Strontium-isotope composition in the Tethys Sea, Euboea, Greece

Tremba, Edward Louis; Faure, Gunter; Katsikatsos, G.; Summerson, Charles Henry

doi:10.1016/0009-2541(75)90003-0

Cited by 25 publications

(8 citation statements)

References 5 publications

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“…In addition. the data of Tremba et al (1975) reinforced the conclusion expressed by Peterman et crl. (1970) that strontium in the open oceans was isotopically homogeneous at any given instant during Phanerozoic time.…”

supporting

confidence: 83%

“…The carbonate rocks analysed in this study were selected for their low noncarbonate residues in order to minimize the effect of radiogenic s7Sr leached from clay minerals on the measured R7Sr/a6S~ ratios of the carbonate phases (Tremba et al, 1975;Clauer, 1973). Most of the samples have residue concentrations of less than 10% and only four contain more than 20"/, of non-carbonate material.…”

Section: Variation Of 8 7 S R / 8 6 S~ Ratiosmentioning

confidence: 99%

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Strontium isotope composition of marine carbonates of Middle Triassic to Early Jurassic age, Lombardic Alps, Italy*

1978

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The s7Sr/R6Sr ratios and strontium concentrations for thirty-three samples of marine carbonate rocks of Middle Triassic to Early Jurassic age have been determined. The samples were collected from four measured sections in the areas of Val Camonica in northern Italy. The strontium concentrations vary from 40 to 7000 ppm. Most of the samples are calcitic limestones containing less than 10% of non-carbonate residues. Dolomitic samples and those containing appreciable non-carbonate residues have significantly diminished strontium concentrations.The n7Sr/R6Sr ratios of the carbonate phases of these rocks appear to be unaffected by dolomitization and by the presence of non-carbonate minerals. The average a'Sr/a6Sr ratios of the formations vary systematically in a stratigraphic sense. The ratio increased from Early Anisian to Early-Middle Ladinian, declined during Late Ladinian and Carnian, rose again during the Norian and then declined throughout the Late Norian (Rhaetian), Hettangian, Sinemurian and Pliensbachian ages. The average B'Sr/s6Sr ratios, relative to 0.7080 for the Eimer and Amendstandard,are: Anisian:0.70805f 0.00019;Early Ladinian:0,7085+0.00038;Late Ladinian: 0.70791 +0.00013; Carnian: 0~70776+0~00015; Norian and Rhaetian: 0,70791 .+ 040014; Hettangian: 0~70762+0~00021 : Sinemurian: 0.7070&0-00038; Pliensbachian: 0.7070+ 0.00015. These variations reflect changes in the isotopic composition of Sr entering the oceans in early Mesozoic time due to varying rates of weathering and erosion of young volcanic rocks (low 87Sr/e6Sr) and old granitic rocks (high s7Sr/asSr). The data presented in this report contribute to a growing body of information regarding the changes that have occurred in the g7Sr/68Sr ratio of the oceans in Phanerozoic time.

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supporting

confidence: 83%

Section: Variation Of 8 7 S R / 8 6 S~ Ratiosmentioning

confidence: 99%

Strontium isotope composition of marine carbonates of Middle Triassic to Early Jurassic age, Lombardic Alps, Italy*

1978

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“…Thick ultra-mafic lenses are included in the lower parts of this unit. The upper part of the marbles gave a late Cretaceous age and suggest a Mesozoic age for the whole unit is suggested (Tembra et al 1975). The paragenesis of glaucophane, lawsonite and epidote found within mica schists from the unit indicate an origin in the low temperature blueschists facies at 300° °C and 8 kbars (Bonneau & Kienast 1982).…”

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confidence: 83%

Tectonic evolution and stress field of the Kymi-Aliveri basin, Evia island, Greece

Κοκκάλας¹

2001

geosociety

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Stress and strain analysis has been used to reconstruct the post-Oligocene geodynamics of the Kymi-Aliveri basin: The Kymi-Aliveri basin occupies the footwall of the Kymi-Thrust, which formed during the Middle Miocene as a large transpressional structure in the late orogenic stages of the Hellenides. Subsequently, in the Upper Miocene the shape of the basin was strongly modified by an orthogonal system of NE and NW trending normal faults as a result of post orogenic collapse. In the Pliocene and Pleistocene time the basin is a part of the back arc basin, which developed behind the Hellenic Arc. WNW trending normal faults and reactivated faults characterized this tectonic phase.

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“…The 87 Sr/ 86 Sr values of the studied samples fall within the interval 0.707334–0.707522 (±1 × 10 −5 − 4.9 × 10 −5 ), in agreement with values reported for other Late Cretaceous marine carbonate rocks (Peterman et al . 1970; Tremba et al . 1975; McArthur et al .…”

Section: Sr/86sr Compositionmentioning

confidence: 99%

A Multidisciplinary Approach to the Characterization of Roman Gravestones From Aquileia (Udine, Italy)*

2003

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The results of an archaeometric study on gravestone production in Aquileia (northeastern Italy) during Roman Republican times are reported here. The artefacts are made of limestone, quarried from the sedimentary sequence of the Trieste Karst (Carnican Alps, northeastern Italy), as testified by historical sources which refer to the ‘Roman Quarry’ at Aurisina. The rock types used for the gravestones are petrographically, geochemically and geochronologically homogeneous, and display similar faunal assemblages. In addition, their age is restricted to the Santonian – Lower Campanian. Comparisons between archaeological finds and rock specimens from various active and inactive quarries in this area suggest that quarrying during Roman Republican times was limited to a specific stratigraphic horizon of the sedimentary sequence, corresponding to the higher part of the ‘Roman Quarry’.

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Strontium-isotope composition in the Tethys Sea, Euboea, Greece

Cited by 25 publications

References 5 publications

Strontium isotope composition of marine carbonates of Middle Triassic to Early Jurassic age, Lombardic Alps, Italy*

Strontium isotope composition of marine carbonates of Middle Triassic to Early Jurassic age, Lombardic Alps, Italy*

Tectonic evolution and stress field of the Kymi-Aliveri basin, Evia island, Greece

A Multidisciplinary Approach to the Characterization of Roman Gravestones From Aquileia (Udine, Italy)*

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