The Last Update Time : ..
Professor of Geochronology
Head of the 40Ar/39Ar Geochronology Laboratory
School of Earth Resources, China University of Geosciences
Huaning Qiu completed his B.A. in Geology at the Central South University (Changsha), M.S. in Geochemistry at the Institute of Geochemistry (Guiyang), Chinese Academy of Sciences (CAS), PhD in Geochemistry at Guangzhou Institute of Geochemistry, CAS.
Huaning Qiu visited and studied at the 40Ar/39Ar Geochronology Laboratory, Vrije Universiteit (VU University) Amsterdam from February 2000 to May 2001. Together with Prof. J.R. Wijbrans, Huaning completed two KNAW-CAS international collaboration research projects from 2002 to 2010 and a jointly funded CAS-KNAW PhD Training Programme from 2009 to 2015.
MAP-215-50, Vrije Universiteit Amsterdam
My reseach efforts are focused on the 40Ar/39Ar dating techniques and applications, especially in fluid inclusions 40Ar/39Ar progressive crushing. Including:
 Geofluid 40Ar/39Ar dating
 Ore-forming ages
 Oil/gas accumulation ages
 Young volcanic rocks
 Tectonics activities
Bai X.J., Hu R.G., Jiang Y.D., Liu X., Tang B. & Qiu H.N.*, 2019. Refined insight into 40Ar/39Ar progressive crushing technique from K–Cl–Ar correlations in fluid inclusions. Chemical Geology, 515: 37‒49. https://doi.org/10.1016/j.chemgeo.2019.03.037.
Xiao M., Qiu H.N.*, Jiang Y.D.*, Cai Y., Bai X.J., Zhang W.F., Liu M. & Qin C.J., 2019. Gas release systematics of mineral-hosted fluid inclusions during stepwise crushing: implications for 40Ar/39Ar geochronology of hydrothermal fluids. Geochimica Et Cosmochimica Acta, 251: 36‒55. https://doi.org/10.1016/j.gca.2019.02.016
Bai X.J., Jiang Y.D., Hu R.G., Gu X.P. & Qiu H.N.*, 2018, Revealing mineralization and subsequent hydrothermal events: Insights from 40Ar/39Ar isochron and novel gas mixing lines of hydrothermal quartzs by progressive crushing: Chemical Geology, 483: 332‒341. https://doi.org/10.1016/j.chemgeo.2018.02.039.
Bai X.J., Wang M., Jiang Y.D. & Qiu H.N.*, 2013, Direct dating of tin-tungsten mineralization of the Piaotang tungsten deposit, South China, by 40Ar/39Ar progressive crushing: Geochimica et Cosmochimica Acta, 114: 1‒12, https://doi.org/10.1016/j.gca.2013.03.022.
Jiang Y.D., Qiu H.N.* & Xu Y.G., 2012, Hydrothermal fluids, argon isotopes and mineralization ages of the Fankou Pb-Zn deposit in south China: Insights from sphalerite 40Ar/39Ar progressive crushing: Geochimica et Cosmochimica Acta, 84: 369‒379, https://doi.org/10.1016/j.gca.2012.01.044.
Qiu H.N.*, Wu H.Y., Yun J.B., Feng Z.H., Xu Y.G., Mei L.F. & Wijbrans J.R., 2011, High-precision 40Ar/39Ar age of the gas emplacement into the Songliao Basin: Geology, 39: 451‒454, https://doi.org/10.1130/g31885.1.
Qiu H.N.*, Wijbrans J.R., Brouwer F.M., Yun J.B., Zhao L.H. & Xu Y.G., 2010, Amphibolite facies retrograde metamorphism of the Zhujiachong eclogite, SE Dabieshan: 40Ar/39Ar age constraints from argon extraction using UV-laser microprobe, in vacuo crushing and stepwise heating: Journal of Metamorphic Geology, 28: 477‒487, https://doi.org/10.1111/j.1525-1314.2010.00875.x.
Yun J.B., Shi H.S., Zhu J.Z., Zhao L.H. & Qiu H.N.*, 2010, Dating petroleum emplacement by illite 40Ar/39Ar laser stepwise heating: AAPG Bulletin, 94: 759‒771, https://doi.org/10.1306/10210909102.
