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Time-dependent geochemistry of clinopyroxene from Alban Hills (Central Italy): clues to source and evolution of ultrapotassic magmas.
Author(s)
Language
English
Status
Published
JCR Journal
JCR Journal
Peer review journal
Yes
Title of the book
Issue/vol(year)
/86 (2006)
Publisher
Elsevier
Pages (printed)
330–346
Issued date
2006
Alternative Location
Abstract
We investigated chemical and isotopic compositions of clinopyroxene crystals from well age-constrained juvenile scoria
clasts, lava flows, and hypoabyssal magmatic ejecta representative of the whole eruptive history of the Alban Hills Volcanic
District. The Alban Hills is a Quaternary ultra-potassic district that was emplaced into thick limestone units along the
Tyrrhenian margin of Italy. Alban Hills volcanic products, even the most differentiated, are characterised by low SiO2 content.
We suggest that the low silica activity in evolving magmas can be ultimately due to a decarbonation process occurring at the
magma/limestone interface. According to the liquid line of descent we propose, the differentiation process is driven by
crystallisation of clinopyroxene+leuciteFapatiteFmagnetite coupled with assimilation of a small amount of calcite and/or
with interaction with crustal CO2. By combining age, chemical data, strontium and oxygen isotopic compositions, and REE
content of clinopyroxene, we give insights into the evolution of primitive ultrapotassic magmas of the Alban Hills Volcanic
District over an elapsed period of about 600 kyr. Geochemical features of clinopyroxene crystals, consistent with data coming
from other Italian ultrapotassic magmas, indicate that Alban Hills primary magmas were generated from a metasomatized
lithospheric mantle source. In addition, our study shows that the 87Sr / 86Sr and LREE/HREE of Alban Hills magmas
continuously diminished during the 600–35 ka time interval of the Alban Hills eruptive history, possibly reflecting the
progressive depletion of the metasomatized mantle source of magmas.
clasts, lava flows, and hypoabyssal magmatic ejecta representative of the whole eruptive history of the Alban Hills Volcanic
District. The Alban Hills is a Quaternary ultra-potassic district that was emplaced into thick limestone units along the
Tyrrhenian margin of Italy. Alban Hills volcanic products, even the most differentiated, are characterised by low SiO2 content.
We suggest that the low silica activity in evolving magmas can be ultimately due to a decarbonation process occurring at the
magma/limestone interface. According to the liquid line of descent we propose, the differentiation process is driven by
crystallisation of clinopyroxene+leuciteFapatiteFmagnetite coupled with assimilation of a small amount of calcite and/or
with interaction with crustal CO2. By combining age, chemical data, strontium and oxygen isotopic compositions, and REE
content of clinopyroxene, we give insights into the evolution of primitive ultrapotassic magmas of the Alban Hills Volcanic
District over an elapsed period of about 600 kyr. Geochemical features of clinopyroxene crystals, consistent with data coming
from other Italian ultrapotassic magmas, indicate that Alban Hills primary magmas were generated from a metasomatized
lithospheric mantle source. In addition, our study shows that the 87Sr / 86Sr and LREE/HREE of Alban Hills magmas
continuously diminished during the 600–35 ka time interval of the Alban Hills eruptive history, possibly reflecting the
progressive depletion of the metasomatized mantle source of magmas.
References
Barbieri, M., Penta, A., Turi, B., 1976. Oxygen and strontium
isotope ratios in some ejecta from the Alban Hills volcanic
area, Roman Comagmatic Region. Contributions to Mineralogy
and Petrology 51, 127– 133.
Beccaluva, L., Di Girolamo, P., Serri, G., 1991. Petrogenesis and
tectonic setting of the Roman Volcanic Province, Italy. Lithos
26, 191–221.
Beccaluva, L., Coltorti, M., Di Girolamo, P., Melluso, L., Dilani, L.,
Morra, V., Siena, F., 2002. Petrogenesis and evolution of Mt.
Vulture alcaline volcanism (Southern Italy). Mineralogy and
Petrology 74, 277– 297.
