Skip to main content

Advertisement

SpringerLink
Log in

Minette mafic microgranular enclaves and their relationship to host syenites in systems formed at mantle pressures: major and trace element evidence from the Piquiri Syenite Massif, southernmost Brazil

  • Published:
Mineralogy and Petrology Aims and scope Submit manuscript

Summary

Mafic microgranular enclaves in the ultrapotassic Piquiri Syenitic Massif (611 ± 1 Ma) in southern Brazil represent a minette magma mingled with a syenitic one, both produced from similar mantle sources and emplaced in a post-collisional setting of Neoproterozoic age. The minette magma is compositionally close to typical minettes and high-SiO2 lamproites, with relatively high contents of LREE, Cs and Rb. It is slightly silica-undersaturated, ultrapotassic and metaluminous, with K2O/Na2O ratios around 2–3, and about 4–7 wt% K2O. The Piquiri minettes contain K-clinopyroxene and pyrope, which are interpreted to have crystallized under pressures about 5 GPa. Whole-rock and mineral chemistry indicate that the most suitable source for the minette magma is clinopyroxene-phlogopite-apatite-amphibole-sulphide ± garnet mantle veins, under pressures of about 5 GPa and melting temperatures over 1,000 °C. Fractional melting is admitted in order to explain the extremely high Rb, Cs and LREE contents of the minette melt, and is consistent with its estimated rheological behavior. The syenitic host-rock parental magma was produced from a similar source, probably at lower pressures, and the co-mingling probably occurred still at large depth, under pressures around 3 GPa. Rheological and geochemical considerations support a model based on fractional melting of a veined mantle which had been metasomatized during previous (760–700 Ma) ocean-plate consumption. The subduction-related metasomatism in the source is indicated by low LREE/(Nb or Ta) ratios, high Nb/Ta and U/Th ratios, and low Ti contents. The compositional similarity and close spatial and temporal association of minette and syenitic magmas can be explained by their common source region. Compared to typical lamproitic magmatism, the major difference is that the Piquiri minette magmas are derived from a subduction-modified source.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  • J Adam TH Green SH Sie (1993) ArticleTitleProton microprobe determined partitioning of Rb, Sr, Ba, Y, Zr, Nb, and Ta between experimentally produced amphiboles and silicate melts with variable F content Chem Geol 109 29–50 Occurrence Handle10.1016/0009-2541(93)90060-V

    Article  Google Scholar 

  • GD Astis A Peccerillo PD Kemton LL Volpe TW Wu (2000) ArticleTitleTransition from calc-alkaline to potassium-rich magmatism in subduction environments: geochemical and Sr, Nd, Pb isotopic constraints from the island of Vulcano (Aeolian Arc) Contrib Mineral Petrol 139 684–703 Occurrence Handle10.1007/s004100000172

    Article  Google Scholar 

  • SN Ayrton (1991) Appinites, lamprophyres and mafic magmatic enclaves: Three related products of interaction between acid and mafic magmas J Didier B Barbarin (Eds) Enclaves and Granite Petrology Elsevier Amsterdam 645–478

    Google Scholar 

  • M Bau (1996) ArticleTitleControls on the fractionation of isovalent trace elements in magmatic and aqueous systems: evidence from Y/Ho, Zr/Hf, and lanthanide tetrad effect Contrib Mineral Petrol 123 323–333 Occurrence Handle10.1007/s004100050159

    Article  Google Scholar 

  • Bergman SC (1987) Lamproites and other potassium-rich igneous rocks: a review of their occurrence, mineralogy and geochemistry. In: Fitton JG, Upton BGJ (eds) Alkaline Igneous Rocks, Geol Soc Spec Publ, London, pp 103–189

  • MF Bitencourt LVS Nardi (2000) ArticleTitleTectonic setting and sources of magmatism related to the Southern Brazilian Shear Belt Rev Bras Geoc 30 184–187

    Google Scholar 

  • Y Bottinga DF Weil (1972) ArticleTitleThe viscosity of magmatic silicate liquids: a model for calculation Am J Sci 272 438–475 Occurrence Handle10.2475/ajs.272.5.438

