A micro-analytical approach to partition coefficients in plagioclase and clinopyroxene of basaltic sills in Serra Geral Formation, Paraná Basin, Brazil

Renner, Leonardo Cardoso; Hartmann, Léo Afraneo; Wildner, Wilson; Massonne, Hans-Joachim; Theye, Thomas

doi:10.25249/0375-7536.2011412263289

Abstract:

In the present study, detailed micro-analytical data (major and trace elements) in minerals from sills of Serra Geral Formation represents the first attempt to evaluate the partition coefficient of Sc, Ti, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Mo, Cs, Ba, REE, Hf, Ta, Pb, Th and U among coexisting plagioclase, augite and pigeonite from 12 tholeiitic basaltic sills along the eastern border of the Paraná Basin, Brazil. These 12 samples come from Rio Grande do Sul, Paraná, São Paulo and Goiás states. Plagioclase/melt partition coefficients K_D were determined in core, intermediate and rim zones using LA-ICP-MS and the results were compared with the variations of the elements Ca, Al, Na and Si in those areas. Partition coefficients of Sr and Eu decrease with the increase of Ca concentration in plagioclase. A reduction in temperature and consequently a rise in Na and Si levels increase the partition coefficients of Sr and Eu at the rim of mineral The K_D of Ni and V in clinopyroxene has positive correlations with Mg²⁺, Ca²⁺ and Al³⁺ due to higher concentrations of those elements at the core and lower concentration towards the rim and negative correlations of K_D of Sc, Cr, Co, Pb and Lu, due to preferential substitutions by Fe²⁺ in sixfold coordination. The use of LA-ICP-MS and EPMA made possible the chemical quantification of major and trace elements and the determination of partition coefficients in coexisting plagioclase and clinopyroxene in basaltic melts.

Keywords:
Partition coefficient; plagioclase; clinopyroxene; Serra Geral Formation; LA-ICP-MS

Resumo:

No presente estudo, dados detalhados de microanálise (elementos maiores e traços) em minerais de sills da Formação Serra Geral representam a primeira tentativa de avaliar o coeficiente de partição de Sc, Ti, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Mo, Cs, Ba, REE, Hf, Ta, Pb, Th e U entre plagioclásio, augita e pigeonita coexistentes em 12 sills basálticos toleíticos ao longo da borda leste da Bacia do Paraná, Brasil. Estas 12 amostras são dos estados do Rio Grande do Sul, Paraná, São Paulo e Goiás. Coeficientes de partição em plagioclásio foram comparados em zonas de núcleo, intermédio e borda, usando LA-ICP-MS, e os resultados foram comparados com as variações das áreas de distribuição dos elementos Ca, Al, Na e Si. O coeficiente de partição do Sr e Eu diminui com o aumento da concentração de Ca no plagioclásio e aumenta para a borda, relacionado com o aumento da concentração de Na e Si e diminuição da temperatura. O K_D do Ni e V nos clinopiroxênios analisados possui correlações positivas para Mg²⁺, Ca²⁺ e Al³⁺ devido a altas concentrações destes elementos no núcleo, diminuindo para a borda, e correlações negativas de K_D Sc, Cr, Co, Pb e Lu, devido a substituição preferencial pelo Fe²⁺ em coordenações octaédricas. O uso de LA-ICP-MS e EPMA possibilitam a caracterização química de elementos maiores e traços e a determinação do coeficiente de partição em minerais coexistentes e o líquido.

Palavras-chave:
Coeficiente de partição; plagioclásio; clinopiroxênio; Formação Serra Geral; LA-ICP-MS

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Acknowledgements

The first author wishes to thank CNPq and CAPES for the doctoral scholarship in Brazil and Germany, PRONEX-FAPERGS/CNPq (“Strategic Minerals”) for financial support. CPRM (Geological Survey Brazil) provided support and most of the sill samples. Stuttgart University provided Electron Microprobe facility and overall support.

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Publication Dates

Publication in this collection
Apr-Jun 2011

History

Received
31 Dec 2009
Accepted
04 Oct 2011

This is an open-access article distributed under the terms of the Creative Commons Attribution License

[1] Arth J.G. 1976. Behaviour of trace elements during magmatic processes - a summary of theorical models and their applications. J. Res. U.S. Geol. Surv, 4:41-47.

[2] Beattie P. 1993. The effect of partial melting of spinel peridotite on uranium series disequilibria: constraints from partitioning studies. Earth and Planetary Science Letters, 177:379-391. DOI: 10.1016/0012-821X(93)90091-M.
» https://doi.org/10.1016/0012-821X(93)90091-M

[3] Bellieni G., Comin-Chiaramonti P., Marques L.S., Melfi A.J., Nardy A.J.R., Paratrechas C., Le Bas M.J., Le Maitre R.W., Streckeisen A., Zannetin B. 1986. A chemical classification of volcanic rocks based on total alkali-silica diagram. Journal of Petrology, 27:745-750.

