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147 results on '"Cirilli, S."'

59. The Prati di Stuores Stuores Wiesen Section (Dolomites, Italy): A candidate global stratotype section and point for the base of the Carnian stage

Author

Loriga, Cb, Cirilli, S., Zanche, V., Di Bari, D., Piero Gianolla, Laghi, Gf, Lowrie, W., Manfrin, S., Mastandrea, A., Mietto, P., Muttoni, G., Neri, C., Posenato, R., Rechichi, M., Rettori, R., and Roghi, G.

Subjects
Carnian, Bivalves, Sequ ence stratigraphy, Magnetostratigraphy, Ammonoids, Conodonts, Microcrinoids, Biostratigraphy, Gas tropods, Holothurians, Brachiopods, Palynomorphs, Dolomites, Foraminifers, Southern Alps
Published
1999

63. PALAEOENVIRONMENTAL INTERPPRETATION OF THE LATE TRIASSIC FRAELE FORMATION (ORTLES NAPPE, AUSTROALPINE DOMAIN, LOMBARDY)

Author

fabrizio berra and Cirilli, S.

Subjects
lcsh:Geology, lcsh:Paleontology, lcsh:QE1-996.5, lcsh:QE701-760
Abstract

The Fraele Formation crops out in the Ortles Nappe (upper Valtellina, Northern Italy), structurally part of the Central Austroalpine Domain. It consists of fine siliciclastics alternating with carbonates, mostly limestones,rare dolostones and marls. The formation differs lithologically from the underlying Norian Dolomia del Cristallo because of different paleonvironmental evolution.The change in environmental parameters was controlled mainly by a climatic change to more humid conditions.This favoured on one hand the mobilisation and trasport by rivers of siliciclastic material from the continent to the Tethys gulf,and on the other influenced the sea-water chemistry.Freshwater influxes lowered salinity and inhibited early dolomitisation. Input of low density freshwater resulted in the astablishment of a permanent water mass stratification which influenced the benthic life. This paleoenvironmental reconstruction fits with the sudden clastic input which occurred in several palaeogeographic domains of the western Tethys realm (Austroalpine, Southalpine, Apennine, Hungary, Poland, Slovakia) during the Late Norian., Rivista italiana di Paleontologia e Stratigrafia, Vol 103, No 1

Published
1997
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64. Upper Triassic reefal facies in E Sulawesi, Indonesia

Author

Martini, Rossana, Vachard, D., Zaninetti, Louisette, Cirilli, S., Cornée, Jean-Jacques, Lathuilière, B., and Villeneuve, M.

Subjects
Sulawesi, Indonesia, Foraminifers, ddc:550, Upper Triassic, Carbonates, Reefs
Published
1996

65. Site-Sensitive Gas Sensing and Analyte Discrimination in Langmuir−Blodgett Porphyrin Films

Author

Bussetti, G., primary, Violante, A., additional, Yivlialin, R., additional, Cirilli, S., additional, Bonanni, B., additional, Chiaradia, P., additional, Goletti, C., additional, Tortora, L., additional, Paolesse, R., additional, Martinelli, E., additional, D’Amico, A., additional, Di Natale, C., additional, Giancane, G., additional, and Valli, L., additional

Published
2011
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66. Coexistence of Negatively and Positively Buckled Isomers onn+-DopedSi(111)−2×1

Author

Bussetti, G., primary, Bonanni, B., additional, Cirilli, S., additional, Violante, A., additional, Russo, M., additional, Goletti, C., additional, Chiaradia, P., additional, Pulci, O., additional, Palummo, M., additional, Del Sole, R., additional, Gargiani, P., additional, Betti, M. G., additional, Mariani, C., additional, Feenstra, R. M., additional, Meyer, G., additional, and Rieder, K. H., additional

Published
2011
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71. A Dominant Tectonic Signal in High-Frequency, Peritidal Carbonate Cycles? A Regional Analysis of Liassic Platforms from Western Tethys

Author

Bosence, D., primary, Procter, E., additional, Aurell, M., additional, Bel Kahla, A., additional, Boudagher-Fadel, M., additional, Casaglia, F., additional, Cirilli, S., additional, Mehdie, M., additional, Nieto, L., additional, Rey, J., additional, Scherreiks, R., additional, Soussi, M., additional, and Waltham, D., additional

Published
2009
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94. Biosedimentology of microbial buildups IGCP project no. 380 proceedings of 2nd meeting, Göttingen/Germany 1996

Author

Neuweiler, F., Reitner, J., Monty, C., Feldmann, M., Awramik, S. M., Bourque, P. -A, Cirilli, S., Gautret, P., Marcoux, J., Plaziat, J. C., Défarge, C., Trichet, J., James Pinckney, Bertrand-Sarfati, J., Moussine-Pouchkine, A., Reid, P., Merz-Preiß, M., Labiaux, S., Baud, A., Thiel, V., Michaelis, W., Galling, U., Mäcker, H., Arp, G., Krutschinna, J., Riding, R., Webb, G. E., Jell, J. S., Freiwald, A., Mohanti, M., Das, S., Bergbauer, M., Schumann-Kindel, G., Manz, W., and Szewzyk, U.

