JEOL Probe Users Listserver Moderator: Ellery Frahm, [log in to unmask], Electron Microprobe Lab, University of Minnesota Post a message: send your message to [log in to unmask] Unsubscribe: send "SIGNOFF PROBEUSERS" to [log in to unmask] On-line help and FAQ: http://probelab.geo.umn.edu/listserver.html * I have some 11 year old probe data. Seven grains were analyzed (4 spots each) and the results ranged from 170 to 190 ppm CoO. I suspect that Co metal was used as a standard. I doubt that I can find the operating conditions. John A. R. Stirling Geological Survey of Canada Mineralogy Section 601 Booth Street, Room 761 Ottawa, Ontario CANADA K1A 0E8 Ph 613-943-0270 -----Original Message----- From: JEOL-Focused Probe Users List [mailto:[log in to unmask]] On Behalf Of Ellery Frahm Sent: May 25, 2010 20:18 To: [log in to unmask] Subject: [PROBE-USERS] Co in olivines JEOL Probe Users Listserver Moderator: Ellery Frahm, [log in to unmask], Electron Microprobe Lab, University of Minnesota Post a message: send your message to [log in to unmask] Unsubscribe: send "SIGNOFF PROBEUSERS" to [log in to unmask] On-line help and FAQ: http://probelab.geo.umn.edu/listserver.html * Probe folks, Does anyone know of published (or even unpublished) values for cobalt in San Carlos, AZ olivine? How about Harrat al Kishb, Saudi Arabia forsterite? Both concentrations should be in low three-digit ppm range. I'd like to know because I'm trying to check our accuracy at measuring Co in olivine at such a level. Thanks, Ellery ----------------- Ellery Frahm Senior Research Fellow, Department of Geology & Geophysics Manager & Principal Analyst, Electron Microprobe Lab Doctoral Candidate, Department of Anthropology University of Minnesota - Twin Cities campus Lab website: http://probelab.geo.umn.edu/ Personal: http://web.mac.com/elleryfrahm/