The early Jurassic mafic-ultramafic intrusion and A-type granite from northeastern Guangdong, SE China: Age, origin, and tectonic significance

Lithos

Volumn 119, Issue 3-4, 2010, Pages 313-329

  Zhu, Wei Guang ^a   Zhong, Hong ^a   Li, Xian Hua ^b   He, De Feng ^a   Song, Xie Yan ^a   Ren, Tao ^a   Chen, Zhong Quan ^c   Sun, Hui Si ^d   Liao, Jin Qing ^d  

^a INSTITUTE OF GEOCHEMISTRY   (China)

^b INSTITUTE OF GEOLOGY AND GEOPHYSICS   (China)

^c Foshan Geological Bureau of Guangdong Province   (China)

^d Bureau of Geology and Mineral Resources of Guangdong Province   (China)

Author keywords

A type granites; Early Jurassic; Mafic ultramafic intrusion; SE China

Indexed keywords

A-TYPE ROCK; AGE DETERMINATION; CRUSTAL CONTAMINATION; FRACTIONAL CRYSTALLIZATION; GABBRO; GEOCHRONOLOGY; JURASSIC; LAYERED INTRUSION; MAFIC ROCK; MAGMATISM; PARTIAL MELTING; PETROGENESIS; PLUTON; RHYOLITE; SHRIMP DATING; TECTONIC EVOLUTION; TECTONIC SETTING; ULTRAMAFIC ROCK; URANIUM-LEAD DATING;

CHINA; GUANGDONG;

EID: 77956918669     PISSN: 00244937     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.lithos.2010.07.005     Document Type: Article

References (103)

