Appendix A. Tables

Table A.1. Selected radiometric data on emplacement age of acidic and basic metamorphic rocks from the Variscan Belt of Sardinia

Rock-type/Locality Mineral/whole rock Method Age (Ma) Reference

* recalculated by Beccaluva et al. (1985).
Orthogneiss Capo Spartivento whole rock Rb/Sr isochron 427±33* Cocozza et al. (1977)
  zircon U-Pb 478±16 Delaperrière and Lancelot (1989)
Augen gneiss Lodé whole rock Rb/Sr 441±33 Ferrara et al. (1978)
Orthogneiss Lodé whole rock Rb/Sr isochron 458±31* Di Simplicio et al. (1974)
  zircon U-Pb LA-ICPMS 456±14 Helbing and Tiepolo (2005)
Orthogneiss Tanaunella zircon U-Pb LA-ICPMS 458±7 Helbing and Tiepolo (2005)
Porphyroid Lula zircon U-Pb LA-ICPMS 474±13 Helbing and Tiepolo (2005)
Metadacites Sulcis zircon U-Pb 475±10 Garbarino et al. (2005)
Metarhyodacites Sulcis zircon U-Pb 387±2 Garbarino et al. (2005)
Amphibolite Posada -Asinara whole rock Sm/Nd 957±93 Cappelli et al. (1992)
Retrogressed eclogite Punta de li Tulchi zircon core SHRIMP U-Pb 453±14 Palmeri et al. (2004)
Eclogite NE Sardinia zircon U-Pb 457±2 Cortesogno et al. (2004)
Partially overprinted eclogite - Golfo Aranci zircon U-Pb LA-ICPMS 460±5 Giacomini et al. (2005a)
Amphibole migmatite zircon Pb-Pb 461±12 Cruciani et al. (2003)

Table A.2. Selected metamorphic age, based on radiometric data, from acidic, basic, and pelitic rocks in the Variscan Belt of Sardinia

Rock-type/Locality Mineral/whole rock Method Age (Ma) Interpretation Reference
Orthogneiss Lodé Pl, Kfs, Bt Rb/Sr isochron 294 cooling age Di Simplicio et al. (1974)
  Pl, Kfs, Bt Rb/Sr isochron 298 cooling age Di Simplicio et al. (1974)
  Bt K/Ar 289±9 cooling age Ferrara et al. (1978)
  Bt K/Ar 319±10 cooling age Ferrara et al. (1978)
Augen gneiss Lodé Kfs, Ms, Bt Rb/Sr 306±10 cooling age Ferrara et al. (1978)
  Ms K/Ar 315±10 cooling age Ferrara et al. (1978)
  Ms K/Ar 306±9 cooling age Ferrara et al. (1978)
  Bt K/Ar 304±9 cooling age Ferrara et al. (1978)
  Bt K/Ar 284±9 cooling age Ferrara et al. (1978)
Banded migmatite NW Torpè whole rock Rb/Sr 344±7 climax of metamorphism Ferrara et al. (1978)
  Bt, whole rock Rb/Sr 298±2 banded migmatite passed above 300° C Ferrara et al. (1978)
Micaschist Giuncana Tungoni Ms Rb/Sr 350±16 amphibolite facies of axial zone Del Moro et al. (1991)
  Ms Rb/Sr 336±8 amphibolite facies metamorphism Del Moro et al. (1991)
  Bt Rb/Sr 316±5 cooling age Del Moro et al. (1991)
  Bt Rb/Sr 310±5 cooling age Del Moro et al. (1991)
  Pl Ar/Ar <310 cooling age Del Moro et al. (1991)
  Pl Ar/Ar <321 cooling age Del Moro et al. (1991)
Micaschist Anglona Ms Rb/Sr 303±3 reopening of ther Rb/Sr Del Moro et al. (1991)
  Bt Rb/Sr 277±4 ? Del Moro et al. (1991)
  Bt Rb/Sr 281±4 ? Del Moro et al. (1991)
Micaschist NE Sardinia (grt zone) syn-D 1 white mica In situ Ar/Ar laser c.a 340-315 older age: maximum thickening in the Internal Nappes, D1 stage younger age: end of chemical reequilibration of white mica during the D 2 stage Di Vincenzo et al. (2004)
Augen gneiss (grt zone) white mica   310-290   Di Vincenzo et al. (2004)
Micashist (st+bt zone) syn-D 2 white mica   320-310   Di Vincenzo et al. (2004)
Migmatite (Kfs+ Sil zone) white mica   320-300   Di Vincenzo et al. (2004)
Orthogneiss (Kfs+ Sil zone) white mica   320-300   Di Vincenzo et al. (2004)
Metagabbro- Nurra Act Ar/Ar 345±4 greenschist facies of nappe domain Del Moro et al. (1991)
Amphibolite- Golfo Aranci Hbl K/Ar 281-302 cooling age Di Simplicio et al. (1974)
Amphibolite- Torpè Hbl K/Ar 282-320 cooling age Di Simplicio et al. (1974)
Retrogressed eclogite Pta de li Tulchi single Zrn interior SHRIMP U-Pb 400±10 eclogite facies metamorphism / Pb-loss Palmeri et al. (2004)
  single Zrn rim SHRIMP U-Pb 327±7 main Variscan collisional event Palmeri et al. (2004)
Eclogite NE Sardinia Zrn U-Pb 403±4 zircon crystallizzation during high-grade event Cortesogno et al. (2004)
Amphibolitised eclogite Golfo Aranci Zrn U-Pb LA-ICPMS 352±3 eclogitic or post-eclogitic metamorphic equilibration Giacomini et al. (2005a)

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