1,721,097 research outputs found
PAHs and phenols clay minerals interactions: a mechanochemical approach for remediation of clay rich soils
No full textFelsic Volcanics in Upper Triassic to Lower Cretaceous Pelagic Sediments from the Lucanian Apennine, Southern Italy: Geochemistry and Palaeotectonic Implications
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Geology and geochemistry of the Jurassic pelagic sediments from the Lagonegro Units, southern Apennines, Italy
No full textA better understanding of genesis and palaeoenvironmental setting of the Scisti silicei Formation (Lagonegro units, southern
Italy) was achieved by means of geochemical analysis integrated with new stratigraphic information. Data show that major and
trace element geochemistry of ancient clay-rich beds and banded cherts add new insights into the Mesozoic evolution of the
Lagonegro basin. Sedimentary contributions to Jurassic shales sampled during this study were mainly derived from two major
sources: (i) a dominant terrigenous fine-grained component, having affinity with average upper continental crust that had not
undergone intense weathering and (ii) biogenic siliceous material. The latter component occurs in clay-rich layers from the
‘‘basal member’’ of the Scisti silicei Formation. Composition varies up section and accounts for changes in the detrital supply
due to bathymetric oscillations. The compositional variations from the basal to the overlying member are consistent with a distal
source passing in time to a more ‘‘proximal’’ source, as indicated by sharp changes in the concentrations of detrital elements (Ti,
Zr and Nb). It is likely that increased detrital input occurred through turbidity current deposition. Finally, the chemical features
of the clay-rich layers from the upper cherty portion of the studied succession imply a progressive deepening of the basin. The
lack of any mafic and hydrothermal contributions in the Jurassic shales as well as the continental nature of detrital input
suggests that the Lagonegro basin was located between two carbonate platforms, in accordance with the classical restoration of
the African–Apulian palaeomargin. Thus, the basin acted as a preferential sink connected to the African cratonic areas through
a southern entry point
Chronological constraints on a Holocene landslide in an intermontane basin of the southern Apennines, Italy: Morphological evolution and palaeoclimate implications
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Comparazione tra l'evoluzione strutturale e geochimica del vulcano quaternario del Monte Vulture in Basilicata
No full textClay mineralogy, geochemistry and structural setting of the ophiolite-bearing units from southern Italy: a multidisciplinary approach to assess tectonic history and exhumation modalities
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