Yongxin Pan
Professor
Institute of Geology & Geophysics
Beijing 100029
Phone: 8299 8406 Fax: 6201 0846
E-mail: yxpan@mail.iggcas.ac.cn
Education
B.Sc., Geology, 1985, China University of Geosciences
M.Sc., Geology, 1988, China University of Geosciences
Ph.D., Geophysics, 1998, Institute of Geophysics, Chinese Academy of Sciences (CAS)
Professional Experience
1988-1995 Assistant Professor, Taiyuan University of Technology
1995-1988 Research Assistant, Paleomagnetism Lab, Institute of Geophysics, CAS
1998 Associate Professor, Institute of Geophysics, CAS
1999-2002 Associate Professor, Institute of Geology & Geophysics, CAS
2002 to present, Professor, Institute of Geology of Geophysics, CAS
Visiting Fellow, Geomagnetism Laboratory, Liverpool University, UK (2000-- 2001)
Visiting Fellow, Institute for Rock Magnetism, University of Minnesota, USA (July 2001)
Visiting Fellow, Institute of Geophysics, Munich University, Germany (2003--2004)
Awards & Fellowships
Young Scientist Award of CAS (1999)
The Royal Society Royal Fellowship, UK (2000)
Honorary Fellow, Dept of Earth Sciences, Liverpool University, UK (2000)
Visiting Fellowship, Institute for Rock Magnetism (IRM), University of Minnesota, USA (2001)
Fuchengyi Award for Young Scholar, Chinese Geophysical Union (2002)
Alexander von Humboldt Foundation Research Fellowship, Germany (2003)
National Science Fund for Distinguished Young Scholar, National Natural Science Foundation of China (2003)
top1. Biogeomagnetism
Biogenic magnetites have been discovered in magnetotactic bacteria (MTB), insects, mollusk, fishes, birds and even human tissues; in some living organisms, are presumed as potential carriers of magnetoreceptor, by which, migrating birds, fishes and sea turtles could orientate and navigate in the Earth’s magnetic field during their long-distance migration. Magnetosomes in MTB are of great importance in understanding biomineralization and possible links between organisms and geomagnetic field. Fossil magnetosomes are ubiquitous in sediments and contribute to magnetic signals. Bacterial magnetites are of also great potential applications in modern biological and medical sciences. My current work focuses on the formation and magnetic properties of bacterial magnetite. We have an Bacteriodrome in Beijing lab that was donated by the Alexander von Humboldt Foundation (Germany). Besides, our biogeomagnetism lab in Beijing have three sets of well-controlled magnetic coils and a very nice magnetic shielded room (2*3*2 m) specialized for biological studies. My group is collaborating with Chinese biologists to investigate the effects of magnetic filed on animals and plants.
Micrographs of electron microscope observations on magnetic extracts from lake Chiemsee: a whole fossil cell of M. Bavaricum and magnetosomes; bullet-shaped magnetosomes; prismatic shape magnetosomes in short chain; needle-like iron oxyhydroxide grains (inorganic?).
2. Paleointensity of Earth's magnetic field
The strength of the Earth's magnetic field during the geological time is extremely important constrain for working mechanism of geodynamo. Currently Prof. Zhu and I work on paleointensity studies on Mesozoic and Cenozoic volcanic rocks in China, especially, the Cretaceous basalts erupted just prior to and during the Cretaceous Quite Zone (Cretaceous Normal Superchron, CNS). In addition, we are very interested in searching new sample selection criteria for Thellier type experiments in order to increase its success rate. I also work on sedimentary rocks for relative paleointensity determiantion from chinese loess and lake sediments.
3. Rock magnetism and its applications
The mineralogy and magnetic property of remanent carriers in sediments and rocks are fundamental knowledge for paleomagnetism, environmental magnetism, paleointensity investigations and so on. I am particularly interested in magnetic properties of siderrite, greigite and titanomagnetite. Besides, I also study rockmagnetism of the ultrahigh pressure (UHP) metamorphic rocks in Dabieshan Orogenic belt.
