y,Ca,Ce,U,Th)(Ti,Nb,Ta)₂O₆
	钇易解石	Y(Ti,Nb)₂O₆
铍矿物	绿柱石	Be₃Al₂(SiO₃)₆
铍矿物	整柱石	Ca₂K(Be₂Al)Si₁₂O₃₀(H₂O)
钛矿物	金红石	TiO₂
钛矿物	钛铁矿	FeTiO₃
钍石-锆石	钍石	ThSiO₄
钍石-锆石	锆石	ZrSiO₄