Qiu H.N.* & Wijbrans J.R., 2008, The Paleozoic metamorphic history of the Central Orogenic Belt of China from40Ar/39Ar geochronology of eclogite garnet fluid inclusions: Earth and Planetary Science Letters, 268: 501‒514, https://doi.org/10.1016/j.epsl.2008.01.042.
Qiu H.N.* & Jiang Y.D., 2007, Sphalerite 40Ar/39Ar progressive crushing and stepwise heating techniques: Earth and Planetary Science Letters, 256: 224‒232, https://doi.org/10.1016/j.epsl.2007.01.028.
Qiu H.N.* & Wijbrans J.R., 2006, Paleozoic ages and excess 40Ar in garnets from the Bixiling eclogite in Dabieshan, China: New insights from 40Ar/39Ar dating by stepwise crushing: Geochimica et Cosmochimica Acta, 70: 2354‒2370, https://doi.org/10.1016/j.gca.2005.11.030.
邱华宁 & 彭良, 1997, 40Ar–39Ar年代学与流体包裹体定年: 合肥, 中国科学技术大学出版社, 242 p.
Qiu H.N., 1996, 40Ar–39Ar dating of the quartz samples from two mineral deposits in western Yunnan (SW China) by crushing in vacuum: Chemical Geology, 127: 211‒222, https://doi.org/10.1016/0009-2541(95)00093-3.
Instrument: Thermo Scientifc multicollector ARGUS VI noble gas mass spectrometer
Detectors: 5 Faraday cups and 1 CDD electron multiplier
Amplifiers: H2 - 1011 Ω; H1 - 1012 Ω; Ax, L1 & L2 - 1013 Ω
Fully automatic 40Ar/39Ar Geochronology Laboratory at the China University of Geosciences (Wuhan)
One of the 40Ar/39Ar laboratories engaged in International EARTHTIME working group activities
40Ar/39Ar dating techniques
 Geofluid 40Ar/39Ar progressive crushing
 Petroleum 40Ar/39Ar dating
 Fully automatic 40Ar/39Ar laser stepwise heating
Homemade peripheral facilities and Experimental techniques
Sample Chamber & viewport
Homemade double-vacuum sample chamber and CO2 laser, 2018
Homemade double-vacuum sample chamber with viewport Φ62mm, 2018
Homemade single-vacuum sample chamber with viewport Φ62mm, mounted on a 4.5" CF flange
2005: viewport Φ28mm mounted on a 2.75" CF flange, in Guangzhou
2006: viewport Φ50mm mounted on a 4.5" CF flange, in Guangzhou
2014: viewport Φ62mm mounted on a 4.5" CF flange, in Wuhan
2018 new CO2 laser
The sample chambers are fixed and the laser are moving as a whole, which make the prep system better without flexible bellows.
Two micromotors make the laser moving in X-Y for 100 mm.
CCD image showing laser heating.
Laser software responses to the Thermo Qtegra to heat sample automatically based on the schedule.
U-shaped cryotrap of liquid nitrogen refrigeration, temperature-controlled through double thermocouples, playing
an important role in purification of noble gases. The temperature is usually set at –60 to –120°C (CUG, 2015).
Automatic crusher, to crush the grain sizes as uniformly as possible
Crusher tube, Pestle & Magnetic tool
Using a magnetic tool to move the pestle into/out of the tube. The non-magnetic sleeve makes it easy to remove the magnetic mineral powder.