1. Arth J.G. Behaviour of trace elements during magmatic processes: a summary of theoretical models and their applications. Journal of Research of the U.S. Geological Survey 1976, 4:41-47.
2. Barbarin B. A review of the relationships between granitoid types, their origins and their geodynamic environments. Lithos 1999, 46:605-626.
3. Beard J.S., Lofgren G.E. Dehydration melting and water saturated melting of basaltic and andesitic greenstones and amphibolites at 1, 3 and 6. 9kbar. Journal of Petrology 1991, 32:365-401.
4. Bonin B. A-type granite ring complex: mantle origin through crustal filters and the anorthosite-rapakivi magmatism connection. Petrology and Geochemistry of Magmatic Suites of Rocks in the Continental and Oceanic Crusts: Brussels, Belgium. Université Libre de Bruxelles, Royal Museum for Central Africa (Tervuren) 1996, 201-218. D. Demaiffe (Ed.).
5. Borg L.E., Clynne M.A. The petrogenesis of felsic calc-alkaline magmas from the southernmost Cascades, California: origin by partial melting of basaltic lower crust. Journal of Petrology 1998, 39:1197-1222.
6. Boynton W.V. Geochemistry of the rare earth elements: meteorite studies. Rare Earth Element Geochemistry 1984, 63-114. Elservier. P. Henderson (Ed.).
7. Cabanis B., Lecolle M. Le diagramme La/10-Y/15-Nb/8: un outil pour la discrimination des series volcaniques et la mise en evidence des procesus de melange et/ou de contamination crutale. Comptes Rendus de l'Académie des Sciences Series II 1989, 309:2023-2029.
8. Charvet J., Lapierre H., Yu Y. Geodynamic significance of the Mesozoic volcanism of southeastern China. Journal of Southeast Asian Earth Sciences 1994, 68:387-396.
9. Chen P.R., Zhang B.T., Kong X.G., Cai B.C., Ling H.F., Ni Q.S. Geochemical characteristics and tectonic implication of Zhaibei A-type granitic intrusive in south Jiangxi province. Acta Petrologica Sinica 1998, 14:289-298. (in Chinese with English abstract).
10. Chen P.R., Kong X.G., Wang Y.X., Ni Q.S., Zhang B.T., Ling H.F. Rb-Sr isotopic dating and significance of early Yanshanian bimodal volcanic-intrusive complex from southern Jiangxi Province, SE China. Geological Journal of China Universities 1999, 5:378-382. (in Chinese with English abstract).
11. Chen Z.Q., Li W.H., Guo L. Granite of Proterozoic eon found in northeast Guangdong. Guangdong Geology 2001, 16(4):16-21. (in Chinese with English abstract).
12. Chen Z.Q., Wu J.T., Kang Y.G. Characteristics of the Xianlan intrusion of basic-intermediate composition in Xingning. Guangdong Geology 2002, 17(1):38-43. (in Chinese with English abstract).
13. Chen Z.Q., Li W.H., Guo L. Geological and geochemical characteristics of Wengong pluton and the Relation with Xianlan pluton in Xingning. Guangdong Geology 2002, 17(3):15-20. (in Chinese with English abstract).
14. Chen P.R., Hua R.M., Zhang P.T., Lu J.J., Fan C.F. Early Yanshanian post-orogenic granitoids in the Nanling region: petrological constraints and geodynamic settings. Science in China Series D 2002, 45:755-768.
15. Chen P.R., Zhou X.M., Zhang W.L., Li H.M., Fan C.F., Sun T., Chen W.F., Zhang M. Petrogenesis and significance of early Yanshanian syenite-granite complex in eastern Nanling Range. Science in China Series D 2005, 48:912-924.
16. 39Ar dating, elemental and Sr-Nd-Pb isotopic geochemistry of the Mesozoic basalts. Lithos 2008, 106:83-92.
17. Collins W.J., Beams S.D., White A.J.R., Chappell B.W. Nature and origin of A-type granites with particular reference to southeastern Australia. Contributions to Mineralogy and Petrology 1982, 80:189-200.
18. Compston W., Williams I.S., Kirschvink J.L., Zhang Z., Ma G. Zircon U-Pb ages for the Early Cambrian time-scale. Journal of the Geological Society, London 1992, 149:171-184.
19. Cox K.G., Bell J.D., Pankhurst R.J. The Interpretation of Igneous Rocks 1979, Allen and Unwin, London, UK, 450 pp.
20. De la Roche H., Leterrier J., Granclaude P., Marchal M. A classification of volcanic and plutonic rocks using R1R2-diagram and major-element analyses-its relationships with current nomenclature. Chemical Geology 1980, 29:183-210.