    Article  Google Scholar 

  • JM Brenan HF Shaw DL Phinney FJ Ryerson (1994) ArticleTitleRutile-aqueous fluid partitioningof Nb, Ta, Hf, Zr, U and Th: implications for high field strength element depletions in island-arc basalts Earth Plan Sci Lett 128 237–339 Occurrence Handle10.1016/0012-821X(94)90154-6

    Article  Google Scholar 

  • BB Brito Neves UG Cordani (1991) ArticleTitleTectonic evolution of South America during Late Proterozoic Precamb Res 53 23–40 Occurrence Handle10.1016/0301-9268(91)90004-T

    Article  Google Scholar 

  • G Carlier JP Lorand (1997) ArticleTitleFirst occurrence of diopside sanidine phlogopite lamproite in the Andean Cordillera: the Huacancha and Morojarja dykes, southern Peru Can J Earth Sci 34 1118–1127 Occurrence Handle10.1139/e17-090

    Article  Google Scholar 

  • SL Chung KL Wang AJ Crawford VS Kamenetsky CH Chen CY Lan CH Chen (2001) ArticleTitleHigh-Mg potassic rocks from Taiwan: implications for the genesis of orogenic potassic lavas Lithos 59 153–170 Occurrence Handle10.1016/S0024-4937(01)00067-6

    Article  Google Scholar 

  • J Didier (1973) Granites and their enclaves Elsevier Science Publishing Company London 393

    Google Scholar 

  • MJ Dorais C Floss (1992) ArticleTitleAn ion and electron microprobe study of the mineralogy of enclaves and host syenites of the Red Hill Complex, New Hampshire, USA J Petrol 33 1193–1218

    Google Scholar 

  • SF Foley (1992) ArticleTitleVein-plus-wall-rock melting mechanisms in the lithosphere and the origin of potassic alkaline magmas Lithos 28 435–453 Occurrence Handle10.1016/0024-4937(92)90018-T

    Article  Google Scholar 

  • SF Foley G Venturelli DH Green L Toscani (1987) ArticleTitleThe ultrapotassic rocks: characteristics, classification, and constraints for petrogenetic models Earth Sci Rev 24 81–134 Occurrence Handle10.1016/0012-8252(87)90001-8

    Article  Google Scholar 

  • S Esperança JR Holloway (1987) ArticleTitleOn the origin of some mica-lamprophyres: experimental evidence from a mafic minette Contrib Mineral Petrol 95 207–216 Occurrence Handle10.1007/BF00381270

    Article  Google Scholar 

  • NM Evensen PJ Hamilton RK O’Nions (1978) ArticleTitleRare-earth abundances in chondritic meteorites Geochim Cosmochim Acta 42 1199–1212 Occurrence Handle10.1016/0016-7037(78)90114-X

    Article  Google Scholar 

  • AS Gibson RN Thompson PT Leat MA Morrison GL Hendry AP Dickin JG Mitchell (1993) ArticleTitleUltrapotassic magmas along the flanks of the Oligo-Miocene Rio Grande Rift, USA: Monitors of the zone of lithospheric mantle extension and thinning beneath a continental rift J Petrol 34 187–228

    Google Scholar 

  • SA Gibson RN Thompson OH Leonardos AP Dickin JG Mitchell (1999) ArticleTitleThe limited extent of plume-lithosphere interactions during continental-flood basalt genesis: geochemical evidence from Cretaceous magmatism in southern Brazil Contrib Mineral Petrol 137 147–169 Occurrence Handle10.1007/s004100050588

    Article  Google Scholar 

  • DA Ionov AW Hofmann (1995) ArticleTitleNb–Ta-rich mantle amphiboles and micas: implications for subductionrelated metasomatic trace element fractionations Earth Plan Sci Lett 131 341–356 Occurrence Handle10.1016/0012-821X(95)00037-D

    Article  Google Scholar 

  • VA Janasi SRF Vlach HHGJ Ulbrich (1993) ArticleTitleEnriched-mantle contributions to the Itu Granitoid Belt, Southeastern Brazil: evidence from K-rich diorites and syenites An Acad Bras Cien 65 107–118

