Guangzhou Institute of Geochemistry
Introduction:
1980: A mass spectrometer Micromass 1200 was imported and then the first Chinese Ar-Ar laboratory was established by Professor Tongmo Dai in Guiyang, SW China.
1988: Ar-Ar progressive crushing technique for dating fluid inclusions was established by Hua-Ning Qiu.
1990: The Micromass 1200 laboratory was removed to Guangzhou (Canton), South China.
2004: A new Ar-Ar laboratory, with a 5400Ar mass spectrometer, an MIR10-50W CO2 laser, a UP-213 UV ablation laser and a crushing apparatus, was established in Guangzhou by Dr. Hua-Ning Qiu.
Instrument: GV Instruments 5400Ar mass spectrometer
Ar-Ar dating techniques:
1. IR-laser stepwise heating: MIR10-50W CO2 laser (New Wave Research)
2. UV-laser microprobe: UP-213 ablation laser (New Wave Research)
3. Crushing in vacuo: Dating fluid inclusions of the K-poor minerals.
Prof. Dr. Huaning Qiu is the responsible scientist for the Ar-Ar laboratory.
Contract us:
Dr. Huaning Qiu
Ar-Ar Laboratory
Guangzhou Institute of Geochemistry
Chinese Academy of Sciences
P.O. BOX 1131
Guangzhou 510640
P.R. China
Mobile: +86-159-2082-0798 Tel: +86-20-3365 6389
E-mail: Huaning.Qiu@163.com
Fig. 1 MIR10-50W CO2 Laser Fig. 2 Laser heating monitored by computer
(Click above picture to display full size image)
(1) Mass spectrometer: GV Instruments® 5400Ar
Sensitivity: Multiplier: 1.64×10-15 mol/mV, High-Faraday: 1.19×10-15 mol/mV
Resolution: 450 - 470 Blank: 36Ar: 3×10-14 ccSTP (including purification line)
40Ar rising rate: 4.183×10-13 cc STP min-1 or 1.866×10-17mol/min-1 (including purification line)
(2) Laser: New Wave Research® MIR10-50W CO2 Laser
Laser heating is operated by New Wave Research® Software of Laser Ablation System.
(3) Purification Line: GV Instruments® Automated Purification Line with
One Varian Vacuum Technologies® StarCell® (20l/s)
Two Sorb-AC NP10 pumps made by SAES Advanced Technologies®
(4) Result shows: Ar-Ar Laser stepwise heating results of biotite from a granite
(Click above picture to display full size image)
(Click above picture to display full size image)
(Click above picture to display full size image)
2. UV-laser microprobe technique
New Wave UP-213 UV-Laser
Retrograde eclogite, Dabieshan
Photomicrograph under UV-Laser microprobe (Amp: amphibole rim)
Ar-Ar age spectra of Amphibole rims
3. Ar-Ar in vacuo crushing technique
Please refer to:
Qiu HN and Jiang YD. Sphalerite 40Ar/39Ar progressive crushing and stepwise heating techniques. Earth Planet. Sci. Lett., 2007. 256(1-2): 224-232. (DOI)
Crushing apparatus and 5400 mass spectrometer
Fluid inclusions within sphalerite samples from the Fankou Pb-Zn deposit
Sphalerite Ar-Ar isochrons from the Fankou Pb-Zn Deposit:
(Click above picture to display full size image)
(Click above picture to display full size image)
Publications of Hua-Ning QIU (Link)