[4] Benjamin T., Heuser W.R., Burnett D.S. 1978. Laboratory studies of Actinide Partitioning Relevant to 244 PU Chronometry. In: Lunar and Planetary Institute, Lunar and Planetary Science Conference, 9, Proceedings Paper, p. 1.393-1.406.

[5] Best M.G. 2003. Igneous and Metamorphic Petrology 2.ed., Massachusetts, Blackwell Science Ltd., 729 p.

[6] Bindeman I.N., Davis A.M., Drake M.J. 1998. Ion microprobe study of plagioclases-basalt partition experiments at natural concentration levels of trace elements. Geochimica et Cosmochimica Acta, 62(7):1.175-1.193. DOI: 10.1016/S0016-7037(98)00047-7.
» https://doi.org/10.1016/S0016-7037(98)00047-7

[7] Bougault H., & Hekinian R. 1974. Rift valley in the Atlantic Ocean near 36 degrees 50’N; petrology and geochemistry of basalt rocks. Earth and Planetary Science Letters, 24(2):249-261. DOI: 10.1016/0012-821X(74)90103-4.
» https://doi.org/10.1016/0012-821X(74)90103-4

[8] Bowen N.L. 1928. The evolution of the igneous rocks Princeton, Princeton University Press, 334 p.

[9] Dale I.M., & Henderson P. 1972. The Partition of Transition Elements in Phenocryst-bearing Basalts and the Implications about Melt Structure. In: Geological Survey of Canada, International Geological Congress, 24, Sector 10, p. 105-111.

[10] Deer A.A.W., Howie R.A., Zussman J. 2003. Minerais constituintes das rochas - uma introdução Lisboa, Longmans, Green and Co. Ltda., 652 p.

[11] Dostal J., Dupuy C., Carron J.P., Dekerneizon M.., Maury R.C. 1983. Partition-Coefficients of Trace-Elements - Application to Volcanic-Rocks of St-Vincent, WestIndies. Geochimica et Cosmochimica Acta, 47(3):525-533. DOI: 10.1016/0016-7037(83)90275-2.
» https://doi.org/10.1016/0016-7037(83)90275-2

[12] Drake M.J., & Weill D.F. 1975. Partition of Sr, Ba, Ca, Y, Eu2+, Eu3+, and Other Ree between Plagioclases Feldspar and Magmatic Liquid - Experimental Study. Geochimica et Cosmochimica Acta, 39(5):689-712. DOI: 10.1016/0016-7037(75)90011-3.
» https://doi.org/10.1016/0016-7037(75)90011-3

[13] Duke J.M. 1976. Distribution of the period four transition elements among olivine, calcic clinopyroxene and mafic silicate liquid; experimental results. Journal of Petrology, 17(4):499-521.

[14] Dunn T., & Sen C. 1994. Mineral/Matrix Partition-Coefficients for Ortho-Pyroxene, Plagioclases, and Olivine in Basaltic to Andesitic Systems - a Combined Analytical and Experimental-Study. Geochimica et Cosmochimica Acta, 58(2):717-733. DOI: 10.1016/0016-7037(94)90501-0.
» https://doi.org/10.1016/0016-7037(94)90501-0

[15] Ewart A., Bryan W.B., Gill J.B. 1973. Mineralogy and Geochemistry of the Younger Volcanic Islands of Tonga, S. W. Pacific. Journal of Petrology, 14(3):429-465.

[16] Forsythe L.M., Nielsen R.L., Fisk M.R. 1994. High-FieldStrength Element Partitioning between Pyroxene and Basaltic to Dacitic Magmas. Chemical Geology, 117(1-4):107-125. DOI: 10.1016/0009-2541(94)90124-4.
» https://doi.org/10.1016/0009-2541(94)90124-4

[17] Frey F.A. 1969. Rare earth abundances in a high-temperature peridotite intrusion. Geochimica et Cosmochimica Acta, 33(11):1.429-1.447. DOI: 10.1016/0016-7037(69)90183-5.
» https://doi.org/10.1016/0016-7037(69)90183-5

[18] Fujimaki H., Tatsumoto M., Aoki K. 1984. Partition coefficients of Hf, Zr, and REE between phenocrysts and groundmasses. In: Lunar and Planetary Institute, Lunar and Planetary Science Conference, 14, Proceedings Paper, p. B662-B672.