    Google Scholar 

  • PG Jeffery D Hutchison (1981) Chemical methods of rock analysis EditionNumber3 Pergamon Press Oxford 379

    Google Scholar 

  • Jost H, Brod JA, Holz M, Kuhn A, Flor MAD, Kronbauer A, Dillenburg S (1985) Geologia estrutural, petrografia e petrologia do sienito Piquiri (Proterozóico Superior), Rio Grande do Sul. In: Simpósio Sulbrasileiro de Geologia, 1985, Florianópolis. Anais … Florianópolis, SBG, pp 63–80

  • BS Kamber KD Collerson (2000) ArticleTitleZr/Nb systematics of Ocean Island Basalts reassessed – the case for binary mixing J Petrol 41 1007–1021 Occurrence Handle10.1093/petrology/41.7.1007

    Article  Google Scholar 

  • PT Leat RN Thompson MA Morrison GL Hendry AP Dickin (1988) ArticleTitleSilicic magmas derived by fractional crystallization from Miocene minette, Elkhead Mountains, Colorado Mineral Mag 52 577–585 Occurrence Handle10.1180/minmag.1988.052.368.03

    Article  Google Scholar 

  • EF Lima LVS Nardi (1998) ArticleTitleThe Lavras do Sul Shoshonitic Association: implications for the origin and evolution of Neoproterozoic shoshonitic magmatism southernmost Brazil J South Am Earth Sci 11 67–77 Occurrence Handle10.1016/S0895-9811(97)00037-0

    Article  Google Scholar 

  • RL Linnen H Keppler (1997) ArticleTitleColumbite solubility in granitic melts: consequences for the enrichment and fractionation of Nb and Ta in the Earth’s crust Contrib Mineral Petrol 128 213–227 Occurrence Handle10.1007/s004100050304

    Article  Google Scholar 

  • FE Lloyd M Arima AD Edgar (1985) ArticleTitlePartial melting of a phlogopite-clinopyroxenite nodule from southwest Uganda: an experimental study bearing on the origin of highly potassic continental rift volcanics Contrib Mineral Petrol 91 321–329 Occurrence Handle10.1007/BF00374688

    Article  Google Scholar 

  • D McKenzie (1989) ArticleTitleSome remarks on the movement of small melt fractions in the mantle Earth Plan Sci Lett 95 53–72 Occurrence Handle10.1016/0012-821X(89)90167-2

    Article  Google Scholar 

  • C Miller R Schuster U Klötzli W Frank F Purtscheller (1999) ArticleTitlePost-collisional potassic and ultrapotassic magmatism in SW Tibet: geochemical and Sr–Nd–Pb–O isotopic constraints for mantle source characteristics and petrogenesis J Petrol 40 1399–1424 Occurrence Handle10.1093/petrology/40.9.1399

    Article  Google Scholar 

  • RH Mitchell (1995) ArticleTitleMelting experiments on a sanidine phlogopite lamproite at 4–7 GPa and their bearing on the sources of lamproitic magmas J Petrol 36 1455–1474

    Google Scholar 

  • RH Mitchell E Edgar (2002) ArticleTitleMelting experiments in SiO2-rich lamproites to 6.4 GPa and their bearing on the sources of lamproite magmas Mineral Petrol 74 115–128 Occurrence Handle10.1007/s007100200000

    Article  Google Scholar 

  • LVS Nardi B Bonin (1991) ArticleTitlePost-orogenic and non-orogenic alkaline granite associations: the Saibro Intrusive Suite, Southern Brasil. A case study Chem Geol 92 197–212 Occurrence Handle10.1016/0009-2541(91)90056-W

    Article  Google Scholar 

  • RP Philipp R Machado LVS Nardi JM Lafon (2002) ArticleTitleO magmatismo granítico neoproterozóico do Batólito Pelotas no sul do Brasil: novos dados e revisão da geocronologia regional Rev Bras Geoc 32 277–290

