Schiavi, Federica et al. (2011) Trace element and Pb–B–Li isotope systematics of olivine-hosted melt inclusions: insights into source metasomatism beneath Stromboli (southern Italy), Contributions to Mineralogy and Petrology, 163, doi: 10.1007/s00410-011-0713-5. < 20200225102214-755085 > pub

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  • abstract:

    We studied the elemental and isotopic (Pb, B and Li isotopes) composition of melt inclusions hosted in highly forsteritic (Fo83–91) olivines that were collected from San Bartolo lava and pumice (ST79p, ST82p and ST531p) samples erupted by Stromboli in historical times. The studied melt inclusions have primitive calcalkaline to shoshonitic basaltic compositions. They cover a compositional range far wider than that exhibited by the whole-rocks and differ in key trace element ratios. San Bartolo melt inclusions are characterized by lower incompatible trace element abundances, higher ratios between fluid-mobile (B, Pb, U and LILE) and less fluid-mobile (REE, Th, HFSE) elements and lower La/Yb ratios relative to the pumice-hosted melt inclusions and pumiceous melts erupted during paroxysmal events. Trace elements, along with different Pb, B and Li isotopic signatures, attest to source heterogeneity on the small scale and provide new insights into subducted components beneath Stromboli. Results of a mixing model suggest that metasomatism of the mantle source of pumice-hosted melt inclusions was driven by solute-rich high-pressure fluids (11B (−8.6 to −13.7‰) and δ7Li (+2.3 to −1.7‰) indicates that high-pressure liquids were released in variable proportions from highly dehydrated metabasalts and metasediments. On the other hand, the elemental and isotopic (δ11B ~ −1.9 to −5.9‰) composition of San Bartolo melt inclusions is better explained by the addition of a prevalent aqueous component (~2 to 4%) escaped at shallower depths from sediments and altered basaltic crust in almost equivalent proportions, with a smaller contribution by high-pressure fluids. Owing to the high-angle dip of the subducted cold Ionian slab, aqueous fluids and high-pressure fluids would rise through the mantle wedge and locally superimpose on each other, thus giving origin to variously metasomatized mantle domains.

  • doi: 10.1007/s00410-011-0713-5
  • modified at 17 h ago


(a) SEM-EDX on SEM-EDX 3100H with HORIBA EMAX
(b) EPMA on EPMA


(a) Q-ICP-MS_procedures of Makishima and Nakamura (1997, 1999, 2006) on Q-ICPMS Agilent 7500cs
(b) SIMS on SIMS Cameca ims-5f


(a) EPMA on EPMA


(a) SEM-EDX on SEM-EDX 3100H with HORIBA EMAX
Tixhr728136614 thumb ST82 < 20180305141806-920207 >pub
  • classification: volcanic:basaltic
  • physical-form: aliquot
  • quantity (g): 1.65
  • description: Stromboli island; eruption time after 3rd to 7th century AD; pumice.
  • modified at 2020-04-10
Tixhr1325357757 thumb ST103 < 20180305113432-690138 >pub
  • classification: volcanic:basaltic
  • physical-form: hand specimen
  • quantity (g): 89.23
  • description: Stromboli island; San Bartolo effusive event between 360BC and 7AD. Sample set ST94.8 consists of melt inclusions hosted in olivine crystals recovered from lava sample ST103 (Schiavi et al., 2012)
  • modified at 2020-04-10
Tixhr 1352674651 thumb ST79 < 20180305142033-692509 >pub
  • classification: volcanic:basaltic
  • physical-form: aliquot
  • quantity (g): 1.47
  • description: Stromboli island; eruption time after 3rd to 7th century AD; pumice.
  • modified at 2020-04-10
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name spots global-id
caption ID assembly stone
Table 1S(b). Major element compositions of olivine-hosted melt inclusions from San Bartolo lava pub 20200226095646-779883 major-MIs (Schiavi et al., 2012) 10
Table 2S(b). Major element compositions of olivine-hosted melt inclusions from pumice samples pub 20200226104435-699166 major-MIs (Schiavi et al., 2012) 11
Table 2S(a). Major element compositions of olivine grains from pumice samples pub 20200226102333-675017 major-Ol (Schiavi et al., 2012) 11
Table 1 Trace element composition of San Bartolo lava and olivine-hosted melt inclusions pub 20200225142804-312780 trace (Schiavi et al., 2012) 13
Table 1S. Major element compositions of San Bartolo lava pub 20200226100927-652711 major (Schiavi et al., 2012) 1
Table 2 Pb, B and Li isotopic compositions of olivine-hosted melt inclusions pub 20200225151544-135501 Li-B-Pb (Schiavi et al., 2012) 18
Table 1S(a). Major element compositions of olivine grains from San Bartolo lava pub 20200226101942-797330 major-Ol (Schiavi et al., 2012) 10
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  • name
  • Schiavi, Federica
  • Kobayashi, Katsura
  • Nakamura, Eizo
  • Tiepolo, Massimo
  • Vannucci, Riccardo