Bohrson, W.A., Spera, F.J., 2001. Energy-constrained open-system
magmatic processes II, application of energy-constrained assimilation–
fractional crystallization (EC-AFC) model to magmatic
systems. Journal of Petrology 42, 1019– 1041.
Chiarabba, C., Amato, A., Delaney, P.T., 1997. Crustal structure,
evolution, and volcanic unrest of the Alban Hills, Central Italy.
Bulletin of Volcanology 59, 161– 170.
Conticelli, S., Peccerillo, A., 1992. Petrology and geochemistry of
potassic and ultrapotassic volcanism in central Italy: petrogenesis
and inferences on the evolution of the mantle sources.
Lithos 28, 221– 240.
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.
Mineralogy and Petrology 74, 189– 222.
Dallai, L., Freda, C., Gaeta, M., 2004. Oxygen isotope
geochemistry of pyroclastic clinopyroxene monitors carbonate
contributions to Roman-type ultrapotassic magmas.
Contributions to Mineralogy and Petrology. doi:10.1007/
s00410-004-0602-2.
DePaolo, D.J., 1981. Trace element and isotopic effects of combined
wall-rock assimilation and fractional crystallization. Earth
and Planetary Science Letters 53, 189– 202.
De Rita, D., Funiciello, R., Parotto, M., 1988. Geological Map of
the Colli Albani Volcanic Complex. Progetto Finalizzato Geodinamica
CNR, Rome.
De Rita, D., Faccenna, C., Funiciello, R., Rosa, C., 1995. Stratigraphy
and volcano-tectonics. In: Trigila, R. (Ed.), The Volcano
of the Alban Hills. Universita` degli Studi di Roma bLa
SapienzaQ, Rome, Italy, pp. 33–71.
Di Battistini, G., Montanini, A., Vernia, L., Bargossi, G.M., Castorina,
F., 1998. Petrology and geochemistry of ultrapotassic rocks
from the Montefiascone Volcanic complex (Central Italy): magmatic
evolution and petrogenesis. Lithos 43, 169– 195.
Federico, M., Peccerillo, A., Barbieri, M., Wu, T.W., 1994. Mineralogical
and geochemical study of granular xenoliths from the
Alban Hills volcano, Central Italy: bearing on evolutionary
processes in potassic magma chambers. Contributions to Mineralogy
and Petrology 115, 384– 401.
Ferrara, G., Laurenzi, M.A., Taylor Jr., H.P., Tonarini, S., Turi, B.,
1985. Oxygen and strontium isotope studies of K-rich volcanic
rocks from the Alban Hills, Italy. Earth and Planetary Science
Letters 75, 13–28.
Ferrara, G., Preite-Martinez, M., Taylor Jr., H.P., Tonarini, S., Turi,
B., 1986. An oxygen and strontium isotope study of the M.
Vulsini volcanic area, Central Italy. Contributions to Mineralogy
and Petrology 92, 269–280.
Foley, S.F., 1992. Vein-plus-wall rock melting mechanisms in the
lithosphere and the origin of potassic rocks. Lithos 28, 435– 453.
Foley, S.F., Jenner, G.A., 2004. Trace element partitioning in lamproitic
magmas—the Gaussberg olivine leucitite. Lithos 75,
19– 38.
Foley, S.F., Venturelli, G., Green, D.H., Toscani, L., 1987. The
ultrapotassic rocks: characteristics, classification, and constraints
for petrogenetic models. Earth Sciences Review 24, 81– 134.
Foley, S.F., Jackson, S.E., Fryer, B.J., Greenough, J.D., Jenner,
G.A., 1996. Trace element partition coefficients for clinopyroxene
and phlogopite in an alkaline lamprophyre from Newfoundland
by LAM-ICP-MS. Geochimica et Cosmochimica
Acta 60, 629–638.
Fornaseri, M., Scherillo, A., Ventriglia, U., 1963. La regione vulcanica
dei Colli Albani. Vulcano Laziale. CNR, Rome, pp. 1– 561.
Franzini, M., Leoni, L., Saitta, M., 1972. A simple method to
evacuate the matrix effect in X-ray fluorescence analysis. Xray
Spectrometry 1, 151–154.