99. Reply to Narkiewicz (2017) comment on 'Thermal evolution of Paleozoic successions of the Holy Cross Mountains (Poland)'

Author

Andrea Schito, Bruno Valentim, Domenico Grigo, Luca Aldega, Chiara Caricchi, Simonetta Cirilli, Matteo Trolese, Alexandra Guedes, Sveva Corrado, Amalia Spina, Schito, A., Corrado, S., Trolese, M., Aldega, L., Caricchi, C., Cirilli, S., Grigo, D., Guedes, A., Spina, A., and Valentim, B.

Subjects
010506 paleontology, Holy Cross Mountains, Paleozoic, Stratigraphy, Holy Cross mountains, Paleozoic source rocks, sedimentary basins, thermal modelling, oceanography, geophysics, geology, economic geology, stratigraphy, Fault (geology), 010502 geochemistry & geophysics, Oceanography, 01 natural sciences, Paleontology, Sedimentary basins, Thermal, Economic geology, Geophysic, 0105 earth and related environmental sciences, geography, Thermal modelling, Sedimentary basins, Paleozoic source rocks, Holy Cross Mountains, geography.geographical_feature_category, Paleozoic source rock, Geology, Sedimentary basin, Holy Cross Mountain, Geophysics, Thermal modelling, Economic Geology, Heat flow
Abstract

In this paper we reply to the criticisms advanced by Narkiewicz (2017) on the paper by Schito et al. (2017). We clarify the issues related to the stratigraphic and thermal maturity constraints used for reconstructing burial and thermal models of the two blocks of the Holy Cross Mountains. We also show how geological evidences brought by Narkiewicz (2017) as a proof of elevated Variscan heat flow are not conclusive or at least suggest the occurence of a localized thermal anomaly only along the area of the Holy Cross Fault. In the end, we performed new burial and thermal models in the Kielce region demonstrating that stratigraphic thickness variations between Schito et al. (2017) and Narkiewicz et al. (2010) produce only negligible differences in levels of thermal maturity of Paleozoic rocks. In addition, we outline that levels of thermal maturity for Silurian rocks can be matched only by using constant heat flow values through the Paleozoic and point to a decisive role for the absence of regional high Variscan heat flow in the area.

Published
2017

100. 40Ar/39Ar ages of CAMP in North America: Implications for the Triassic–Jurassic boundary and the 40K decay constant bias

Author

Jourdan, F., Marzoli, A., Bertrand, H., Cirilli, S., Tanner, L.H., Kontak, D.J., McHone, G., Renne, P.R., and Bellieni, G.

Subjects
*ARGON isotopes, *POTASSIUM isotopes, *TRIASSIC stratigraphic geology, *JURASSIC stratigraphic geology, *MAGMAS, *GEOLOGICAL time scales, *RADIOACTIVE decay
Abstract

Abstract: The Central Atlantic magmatic province (CAMP) is one of the largest igneous provinces on Earth (>107 km2), spanning four continents. Recent high-precision 40Ar/39Ar dating of mineral separates has provided important constraints on the age, duration, and geodynamic history of CAMP. Yet the North American CAMP is strikingly under-represented in this dating effort. Here we present 13 new statistically robust plateau, mini-plateau and isochron ages obtained on plagioclase and sericite separates from lava flows from the Fundy (n =10; Nova Scotia, Canada), Hartford and Deerfield (n =3; U.S.A.) basins. Ages mostly range from 198.6±1.1 to 201.0±1.4 Ma (2σ), with 1 date substantially younger at 190.6±1.0 Ma. Careful statistical regression shows that ages from the upper (199.7.0±1.5 Ma) and bottom (200.1±0.9 Ma) units of the lava pile in the Fundy basin are statistically indistinguishable, confirming a short duration of emplacement (≪1.6 Ma; ≤1 Ma). Three ages obtained on the Hartford (198.6±2.0 Ma and 199.8±1.1 Ma) and Deerfield (199.3±1.2 Ma) basins were measured on sericite from the upper lava flow units. We interpret these dates as reflecting syn-emplacement hydrothermal activity within these units. Collectively, CAMP ages gathered so far suggest a short duration of the main magmatic activity (2–3 Ma), but also suggest the possibility of a temporal migration of the active magmatic centers from north to south. Such a migration challenges a plume model that would postulate a radial outward migration of the magmatism and is more compatible with other models, such as the supercontinent global warming hypothesis. When compared to the age of the Triassic–Jurassic boundary, the filtered CAMP age database suggests that the onset of the magmatic activity precedes the limit by at least few hundred thousand years, thereby suggesting a causal relationship between CAMP and the end of Triassic mass extinction. An age at 191 Ma possibly suggests a minor CAMP late tailing activity (190–194 Ma) which has been observed already for dykes and sills in Africa and Brazil. We speculate that, if genuine, this late activity can be due to a major extensional event, possibly heralding the oceanization process at ~190 Ma. Comparison between high quality U/Pb and 40Ar/39Ar ages of pegmatite lenses from the North Mountain basalts confirms a ~1% bias between the two chronometers. This discrepancy is likely attributed to the miscalibration of the 40K decay constants, in particular the electron capture branch. [Copyright &y& Elsevier]

Published
2009
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