21. Ding X., Chen P.R., Chen W.F., Huang H.Y., Zhou X.M. Single zircon LA-ICPMS U-Pb dating of Weishan granite (Hunan, South China) and its petrogenetic significance. Science in China Series D 2006, 49:816-827.
22. Eby G.N. Chemical subdivision of the A-type granitoids: petrogenetic and tectonic implications. Geology 1992, 20:641-644.
23. Ewart A., Milner S.C., Armstrong R.A., Duncan A.R. Etendeka volcanism of the Goboboseb Mountains and Messum igneous complex, Namibia. Part I: geochemical evidence of early Cretaceous Tristan Plume melts and the role of crustal contamination in the Parana-Etendeka CFB. Journal of Petrology 1998, 39:191-225.
24. Frost B.R., Barnes C.G., Collins W.J., Arculus R.J., Ellis D.J., Frost C.D. A geochemical classification for granitic rocks. Journal of Petrology 2001, 42:2033-2048.
25. Garland F., Turne S., Hawkesworth C. Shifts in the source of the Paraná basalts through time. Lithos 1996, 37:223-243.
26. Gilder S.A., Keller G.R., Luo M., Goodell P.C. Timing and spatial distribution of rifting in China. Tectonophysics 1991, 197:225-243.
27. Guffanti M., Clynne M.A., Muffler L.J.P. Thermal and mass implications of magmatic evolution in the Lassen volcanic region, California, and constraints on basalt influx to the lower curst. Journal of Geophysical Research 1996, 101:3001-3013.
28. Han B.F., Wang S.G., Jahn B.M., Hong D.W., Kagami H., Sun Y.L. Depleted-mantle source for the Ulungur River A-type granites from North Xinjiang, China: geochemistry and Nd-Sr isotopic evidence, and implications for Phanerozoic crustal growth. Chemical Geology 1997, 138:135-159.
29. Hay D.E., Wendlandt R.F. The origin of Kenya rift plateau type phonolites: results of high-pressure/high-temperature experiments in the system phonolite-H2O and phonolite-H2O-CO2. Journal of Geophysical Research 1995, 100:401-410.
30. Hoffman P.F. Speculations on Laurentia's first gigayear (2.0 to 1.0Ga). Geology 1989, 17:135-138.
31. Hofmann A.W., Jochum K.P. Source characteristics derived from very incompatible trace elements in Mauna Loa and Mauna Kea basalts, Hawaii Scientific Drilling Project. Journal of Geophysical Research 1996, 101(B5):11831-11839.
32. Holloway N.H. North Palawan Block, Philippines - its relation to Asian Mainland and role in evolution of South China Sea. AAPG Bulletin 1982, 66:1355-1383.
33. Huppert H.E., Sparks R.S.J. The generation of granitic magmas by intrusion of basalt into continental crust. Journal of Petrology 1988, 29:599-624.
34. Institute of Guangdong geological survey (IGGS), 2002. 1:50000 geological map of the Luogang Town (G50 E 022007) in the Xingning County, Guangdong province.
35. Jahn B.M., Chen P.Y., Yen T.P. Rb-Sr ages of granitic rocks in southeastern China and their tectonic significance. Geological Society of America 1976, 86:763-776.
36. Jahn B.M., Zhou X.H., Li J.L. Formation and tectonic evolution of southeastern China and Taiwan: isotopic and geochemical constraints. Tectonophysics 1990, 1990(183):145-160.
37. Jahn B.M., Wu F.Y., Lo C.H., Tsai C.H. Crust-mantle interaction induced by deep subduction of the continental crust: geochemical and Sr-Nd isotopic evidence from post-collisional mafic-ultramafic intrusions of the northern Dabie complex, central China. Chemical Geology 1999, 157:119-146.
38. Jiang Y.H., Jiang S.Y., Dai B.Z., Liao S.Y., Zhao K.D., Ling H.F. Middle to late Jurassic felsic and mafic magmatism in southern Hunan province, southeast China: implications for a continental arc to rifting. Lithos 2009, 107:185-204.
39. Jin W., Sun D. Deep Crustal Structure and its Evolution of South China 1997, Geological Publishing House, Beijing, 175 pp. (in Chinese with English summary).
40. King P.L., White A.J.R., Chappell B.W., Allen C.M. Characterization and origin of aluminous A-type granites from the Lachlan Fold Belt, southeastern Australia. Journal of Petrology 1997, 38:371-391.
41. Kong X.G., Chen P.R., Zhang B.T. Confirmation of A-type volcanics in Baimianshi and Dongkeng basin, south Jiangxi province and their geological implication. Geochimica 2000, 29:521-524. (in Chinese with English abstract).
42. Lan C.Y., Jahn B.M., Mertzman S.A., Wu T.W. Subduction-related granitic rocks of Taiwan. Journal of Southeast Asian Earth Sciences 1996, 14:11-28.
