The amphibolites in the ivreaverbano zone Northern Italy): A trace element and isotopic study

1998 ◽  
Vol 43 (S1) ◽  
pp. 85-85
Author(s):  
Lu Meihua ◽  
Rolf Schmid ◽  
Maurizio Mazzucchelli ◽  
Albrecht W. Hofmann
Keyword(s):  
Trace Element ◽  
Northern Italy ◽  
Isotopic Study

Nature des sources des composants andesitiques des Gres du Champsaur et des Gres de Taveyannaz; implications dans l'evolution des Alpes occidentales au Paleogene

2001 ◽  
Vol 172 (4) ◽  
pp. 487-501 ◽  
Author(s):  
Maud Boyet ◽  
Henriette Lapierre ◽  
Marc Tardy ◽  
Delphine Bosch ◽  
Rene Maury
Keyword(s):  
Trace Element ◽  
Western Alps ◽  
Northern Italy ◽  
Calc Alkaline ◽  
Magmatic Source ◽  
Isotopic Compositions ◽  
Alpine Zone ◽  
Internal Zone ◽  
Isotopic Geochemistry

Abstract Paleogene magmatism is widespread in the western Alps and its origin is still a matter of debate. It consists of calc-alkaline and shoshonitic suites with mainly granodioritic intrusions in the Internal Zone (northern Italy), andesitic volcanism in the Delphino-Helvetic Zone (French-Swiss domain) and the Esterellite intrusions in Provence. In the External Alpine Zone, the Taveyannaz Sandstones and the Champsaur Sandstones preserve andesitic pebbles and mineral fragments dated at 32 Ma. On the basis of trace-element and isotopic geochemistry (Sr, Nd, Pb and O) of mineral separates (amphibole, pyroxene and plagioclase) and andesitic clasts, we characterise the nature of magmatic source(s) and compare the isotopic compositions of the andesites with those of well known Paleogene igneous suites.

Major, trace element, and Sr isotope geochemistry of surface and ground waters in the Chiavenna Valley (Sondrio, Northern Italy)

2014 ◽  
Vol 30 ◽  
pp. 62-65 ◽  
Author(s):  
Laura Pinarelli ◽  
Barabara Nisi ◽  
Orlando Vaselli ◽  
Angelo Minissale ◽  
Antonella Buccianti ◽  
...  
Keyword(s):  
Trace Element ◽  
Isotope Geochemistry ◽  
Northern Italy ◽  
Sr Isotope ◽  
Ground Waters

Dietary investigation by trace element content in bones of ancient inhabitants of Northern Italy

2007 ◽  
Vol 275 (2) ◽  
pp. 355-363 ◽  
Author(s):  
M. Busetto ◽  
L. Giordani ◽  
A. Brandone ◽  
C. Cattaneo ◽  
A. Mazzucchi
Keyword(s):  
Trace Element ◽  
Trace Element Content ◽  
Northern Italy ◽  
Element Content

A geochemical and Sr-Nd-O isotopic study of the Proterozoic Eriksfjord Basalts, Gardar Province, South Greenland: Reconstruction of an OIB signature in crustally contaminated rift-related basalts

2003 ◽  
Vol 67 (5) ◽  
pp. 831-853 ◽  
Author(s):  
R. Halama ◽  
T. Wenzel ◽  
B. G. J. Upton ◽  
W. Siebel ◽  
G. Markl
Keyword(s):  
Trace Element ◽  
Granulite Facies ◽  
Alkaline Basalt ◽  
Isotopic Study ◽  
Nd Isotope ◽  
Crustal Component ◽  
Isotope Data ◽  
Enriched Mantle ◽  
Mantle Sources ◽  
Lower Crustal

AbstractBasalts from the volcano-sedimentary Eriksfjord Formation (Gardar Province, South Greenland) were erupted at around 1.2 Ga into rift-related graben structures. The basalts have compositions transitional between tholeiite and alkaline basalt with MgO contents <7 wt.% and they display LREE-enrichment relative to a chondritic source. Most of the trace element and REE characteristics are similar to those of basalts derived from OIB-like mantle sources. Initial 87Sr/86Sr ratios of clinopyroxene separates range from 0.70278 to 0.70383 and initial ϵNd values vary from –3.2 to +2.1. The most unradiogenic samples overlap with the field defined by carbonatites of similar age and can be explained by mixing of isotopically depleted and enriched mantle components. Using AFC modelling equations, the Sr-Nd isotope data of the more radiogenic basalts can successfully be modelled by addition of <5% lower crustal granulite-facies gneisses as contaminants. δ18Ov-smow values of separated clinopyroxene range from +5.2 to +6.0% and fall within the range of typical mantle-derived rocks. However, up to 10% mixing with an average lower crustal component are permitted by the data.

scholarly journals Melt Enrichment of Shallow Depleted Mantle: a Detailed Petrological, Trace Element and Isotopic Study of Mantle-Derived Xenoliths and Megacrysts from the Cameroon Line

1996 ◽  
Vol 37 (2) ◽  
pp. 415-441 ◽  
Author(s):  
DER-CHUEN LEE ◽  
ALEX N. HALLIDAY ◽  
GARETH R. DAVIES ◽  
ERIC J. ESSENE ◽  
J. GODFREY FITTON ◽  
...  
Keyword(s):  
Trace Element ◽  
Isotopic Study ◽  
Depleted Mantle

scholarly journals Dietary exposure estimates of twenty-one trace elements from a Total Diet Study carried out in Pavia, Northern Italy

2008 ◽  
Vol 101 (8) ◽  
pp. 1200-1208 ◽  
Author(s):  
Giovanna Turconi ◽  
Claudio Minoia ◽  
Anna Ronchi ◽  
Carla Roggi
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Adult Population ◽  
Daily Intake ◽  
Dietary Exposure ◽  
Northern Italy ◽  
Portion Size ◽  
Reliable Estimate ◽  
Daily Exposure ◽  
Total Diet

The significant role of trace elements in human health is well documented. Trace elements are those compounds that need to be present in the human diet to maintain normal physiological functions. However, some microelements may become harmful at high levels of exposure, or, on the other hand, may give rise to malnutrition, when their exposure is too low. The aim of the present study was to provide a reliable estimate of the dietary exposure of twenty-one trace elements in a Northern Italian area. For this purpose, trace element analyses were undertaken on total diet samples collected from a university cafeteria in Pavia, Northern Italy. The average daily exposure for the adult people was calculated on the basis of food consumption frequency, portion size and trace element levels in foodstuffs. The mean exposure values satisfy the Italian RDA for all the essential trace elements, except for Fe exposure in females, and are well below the Provisional Tolerable Daily Intake for all the toxic compounds, showing that the probability of dietary exposure to health risks is overall small. As far as Fe exposure is concerned, a potential risk of anaemia in the female adult population should be considered, then studies aimed at evaluating the Fe nutritional status of adult Italian women should be addressed. In conclusion, while not excluding the possibility that the daily exposure determined in the present study may not be representative of the population as a whole, this study provides a good estimate of the Italian adult consumer exposure to twenty-one trace elements.

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