Meeting 22: 5 June 2019
Meeting Minutes
Date: 5 June 2019; 1030 – 1200 CT; IODP A105
Attendees: Gary Acton, Peter Blum, Laurel Childress, Lisa Crowder, Emily Estes, Tobias Hofig, David Houpt, Brad Julson, Denise Kulhanek, Brian LeVay, Leah LeVay, Amy McWilliams, Eric Moorgat, Algie Morgan, Vinny Percuoco, Katerina Petronotis, Don Simms, Trevor Williams [by Zoom: Ty Cobb, Ann Dunlea, Jeff Ryan, Johanna Suhonen]
New Items:
1) XRD replacement (Gary/TAS)
TAS has been looking at replacements to the Bruker D4 ENDEAVOR XRD
· Current risk is that there is no backup on the ship and repair/replacement could take several months. The current instrument is also nearing the end of vendor support. There have also been breakdowns on multiple expeditions in the past year.
· Vendors investigated: Bruker, Malvern Panalytic, and Rigaku
· A presentation summarizing products of each vendor available on the LWG website
· Preferred option by TAS is Malvern Panalytic AERIS Benchtop
o Sample preparation is the limiting time factor, but similar for all instruments
o Software (Xpert) has more functionality than Bruker’s Eva software, and it can also read legacy data from the Bruker format
Recommendation:The lab working group supports the addition of a Malvern Panalytic AERIS Benchtop unit, to serve as a backup and potential replacement to the Bruker D4.
2) Liquid sampling tool capture and reporting (Peter)
Plans to sample borehole water with potentially three different tools on Expedition 385T led to a discussion on how we register shipboard analyses of interstitial and borehole water obtained with different tools, and how we report the tool information in LORE. A presentation summarizing these proposals is available on the LWG website.
· Proposal 1:Add each downhole tool specifically to the sampling tools list, such as WSTP, KUSTER (we are purchasing two), and whatever we end up calling Geoff Wheat’s new shape memory alloy triggered water sampler on 385T.
o Borehole water sampling tools were previously all labeled as [OTHER]
LWG Recommendation:Add downhole tool names as options in the sampling tools list as suggested.
· Proposal 2:The sampling tool is reported in the expanded LORE reports of the “Interstitial Water (IW)” group of reports. It is not reported in the standard report.
LWG Recommendation:Implement the sampling tool column in the standard report, following evaluation of its existing draft implementation in the test database (timeline: June 21). Additionally, implement the sampling tool column in the Sample Report (proposed by David Houpt).
· Proposal 3A:Change the LORE report name from “Interstitial Water (IW)” to “Liquid phase analyses” since liquid analyses are made on IWs as well as on borehole fluids (and perhaps even water column samples in the future).
LWG Recommendation:Based on a lengthy discussion, the LWG consensus is to create a separate report for borehole water data (modification of Proposal 3A). The Borehole Water Report would mirror the current IW Report, minus the Sample Identity and CSF-B columns. The depth would be reported in drilling depth below seafloor, instead of CSF-A.
· Proposals 3B & 3C:Replace “Gas Elements” with “Gas phase analyses” and replace the group name “ICP-AES Solids” with “Solid phase analyses” and list the specific expanded and standard reports underneath, analogous to the liquid (IW and Borehole) analyses.
LWG Recommendation:Revisit the renaming of geochemistry reports and groupings following implementation of Proposals 1, 2, and 3A. Proposals 3B and 3C are lower priority.
· Proposal 4:Spell out the full analysis name/description in the “about” window.
o In some geochemistry reports the analysis name is not spelled out in the “About this report” page.
LWG Recommendation:Revisit the “About this report” pages and spell out the analysis names where needed.
· Proposal 5:Fix the depth routines to honor sample parentage of all liquid samples.
LWG Recommendation:To be addressed in Proposal 3A Borehole Water Report. Developers should investigate and report on the feasibility to report bottom depth for IW and Borehole water samples (timeline: June 21).