43. Lapierre H., Jahn B.M., Charvet J., Yu Y.W. Mesozoic magmatism in Zhejiang Province and its relation with the tectonic activities in SE China. Tectonophysics 1997, 274:321-338.
44. Li X.H. Timing of Cathaysia Block formation: constraints from SHRIMP U-Pb zircon geochronology. Episodes 1997, 20:188-192.
45. Li X.H. Cretaceous magmatism and lithospheric extension in Southeast China. Journal of Asian Earth Sciences 2000, 18:293-305.
46. Li Z.X., Li X.H. Formation of the 1300km-wide intracontinental orogen and post-orogenic magmatic province in Mesozoic South China: a flat-slab subduction model. Geology 2007, 35:179-182.
47. Li X.H., McCulloch M.T. Geochemical characteristics of Cretaceous mafic dikes from northern Guangdong, SE China: Age, origin and tectonic significance. AGU Geodynamics 1998, 27:405-419. Washington, DC. M.F.J. Flower, S.L. Chung, C.H. Lo, T.-Y. Lee (Eds.).
48. Li Z.X., Li X.H., Kinny P.D., Wang J. The breakup of Rodinia: did it start with a mantle plume beneath South China?. Earth and Planetary Science Letters 1999, 173:171-181.
49. Li X.H., Sun M., Wei G.J., Liu Y., Lee C.Y., Malpas J. Geochemical and Sm-Nd isotopic study of amphibolites in the Cathaysia Block, southeastern China: evidence for an extremely depleted mantle in the Paleoproterozoic. Precambrian Research 2000, 102:251-262.
50. Li X.H., Chen Z.G., Liu D.Y., Li W.X. Jurassic gabbro-granite-syenite suites from southern Jiangxi province, SE China: age, origin, and tectonic significance. International Geology Revview 2003, 45:898-921.
51. 39Ar dating, geochemistry, Sr-Nd isotopes and implications for the tectonic evolution of SE China. Geological Society, London, Special Publications 2004, vol. 226:193-216.
52. Li W.X., Li X.H., Li Z.X. Neoproterozoic bimodal magmatism in the Cathaysia Block of South China and its tectonic significance. Journal of Asian Earth Sciences 2005, 136:51-66.
53. Li X.H., Li Z.X., Li W.X., Wang Y.J. Initiation of the Indosinian Orogeny in South China: evidence for a Permian magmatic arc on the Hainan Island. The Journal of Geology 2006, 114:341-353.
54. Li X.H., Li Z.X., Li W.X., Liu Y., Yuan C., Wei G.J., Qi C.S. U-Pb zircon, geochemical and Sr-Nd-Hf isotopic constraints on age and origin of Jurassic I- and A-type granites from central Guangdong, SE China: a major igneous event in response to foundering of a subducted flat-slab?. Lithos 2007, 96:186-204.
55. Li X.H., Li W.X., Li Z.X. On the genetic classifications and tectonic implications of the Early Yanshanian granitoids in the Nanling Range of South China. Chinese Science Bulletin 2007, 52:1873-1885.
56. Li X.H., Liu Y., Li Q.L., Guo C.H., Chamberlain K.R. Precise determination of Phanerozoic zircon Pb/Pb age by multi-collector SIMS without external standardization. Geochemistry Geophysics Geosystems 2009, 10:Q04010. 10.1029/2009GC002400.
57. Li X.H., Li W.X., Wang X.C., Li Q.L., Liu Y., Tang G.Q. Role of mantle-derived magma in genesis of early Yanshanian granites in the Nanling Range, South China: in situ zircon Hf-O isotopic constraints. Science in China Series D 2009, 52:1262-1278.
58. Li Q.L., Li X.H., Liu Y., Tang G.Q., Yang J.H., Zhu W.G. Precise U-Pb and Pb-Pb dating of Phanerozoic baddeleyite by SIMS with oxygen flooding technique. Journal of Analytical Atomic Spectrometry 2010, 10.1039/B923444F.
59. Lightfoot P.C., Hawkesworth C.J., Hergt J., Naldrett A.J., Gorbachev N.S., Fedorenko V.A., Doherty W. Remobilisation of the continental lithosphere by a mantle plume: major-, trace-element, and Sr-, Nd-, and Pb-isotope evidence from picritic and tholeiitic lavas of the Noril'sk District, Siberian Trap, Russia. Contributions to Mineralogy and Petrology 1993, 114:171-188.
60. Loucks R.R. Discrimination of ophiolitic from nonophiolitic ultramafic-mafic allochthons in orogenic belts by the Al/Ti ratio in clinopyroxene. Geology 1990, 18:346-349.
61. 144Nd: differential evolution of the lunar crust and mantle. Earth and Planetary Science Letters 1978, 39:349-357.