2005
Pan YX, Zhu RX (2005) Rock magnetism and magnetic fabric studies of the ultrahigh-pressure (UHP) metamorphic rocks from the Dabie orogenic belt, east-central China: implications for retrograde metamorphism, Acta Petrlogica Snica, 21(4), 1101-1108.
Pan Y X, Petersen N, Winklhofer N, Davila A F, Liu D S, Frederichs T, Hanzlik M, Zhu R X (2005). Rock magnetic properties of uncultured magnetotactic bacteria, Earth Planet. Sci. Lett., 237, 311-325.
Pan Y.X, Nikolai Petersen, Alfonso F. Davila, Liming Zhang, Michael Winklhofer, Qingsong Liu, Marianne Hanzlik, and Rixiang Zhu (2005) The detection of bacterial magnetite in recent sediments of Lake Chiemsee (southern Germany), Earth Planet. Sci. Lett., 232, 109-123.
Pan Y.X., Mimi J. Hill, and Rixiang Zhu (2005) Paleomagnetic and paleointensity study of an Oligocene-Miocene lava sequence from the Hannuoba Basalts in northern China, Phys. Earth Planet. Inter. 151, 21-35.
Zhu R X, Liu Q S, Yao H T, Guo Z T, Deng C L, Pan Y X, Lu L Q, Chang Z G, Gao F.Magnetostratigraphic dating of hominoid-bearing sediments at Zhupeng, Yuanmou Basin, southwestern China, Earth Planet. Sci. Lett., 236. 559-568, 2005
Zhu R X, Pan Y X, Shi R P, Liu Q S, Li D M (2005) Palaeomagnetic and 40Ar/39Ar dating constraints on the age of the Jehol Biota and the duration of deposition of the Sihetun fossil-bearing lake sediments, northeastern China. Cretaceous Res., in press.
Liu Q S, Banerjee S K, Jackson M J, Deng C L, Pan Y X, Zhu R X (2005) Inter-profile correlation of the Chinese loess/paleosol sequences during Marine Oxygen Isotope Stage 5 and indications of pedogenesis. Quart. Sci., Rev. 24(1-2),195-210.
Liu Q S, Jackson M J, Banerjee S K, Maher B A, Deng C L, Pan Y X, Zhu R X. Mechanism of the magnetic susceptibility enhancements of the Chinese loess. J. Geophys. Res., 110, B12107, doi: 10.1029/2004JB003249, 2005.
Liu Q S, Yu Y, Deng C L, Pan Y X, Zhu R X. Enhancing weak magnetic fabrics using field-impressed anisotropy: application to the Chinese loess. Geophys. J. Int., 162, 381-389, 2005
2004
Zhu
R X, Potts R, Xie F, Hoffman K A, Deng C L, Shi C D, Pan
Y X, Wang H Q, Shi R P, Wang Y C, Shi G H, Wu N Q (2004) New evidence
regarding the earliest human presence at high northern latitudes in
northeast Asia. Nature,
431, 559-562.
Pan Y.X., Deng C.L., Liu Q.S., Petersen N., and R.X. Zhu (2004) Biomineralization and magnetism of bacterial magnetosomes, Chinese Sci. Bull, 49( 24), 2563-2568.
Pan Y.X., Hill M.J., Zhu R.X., and Shaw J. (2004) Further evidence for low paleointensity of the geomagnetic field during the early Cretaceous time: using the modified Shaw method and the microwave technique, Geophy. J. Int., 157, 553-564.
Zhu R X, Lo Ching-Hua, Shi R P, Pan Y X, Shi G H, Shao J A. (2004) Is there a precursor to the Cretaceous normal superchron? New paleointensity and age determination from Liaoning province, northeastern China. Phys. Earth Planet. Inter., 147, 117-126.