[19] Gaetani G.A., & Grove T.L. 1995. Partitioning of Rare-Earth Elements between Clinopyroxene and Silicate Melt - Crystal-Chemical Controls. Geochimica et Cosmochimica Acta, 59(10):1.951-1.962. DOI: 10.1016/00167-0379(50)01190-.
» https://doi.org/10.1016/00167-0379(50)01190-

[20] Hack P.J, Nielsen R.L., Johnston A.D. 1994. Experimentally determined rare-Earth element and Y partitioning behavior between clinopyroxene and basaltic liquids at pressures up to 20 kbar. Chemical Geology, 117:89-105. DOI: 10.1016/0009-2541(94)90123-6.
» https://doi.org/10.1016/0009-2541(94)90123-6

[21] Hart S.R., & Brooks C. 1974. Clinopyroxene-matrix partitioning of K, Rb, Cs, Sr and Ba. Geochimica et Cosmochimica Acta, 38:1.799-1.806. DOI: 10.1016/0016-7037(74)90163-X.
» https://doi.org/10.1016/0016-7037(74)90163-X

[22] Hart S.R., & Dunn T. 1993. Experimental cpx/melt partitioning of 24 trace elements. Contributions to Mineralogy and Petrology, 113:1-8.

[23] Hauri E.H., Wagner T.P., Grove T.L. 1994. Experimental and natural partitioning of Th, U, Pb and other trace elements between garnet, clinopyroxene and basaltic melts. Chemical Geology, 117:149-166. DOI: 10.1016/0009-2541(94)90126-0.
» https://doi.org/10.1016/0009-2541(94)90126-0

[24] Irving A.J., & Frey F.A. 1984. Trace-Element Abundances in Megacrysts and Their Host Basalts - Constraints on Partition-Coefficients and Megacryst Genesis. Geochimica et Cosmochimica Acta, 48(6):1.201-1.221. DOI: 10.1016/0016-7037(84)90056-5.
» https://doi.org/10.1016/0016-7037(84)90056-5

[25] Irvine T.N., & Baragar W.R.A. 1971. A guide to the chemical classification of the common volcanic rocks. Canadian Journal of Earth Sciences, 8:523-548.

[26] Jenner G.A., Foley S.F., Jackson S.E., Green T.H., Fryer B.J., Longerich H.P. 1993. Determination of partition coefficients for trace elements in high pressuretemperature experimental run products by laser ablation microprobe-inductively coupled plasmamass spectrometry (LAM-ICP-MS). Geochimica et Cosmochimica Acta, 57(23-24):5.099-5.103.

[27] Kravuchuk I.K., Chernysheva I., Urosov S. 1981. Element distribution between plagioclases and groundmass as an indicator for crystallization conditions of the basalts in the southern vent of Tolbachik. Geochemistry International, 17:18-24.

[28] Larsen L.M. 1979. Distribution of Ree and Other TraceElements between Phenocrysts and Peralkaline Undersaturated Magmas, Exemplified by Rocks from the Gardar Igneous Province, South Greenland. Lithos, 12(4):303-315. DOI: 10.1016/0024-4937(79)90022-7.
» https://doi.org/10.1016/0024-4937(79)90022-7

[29] Lindsley D. 1983. Pyroxene thermometry. American Mineralogist, 68:477-493.

[30] Machado F.B. 2003. Geologia e possíveis zonas de efusão do magmatismo ácido cretácico da Bacia do Paraná Monografia (TCC), Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista, Rio Claro, 124 p.

[31] Matsui Y., Onuma N., Nagasawa H., Higuchi H., Banno S. 1977. Crystal structure control in trace element partition between crystal and magma. Tectonics, 100:315-324.

[32] McCallum I.S., & Charette M.P. 1978. Zr and Nb partition coefficients: implications for the genesis of mare basalts, kreep, and sea floor basalts. Geochimica et Cosmochimica Acta, 42:859-869. DOI: 10.1016/0016-7037(78)90098-4.
» https://doi.org/10.1016/0016-7037(78)90098-4

[33] McKay G., Le L., Wagstaff J., Crozaz G. 1994. Experimental partitioning of rare Earth elements and strontium: constraints on petrogenesis and redox conditions during crystallization of Antarctic angrite Lewis Cliff 86010. Geochimica et Cosmochimica Acta, 58:2.911-2.919. DOI: 10.1016/0016-7037(94)90124-4.
» https://doi.org/10.1016/0016-7037(94)90124-4

[34] McKenzie D., & O’Nions R.K. 1991. Partial melt distributions from inversion of rare Earth element concentrations. Journal of Petrology, 32:1.021-1.091.

[35] Melfi A.J., Piccirillo E.M., Nardy A.J.R. 1988. Geological and magmatic aspects of the Paraná Basin - an introduction. In: Piccirillo E.M., & Melfi A.J. (eds.) The Mesozoic flood volcanism of the Paraná Basin: petrogenetic and geophysical aspects São Paulo, Instituto Astronômico e Geofísico, p. 1-14.

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