Bulletin of Volcanology

BULLETIN OF VOLCANOLOGY

The Cerro Bitiche Andesitic Field: Petrological diversity and implications for magmatic evolution of mafic volcanic centers from the northern Puna.

Guadalupe Maro1* and Pablo J. Caffe 1

1 Instituto de Ecorregiones Andinas (INECOA), Universidad Nacional de Jujuy - CONICET, Instituto de Geología y Minería, Av. Bolivia 1661, San Salvador de Jujuy (CP 4600), Jujuy, Argentina.

*Corresponding author: Guadalupe Maro. Tel.: +54 388 4221593. E-mail address: [email protected] Table 9. Partition coefficients used in fractional crystallization models.

olivin RE orthopyroxen RE clinopyroxen RE Cr- RE plagioclas RE RE biotite e F e F e F spinel F e F F Ba 0.01 (1) 0.01 (1) 0.04 (1) 0.004 (2) 0.6 (5) 13.9 (5) Rb 0.01 (1) 0.02 (1) 0.01 (1) - 0.05 (1) 3.3 (5) Sr 0.01 (1) 0.04 (1) 0.06 (1) 1.8 (2) 0.31 (5) N 0.01 (1) 0.15 (1) 0.005 (1) 1.3 (5) 7.5 (5) b Y 0.01 (1) 0.18 (1) 0.9 (1) 0.06 (5) 0.51 (5) Zr 0.01 (2) 0.1 (7) 0.2 (2) - 0.01 (2) 0.6 (5) Ni 10 (2) 24 (8) 6 (2) 10 (4) 0.01 (2) 23.9 (5) Cr 0.6 (3) 10 (2) 30 (2) 1000 (6) 0.01 (2) 12.6 (7)

(1) Philpotts and Schnetzler (1970); (2) Gill (1981); (3) Gaetani and Grove (1997); (4) Righter et al. (2006); (5) Ewart and Griffin (1994); (6) Value calculated from mineral chemistry and whole-rock compositions; (7) Higuchi and Nagasawa (1969); (8) Lhur and Carmichael (1980).

References

Ewart A, Griffin WL (1994) Application of proton-microprobe data to trace-element partitioning in volcanic rocks. Chem Geol 117:251-284

Gaetani GA, Grove TL (1997) Partitioning of moderately siderophile elements among olivine, silicate melt, and sulfide melt: constraints on core formation in the Earth and Mars. Geochim

Cosmochim Acta 61:1829-1846

Gill JB (1981) Orogenic andesites and plate tectonics. Vol. 390, Springer-Verlag, Berlin

Higuchi H, Nagasawa H (1969) Partition of trace elements between rock-forming minerals and the host volcanic rocks. Earth Planet Sci Lett 7:281-287

Luhr JF, Carmichael IS (1980) The colima volcanic complex, Mexico. Contrib Mineral Petrol 71:343-372

Philpotts JA, Schnetzler CC (1970) Phenocryst-matrix partition coefficients for K, Rb, Sr and Ba, with applications to anorthosite and basalt genesis. Geochim Cosmochim Acta 34:307-322

Righter K, Leeman WP, Hervig RL (2006) Partitioning of Ni, Co and V between spinel-structured oxides and silicate melts: Importance of spinel composition. Chem Geol 227:1-25