Genesis of melilitolite from Colle Fabbri: inferences from melt inclusions
Tóm tắt
Melilite and wollastonite from the Colle Fabbri stock contain silicate melt and silicate-carbonate inclusions. The homogenization temperatures of silicate inclusions are within the magmatic temperature range of mantle ultrabasic melts: about 1,320 ± 15 °С. Their composition is melilititic and evolves to the composition of leucite tephrite and phonolite. The composition of silicate-carbonate inclusions are high SiO2, Ca-rich, enriched in alkalies and are similar to that of inclusions of carbonatite melts in the minerals of melilitolites of other intrusive ultramafic complexes. They are also similar to the compositions of metasomatized travertine covering the melilitolite stock. The presence of primary silicate and silicate-carbonate inclusions evidences that the melilitite magma from which melilitolites of Colle Fabbri crystallized was associated with carbonatite liquid. This liquid was highly fluidized, mobile and aggressive. Actively interacting with overlying travertine, the liquid enriched them with alkalies, aluminosilicates and incompatible elements, which resulted in the equalization of their compositions. Heterogeneous compositional dominions were formed at the contact between melilitolite and wall pelites. In the minerals of these contact facies high-Si melt inclusions of varying composition have been observed. Their occurrence is related to the local assimilation by the high-temperature melilitite magma of pelitic country rocks. The content of incompatible elements in melilitite melts and melilitolites is higher than the mantle norm and they have peculiar indicator ratios, spectra, Eu/Eu* ratio, which suggest a peculiar mantle source.
Tài liệu tham khảo
Anders E, Grevesse N (1989) Abundances of the elements: meteoritic and solar. Geochim Cosmochim Acta 53:197–214
Bailey DK (2005) Carbonate volcanics in Italy: numerical tests for the hypothesis of lava-sedimentary limestone mixing. Per Mineral 74(3):205–208
Bailey DK, Collier JD (2000) Carbonatite-melilitite association in the Italian collision zone and the Ugandan rifted craton: significant common factors. Min Mag 64(4):675–682
Bailey K, Lloyd F, Kearns S, Stoppa F, Eby N, Woolley A (2005) Melilitite at Fort Portal, Uganda: another dimension to the carbonate volcanism. Lithos 85:15–25
Bazarova TY, Bakumenko IT, Kostyug VP, Panina LI, Sobolev VS, Chepurov AI (1975) Magmatogenic crystallization according to the study of melt inclusions. Nauka, Novosibirsk
Bell K, Kjarsgaard B (2006) Discussion of Peccerillo (2004) “Carbonate-rich pyroclastic rocks from central Appennines: carbonatites or carbonated rocks?”. Per Min 75:85–92
Bell K, Castorina F, Rosatelli G, Stoppa F (2003) Large-scale, mantle plume activity below Italy: Isotopic evidence and volcanic consequences. Geophys Res Abstr 5:14217
Bell K, Castorina F, Lavecchia G, Rosatelli G, Stoppa F (2004) Is there a mantle plume below Italy? EOS 85(50):541–546
Bell K, Lavecchia G, Stoppa F (2005) Reasoning and beliefs about Italian geodynamics. Boll Soc Geol Ital 5:119–127
Bell K, Castorina F, Rosatelli G (2006) Plume activity, magmatism, and the geodynamic evolution of the Central Mediterranean. Ann Geophys 49(1):357–371
Beloussov VV, Gerasimovsky VI, Goryatchev AV, Dobrovolsky VV, Kapitsa AP, Logatchev NA, Milanovsky EE, Polyakov AI, Rykunov LN, Sedov VV (1974) East – African rift system 3 – Geochemistry, seismology: main results. Nauka, Moscow
Castorina F, Stoppa F, Cundari A, Barbieri M (2000) An enriched mantle source for Italy’s melilitite-carbonatite association as inferred by its Nd-Sr isotope signature. Min Mag 64:625–639
