Geochemistry of Rb, Sr and Ree in Niutoushan Basalts in the Coastal Area of Fujian Province, China

  1. Robert F. Mereu,
  2. Stephan Mueller and
  3. David M. Fountain
  1. Yu Xueyuan

Published Online: 9 APR 2013

DOI: 10.1029/GM051p0331

Properties and Processes of Earth's Lower Crust

Properties and Processes of Earth's Lower Crust

How to Cite

Xueyuan, Y. (1989) Geochemistry of Rb, Sr and Ree in Niutoushan Basalts in the Coastal Area of Fujian Province, China, in Properties and Processes of Earth's Lower Crust (eds R. F. Mereu, S. Mueller and D. M. Fountain), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM051p0331

Author Information

  1. Institute of Geochemistry, Academia Sinaca, Guiyang, P. R. China

Publication History

  1. Published Online: 9 APR 2013
  2. Published Print: 1 JAN 1989

ISBN Information

Print ISBN: 9780875904566

Online ISBN: 9781118666388

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Keywords:

  • Earth—Crust—Congresses;
  • Geophysics—Congresses

Summary

Analyses of major elements, REE, Rb, Sr and Rb-, Sr-isotopes show that the Niutoushan basalts of Fujian, China belong to the subalkaline volcanic rock series of active continental margins, Predominated by subalkaline basalts in association with minor amounts of alkaline basalts, this volcanic cone is well differentiated. the tholeiite in this area contains abundant mantle-source xenoliths and features a high Mg/Fe ratio. In addition, its Rb/Sr(0.0358),87Rb/86Sr (0.101) and 87Sr/86Sr(0.7038) ratios are very close to those typical of pyrolite. It is thus believed to be the parent magma of the basaltic rocks in this area. the subalkaline and alkaline basalts have similar 87Sr/86Sr ratios, the initial 87Sr/86Sr ratio is 0.7039±0.004. Batch Melting Model calculations on trace elements indicate that the olivine tholeiitic magma was derived from 7 % partial melting of garent Iherzolite from the upper mantle, From a simulated calculation on REE it is inferred that garnet was the residual phase during the upper mantle melting. Calculation of a Rb, Sr fractional crystallization model indicates that the alkaline basalt was the residual melt formed after the fractional crystallization of either 67–42% plagioclase and pyroxene cumulates or 43–25% plagioclase cumulates.