Geochemical characteristics and tectonic implications of HP-UHP eclogites and blueschists in Southwestern Tianshan China

Progress in Natural Science: Materials International

Volumn 16, Issue 6, 2006, Pages 624-632

  Ai, Yongliang ^a   Zhang, Lifei ^a   Li, Xuping ^b   Qu, Junfeng ^a  

^a PEKING UNIVERSITY   (China)

^b CHINA UNIVERSITY OF GEOSCIENCES   (China)

Author keywords

HP UHP metamorphic belt; Southwestern tianshan; Subduction accretion complex; Trace element geochemistry

Indexed keywords

EXPLORATORY GEOCHEMISTRY; FERTILIZERS; RARE EARTHS; SEDIMENTS; SUBMARINE GEOLOGY; TECTONICS; TRACE ELEMENTS; VOLCANOES;

BLUESCHISTS; ECLOGITES; GEOCHEMICAL CHARACTERISTIC; HP-UHP METAMORPHIC BELT; METAMORPHIC BELTS; MID-OCEANIC-RIDGE BASALTS; SOUTHWESTERN TIANSHAN; SUBDUCTION-ACCRETION COMPLEX; TIANSHAN; TRACE ELEMENT GEOCHEMISTRY;

BASALT;

EID: 84899781132     PISSN: 10020071     EISSN: None     Source Type: Journal    
DOI: 10.1080/10020070612330044     Document Type: Article

References (23)

1. Gao J., Zhang L., Wang Z., et al. Metamorphic minerals and metamorphism evolution of western Tianshan high pressure belt. Rock and Mineral Magazine (in Chinese), 1997, 16 (3):244-254.
2. Gao J., Li M., He G., et al. Paleozoic tectonic evolution of the Tianshan Orogen, northwestern China. Tectonophysics, 1998, 287:213-231.
3. Gao J., Klemd R., Zhang L., et al. P-T path of high pressure low temperature rocks and tectonic implications in the western Tianshan Mountains (NW China). Journal of Metamorphic Geology, 1999, 17:621-636.
4. Zhang L. F., Ellis D. J., Williams S., et al. Ultrahigh pressure metamorphism in western Tianshan China. Part II: Evidence from magnesite in eclogite. American Mineralogist, 2002, 87:861-866.
5. Zhang L. F., Ellis D. J., and Jiang W. Ultrahigh pressure metamorphism in western Tianshan China. Part I: Evidences from the inclusion of coesite pseudomorphs in garnet and quartz exsolution lamellae in omphacite in eclogites. American Mineralogist, 2002, 87:853-860.
6. Zhang L. F., Ellis D. J., Arculus R. J., et al. Ultradeep subduction of carbonates to the mantle evidence from the carbonate reaction of magnesite + calcite aragonite = dolomite in metapelites from western Tianshan, China Journal of Metamorphic Geology, 2003, 21:523-529.
7. Zhang L. F., Song S. G., Ai Y. L., et al. Relict coesite exsolution in omphacite from western Tianshan eclogites, China. American Mineralogist, 2005, 89:180-186.
8. Zhang L., Gao J., Ekerbair S., et al. Low temperature eclogite facies metamorphism in Western Tianshan Xinjiang. Science in China, (Series D), 2000, 30 (4):345-354.
9. Li Q. and Zhang L. The P-T path and geological significance of lowpressure granulite-facies metamorphism in Muzhaerte southwest Tianshan, Xinjiang, China. Acta Petrologica Sinica, (in Chinese), 2004, 20 (3):583-594.
10. Zhang L., Song S., Song B., et al. SHRIMP U-Pb zircon dating of HP-UHP metamorphic rocks from Western Tianshan, China. Abstract of The Alice Wain Memorial Western Norway Eclogite Field Symposium. NGU Report, 2003, 055:180.
11. Staudigel H., Plank T., White B., et al. Geochemical fluxes during seafloor alteration of the basaltic upper oceanic crust: DSDP sites 417 and 418. In: Subduction: Top to Bottom American Geophysical Union Geophysical Monograph, 1996, 19-38.
12. Becker H., Jochum K. P., and Carlson R. W. Trace element fractionation during dehydration of eclogites from high-pressure terranes and the implications for element fluxes in subduction zones. Chemical Geology, 2000, 163:65-99.
13. Niu Y., Regelous M., Wendt I. J., et al. Geochemistry of near-EPR seamounts: importance of source vs. process and the origin of enriched mantle component. Earth and Planetary Science Letters, 2002, 199:327-345.
14. Winchester J. A. and Floyd P. A. Geochemical magama type discrimination: application to altered and metamorphosed basic igneous rocks. Earth and Planetary Science Letters, 1976, 28:459-469.
15. Sun S. S. and McDonough W. F. Chemical and isotopic systemat-ics of oceanic basalts: implications for mantle composition and processes. In: Magmatism in the Ocean Basin. Geol. Soc. Spec. Publ., 1989, 42:313-345.
16. Thompson G., Bryan W. B., and Humphris S. E. Axial volcanism of the East Pacific Rise 10-12N. In: Magmatism in the Ocean Basin. Geol. Soc. Spec. Publ., 1989, 42:181-200.
17. Li S. Implications of εNd La Nb Ba Nb Nb Th diagrams to mantle heterogeneity-classification of island arc basalts and decomposition of EM II component. Geochemistry (in Chinese), 1994, 23 (2):105-114.
18. Pearce J. A., Baker P. E., Harvey P. K., et al. Geochemical evidence for subduction fluxes: mantle melting and fractional crystallization beneath the South Sandwich Island Arc. Oceanographic Literature Review, 1996, 43 (2):155.
19. Hofmann A. W. Mantle geochemistry: the message from oceanic volcanism. Nature, 1997, 385 (16):219-229.
20. Doubleday R. A., Leat P. T., Alabaster T., et al. Allochthonous oceanic basalts within the Mesozoic accretionary complex of Alexander Island. Antarctic: remnants of proto-Pacific oceanic crust. J. Geol. Soc. Lond., 1994, 151:65-78.
21. Floyd P. A. Geochemical discrimination and petrogenesis of alkalic basalt sequences in part of the Ankara melange, central Turkey. J. Geol. Soc. (Lond.), 1993, 150:541-550.
22. Volkova N. I. and Budanov V. I. Geochemical discrimination of metabasaltic rocks of the Fan-Karategin transitional blueschist, greenschist belt, South Tianshan, Tajikistan: seamount volcanism and accretionary tectonics. Lithos, 1999, 47:201-216.
23. Gao J. and Klemd R. Formation of HP-LT rocks and their tectonic implications in the western Tianshan, Orogen, NW China: geochemical and age constraints. Lithos, 2003, 66:1-22.