Freda, C., Gaeta, M., Palladino, D.M., Trigila, R., 1997. The Villa
Senni Eruption (Alban Hills, central Italy): the role of H2O and
CO2 on the magma chamber evolution and on the eruptive
scenario. Journal of Volcanology and Geothermal Research
78A, 103– 120.
Funiciello, R., Parotto, M., 1978. Il substrato sedimentario nell’area
dei Colli Albani: considerazioni geodinamiche e paleogeografiche
sul margine tirrenico dell’Appennino centrale. Geologica
Romana 17, 233–287.
Gaeta, M., 1996. Ca–Fe-rich exsolution lamellae from olivine in a
wehrlitic xenolith, Monti Vulsini volcanic district, Central Italy.
Mineralogica et Petrographica Acta 39, 159–167.
M. Gaeta et al. / Lithos 86 (2006) 330–346 345
Gaeta, M., Freda, C., 2001. Strontian fluoro-magnesiohastingsite in
Alban Hills lavas (Central Italy): crystallization conditions.
Mineralogical Magazine 65, 787–795.
Gaeta, M., Fabrizio, G., Cavarretta, G., 2000. F-phlogopites in the
Alban Hills Volcanic District (Central Italy): indications regarding
the role of volatiles in magmatic crystallization. Journal of
Volcanology and Geothermal Research 99, 179– 193.
Hart, S.R., Dunn, T., 1993. Experimental clinopyroxene/melt partitioning
of 24 trace elements. Contributions to Mineralogy and
Petrology 113, 1– 8.
Karner, D.B., Marra, F., Renne, P., 2001. The history of the Monti
Sabatini and Alban Hills Volcanoes: groundwork for assessing
volcanic-tectonic hazards for Rome. Journal of Volcanology and
Geothermal Research 107, 185–219.
Lee, W.J., Wyllie, P.J., 2000. The system CaO–MgO–SiO2–CO2
at 1 GPa, metasomatic wehrlites, and primary carbonatite
magmas. Contributions to Mineralogy and Petrology 138,
214– 228.
Lentz, D.R., 1999. Carbonatite genesis a reexamination of the role
of intrusion-related pneumatolytic skarn processes in limestone
melting. Geology 27, 335– 338.
Marra, F., Freda, C., Scarlato, P., Taddeucci, J., Karner, D.B.,
Renne, P., Gaeta, M., Palladino, D.M., Trigila, R., Cavarretta,
G., 2003. 40Ar/ 39Ar geochronology of the recent phase of
activity of the Alban Hills Volcanic District (Rome, Italy):
implications for seismic and volcanic hazards. Bulletin of Volcanology
65, 227– 247.
Marra, F., Taddeucci, J., Freda, C., Marzocchi, W., Scarlato, P.,
2004. Recurrence of volcanic activity along the Roman Comagmatic
Province (Tyrrhenian margin of Italy) and its tectonic
significance. Tectonics 43. doi:10.1029/2003TC001600.
Melzer, S., Foley, S.F., 2000. Phase relations and fractionation
sequences in potassic magmas series modelled in the system
CaMgSi2O6–KAlSiO4–Mg2SiO4–SiO2–F2O 1 at 1 bar to 18
kbar. Contributions to Mineralogy and Petrology 138, 186–197.
Mitchell, R.H., Bergman, S.C., 1991. Petrology of Lamproites.
Plenum, New York. 446 pp.
Morimoto, N., et al., 1988. Nomenclature of pyroxenes. Mineralogical
Magazine 52, 535– 550.
Nabelek, P.I., 1991. Stable isotope monitors. In: Kerrick, D.M.
(Ed.), Contact Metamorphism, vol. 26. Mineralogical Society
of America, Washington, DC, pp. 395–435.
Otto, J.W., Wyllie, P.J., 1993. Relationships between silicate melts
and carbonate-precipitating melts in CaO–MgO–SiO2–CO2–
H2O at 2 kbar. Mineralogy and Petrology 48, 343–365.
