Geochemistry of Cenozoic volcanic rocks from Kirin Province, northeast China
作者： Chu-Nan Hsu , Ju-Chin Chen , Kung-Suan Ho
关键词:
摘要: The major volcanic activity in Kirin Province, northeast China occurred Changpaishan area and lasted from the Miocene to Holocene. rocks include basanite, alkali basalt, tholeiite, trachyte, rhyolite. Ultramafic xenoliths megacrysts occur basanite basalt. compatible (Ni, Cr, Sc, V, Co) incompatible elements (Rb, Li, Th, Hf, La, Lu, Nb, Zr, Y) vary systematically with 100MgO/(MgO + ΣFeO) rocks. Fractional crystallization clearly was important magmatic evolution. their ultramafic have characteristic Sr Nd isotopic ratios which fall between DMM EM-I or EM-II. There are two types of spinel-lherzolite basalts Province: (1) an E-type enriched LREE (La/Yb)N varying 6.6 8.15; (2) a D-type depleted 0.2 0.7 indicating mantle heterogeneity region. lherzolites contain higher TiO2, K2O, P2O5, Rb, Sr, Ba, Y, Ta, Th U than lherzolites. former may resulted metasomatic processes. basalt been derived isotopically similar source through different degree partial melting at P-T conditions. trachyte be fractional plagioclase, olivine, clinopyroxene magnetite.
harvard.edu
sci-hub.se 参考文章(32)
Kan Tu, Martin F.J. Flower, Richard W. Carlson, Guanghong Xie, Chu-Yung Chen, Ming Zhang, Magmatism in the South China Basin Chemical Geology. ,vol. 97, pp. 47- 63 ,(1992) , 10.1016/0009-2541(92)90135-R
Bernard Dupré, Claude J. Allègre, Pb–Sr isotope variation in Indian Ocean basalts and mixing phenomena Nature. ,vol. 303, pp. 142- 146 ,(1983) , 10.1038/303142A0
ZH. M. ZHANG, J. G. LIOU, R. G. COLEMAN, An outline of the plate tectonics of China Geological Society of America Bulletin. ,vol. 95, pp. 295- 312 ,(1984) , 10.1130/0016-7606(1984)95<295:AOOTPT>2.0.CO;2
John C. Mutter, W. Roger Buck, Carolyn M. Zehnder, Convective partial melting: 1. A model for the formation of thick basaltic sequences during the initiation of spreading Journal of Geophysical Research. ,vol. 93, pp. 1031- 1048 ,(1988) , 10.1029/JB093IB02P01031
Stanley R. Hart, Heterogeneous mantle domains: signatures, genesis and mixing chronologies Earth and Planetary Science Letters. ,vol. 90, pp. 273- 296 ,(1988) , 10.1016/0012-821X(88)90131-8
Z.C Peng, R.E Zartman, K Futa, D.G Chen, Pb-, Sr- and Nd-isotopic systematics and chemical characteristics of Cenozoic basalts, eastern China Chemical Geology: Isotope Geoscience Section. ,vol. 59, pp. 3- 33 ,(1986) , 10.1016/0168-9622(86)90054-0
Gordon A. McKay, Crystal/liquid partitioning of REE in basaltic systems: Extreme fractionation of REE in olivine Geochimica et Cosmochimica Acta. ,vol. 50, pp. 69- 79 ,(1986) , 10.1016/0016-7037(86)90049-9
K.J. Fraser, C.J. Hawkesworth, A.J. Erlank, R.H. Mitchell, B.H. Scott-Smith, Sr, Nd and Pb isotope and minor element geochemistry of lamproites and kimberlites Earth and Planetary Science Letters. ,vol. 76, pp. 57- 70 ,(1985) , 10.1016/0012-821X(85)90148-7
Sven Maaløe, Estimation of the degree of partial melting using concentration ratios Geochimica et Cosmochimica Acta. ,vol. 58, pp. 2519- 2525 ,(1994) , 10.1016/0016-7037(94)90028-0
Peter B. Kelemen, Nobumichi Shimizu, Todd Dunn, Relative depletion of niobium in some arc magmas and the continental crust : partitioning of K, Nb, La, and Ce during melt/rock reaction in the upper mantle Earth and Planetary Science Letters. ,vol. 120, pp. 111- 134 ,(1993) , 10.1016/0012-821X(93)90234-Z