62. Martin H., Bonin B., Capdevila R., Jahn B.M., Lameyre J., Wang Y. The Kuiqi peralkaline granitic complex (SE China): petrology and geochemistry. Journal of Petrology 1994, 35:983-1015.
63. Nedelec A., Stephens W.E., Fallick A.E. The Panafrican stratoid granites of Madagascar: alkaline magmatism in a postcollisional extensional setting. Journal of Petrology 1995, 36:1367-1391.
64. Ormerod D.S., Hawkesworth C.J., Rogers N.W., Leeman W.P., Menzies M.A. Tectonic and magmatic transitions in the western Great Basin, USA. Nature 1988, 333:349-353.
65. Paces J.B., Bell K. Non-depleted sub-continental mantle beneath the Superior Province of the Canadian Shield: Nd-Sr isotopic and trace element evidence from midcontinent rift basalts. Geochimica et Cosmochimica Acta 1989, 53:2023-2035.
66. Pearce J.A., Harris N.B.W., Tindle A.G. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks. Journal of Petrology 1984, 25:956-983.
67. Peate D.W., Hawkesworth C.J., Mantovani M.S.M. Chemical stratigraphy of the Parana lavas South America: classification of magma-types and their spatial distribution. Bulletin of Volcanology 1992, 55:119-139.
68. Peccerillo A., Barberio M.R., Yirgu G., Ayalew D., Barbieri M., Wu T.W. Relationships between mafic and peralkaline silicic magmatism in continental rift settings: a petrological, geochemical and isotopic study of the Gedemsa Volcano, central Ethiopian rift. Journal of Petrology 2003, 44:2003-2032.
69. Qi L., Hu J., Grégoire D.C. Determination of trace elements in granites by inductively coupled plasma mass spectrometry. Talanta 2000, 51:507-513.
70. Riley T.R., Leat P.T., Pankhurst R.J., Harris C. Origin of large volume rhyolitic volcanism in the Antarctic Peninsula and Patagonia by crustal melting. Journal of Petrology 2001, 42:1043-1065.
71. Rogers J.J.W., Greenberg J.K. Late-orogenic, post-orogenic, and anorogenic granites: distinction by major element and trace element chemistry and possible origins. Journal of Petrology 1990, 98:291-309.
72. Rollinson Using Geochemical Data: Evolution, Presentation, Interpretation 1993, Longman scientific and Technical, 352 pp.
73. Rudnick R.L., Fountain D.M. Nature and composition of the continental crust: a lower crustal perspective. Reviews of Geophysics 1995, 33:267-309.
74. Sewell R.J., Campbell S.D.G. Geochemistry of coeval Mesozoic plutonic and volcanic suites in Hong Kong. Journal of the Geological Society, London 1997, 154:1053-1066.
75. Song B., Zhang Y.H., Wan Y.S., Jian P. Mount making and procedure of the SHRIMP dating. Geological Review 2002, 48:26-30. (Suppl., in Chinese with English abstract).
76. Stacey J.S., Kramers J.D. Approximation of terrestrial lead isotope evolution by a two-stage model. Earth and Planetary Science Letters 1975, 26:207-221.
77. Steiger R.H., Jäger E. Subcommission on geochronology: convention on the use of decay constants in geo- and cosmochronology. Earth and Planetary Science Letters 1977, 36:359-362.
78. Sun S.-S., McDonough W.F. Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. Geological Society, London, Special Publications 1989, no. 42:313-345.
79. Sun Q.H., Yang Z.L., Chen Y., Li Q.H., Xing G.F. Metallogenic geology of the Xianlan-Yonghe vanadic titanomagnetite deposit belt in Xingning of Guangdong province. Resources Survey and Environment 2002, 23:266-271. (in Chinese with English abstract).
80. Sylvester P.J. Post-collisional alkaline granites. Journal of Petrology 1989, 97:261-280.
81. Thy P., Beard J.S., Logfren G.E. Experimental constraints on the origin of Icelandic rhyolites. Journal of Petrology 1990, 98:417-421.
82. Turner S.P., Foden J.D., Morrison R.S. Derivation of some A-type magmas by fractionation of basaltic magma: an example from the Padthaway Ridge, South Australia. Lithos 1992, 28:151-179.
83. Wan Y.S., Liu D.Y., Wilde S.A., Cao J.J., Chen B., Dong C.Y., Song B., Du L.L. Evolution of the Yunkai Terrane, South China: evidence from SHRIMP zircon U-Pb dating, geochemistry and Nd isotope. Journal of Asian Earth Sciences 2010, 37:140-153.
84. Wang W.H. Reappraisal of the Xianlan weathering crust vanadic titanomagnetite deposit in Xingneng. Guangdong Geology 1999, 14(4):22-29. (in Chinese with English abstract).
