▁F uj ian ▁has ▁two ▁vol can ic ▁rock ▁provinces . ▁ ▁The ▁East ▁F uj ian - T ai wan ▁ ▁vol can ic ▁rock ▁region ▁includes ▁a ▁strip ▁along ▁the ▁coast . ▁ ▁The ▁rest ▁of ▁the ▁province ▁falls ▁into ▁the ▁Z he ji ang - F uj ian - Gu and ong ▁vol can ic ▁rock ▁region . ▁ ▁Both ▁are ▁part ▁of ▁the ▁South ▁China ▁te ch ton o - mag m atic ▁province . ▁The ▁Z he ji ang - F uj ian - Gu and ong ▁vol can ic ▁rocks ▁are ▁mostly ▁r hy ol ite ▁and ▁d ac ite ▁rich ▁in ▁pot ass ium , ▁from ▁Late ▁Jur ass ic ▁to ▁Early ▁C ret ace ous . ▁ ▁The ▁mag mas ▁were ▁formed ▁in ▁an ▁environment ▁first ▁under ▁compression , ▁and ▁later ▁under ▁t ension . ▁The ▁East ▁F uj ian - T ai wan ▁ ▁vol can ic ▁rocks ▁in ▁F uj ian ▁formed ▁in ▁a ▁contin ental ▁sh elf ▁environment , ▁with ▁alk ali ▁bas alt ▁er upt ed ▁around ▁ 1 1 . 6 5 ▁Ma ▁on ▁the ▁coast ▁near ▁Fot an . ▁ ▁In tr us ives ▁N umer ous ▁gran it ic ▁intr us ions ▁took ▁place ▁along ▁with ▁the ▁vol cano es ▁in ▁the ▁Jur ass ic ▁and ▁C ret ace ous . ▁ ▁Min er als ▁A ▁number ▁of ▁min er als ▁were ▁discovered ▁in ▁F uj ian ▁or ▁have ▁their ▁type ▁locations ▁there . ▁ ▁Nan ping ite