scholarly journals Reconstruction of Diagenetic History of Ancient Carbonate by LA-ICP-MS Trace Element Mapping

2020 ◽  
Author(s):  
Anping Hu ◽  
Hanxuan Yang ◽  
Xianying Luo
Keyword(s):  
Trace Element ◽  
Icp Ms ◽  
History Of ◽  
Diagenetic History ◽  
Element Mapping

Trace Element Mapping of Copper- and Zinc-Rich Black Smoker Chimneys from Brothers Volcano, Kermadec Arc, Using Synchrotron Radiation XFM and LA-ICP-MS

2019 ◽  
Vol 114 (1) ◽  
pp. 67-92 ◽  
Author(s):  
H. A. Berkenbosch ◽  
C.E.J. de Ronde ◽  
C. G. Ryan ◽  
A. W. McNeill ◽  
D. L. Howard ◽  
...  
Keyword(s):  
Synchrotron Radiation ◽  
Trace Element ◽  
Black Smoker ◽  
Copper And Zinc ◽  
Icp Ms ◽  
Element Mapping

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 Trace element mapping by LA-ICP-MS: assessing geochemical mobility in garnet

2017 ◽  
Vol 172 (4) ◽  
Author(s):  
Tom Raimondo ◽  
Justin Payne ◽  
Benjamin Wade ◽  
Pierre Lanari ◽  
Chris Clark ◽  
...  
Keyword(s):  
Trace Element ◽  
Icp Ms ◽  
Element Mapping

LA-ICP-MS trace element mapping: Element mobility of hydrothermal magnetite from the giant Beiya Fe-Au skarn deposit, SW China

2018 ◽  
Vol 92 ◽  
pp. 463-474 ◽  
Author(s):  
Dengfeng Li ◽  
Yu Fu ◽  
Xiaoming Sun ◽  
Pete Hollings ◽  
Jianlin Liao ◽  
...  
Keyword(s):  
Trace Element ◽  
Element Mobility ◽  
Skarn Deposit ◽  
Sw China ◽  
Icp Ms ◽  
Element Mapping

Cryptic secondary cementation of Ordovician limestones in the Baltoscandian Basin, northern Europe, revealed through trace-element mapping and U-Pb dating by LA-ICP-MS

2021 ◽  
Author(s):  
Graham Hagen-Peter ◽  
Yue Wang ◽  
Olle Hints ◽  
Aivo Lepland
Keyword(s):  
Trace Element ◽  
Environmental Changes ◽  
Open Systems ◽  
Drill Core ◽  
Secondary Phases ◽  
Thin Sections ◽  
Icp Ms ◽  
Two Samples ◽  
Isotope Record ◽  
Element Mapping

<p>Primary phases in carbonate rocks archive a wealth of geochemical information about depositional conditions and environmental changes. Secondary phases may record additional—albeit more cryptic—information, potentially complicating interpretation of primary signatures. The ability to compositionally characterize and date multiple, texturally distinct generations of primary, diagenetic, and metamorphic carbonate phases enables deciphering of complex depositional and post-depositional histories carbonate successions have experienced. Combined trace-element mapping and U-Pb geochronology of calcite <em>in situ</em> (in thin sections) by LA-ICP-MS provides opportunities to assign absolute ages to calcite crystallization and recrystallization with petrographic and geochemical context. We have applied this approach to two samples of apparently pristine, unmetamorphosed Ordovician bioclastic limestones from the Viki drill core (western Estonia), representing the eastern part of the Baltoscandian Basin. The depositional ages of the samples are constrained by biostratigraphic correlation to ca. 460 and 445 Ma (Hints et al., 2014). Several lines of evidence—such as very low organic-matter maturation and properties of clay minerals—indicate that this sequence did not experience temperatures above 100 °C, and likely not above 50 °C, since deposition (Kirsimäe et al., 2020). Optical petrography and backscatter-electron (“BSE”) imaging reveal low-porosity “BSE-bright” calcite spar cement in pore spaces between “BSE-dark” micro-porous calcite bioclasts. Trace-element mapping of several areas (several mm<sup>2</sup> each) in each thin section by LA-quadrupole-ICP-MS reveals variably elevated Mn/Sr, U concentration, and U/Pb in the calcite spar cement. The trace-element maps were subsequently used to guide the placement of laser spots for U-Pb dating by LA-multicollector-ICP-MS. Primary bioclastic calcite in both samples has low U/Pb (<sup>238</sup>U/<sup>206</sup>Pb < 7) and, thus, does not yield precise Concordia-intercept dates. The primary calcite does, however, yield imprecise intercept dates within uncertainty of the depositional ages. Calcite spar cement has higher U/Pb (<sup>238</sup>U/<sup>206</sup>Pb up to ~15.7) and including all analyses, yields intercept dates of ca. 415 Ma in each sample. Additionally, several of the domains with the highest U/Pb from each sample yield slightly younger dates of ca. 400­-380 Ma. The timing of calcite (re)crystallization and cementation identified here overlaps with the timing of continent collision during the Caledonian orogeny in Scandinavia. We tentatively interpret this to be a result of fluid flow in response to the collision far-inboard (>500 km) from the orogenic front. Furthermore, this work demonstrates that apparently pristine carbonates may have experienced recrystallization (or at least chemical-isotopic perturbation) in open systems long after deposition.</p><p>References</p><p>Hints, O., Martma, T., Männik, P., Nõlvak, J., Põldvere, A., Shen, Y., Viira, V. 2014. New data on Ordovician stable isotope record and conodont biostratigraphy from the Viki reference drill core, Saaremaa Island, western Estonia. GFF 136, 100–104.</p><p>Kirsimäe, K., Somelar, P., Jõeleht, A. 2020. Illitization of the lower Cambrian (Terreneuvian) Blue Clay in the northern Baltic Palaeobasin. Estonian Journal of Earth Sciences 69, 200–213.</p>

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