Mesozoic ophiolite relies in the Southern Steep Belt of the Central Alps

Andreas Stucki; Daniela Rubatto; Volkmar Trommsdorff

Mesozoic ophiolite relies in the Southern Steep Belt of the Central Alps

Andreas Stucki^*, Daniela Rubatto, Volkmar Trommsdorff

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

26 Citations (Scopus)

Abstract

SHRIMP U/Pb age determinations on plagiogranite zircons in the Zone of Bellinzona-Dascio ophiolites yield late Jurassic ages of 149 ± 3 Ma and 142 ± 5 Ma. The plagiogranites are part of a rodingitized and metamorphosed yet well preserved igneous oceanic suite including Mg-gabbros, Fe-Ti-rich gabbros and basalts that is a common feature of the Jurassic Piemont-Ligurian ophiolites. These magmatic ages are among the youngest in this domain and fit well with the observed N-MORB signature of the basalts. The data are indicative of formation in a relatively mature Piemont-Ligurian ocean rather than in an early, embryonic Valaisan ocean.

Original language	English
Pages (from-to)	285-299
Number of pages	15
Journal	Schweizerische Mineralogische und Petrographische Mitteilungen
Volume	83
Issue number	3
Publication status	Published - 2003

Cite this

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title = "Mesozoic ophiolite relies in the Southern Steep Belt of the Central Alps",

abstract = "SHRIMP U/Pb age determinations on plagiogranite zircons in the Zone of Bellinzona-Dascio ophiolites yield late Jurassic ages of 149 ± 3 Ma and 142 ± 5 Ma. The plagiogranites are part of a rodingitized and metamorphosed yet well preserved igneous oceanic suite including Mg-gabbros, Fe-Ti-rich gabbros and basalts that is a common feature of the Jurassic Piemont-Ligurian ophiolites. These magmatic ages are among the youngest in this domain and fit well with the observed N-MORB signature of the basalts. The data are indicative of formation in a relatively mature Piemont-Ligurian ocean rather than in an early, embryonic Valaisan ocean.",

keywords = "Central Alps, Ophiolites, Piemont-Ligurian ocean, Plagiogranites, Southern Steep Belt, U/Pb dating, Zircon, Zone of Bellinzona-Dascio",

author = "Andreas Stucki and Daniela Rubatto and Volkmar Trommsdorff",

year = "2003",

language = "English",

volume = "83",

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journal = "Schweizerische Mineralogische und Petrographische Mitteilungen",

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publisher = "Staeubi Verlag AG",

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TY - JOUR

T1 - Mesozoic ophiolite relies in the Southern Steep Belt of the Central Alps

AU - Stucki, Andreas

AU - Rubatto, Daniela

AU - Trommsdorff, Volkmar

PY - 2003

Y1 - 2003

N2 - SHRIMP U/Pb age determinations on plagiogranite zircons in the Zone of Bellinzona-Dascio ophiolites yield late Jurassic ages of 149 ± 3 Ma and 142 ± 5 Ma. The plagiogranites are part of a rodingitized and metamorphosed yet well preserved igneous oceanic suite including Mg-gabbros, Fe-Ti-rich gabbros and basalts that is a common feature of the Jurassic Piemont-Ligurian ophiolites. These magmatic ages are among the youngest in this domain and fit well with the observed N-MORB signature of the basalts. The data are indicative of formation in a relatively mature Piemont-Ligurian ocean rather than in an early, embryonic Valaisan ocean.

AB - SHRIMP U/Pb age determinations on plagiogranite zircons in the Zone of Bellinzona-Dascio ophiolites yield late Jurassic ages of 149 ± 3 Ma and 142 ± 5 Ma. The plagiogranites are part of a rodingitized and metamorphosed yet well preserved igneous oceanic suite including Mg-gabbros, Fe-Ti-rich gabbros and basalts that is a common feature of the Jurassic Piemont-Ligurian ophiolites. These magmatic ages are among the youngest in this domain and fit well with the observed N-MORB signature of the basalts. The data are indicative of formation in a relatively mature Piemont-Ligurian ocean rather than in an early, embryonic Valaisan ocean.

KW - Central Alps

KW - Ophiolites

KW - Piemont-Ligurian ocean

KW - Plagiogranites

KW - Southern Steep Belt

KW - U/Pb dating

KW - Zircon

KW - Zone of Bellinzona-Dascio

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M3 - Article

SN - 0036-7699

VL - 83

SP - 285

EP - 299

JO - Schweizerische Mineralogische und Petrographische Mitteilungen

JF - Schweizerische Mineralogische und Petrographische Mitteilungen

IS - 3

ER -

Mesozoic ophiolite relies in the Southern Steep Belt of the Central Alps

Abstract

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