摘要
The formation of the Mufushan granopegmahte was closey related to the Late Yenshanianmultiphase and multistage magmatic activities. More than one generation of beryl and aquamarineoccur in different types of pegmatite in the granitcs’ The presence of melt and melt-fluid inclusionsstrongly indhates a melt-solution character of the pegmatitic magma. Forming temperatures of the different generations of beryl in a Na +- K + -Ca2 + -CO3- -Cl- S4 - solution ranges fr0m 990℃ to200℃ touamarine was formed at 720- 180℃ The contents of alkali metals (Na+ + K+ ) in theore-formming solution of aquamarine are lower than those in the bery, but the contents of alkaliearths （Ca) and salinity are higher. The granite was generated by remlting of the basement formation (meta-sedimentary rocks of the Lengiiaki Group) which also served as the souree of ore-formingmaterial. Beryllium in the pegtnatite was transpbrted tnainly in the form of Na2[Be(CO3)2], withpart of it being complexed with Cl- and SO4 During the generation and evolution of thepegmatite, equilibrium might have been reached in the solid-melt-fluid or solid-fluid system. Theintergranular solutions may have reacted with the early crystallized minerals resulting in pot-ash-feldspartiation, albitization and muscovitisation during which the ore-forming elements were mobilized and transported in favour of ore deposition.
The formation of the Mufushan granopegmahte was closey related to the Late Yenshanianmultiphase and multistage magmatic activities. More than one generation of beryl and aquamarineoccur in different types of pegmatite in the granitcs' The presence of melt and melt-fluid inclusionsstrongly indhates a melt-solution character of the pegmatitic magma. Forming temperatures of the different generations of beryl in a Na +- K + -Ca2 + -CO3- -Cl- S4 - solution ranges fr0m 990℃ to200℃ touamarine was formed at 720- 180℃ The contents of alkali metals (Na+ + K+ ) in theore-formming solution of aquamarine are lower than those in the bery, but the contents of alkaliearths （Ca) and salinity are higher. The granite was generated by remlting of the basement formation (meta-sedimentary rocks of the Lengiiaki Group) which also served as the souree of ore-formingmaterial. Beryllium in the pegtnatite was transpbrted tnainly in the form of Na2[Be(CO3)2], withpart of it being complexed with Cl- and SO4 During the generation and evolution of thepegmatite, equilibrium might have been reached in the solid-melt-fluid or solid-fluid system. Theintergranular solutions may have reacted with the early crystallized minerals resulting in pot-ash-feldspartiation, albitization and muscovitisation during which the ore-forming elements were mobilized and transported in favour of ore deposition.