Coltorti M, Pieruccini P (1997) Middle-upper Pliocene “compression” and middle Pleistocene “extension” in the East Tiber basin: from“synform” to “extensional” basins in the Tyrrhenian side of the Northern Appennines (Central Italy). Il. Quaternario 10:521–528
Conticelli S, D’Antonio M, Pinarelli L, Civetta L (2002) Source contamination and mantle heterogeneity in the genesis of Italian potassic and ultrapotassic volcanic rocks: Sr–Nd–Pb isotope data from Roman Province and southern Tuscany. Min Petrol 74:223–252
Cundari A (1994) Role of subduction in the genesis of potassic basaltic rocks: a discussion paper on the unfashionable side of the role. Mineral Petrogr Acta 37:81–90
Cundari A, Ferguson AK (1991) Petrogenetic relationships between melilitite and lamproite in the Ronam Comagmatic Region: the lavas of San Venanzo and Cupaello. Contrib Mineral Petrol 107:343–357
Danyushevsky LV, McNeill AW, Sobolev AV (2002) Experimental and petrological studies of melt inclusions in phenocrysts from mantle-derived magmas: an overview of techniques, adventages and complications. Chem Geol 183:5–24
Deer WA, Howie RA, Zussman J (1963) Rock-forming minerals 2—Chain Silicates. Longmans, London
Gasperini D, Blichert-Toft J, Bosch D, Del Moro A, Macera P, Albarede F (2002) Upwelling of deep mantle material through a plate window: evidence from the geochemistry of Italian basaltic volcanics. J Geophys Res 107:2367–2371
Holm PM, Munksgaard NC (1982) Evidence for mantle metasomatism: an oxygen and strontium isotope study of the Vulsinian drstrict, Central Italy. Earth Planet Sci Lett 60:376–388
Laurenzi M, Stoppa F, Villa I (1994) Eventi ignei monogenici e depositi piroclastici nel Distretto Ultra-alcalino Umbro-laziale (ULUD): revisione, aggiornnamento e comparazione dei dati cronologici. Plinius 12:61–65
Lavecchia G, Stoppa F (1996) The tectonic significance of Italian magmatism: an alternative view to the popular interpretation. Terra Nova 8:435–446
Lavrent’ev Yu G, Pospelova LN, Sobolev NV, Malikov Yu I (1974) Determination of the composition of rock-forming minerals by X-ray microanalysis with an electron probe. Zavod Lab 6(40):657–665
Lustrino M (2000) Volcanic activity during the neogene to present evolution of the Western Mediterranean area: a review. Ofioliti 25:87–101
Melusso L, Morra V, Di Girolamo P (1996) The Mt. Vulture volcanic complex (Italy): evidence for distinct parental magmas and for residual melts with melilite. Miner Petrol 56:225–250
Melusso L, Conticelli S, D’Antonio M, Mirco NP, Saccani E (2003) Petrology and mineralogy of wollastonite- and melilite-bearing paralavas from the Central Apennines, Italy. Am Mineral 88:1287–1299
Melluso L, Conticelli S, D’Antonio M, Mirco NP, Saccani E (2005) Reply to Stoppa et al. 2005. Wollastonite-anorthite-gehlenite-, and fassaite-bearing rocks: igneous petrological oddity or paralavas? Am Mineral 90:1926–1933
Morimoto N (1989) Nomenclature of pyroxenes. Subcommittee on pyroxenes. Commission on new minerals and mineral names. Can Mineral 27:143–156
Osorgin NY Tomilenko AA (1990) Mikrotermokamera (Micro-thermostage). USSR Inventor's Certificate No. 1562816, Byull Izobret. 17
Panina LI, Usol’tseva LM (1999) Alkaline Ca-rich sulfate-carbonate melt inclusions in melilite-, monticcelite-, olivine-bearing rocks from Little Murun Massif (Aldan). Russ J Petrol 7(6):653–669
Panina LI, Sazonov AM, Usol’tseva LM (2001) Melilite- and monticellite-bearing rocks of Krestovskaya intrusion (Polar Siberia) and their genesis. Russ Geol Geophys 42(9):1314–1332
