Porewater Geochemistry: SO4 
   Cruise AT37-06, Guaymas Basin 
  PI: Andreas Teske (UNC Chapel Hill) 
  Version: 07 December 2017 
  NOTES:  
   Sample_IDs "D7A_10X_CKS" are internal quality control standards (15.5 mg/L) 
   Sample_IDs "DI_SPK" are external quality control standards (20.0 mg/L)