Zhu
R X, Lo Ching-Hua, Shi R P, Shi G H, Pan Y X,
Shao J A. (2004)
Palaeointensities determined from the middle Cretaceous basalt in Liaoning
province, northeastern China. Phys.
Earth Planet. Inter.,
142,
49–59
Zhu R X, Hoffman K A, Nomade S, Renne P R, Shi R P, Pan Y X, Shi G H. (2004) Geomagnetic paleointensity and direct age determination of the ISEA (M0r?) chron. Earth Planet. Sci. Lett., 217, 285-295.
Liu Q S, Banerjee S K, Jackson M J, Chen F, Pan Y X, Zhu R X. (2004) Determining the climatic boundary between the Chinese loess and palaeosol: evidence from aeolian coarse-grained magnetite. Geophys. J. Int., 156, 267–274.
Liu Q S, Banerjee S K, Jackson M J, Maher B A, Pan Y X, Zhu R X, Deng C L. Chen F H. (2004) Grain sizes of susceptibility and anhysteretic remanent magnetization carriers in Chinese loess/paleosol sequences. J. Geophys. Res., 109, B03101, doi:10.1029/2003JB002747.
Liu Q S, Banerjee S K, Jackson M J, Deng C L, Pan Y X, Zhu R X. (2004) New insights into partial oxidation model of magnetites and thermal alteration of magnetic mineralogy of the Chinese loess in air. Geophys. J. Int., 158, 506–514.
Shi R P, He H Y, Zhu R X, Pan Y X. (2004) ISEA reversed event in the Cretaceous Normal Super-chron (CNS): 40 Ar/39Ar dating and paleomagnetic resuldts.Chin. Sci. Bull., 49(9), 926-930.
2003
Pan
Y.X., Shaw J., Zhu R.X. and Hill M.J.(2003)
Reply to comment by Y. Yamamoto on "Experimental reassessment of the
Shaw paleointensity method using laboratory-induced thermal remanent
magnetization, J. Geophys. Res. 10.1029/2002JB002355, 108(B5),
2279, doi:10.1029/2002JB002355, 2003.
Liu
Q.S., Jackson M.J., Banerjee S.K., Zhu R.X., Pan Y.X.,
Chen F.H.(2003) Determination of magnetic carriers of the characteristic
remanent magnetization of Chinese loess by low-temperature demagnetization. Earth
Planet. Sci. Lett., 216(1-2),
175-186.
Zhu,
R.X., Hoffman K.A., Pan Y.X., Shi R.P. & Li
D.M.(2003) Evidence for weak geomagnetic field intensity prior to the
Cretaceous normal superchron, Phys. Earth Plent. Inter.,
136(3-4), 187-199.
Liu,
Q.S., Banerjee S.K., Jackson M.J., Chen F.H., Pan Y.X.,
and Zhu R.X.(2003) An integrated study of the grain-size-dependent magnetic
mineralogy of the Chinese loess/paleosol and its environmental significance,
J. Geophys. Res., 108(B9), 2437, doi:10.1029/2002JB002264.
2002
Pan
Y.X.,
Zhu R.X., Liu Q.S., and Jackson M.(2002) Low-temperature magnetic behavior
related to thermal alteration of siderite, Geophys. Res. Lett.,
29(23), 2087, doi:10.1029/2002GL016021.
Pan
Y.X.,
Zhu R.X., Liu Q.S., Guo B., Yue L.P., and Wu H.N. (2002) Plaeomagnetic
episodes over the past 1.2 Ma recorded in Chinese loess, Geophys.
Res. Lett., 29(8),
10.1029/2001GL014024.
Pan
Y.X.,
Shaw J., Zhu R.X. and Hill M.J.(2002) Experimental reassessment of the Shaw
palaeointensity method using laboratory-induced thermal remanent
magnetizations, J. Geophys. Res.
107(B7), 10.1029/2001JB000620.