Panina LI, Stoppa F, Usol’tseva LM (2003) Genesis of melilitite rocks of Pian di Celle volcano, Umbrian Kamafugite Province, Italy: evidence from melt inclusions in minerals. Russ J Petrol 11(4):365–382
Peccerillo A (1995) Mafic ultrapotassic magmas in Central Italy: geochemical and petrochemical evidence against pripary composition. Mineral Petrogr Acta 37:229–245
Peccerillo A (1998) Relationships between ultrapotassic and carbonate-rich volcanic rocks in central Italy: petrogenetic implications and geodynamic significance. Lithos 43:267–279
Peccerillo A (2004) Carbonate-rich pyroclastic rocks from central Apennines: carbonatites or carbonated rocks? A commentary. Per Mineral 73:165–175
Peccerillo A (2005) Plio-Quaternary volcanism in Italy: petrology, geochemistry, geodynamics. Springer, Heidelberg
Rass IT, Plechov PY (2000) Melt inclusions in olivines of olivine—melilite rocks, Guli Massif, northwest of the Siberian Platform. Dokl Earth Sci 375(3):389–392
Roedder E (1981) Origin of fluid inclusions and changes that occur after trapping. In: Hollister LS, Crawford ML (eds) Fluid inclusions: applications to petrology. Mineralogical Association of Canada Short Course Handbook 6:101–137
Roedder E (1984) Fluid inclusions. Rev Mineral 12: 620 pp
Rosatelli G, Wall F, Stoppa F, Brilli M (2010) Geochemical distinctions between igneous carbonate, calcite cements, and limestone xenoliths (Polino carbonatite, Italy): spatially resolved LAICPMS analyses. Contrib Mineral Petrol 160(5):645–661
Schairer JF, Yoder HS, Tilley CE (1967) The high-termperature behavior of synthetic melilites in the join gehlenite-soda melilite-akermanite. Year Book of Carnegie Institute in Washington 65:217–226
Seifert W, Thomas R (1995) Silicate-carbonate immiscibility: a melt inclusion study of olivine melilitite and wehrlite xenoliths in tephrite from the Elbe Zone, Germany. Chem Erde 55:263–279
Serri G (1997) Neogene-Quaternary magmatic activity and its geodynamic implications in the Central Mediterranean region. Geodynamics 40:681–703
Sobolev AV (1996) Melt inclusions in minerals as a source of principle petrological information. Russ J Petrol 4:228–239
Stoppa F (1988) L’Euremite di Colle Fabbri (Spoleto): un litotipo ad affinità carbonatitica in Italia. Boll Soc Geol Ital 107:239–248
Stoppa F, Rosatelli G (2009) Ultramafic intrusion triggers hydrothermal explosions at Colle Fabbri (Spoleto, Umbria), Italy. J Volcanol Geotherm Res 187:85–92
Stoppa F, Sharygin VV (2009) Melilitolite intrusion and pelite digestion by high temperature kamafugitic magma at Colle Fabbri, Spoleto, Italy. Lithos 112:306–320
Stoppa F, Sharygin VV, Cundari A (1997) New mineral data from the kamafugite-carbonatite association: the melilitolite from Pian di Celle, Italy. Miner Petrol 61:27–45
Stoppa F, Cundari A, Rosatelli A, Woolley AR (2003) Leucite melilitolites in Italy: genetic aspects and relationships with associated alkaline rocks and carbonatites. Per Mineral 72:223–251
Stoppa F, Scordari F, Mesto E, Sharygin VV, Bortolozzi G (2010) Calcium-aluminum-silicate-hydrate “cement” phases and rare Ca-zeolite association at Colle Fabbri, Central Italy. Cent Eur J Geosci 2:175–187
Sun SS, McDonough WF (1989) Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes. In: Saunders AD, Norry MJ (eds) Magmatism in the ocean basins. Geological Society, London, pp 313–345
Turi B, Taylor HP, Ferrara G (1986) A criticism of the Holm-Munksgaard oxygen and strontium isotope study of the Vulsinian district, Central ltaly. Earth Planet Sci Lett 78:447–453
Woolley AR, Kempe DRC (1989) Carbonatites: nomenclature, average chemical compositions and element distribution. In: Bell K (ed) Carbonatites: genesis and evolution. Unwin Hyman, London, pp 105–148