Trace element distribution in primary sulfides and Fe–Ti oxides from the sulfide-rich pods of the Lac des Iles Pd deposits, Western Ontario, Canada: Constraints on processes controlling the composition of the ore and the use of pentlandite compositions in exploration

2016 ◽  
Vol 166 ◽  
pp. 45-63 ◽  
Author(s):  
C.J. Duran ◽  
S.-J. Barnes ◽  
J.T. Corkery
Keyword(s):  
Trace Element ◽  
Element Distribution ◽  
Trace Element Distribution ◽  
Ti Oxides ◽  
Lac Des Iles

Geochemistry of a continental tholeiite suite: late Palaeozoic quartz dolerite dykes of Scotland

1981 ◽  
Vol 72 (1) ◽  
pp. 57-74 ◽  
Author(s):  
R. Macdonald ◽  
D. Gottfried ◽  
M. J. Farrington ◽  
F. W. Brown ◽  
N. G. Skinner
Keyword(s):  
Trace Element ◽  
Hot Spots ◽  
Element Distribution ◽  
Trace Element Distribution ◽  
Trace Element Data ◽  
Magma Reservoirs ◽  
Ti Oxides ◽  
Mantle Sources ◽  
Magnesian Basalt ◽  
Pressure Evolution

AbstractThe late Carboniferous quartz dolerite suite of Scotland consists mainly of quartz tholeiites, with subordinate olivine tholeiites and tholeiitic andesites. The low pressure evolution of the magmas was controlled by fractionation of olivine–plagioclase–pyroxene–oxides assemblages from more magnesian compositions and plagioclase–pyroxene–oxides–apatite removal from intermediate compositions. A higher pressure stage dominated by olivine fractionation is suggested by the presence of olivine nodules in a magnesian basalt dyke from Fife.The suite is of high-Fe-Ti type, closely comparable to certain basalts erupted in areas of active lithospheric spreading or “hot spots”, such as Iceland and Hawaii. The ppO2 can be inferred to have been rather higher in the Scottish rocks than in comparative suites, promoting earlier separation of Fe-Ti oxides, with the consequent effects on trace element distribution.Apart from varying degrees of fractionation, chemical variations in the dykes are of three types: rather minor variations along individual dykes, variations across certain thicker dykes, and minor and trace element variations reflecting chemical heterogeneities in the mantle sources. The dykes and sills are inferred to have been fed from a plexus of small, partly independent, magma reservoirs.New trace element data on tholeiitic lavas from the Oslo Rift confirm recently revived suggestions that the Scottish and northern English quartz dolerites are part of a larger province extending into Scandinavia.

Methylmercury and Trace Element Distribution in the Organs of Stenella coeruleoalba Dolphins Stranded on the French Mediterranean Coast

2014 ◽  
Vol 8 (1) ◽  
pp. 35-48 ◽  
Author(s):  
Emmanuel Wafo ◽  
Véronique Risoul ◽  
Thérèse Schembri ◽  
Véronique Lagadec ◽  
Frank Dhermain ◽  
...  
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Marine Pollution ◽  
Element Distribution ◽  
Mediterranean Coast ◽  
Trace Element Distribution ◽  
Slight Reduction ◽  
Stenella Coeruleoalba ◽  
Contamination Levels

The main objective of this study was to evaluate the contamination by mercury (Hg), methylmercury (Me-Hg), cadmium (Cd), selenium (Se), zinc (Zn), copper (Cu), iron (Fe) and manganese (Mn) in dolphins stranded on the French Mediterranean coast. The distributions of these contaminants in the organs of dolphins have also been studied. Overall, contamination levels varied according to the following sequence: liver > kidney > lung > muscle, except for cadmium (kidney > liver > lung > muscle). Size and sex of animals were also considered. Young dolphins were less impacted with trace elements than adults, except for copper. Among the studied parameters, the most important appeared to be the size of mammals. In addition, in the case of mercury and selenium, the sex of mammals seemed to be also relevant. The correlations between the concentrations of trace elements suggest the existence of detoxification processes. Since 1990s, using dolphins for tracing marine pollution, a slight reduction in the burden of the considered trace elements could be noted.

TRACE-ELEMENT DISTRIBUTION IN GIANT SPODUMENE CRYSTALS IN GRANITIC PEGMATITES FROM THE BLACK HILLS, SOUTH DAKOTA AND NEWRY, MAINE

2019 ◽  
Author(s):  
Stephan R. Hlohowskyj ◽  
◽  
Mona-Liza C. Sirbescu ◽  
James J. Student ◽  
Niels Hulsbosch ◽  
...  
Keyword(s):  
South Dakota ◽  
Trace Element ◽  
Element Distribution ◽  
Black Hills ◽  
Trace Element Distribution ◽  
Granitic Pegmatites

Trace element distribution in mineral inclusions in zoned garnets from eclogites of the Atbashi Range (South Tianshan)

2014 ◽  
Vol 52 (11) ◽  
pp. 939-961 ◽  
Author(s):  
N. I. Volkova ◽  
S. V. Kovyazin ◽  
S. I. Stupakov ◽  
V. A. Simonov ◽  
K. S. Sakiev
Keyword(s):  
Trace Element ◽  
Element Distribution ◽  
Trace Element Distribution ◽  
Mineral Inclusions ◽  
South Tianshan

Historical trace element distribution in sediments from the Mississippi River delta

2006 ◽  
Vol 29 (6) ◽  
pp. 1094-1107 ◽  
Author(s):  
Peter W. Swarzenski ◽  
Mark Baskaran ◽  
Robert J. Rosenbauer ◽  
William H. Orem
Keyword(s):  
Trace Element ◽  
Mississippi River ◽  
Element Distribution ◽  
River Delta ◽  
Trace Element Distribution ◽  
Mississippi River Delta
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