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The SHRIMP-RG is at Stanford University as a result of a partnership between the U.S. Geological Survey and Stanford School of Earth, Energy & Environmental Sciences. The laboratory has been jointly operational since 1998, supporting scientists and students from the USGS, Stanford, and external visitors from around the world who visit the laboratory to analyze specimens for a variety of scientific research objectives.

We are committed to making SHRIMP-RG available to the scientific community and seek projects that require spatially resolved measurements and benefit from SHRIMP-RG's unique combination of high secondary transmission and high mass resolving power.



The ion microprobe has been operational since 1998 and continues to provide high-resolution geochronology and geochemistry data to many researchers for a wide variety of investigations.

A new paper is now published in Geostandards and Geoanalytical Research, outlining methods for U-Th-Pb and trace element analyses in zircon using SHRIMP-RG. Also included are trace element concentrations for MADDER (now called MAD-559), as well as updated values for MAD-green, 91500, CZ3, and SL13 zircon standards. 

We provide an updated value for Ti for all these standards, based on robust isotope dilution ICP-MS measurements of 91500 by Szymanowski et al. (ChemGeol; 2018). We also include conversion factors to update previous trace elements concentrations to updated values presented here (see Supplemental Table 8).

Download the full paper here.

All U-Th-Pb and trace element data produced by SHRIMP-RG that has been reduced in SQUID-1 or SQUID-2 is now suitable for upload to This is important for data management, archiving, and optional release of data acquired during NSF-supported research. Please download the instructions for online submission here.

To request for instrument time on SHRIMP-RG, please click on the 'Request Form' on the banner or email for inquiries. Currently, we are scheduling 2 to 4 months in advance (updated Jan. 25, 2019).