85. Wang Y.J., Fan W.M., Guo F., Peng T.P., Li C.W. Geochemistry of Mesozoic mafic rocks adjacent to the Chenzhou-Linwu fault, South China: implications for the lithospheric boundary between the Yangtze and Cathaysia Blocks. International Geology Review 2003, 45:263-286.
86. Wang Y.J., Fan W.M., Peng T.P., Guo F. Early Mesozoic OIB-type alkaline basalts in central Jiagnxi Province and its tectonic implication. Geochimica 2004, 33:109-117. (in Chinese with English abstract).
87. Wang Q., Li J.W., Jian P., Zhao Z.H., Xiong X.L., Bao Z.W., Xu J.F., Li C.F., Ma J.L. Alkaline syenites in eastern Cathaysia (South China): link to Permian-Triassic transtension. Earth and Planetary Science Letters 2005, 230:339-354.
88. Wang Y.J., Fan W.M., Peng T.P., Guo F. Elemental and Sr-Nd isotopic systematics of the early Mesozoic volcanic sequence in southern Jiangxi Province, South China: petrogenesis and tectonic implications. International Journal of Earth Sciences 2005, 94:53-65.
89. Watson E.B., Capobianco C.J. Phosphorus and the rare earth elements in felsic magmas an assessment of the role of apatite. Geochimica et Cosmochimica Acta 1981, 45:2349-2358.
90. Watson E.B., Harrison T.M. Zircon saturation revisited: temperature and composition effects in a variety of crustal magma types. Earth and Planetary Science Letters 1983, 64:295-304.
91. Whalen J.B., Currie K.L., Chappell B.W. A-type granites: geochemical characteristics, discrimination and petrogenesis. Contributions to Mineralogy and Petrology 1987, 95:407-419.
92. Wiedenbeck M., Alle P., Corfu F., Griffin W.L., Meier M., Oberli F., Vonquadt A., Roddick J.C., Speigel W. Three natural zircon standards for U-Th-Pb, Lu-Hf, trace-element and REE analyses. Geostandard Newsletter 1995, 19:1-23.
93. Winchester J.A., Floyd P.A. Geochemical magma type discrimination: application to altered and metamorphosed igneous rocks. Earth and Planetary Science Letters 1976, 45:326-336.
94. Wu F.Y., Sun D.Y., Li H.M., Jahn B.M., Wilde S.A. A-type granites in northeastern China: age and geochemical constraints on their petrogenesis. Chemical Geology 2002, 187:143-173.
95. Xie M.M., Liu C.G., Li S., Liu C.G., Li S. Geological feature of Xiakengzi pluton of Anyuan, south and geological significance of Pb-Pb isotopic age of zircon. Jiangxi Geology 2001, 15:256-269. (in Chinese with English abstract).
96. Xing G.F., Yang Z.L., Sun Q.H., Shen J.L., Tao K.L. Bull. Early Jurassic layered mafic-ultramafic intrusions in Meizhou, Guangdong province. Bulletin of Mineralogy, Petrology and Geochemistry 2001, 20:172-175. (in Chinese with English abstract).
97. Xing G.F., Yang Z.L., Mao J.R., Shu L.S., Shen J.L., Sun Q.H., Chen Y., Tao K.Y. Characteristics of early Jurassic igneous rocks on the continental margin of southeastern China and their tectonic significance. Geological Bulletin of China 2002, 21:384-391. (in Chinese with English abstract).
98. Xu Y.G., Chung S.L., Jahn B.M., Wu G.Y. Petrologic and geochemical constraints on the petrogenesis of Permian-Triassic Emeishan flood basalts in southwestern China. Lithos 2001, 58:145-168.
99. Yu X.Q., Di Y.J., Wu G.G., Zhang D., Zheng Y., Dai Y.P. The early Jurassic magmatism in northern Guangdong province, southeastern China: constraints from SHRIMP zircon U-Pb dating of Xialan complex. Science in China Series D 2009, 52:471-483.
100. Zhou X.M., Li W.X. Origin of Late Mesozoic igneous rocks in Southeastern China: implications for lithosphere subduction and underplating of mafic magmas. Tectonophysics 2000, 326:269-287.
101. Zhou J.C., Jiang S.Y., Wang X.L., Yang J.H. Re-Os isochron age of Fankeng basalts from Fujian of SE China and its geological significance. Geochemical Journal 2005, 39:497-502.
102. Zhou X.M., Sun T., Shen W.Z., Shu L.S., Niu Y.L. Petrogenesis of Mesozoic granitoids and volcanic rocks in South China: a response to tectonic evolution. Episodes 2006, 29:26-33.
103. Zhou J.C., Jiang S.Y., Wang X.L., Yang J.H., Zhang M.Q. Study on lithogeochemistry of Middle Jurassic basalts from southern China represented by the Fankeng basalts from Yongding of Fujian Province. Science in China Series D 2006, 49:1020-1031.