Adjustable timer relayes, controlling the crushing frequencies of pestle drops and horizontal hits (Qiu & Jiang, 2007 EPSL)
Development history of crushing apparatus
Guiyang 1988: The crushing experiments were carried out by loading the samples and pestles into the (two) crushing tube chambers of an apparatus made of stainless steel and connected with the instrument, in which grains were crushed by repeatedly lifting and dropping the pestles using an external electromagnet. The pestles, made of pure iron and stainless steel (420 g), dropped samples through a height of 10–15 cm. The number of droppings in 1 min could be up to more than 100. (Qiu, 1996)
Amsterdam 2000: The crushing experiments were carried out in an inhouse designed crushing apparatus which was connected to the extraction line. The crusher consists of a 40 cm long, 4 cm diameter Inconel tube. The tube has spherical curvature on the inside base. The base is made of a 10 cm long — 4 cm diameter solid rod of Inconel that was welded to the tube. Crushing is achieved by moving a magnet steel dead-weight, with a machined spherical curvature on the one end, grooves on the side and a threaded nipple on the top end (for easy removal). The curvature on the dead-weight is of slightly smaller radius when compared to that of the crusher base, allowing concentration of powder near the tube central axis during crushing. Prior to analysis, blanks were reduced by heating the whole apparatus to 150°C using heating tape and the sample tube to 300°C using a furnace for ca. 12 h. The samples were crushed by repeatedly lifting and dropping the pestle using an external electromagnet with a frequency of one time per second (1 Hz) controlled by an adjustable power supply and pulse generator. The pestle was dropped from a height of 3 to 5 cm. As it was found that the gas yield decreased during the experiment, the number of the pestle movements for each successive extraction step was increased to maintain the argon concentration levels high enough for measurement. (Qiu & Wijbrans, 2006 GCA)
Guangzhou 2005: The crushing experiments were carried out in an inhouse designed crushing apparatus which was connected to the extraction line. The crusher is made of a new type of high-temperature (up to 1200°C) stainless steel tube of 210 mm in length and 28 mm in bore diameter. The tube has a spherical curvature on the inside base. The curvature on the dead-weight pestle is of slightly smaller radius than that of the crusher base, allowing concentration of powder to form near the tube central axis during crushing. Samples were crushed by repeatedly lifting and dropping the pestle using an external electromagnet respectively. Prior to analysis, blanks were reduced by heating the whole apparatus to 150°C using heating tape, and the sample tube was heated to 170°C using a furnace for ca. 10 h. The samples were crushed by repeatedly lifting and dropping the pestle using an external electric magnet with a frequency of 2.5 Hz controlled by an adjustable repeating-timer-relay. The pestle was dropped from a height of 3–5 cm. The pestle drop number of each step is recorded on a digital counter. (Qiu & Jiang, 2007 EPSL)
Guangzhou 2006: The improved crusher is made of a type 316L stainless steel tube (170 mm long × 28 mm inner diameter) with a spherical curvature on the internal base. The pestle is made of magnetic 3Cr13 type stainless steel (or S42030), of 218 g. This new crusher is much smaller in diameter and length than the crusher tubes used previously in Amsterdam and Guangzhou. (Qiu et al., 2011 Geology)
Wuhan 2014: Tube 160mm Φ28, Pestle 214g
Preparation of quartz samples by crushing:
● Cutting quartz vein and excluding other generations.
● Crushing and sieving for 30 ~ 40 meshes or 40 ~ 60 meshes.
● Washing with cleanwater and baking at 80 ~ 120 °C.
● Hand-picking mineral grains under a binocular microscope.
● Soaking in HNO3 for 30 min to remove carbonates and sulfides using an ultrasonic cleaner.
● Washing with cleanwater using an ultrasonic cleaner for more than three times.
● Baking at 80 ~ 120 °C.
Guangzhou Institute of Geochemistry CAS  70902  Doctoral Degree  Doctoral Degree in Science
Institute of Geochemistry CAS (Guiyang)  814  Postgraduate (Master's Degree)  Master's Degree
Central South University  814  Undergraduate (Bachelor's degree)  Bachelor's Degree
China University of Geosciences Chief Professor
Vrije Universiteit Amsterdam Co-Supervisor of PhD students
Vrije Universteit Amsterdam Visiting Scientist Collaboration with Dr. Jan Wijbrans and Dr. Fraukje Brouwer, completing two research projects supported by KNAW.
Vrije Universiteit Amsterdam Department of Isotope Geochemistry Visiting scientist
Guangzhou Institute of Geochemistry, CAS Assistant Professor; Associate Professor; Professor
270 Institute of Huadong Geological Survey Assistant Engineer
QQ Group of Ar-Ar dating :