Differentiation history of the mesosiderite parent body: constraints from trace elements and manganese-chromium isotope systematics in Vaca Muerta silicate clasts

2003 ◽  
Vol 67 (24) ◽  
pp. 5047-5069 ◽  
Author(s):  
M Wadhwa ◽  
A Shukolyukov ◽  
A.M Davis ◽  
G.W Lugmair ◽  
D.W Mittlefehldt
Keyword(s):  
Trace Elements ◽  
Parent Body ◽  
Vaca Muerta ◽  
History Of ◽  
Isotope Systematics ◽  
Manganese Chromium

scholarly journals Microstructural and paleomagnetic insight into the cooling history of the IAB parent body

2018 ◽  
Vol 229 ◽  
pp. 1-19 ◽  
Author(s):  
Claire I.O. Nichols ◽  
Robert Krakow ◽  
Julia Herrero-Albillos ◽  
Florian Kronast ◽  
Geraint Northwood-Smith ◽  
...  
Keyword(s):  
Parent Body ◽  
Cooling History ◽  
History Of ◽  
Insight Into

Age and Composition of Zircons From the Devonian Petrivske Kimberlite Pipe of the Azov Domain, the Ukrainian Shield

2021 ◽  
Vol 43 (4) ◽  
pp. 50-55
Author(s):  
L.V. SHUMLYANSKYY ◽  
V. KAMENETSKY ◽  
B.V. BORODYNYA
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Continental Crust ◽  
Kimberlite Pipe ◽  
Zircon Crystal ◽  
Precambrian Rock ◽  
Weighted Mean ◽  
Terrigenous Rocks ◽  
Devonian Age ◽  
Isotope Systematics

Results of a study of U-Pb and Hf isotope systematics and trace element concentrations in five zircon crystals separated from the Devonian Petrivske kimberlite are reported in the paper. Four zircons have yielded Paleoproterozoic and Archean ages, while one zircon grain gave a Devonian age of 383.6±4.4 Ma (weighted mean 206Pb/238U age). The Precambrian zircons have been derived from terrigenous rocks of the Mykolaivka Suite that is cut by kimberlite, or directly from the Precambrian rock complexes that constitute continental crust in the East Azov. The Devonian zircon crystal has the U-Pb age that corresponds to the age of kimberlite emplacement. It is 14 m.y. younger than zircon megacrysts found in the Novolaspa kimberlite pipe in the same area. In addition, Petrivske zircon is richer in trace elements than its counterparts from the Novolaspa pipe. Petrivske and Novolaspa zircons crystallized from two different proto-kimberlite melts, whereas the process of kimberlite formation was very complex and possibly included several episodes of formation of proto-kimberlite melts, separated by extended (over 10 M.y.) periods of time.

scholarly journals Trace elements geochemistry in high-incidence areas of liver-related diseases, northwestern Ethiopia

2019 ◽  
Vol 42 (5) ◽  
pp. 1235-1254
Author(s):  
Jemal Ahmed
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Selenium Deficiency ◽  
Stream Sediments ◽  
Low Grade ◽  
Geochemical Background ◽  
Water Stream ◽  
Icp Ms ◽  
History Of ◽  
Trace Element Contents

Abstract This paper reports the results of trace elements geochemistry from Tigray national state, northwestern Ethiopia. The area is part of the Arabian-Nubian Shield, where the dominant exposure is low-grade metamorphic rocks and has a long history of liver-related diseases. The increase in the number of liver-related disease patients of the area has been an environmental health issue of national concern. The aim of the study is to determine the level of trace element concentrations and distributions in water and stream sediments of the area and identify the possible sources in relation to human health. Water, stream sediment and rocks samples (20 water, 20 stream sediments, and 6 rock samples) were collected in March 2011 and analyzed for major and trace element contents using ICP-MS, ICP-OES, ion Chromatography, and XRF methods. Bromine, aluminum, fluorine, arsenic, and nitrate values exceed the WHO maximum acceptable concentration (MAC) for drinking purpose. Bromine ranges from 0.11 to 1.48 mg/l show higher values in all samples, and fluorine ranges from 0.21 to 16.49 mg/l show higher values in 20% of the samples. Other trace elements are aluminum—30%, arsenic—10%, and nitrate (NO3)—10%, and they are examples of elements which have above MAC for drinking water. Selenium deficiency may be the other problematic element in the area for which its deficiency is associated with liver damage and heart muscle disorder. The concentration of cobalt and chromium exceeded world geochemical background value in average shale at most sample stations indicated that these stations were in potential risk.

scholarly journals Hf–W thermochronometry: Closure temperature and constraints on the accretion and cooling history of the H chondrite parent body

2008 ◽  
Vol 270 (1-2) ◽  
pp. 106-118 ◽  
Author(s):  
Thorsten Kleine ◽  
Mathieu Touboul ◽  
James A. Van Orman ◽  
Bernard Bourdon ◽  
Colin Maden ◽  
...  
Keyword(s):  
Parent Body ◽  
Closure Temperature ◽  
Cooling History ◽  
History Of
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