Palladino, D.M., Gaeta, M., Marra, F., 2001. A large k-foiditic
hydromagmatic eruption from the early activity of the Alban
Hills Volcanic District (Italy). Bulletin of Volcanology 63,
345– 359.
Peccerillo, A., 1985. Roman Comagmatic Province (Central Italy):
evidence for subduction-related magma genesis. Geology 13,
103– 106.
Peccerillo, A., 1999. Multiple mantle metasomatism in centralsouthern
Italy: geochemical effects, timing and geodynamic
implications. Geology 27, 315–318.
Peccerillo, A., 2001. Geochemistry and petrogenesis of quaternary
magmatism in central-southern Italy. Geochemistry International
6, 579– 592.
Peccerillo, A., Poli, G., Tolomeo, L., 1984. Genesis, evolution and
tectonics significance of K-rich volcanics from the Alban Hills
(Roman Comagmatic Region) as inferred from trace element
geochemistry. Contributions to Mineralogy and Petrology 86,
230– 240.
Perini, G., Francalanci, L., Davidson, J.P., Ponticelli, S., 2004.
Evolution and genesis of magmas from Vico Volcano, Central
Italy: multiple differentiation pathways and variable parental
magmas. Journal of Petrology 45, 139– 182.
Schmidt, K.H., Bottazzi, P., Vannucci, R., Mengel, K., 1999. Trace
element partitioning between phlogopite, clinopyroxene and
leucite lamproite melt. Earth and Planetary Science Letters
168, 287– 299.
Sottili, G., Palladino, D.M., Zanon, V., 2004. Plinian activity during
the early eruptive history of the Sabatini Volcanic District,
Central Italy. Journal of Volcanology and Geothermal Research
135, 361– 379.
Tiepolo, M., Bottazzi, P., Palenzona, M., Vannucci, R., 2003. A
laser probe coupled with ICP-double-focusing sector-field mass
spectrometer for in situ analysis of geological samples and U–
Pb dating of zircon. Canadian Mineralogist 41, 259–272.
Trigila, R., Gaeta, M., Freda, C., 1992. Indicazioni termodinamiche
e petrologico-sperimentali sull’origine ed evoluzione dei magmi
potassici dell’Italia centrale. Studi Geologici Camerti, Special
volume (1991/1992), CROP 11, 357-367.
Trigila, R., Agosta, E., Currado, C., De Benedetti, A.A., Freda, C.,
Gaeta, M., Palladino, D.M., Rosa, C., 1995. Petrology. In:
Trigila, R. (Ed.), The Volcano of the Alban Hills. Tipografia
S.G.S., Roma, pp. 95– 165.
Turekian, K.K., Wedepohl, K.H., 1961. Distribution of the elements
in some major units of the Earth’s crust. Geological Society of
America Bulletin 72, 175–182.
Turi, B., 1970. Carbon and oxygen isotopic composition of carbonates
in limestone blocks and related geodes from the bBlack
PozzolansQ formation of the Alban Hills. Chemical Geology 5,
195– 205.
van Achterbergh, E., Ryan, C.G., Jackson, S.E., Griffin, W.L., 2001.
Data reducing software for LA-ICP-MS. Mineralogical Association
of Canada, Short Course Series 29, 239–243.
Washington, H.S., 1906. The Roman Comagmatic Region. Carnegie
Institute Year Book 56, 206–214.
Watkinson, D.H., Wyllie, P.J., 1969. Phase equilibrium studies
bearing on the limestone-assimilation hypothesis. Geological
Society of America Bulletin 80, 1565– 1576.
Wood, B.J., Trigila, R., 2001. Experimental determination of aluminous clinopyroxenes-melt partition coefficients for potassic liquids, with application to the evolution of the Roman province potassic magmas. Chemical Geology 172, 213–223.
isotope ratios in some ejecta from the Alban Hills volcanic
area, Roman Comagmatic Region. Contributions to Mineralogy
and Petrology 51, 127– 133.
Beccaluva, L., Di Girolamo, P., Serri, G., 1991. Petrogenesis and
tectonic setting of the Roman Volcanic Province, Italy. Lithos
26, 191–221.
