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ALH84001 Curation History
Marilyn Lindstrom, PhD, NASA/JSC/SN2
| Curation Specimens | ||
 | Initial Weight - 1,931 g | |
| MPL Weight | |
 | Bulk Samples - 1,527 g | |
| 12 Potted Butts - 17.5 g | |
| 2 Library Thin Sections - JSC and Smithsonian | |
| Display Sample at Smithsonian, 212 g | |
| | ||
| Research Specimens | ||
| Research Specimens - 47 Investigators | |
| 30 Thin Sections - 16 Investigators | |
| 103 Chips - 39 Investigators | |
| Large research allocations | |
| 4 Investigators >10 g | |
| 10 Investigators 5-10 g | |
| Inventory Letter to Investigators | |
| Most PI's replied that they would keep samples or had consumed them. | |
| Some PI's are returning samples. | |
| | ||
| Availability of Carbonates | ||
| Examined 2 big pieces and 15 chips/fines samples > 10 g | |
| Detailed survey shows 1% scattered through rock | |
| Occur in diffuse and globular habits, both have PAH's | |
| | ||
| Curation | ||
| Past Processing (1985-1993) | |
| Initial processing and large pieces in N2 cabinet | |
| Small pieces processed on flow bench, sealed in air | |
| All pieces stored in N2 cabinet | |
| Band sawed in 1993 for consortium | |
| Past Processing (1994-1996) | |
| Sealed and stored in N2 cabinet | |
| Special handling for organic analyses | |
| Large and small pieces processed on flow bench | |
| Current Processing of ALH84001 | |
| Large pieces processed only in cabinet | |
| Small pieces processed on flow bench, sealed in cabinet | |
| Special handling for organic analyses | |
| Current Achondrite Processing | |
| Process large & small pieces on flow bench | |
| Seal & store in N2 cabinet | |
| Use only clean, approved materials (stainless steel, aluminum, teflon, poly vials, nylon bags) | |
| | ||
| Possible Sources of Organic Contamination in MPL | ||
| Xylan lubricant - removed in 1990 | |
| Sample containers - vials and nylon bags | |
| Cleaning procedures - ultrapure water, alchohol wipes | |
| Gloves - neoprene and ployethylene | |
| Proximity to humans at flow bench | |
| | ||
| Steps to Avoid Organic Contamination | ||
| Designate cabinet for martian meteorites only and do special cleaning | |
| Test all sources of organic contamination (several are in-work) | |
| Prepare samples for organic analyses without plastics | |
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