Tourmaline chemistry, boron, and strontium isotope systematics trace multiple melt–fluid–rock interaction stages in deeply subducted continental crust

Potential tourmaline reference materials for microbeam B and Sr isotopic analyses

“…[5][6][7][8][9][10] Since boron and strontium have high solubility and mobility in aqueous solutions and are incompatible in most magmatic systems, both isotope systems are powerful tools to investigate magma mixing, thermal uid activity and subduction zone processes. [11][12][13][14][15][16][17][18][19][20][21][22][23] Matrix-matched reference materials are necessary for precise microbeam B and Sr isotope measurements regardless of the analytical method. At present, reported tourmaline reference materials are relatively scarce, including IAEA B4, IMR RB1, IMR RB2, dravite (HS no.…”

“…5–10 Since boron and strontium have high solubility and mobility in aqueous solutions and are incompatible in most magmatic systems, both isotope systems are powerful tools to investigate magma mixing, thermal fluid activity and subduction zone processes. 11–23…”