Beccaluva, L., Coltorti, M., Di Girolamo, P., Melluso, L., Dilani, L.,
Morra, V., Siena, F., 2002. Petrogenesis and evolution of Mt.
Vulture alcaline volcanism (Southern Italy). Mineralogy and
Petrology 74, 277– 297.
Bohrson, W.A., Spera, F.J., 2001. Energy-constrained open-system
magmatic processes II, application of energy-constrained assimilation–
fractional crystallization (EC-AFC) model to magmatic
systems. Journal of Petrology 42, 1019– 1041.
Chiarabba, C., Amato, A., Delaney, P.T., 1997. Crustal structure,
evolution, and volcanic unrest of the Alban Hills, Central Italy.
Bulletin of Volcanology 59, 161– 170.
Conticelli, S., Peccerillo, A., 1992. Petrology and geochemistry of
potassic and ultrapotassic volcanism in central Italy: petrogenesis
and inferences on the evolution of the mantle sources.
Lithos 28, 221– 240.
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.
Mineralogy and Petrology 74, 189– 222.
Dallai, L., Freda, C., Gaeta, M., 2004. Oxygen isotope
geochemistry of pyroclastic clinopyroxene monitors carbonate
contributions to Roman-type ultrapotassic magmas.
Contributions to Mineralogy and Petrology. doi:10.1007/
s00410-004-0602-2.
DePaolo, D.J., 1981. Trace element and isotopic effects of combined
wall-rock assimilation and fractional crystallization. Earth
and Planetary Science Letters 53, 189– 202.
De Rita, D., Funiciello, R., Parotto, M., 1988. Geological Map of
the Colli Albani Volcanic Complex. Progetto Finalizzato Geodinamica
CNR, Rome.
De Rita, D., Faccenna, C., Funiciello, R., Rosa, C., 1995. Stratigraphy
and volcano-tectonics. In: Trigila, R. (Ed.), The Volcano
of the Alban Hills. Universita` degli Studi di Roma bLa
SapienzaQ, Rome, Italy, pp. 33–71.
Di Battistini, G., Montanini, A., Vernia, L., Bargossi, G.M., Castorina,
F., 1998. Petrology and geochemistry of ultrapotassic rocks
from the Montefiascone Volcanic complex (Central Italy): magmatic
evolution and petrogenesis. Lithos 43, 169– 195.
Federico, M., Peccerillo, A., Barbieri, M., Wu, T.W., 1994. Mineralogical
and geochemical study of granular xenoliths from the
Alban Hills volcano, Central Italy: bearing on evolutionary
processes in potassic magma chambers. Contributions to Mineralogy
and Petrology 115, 384– 401.
Ferrara, G., Laurenzi, M.A., Taylor Jr., H.P., Tonarini, S., Turi, B.,
1985. Oxygen and strontium isotope studies of K-rich volcanic
rocks from the Alban Hills, Italy. Earth and Planetary Science
Letters 75, 13–28.
Ferrara, G., Preite-Martinez, M., Taylor Jr., H.P., Tonarini, S., Turi,
B., 1986. An oxygen and strontium isotope study of the M.
Vulsini volcanic area, Central Italy. Contributions to Mineralogy
and Petrology 92, 269–280.
Foley, S.F., 1992. Vein-plus-wall rock melting mechanisms in the
lithosphere and the origin of potassic rocks. Lithos 28, 435– 453.
Foley, S.F., Jenner, G.A., 2004. Trace element partitioning in lamproitic
magmas—the Gaussberg olivine leucitite. Lithos 75,
19– 38.
Foley, S.F., Venturelli, G., Green, D.H., Toscani, L., 1987. The
ultrapotassic rocks: characteristics, classification, and constraints
for petrogenetic models. Earth Sciences Review 24, 81– 134.
Foley, S.F., Jackson, S.E., Fryer, B.J., Greenough, J.D., Jenner,
G.A., 1996. Trace element partition coefficients for clinopyroxene
and phlogopite in an alkaline lamprophyre from Newfoundland
by LAM-ICP-MS. Geochimica et Cosmochimica
Acta 60, 629–638.
