The US Geological Survey is seeking sources for a microXRF geochemistry sensor to be integrated with an existing Geotek MSCL-XZ II core logging system. This is a market research notice for planning purposes only, not a solicitation for quotes or proposals. Responses must be submitted electronically by April 28, 2026, at 9:00 AM PST. The applicable NAICS code is 334516, with a size standard of 1,000 employees. No budget amount or performance location is specified.