Shi
R.P., Zhu R.X., Pan Y.X.,
Shi G.H., and Hoffman K.A.(2002)
Palaeointensity study of Early Miocene lavas from Pingzhuang, Inner
Mongolia, Chin, Geophys. Res. Lett., 29(21),2026,
doi:10.1029/2002GL015990.
Liu
Q.S., Banerjee S.K., Jackson M.J., Zhu R.X., and Pan
Y.X.(2002) A
new method in mineral magnetism for the separation of weak antiferromagnetic
signal from a strong ferrimagnetic background, Geophys. Res. Lett.,
29(12), 10.1029/2002GL014699.
Liu
Q.S., Banerjee S.K., Zhu R.X., and Pan Y.X.(2002)
Effects of low-temperature oxidation on the natural remanent
magnetization of the Chinese loess, Chinese Sci. Bull.,
47(24), 2100-2105.
Zhu
R X, Pan Y X, Shi R P (2002)
New Cretaceous palaeointensity data and the constraints on
geodynamics. Sci. China (D), 45 (10), 931-938.
Zhu R X, Shao J A, Pan Y X, Shi R P, Shi G H, Li D M. (2002) Paleomagnetic data from the Early Cretaceous volcanic rocks of West Liaoning: Evidence for intra-continental rotation. Chin Sci. Bull., 47(21), 1832-1837.
2001
Zhu,
R. X., K. A. Hoffman, R. Potts, C. L. Deng, Y.X.
Pan, B. Guo, Z.T. Guo, B. Y. Yuan, Y. M.
Hou & W. W. Huang
(2001)Earliest presence of
humans in northeast Asia,
Nature, 413, 413-417.
Pan
Y.X., Zhu R., Shaw J., Liu
Q. and Guo B. (2001)
Can relative palaeointensities be determined from the normalized
magnetisation of the wind-blown loess of China?
J. Geophys. Res., 106(B9), 19221-19232，2001
Pan Y.X., R.X. Zhu, J. Shaw, and Y.X. Zhou (2001) Magnetic Polarity Ages of the Fossil-bearing Strata at the Sihetun Section, West Liaoning: A preliminary result, Chinese Sci. Bull., 46(17), 1473-1476.
Zhu
R. X., Pan
Y.X., J. Shaw, D.M. Li and Q. Li (2001)
Geomagnetic palaeointensity just prior to the Cretaceous normal superchron, Phys.
Earth Planet. Inter. 128(1-4), 207-222.
Shi
C.D., Zhu R.X., Suchy V., Zeman A., Guo B.
and Pan Y.X. (2001)
Identification and origin of iron sulfides in Czech loess, Geophys.
Res. Lett. 28(20), 3903-3906
Guo
B, Zhu R X, Florindo F, Pan
Y.X., Yue L P (2001)
Pedogenesis effecting the Matuyama-Brunhes polarity transition recorded in
Chinese loess? Chinese Sci. Bull., 46(12), 975-981.
Zhu
R.X., Shi C.D., Suchy V., Zeman A., Guo B., Pan
Y.X.(2001)
Rock-magnetic properties of the Czech loess and its implication for
paloclimate, Science in China (D), 44 (5), 385-394.
2000
Pan
Y.X., Zhu R.X. and Banerjee
S. K. (2000) Rock-magnetic properties related to thermal-treatment of
Siderite: Behaviour and interpretation, J. Geophys. Res.
105(B1), 783-794.
Zhu
R.X., Pan
Y.X. and
Coe R. S. (2000)
Paleointensity studies of a lava succession from Jilin Province,
Northeastern China: An evidence for the Blake event, J. Geophys Res.,
105(B4), 8305-8318.
Zhu R.X., Guo B., Pan Y.X., Liu Qingsong (2000) Study on the reliability of geomagnetic secular variations recorded in a loess section at Lingtai, north-central China, Science in China 43(1): 1-9.
Liu Q S, Zhu R X, Pan Y X, Guo B. (2000) The statistical model for the secondary quick reversals during the geomagnetic pole transition. Sci. China, 43(3), 237-242.
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