Fornaseri, M., Scherillo, A., Ventriglia, U., 1963. La regione vulcanica
dei Colli Albani. Vulcano Laziale. CNR, Rome, pp. 1– 561.
Franzini, M., Leoni, L., Saitta, M., 1972. A simple method to
evacuate the matrix effect in X-ray fluorescence analysis. Xray
Spectrometry 1, 151–154.
Freda, C., Gaeta, M., Palladino, D.M., Trigila, R., 1997. The Villa
Senni Eruption (Alban Hills, central Italy): the role of H2O and
CO2 on the magma chamber evolution and on the eruptive
scenario. Journal of Volcanology and Geothermal Research
78A, 103– 120.
Funiciello, R., Parotto, M., 1978. Il substrato sedimentario nell’area
dei Colli Albani: considerazioni geodinamiche e paleogeografiche
sul margine tirrenico dell’Appennino centrale. Geologica
Romana 17, 233–287.
Gaeta, M., 1996. Ca–Fe-rich exsolution lamellae from olivine in a
wehrlitic xenolith, Monti Vulsini volcanic district, Central Italy.
Mineralogica et Petrographica Acta 39, 159–167.
M. Gaeta et al. / Lithos 86 (2006) 330–346 345
Gaeta, M., Freda, C., 2001. Strontian fluoro-magnesiohastingsite in
Alban Hills lavas (Central Italy): crystallization conditions.
Mineralogical Magazine 65, 787–795.
Gaeta, M., Fabrizio, G., Cavarretta, G., 2000. F-phlogopites in the
Alban Hills Volcanic District (Central Italy): indications regarding
the role of volatiles in magmatic crystallization. Journal of
Volcanology and Geothermal Research 99, 179– 193.
Hart, S.R., Dunn, T., 1993. Experimental clinopyroxene/melt partitioning
of 24 trace elements. Contributions to Mineralogy and
Petrology 113, 1– 8.
Karner, D.B., Marra, F., Renne, P., 2001. The history of the Monti
Sabatini and Alban Hills Volcanoes: groundwork for assessing
volcanic-tectonic hazards for Rome. Journal of Volcanology and
Geothermal Research 107, 185–219.
Lee, W.J., Wyllie, P.J., 2000. The system CaO–MgO–SiO2–CO2
at 1 GPa, metasomatic wehrlites, and primary carbonatite
magmas. Contributions to Mineralogy and Petrology 138,
214– 228.
Lentz, D.R., 1999. Carbonatite genesis a reexamination of the role
of intrusion-related pneumatolytic skarn processes in limestone
melting. Geology 27, 335– 338.
Marra, F., Freda, C., Scarlato, P., Taddeucci, J., Karner, D.B.,
Renne, P., Gaeta, M., Palladino, D.M., Trigila, R., Cavarretta,
G., 2003. 40Ar/ 39Ar geochronology of the recent phase of
activity of the Alban Hills Volcanic District (Rome, Italy):
implications for seismic and volcanic hazards. Bulletin of Volcanology
65, 227– 247.
Marra, F., Taddeucci, J., Freda, C., Marzocchi, W., Scarlato, P.,
2004. Recurrence of volcanic activity along the Roman Comagmatic
Province (Tyrrhenian margin of Italy) and its tectonic
significance. Tectonics 43. doi:10.1029/2003TC001600.
Melzer, S., Foley, S.F., 2000. Phase relations and fractionation
sequences in potassic magmas series modelled in the system
CaMgSi2O6–KAlSiO4–Mg2SiO4–SiO2–F2O 1 at 1 bar to 18
kbar. Contributions to Mineralogy and Petrology 138, 186–197.
Mitchell, R.H., Bergman, S.C., 1991. Petrology of Lamproites.
Plenum, New York. 446 pp.
Morimoto, N., et al., 1988. Nomenclature of pyroxenes. Mineralogical
Magazine 52, 535– 550.
Nabelek, P.I., 1991. Stable isotope monitors. In: Kerrick, D.M.
(Ed.), Contact Metamorphism, vol. 26. Mineralogical Society
of America, Washington, DC, pp. 395–435.