    Google Scholar 

  • J Plá Cid LVS Nardi H Conceição B Bonin E Jardim De Sa (2000) ArticleTitleThe alkaline silica saturated ultrapotassic magmatism of the Riacho do Pontal Fold Belt, NE Brazil: an example of syenite-granite Neoproterozoic association J South Am Earth Sci 13 661–683 Occurrence Handle10.1016/S0895-9811(00)00047-X

    Article  Google Scholar 

  • J Plá Cid LVS Nardi PE Gisbert (2002) ArticleTitleTextural relations of lamprophyric maficmicrosyenitic enclaves and petrological implications for the egenesis of potassic syenitic magmas: the example of Piquiri Syenite, southern Brazil Pesq Geoc 29 21–30

    Google Scholar 

  • J Plá Cid LVS Nardi LZ Stabel RV Conceição NM Balzaretti (2003) ArticleTitleHigh-pressure minerals in mafic microgranular enclaves: evidences for co-mingling between lamprophyric and syenitic magmas at mantle conditions Contrib Mineral Petrol 145 444–459 Occurrence Handle10.1007/s00410-003-0451-4

    Article  Google Scholar 

  • J Plá Cid LVS Nardi P Enrique C Merlet B Boyer (2005) ArticleTitleSIMS analysis on trace and rare earth elemens in coexisting clinopyroxene and mica from minette mafic enclaves in potassic syenites crystallized under high pressures Contrib Mineral Petrol 148 675–688 Occurrence Handle10.1007/s00410-004-0626-7

    Article  Google Scholar 

  • D Prelevic SF Foley V Cvetkovic RL Romer (2004) ArticleTitleOrigin of minette by mixing of lamproite and dacite magmas in Veliki Majdan, Serbia J Petrol 45 759–792 Occurrence Handle10.1093/petrology/egg109

    Article  Google Scholar 

  • HR Shaw (1972) ArticleTitleViscosities of magmatic silicate liquids: an empirical method of prediction Am J Sci 272 870–893 Occurrence Handle10.2475/ajs.272.9.870

    Article  Google Scholar 

  • CA Sommer EF Lima LVS Nardi (1999) ArticleTitleO vulcanismo alcalino do Platô do Taquarembó, Dom Pedrito, RS Rev Bras Geoc 29 245–254

    Google Scholar 

  • LZ Stabel LVS Nardi J Plá Cid (2001) ArticleTitleQuímica mineral e evolução petrológica do Sienito Piquiri: magmatismo shoshonítico, neoproterozóico, pós-colisional no sul do Brasil Rev Bras Geoc 31 211–222

    Google Scholar 

  • N Vieira SuffixJr LAD Fernandes E Koester CS Scherer (1989) ArticleTitleMicrogranular enclaves from Piquiri syenitic massif, RS (Enclaves microgranulares do maciço sienítico de Piquiri-RS) Acta Geol Leopold 29 185–206

    Google Scholar 

  • BL Weaver (1991) ArticleTitleThe origin of ocean island basalt end-member compositions: trace element and isotopic constraints Earth Plan Sci Lett 104 381–197 Occurrence Handle10.1016/0012-821X(91)90217-6

    Article  Google Scholar 

  • W Wildner LVS Nardi EF Lima (1999) ArticleTitlePost-Collisional Alkaline Magmatism on the Taquarembó Plateau: A Well Preserved Neoproterozoic-Cambrian Plutono-Volcanic Association in Southern Brazil Inter Geol Rev 41 1082–1098 Occurrence Handle10.1080/00206819909465193

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Centro de Estudos em Petrologia e Geoquímica, Instituto de Geociências, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil

    L. V. S. Nardi, J. Plá Cid & M. F. Bitencourt

Authors
  1. L. V. S. Nardi
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. J. Plá Cid
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. M. F. Bitencourt
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Nardi, L., Plá Cid, J. & Bitencourt, M. Minette mafic microgranular enclaves and their relationship to host syenites in systems formed at mantle pressures: major and trace element evidence from the Piquiri Syenite Massif, southernmost Brazil. Mineralogy and Petrology 91, 101–116 (2007). https://doi.org/10.1007/s00710-007-0186-4

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00710-007-0186-4

Keywords

Search

Navigation