Ann: High Grade Silver Discovered at Tivan's Sandover Project, page-74

Shrimp - cool instrument - Aussie invention.

Thesensitive high-resolution ion microprobe(alsosensitive high mass-resolution ion microprobeorSHRIMP) is a large-diameter, double-focusingsecondary ion mass spectrometer(SIMS)sector instrumentthat was produced by Australian Scientific Instruments inCanberra, Australiaand now has been taken over by Chinese company Dunyi Technology Development Co. (DTDC) in Beijing. Similar to the IMS 1270-1280-1300 large-geometry ion microprobes produced byCAMECA, Gennevilliers, France and like other SIMS instruments, the SHRIMPmicroprobebombards a sample under vacuum with a beam of primaryionsthatsputterssecondary ionsthat are focused, filtered, and measured according to their energy and mass.

The SHRIMP is primarily used for geological and geochemical applications. It can measure the isotopic and elemental abundances in minerals at a 10 to 30 μm-diameter scale and with a depth resolution of 1–5 μm. Thus, SIMS method is well-suited for the analysis of complex minerals, as often found inmetamorphicterrains, someigneous rocks, and for relatively rapid analysis of statistical valid sets of detrital minerals from sedimentary rocks. The most common application of the instrument is inuranium-thorium-leadgeochronology, although the SHRIMP can be used to measure some otherisotoperatio measurements (e.g., δ⁷Li or δ¹¹B^[1]) and trace element abundances.

SHRIMP instruments around the world[edit]

	Instrument number	Institution	Location	SHRIMP model	Year of commissioning
1	1	Australian National University	Canberra	I	1980 (retired 2011)
2	2	Australian National University	Canberra	II/mc	1992
3	3	Curtin University of Technology	Perth	II	1993 (moved to Uni Queensland 2022)
4	4	Geological Survey of Canada	Ottawa	II	1995
5	5	Hiroshima University	Hiroshima	IIe	1996
6	6	Australian National University	Canberra	RG	1998
7	7	USGSandStanford University	Stanford	RG	1998
8	8	National Institute of Polar Research	Tokyo	II	1999
9	9	Chinese Academy of Geological Sciences	Beijing	II	2001
10	10	All Russian Geological Research Institute	St. Petersburg	II/mc	2003
11	11	Curtin University of Technology	Perth	II/mc	2003
12	12	Geoscience Australia	Canberra	IIe	2008
13	13	Korea Basic Science Institute	Ochang	IIe/mc	2009
14	14	University of São Paulo	São Paulo	II/mc	2010
15	15	University of Granada	Granada	IIe/mc	2011
16	16	Australian National University	Canberra	SI/mc	2012
17	17	Chinese Academy of Geological Sciences	Beijing	IIe/mc	2013
18	18	National Institute of Advanced Industrial Science and Technology	Tsukuba	IIe/amc	2013
19	19	Polish Geological Institute- National Research Institute	Warsaw	IIe/mc	2014
20	20	National Institute of Polar Research	Tokyo	IIe/amc	2014
21	21	Shandong Institute of Geological Sciences	Jinan	V	2023