Otto, J.W., Wyllie, P.J., 1993. Relationships between silicate melts
and carbonate-precipitating melts in CaO–MgO–SiO2–CO2–
H2O at 2 kbar. Mineralogy and Petrology 48, 343–365.
Palladino, D.M., Gaeta, M., Marra, F., 2001. A large k-foiditic
hydromagmatic eruption from the early activity of the Alban
Hills Volcanic District (Italy). Bulletin of Volcanology 63,
345– 359.
Peccerillo, A., 1985. Roman Comagmatic Province (Central Italy):
evidence for subduction-related magma genesis. Geology 13,
103– 106.
Peccerillo, A., 1999. Multiple mantle metasomatism in centralsouthern
Italy: geochemical effects, timing and geodynamic
implications. Geology 27, 315–318.
Peccerillo, A., 2001. Geochemistry and petrogenesis of quaternary
magmatism in central-southern Italy. Geochemistry International
6, 579– 592.
Peccerillo, A., Poli, G., Tolomeo, L., 1984. Genesis, evolution and
tectonics significance of K-rich volcanics from the Alban Hills
(Roman Comagmatic Region) as inferred from trace element
geochemistry. Contributions to Mineralogy and Petrology 86,
230– 240.
Perini, G., Francalanci, L., Davidson, J.P., Ponticelli, S., 2004.
Evolution and genesis of magmas from Vico Volcano, Central
Italy: multiple differentiation pathways and variable parental
magmas. Journal of Petrology 45, 139– 182.
Schmidt, K.H., Bottazzi, P., Vannucci, R., Mengel, K., 1999. Trace
element partitioning between phlogopite, clinopyroxene and
leucite lamproite melt. Earth and Planetary Science Letters
168, 287– 299.
Sottili, G., Palladino, D.M., Zanon, V., 2004. Plinian activity during
the early eruptive history of the Sabatini Volcanic District,
Central Italy. Journal of Volcanology and Geothermal Research
135, 361– 379.
Tiepolo, M., Bottazzi, P., Palenzona, M., Vannucci, R., 2003. A
laser probe coupled with ICP-double-focusing sector-field mass
spectrometer for in situ analysis of geological samples and U–
Pb dating of zircon. Canadian Mineralogist 41, 259–272.
Trigila, R., Gaeta, M., Freda, C., 1992. Indicazioni termodinamiche
e petrologico-sperimentali sull’origine ed evoluzione dei magmi
potassici dell’Italia centrale. Studi Geologici Camerti, Special
volume (1991/1992), CROP 11, 357-367.
Trigila, R., Agosta, E., Currado, C., De Benedetti, A.A., Freda, C.,
Gaeta, M., Palladino, D.M., Rosa, C., 1995. Petrology. In:
Trigila, R. (Ed.), The Volcano of the Alban Hills. Tipografia
S.G.S., Roma, pp. 95– 165.
Turekian, K.K., Wedepohl, K.H., 1961. Distribution of the elements
in some major units of the Earth’s crust. Geological Society of
America Bulletin 72, 175–182.
Turi, B., 1970. Carbon and oxygen isotopic composition of carbonates
in limestone blocks and related geodes from the bBlack
PozzolansQ formation of the Alban Hills. Chemical Geology 5,
195– 205.
van Achterbergh, E., Ryan, C.G., Jackson, S.E., Griffin, W.L., 2001.
Data reducing software for LA-ICP-MS. Mineralogical Association
of Canada, Short Course Series 29, 239–243.
Washington, H.S., 1906. The Roman Comagmatic Region. Carnegie
Institute Year Book 56, 206–214.
Watkinson, D.H., Wyllie, P.J., 1969. Phase equilibrium studies
bearing on the limestone-assimilation hypothesis. Geological
Society of America Bulletin 80, 1565– 1576.
Wood, B.J., Trigila, R., 2001. Experimental determination of aluminous clinopyroxenes-melt partition coefficients for potassic liquids, with application to the evolution of the Roman province potassic magmas. Chemical Geology 172, 213–223.
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