The Mt. Gottero Sandstone of Punta Mesco area (Late Campanian-Early Paleocene, Northern Apennines): stratigraphic and petrographic analisys of the inner part of a deep sea fan. The Mt. Gottero Sandstone (Late Campanian-Early Paleocene) is remanents of the sedimentary cover of the Ligure-Piemontese oceanic lithosphere consisting of a thick siliciclastic turbidite system interpreted as a deep sea fan. The Mt.Gottero sandstone that crops out in the Punta Mesco area (Eastern Liguria) represents the inner part of the turbidite system characterized by the presence of high density turbidity current derived deposits (F4 to F8 Mutti's 1992 facies) and impact features. The provenance of Gottero Sandstone from the Punta Mesco area has been investigated by petrographic modal analysis of arenites and conglomerates. A detailed analysis of conglomerate lithic fragments has also been performed. According to previous works, arenites detrital mode of the Mt. Gottero Sandstone is quartz-feldspathic (Q50F33L17). The lithic fragments are mainly derived by granitoids, low grade metamorphic rocks and acidic volcanics; minor calcareous extrabasinal clasts are also present. Ophiolite derived rock fragments are absent. The petrographic parameters indicate a continental basament terrain as probable source area characterized by the exposure of large crystalline massif.
Le Arenarie del M.Gottero nella sezione di Punta Mesco (Campaniano Sup.-Paleocene Inf., Appennino Settentrionale): analisi stratigrafica e petrografica della parte prossimale di un sistema torbiditico
PANDOLFI, LUCA
1997-01-01
Abstract
The Mt. Gottero Sandstone of Punta Mesco area (Late Campanian-Early Paleocene, Northern Apennines): stratigraphic and petrographic analisys of the inner part of a deep sea fan. The Mt. Gottero Sandstone (Late Campanian-Early Paleocene) is remanents of the sedimentary cover of the Ligure-Piemontese oceanic lithosphere consisting of a thick siliciclastic turbidite system interpreted as a deep sea fan. The Mt.Gottero sandstone that crops out in the Punta Mesco area (Eastern Liguria) represents the inner part of the turbidite system characterized by the presence of high density turbidity current derived deposits (F4 to F8 Mutti's 1992 facies) and impact features. The provenance of Gottero Sandstone from the Punta Mesco area has been investigated by petrographic modal analysis of arenites and conglomerates. A detailed analysis of conglomerate lithic fragments has also been performed. According to previous works, arenites detrital mode of the Mt. Gottero Sandstone is quartz-feldspathic (Q50F33L17). The lithic fragments are mainly derived by granitoids, low grade metamorphic rocks and acidic volcanics; minor calcareous extrabasinal clasts are also present. Ophiolite derived rock fragments are absent. The petrographic parameters indicate a continental basament terrain as probable source area characterized by the exposure of large crystalline massif.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
