Major and trace elements in the twig axes of Norway spruce and the relationship between twig axis and needles

Trees ◽  
1988 ◽  
Vol 2 (4) ◽  
Author(s):  
A. Wyttenbach ◽  
L. Tobler ◽  
S. Bajo
Keyword(s):  
Trace Elements ◽  
Norway Spruce ◽  
Major And Trace Elements ◽  
The Relationship

Stable isotope and chemical stratigraphy of the Eocene Tambaba Formation: correlations with the Palaeocene-Eocene Thermal Maximum event

2021 ◽  
pp. SP507-2020-35
Author(s):  
José Diego Dias Veras ◽  
João Adauto de Souza Neto ◽  
Alcides Nóbrega Sial ◽  
Valderez Pinto Ferreira ◽  
Virgínio Henrique de Miranda Lopes Neumann
Keyword(s):  
Trace Elements ◽  
Upper Cretaceous ◽  
Environmental Changes ◽  
Major And Trace Elements ◽  
Northeastern Brazil ◽  
Depositional Sequence ◽  
Thermal Maximum ◽  
Carbonate Sequence ◽  
Environmental Responses ◽  
The Relationship

AbstractThe Paraíba Basin has a well-defined carbonate depositional sequence from the Upper Cretaceous (Campanian) to the Eocene. The carbonate sequence consists of Itamaracá, Gramame, Maria Farinha and Tambaba formations, which mainly contain calcareous sandstones and carbonates with siliciclastics, limestone-marl alternations, limestones and marls, and limestones, respectively. The Tambaba Formation is composed of reef limestones, ranging from fossil- and ichnofossil-rich calcilutite to calcarenite. We investigated the rocks of this unit located on a representative geological section in the Tambaba Beach, Northeastern Brazil, in order to elucidated the environmental responses recorded in geochemical proxies (C and O isotopic composition, and distribution of major and trace elements). The δ13C and δ18O values ranged from 1.0 to 2.7‰ VPDB and from -1.3 to 1.1‰ VPDB, respectively. The interpretation of this response suggests environmental changes, such as an increase or decrease in bioproductivity from the organisms that build these reef limestones. These changes are also recorded in the behavior of the major and trace elements, for example, the relationship among SiO2, Al2O3, MgO and CaO, characterizing two different cycles during the deposition of these limestones: the first one characterized by a predominantly carbonate deposition, and the second one presenting a pulse of siliciclastic content. In addition, the palaeotemperature values (9 to 15°C, obtained by δ18O data) found together with chemostratigraphic profiles of previous studies (e.g. δ13C, CaO, MgO, SiO2, Al2O3) indicate that the reef limestones of the Tambaba Formation were probably deposited about 5 Ma after the Palaeocene-Eocene Thermal Maximum event.

XX.—The Geochemistry of some Caledonian Plutonic Rocks: A Study in the Relationship between the Major and Trace Elements of Igneous Rocks and their Minerals

1947 ◽  
Vol 61 (2) ◽  
pp. 533-575 ◽  
Author(s):  
S. R. Nockolds ◽  
R. L. Mitchell
Keyword(s):  
Trace Elements ◽  
Final Stage ◽  
Major And Trace Elements ◽  
Igneous Rocks ◽  
Rock Types ◽  
Ring Complexes ◽  
Plutonic Rocks ◽  
The Relationship

The Caledonian plutonic rocks of Western Scotland form a well-defined group, ranging from ultrabasic to acid types, which have been studied in detail by a number of petrologists. They form intrusions of varying size, usually composite and frequently, at least, having the habit of ring complexes. The rock types include peridotites and pyroxenites, gabbros, hornblendite and appinite, appinitic diorites, pyroxene-mica diorites, hornblende-biotite diorite, various hornblende-biotite grandiorites, biotite adamellite and muscovite-biotite adamellite, while the final stage is represented by numerous veins of aplite and rare pegmatites.

Major and Trace Elements in the Humic Acid

2018 ◽  
Author(s):  
Zoltán Kis ◽  
Katalin Gméling ◽  
Tímea Kocsis ◽  
János Osán ◽  
Mihály András Pocsai ◽  
...  
Keyword(s):  
Trace Elements ◽  
Humic Acid ◽  
Activation Analysis ◽  
Analytical Techniques ◽  
Major And Trace Elements ◽  
Prompt Gamma Activation Analysis ◽  
Prompt Gamma ◽  
Gamma Activation ◽  
X Ray ◽  
Precise Analysis

We present precise analysis of major and trace elements of the humic acid. We used three different element analytical techniques in our investigations as prompt-gamma activation analysis (PGAA), neutron activation analysis (NAA) and X-ray fluorescence (XRF) analysis was carried out. We identified 42 elements in our sample.

A review of major and trace elements in Nile River and Western Red Sea sediments: An approach of geochemistry, pollution, and associated hazards

2021 ◽  
Vol 170 ◽  
pp. 109595
Author(s):  
Wael M. Badawy ◽  
Octavian G. Duliu ◽  
Hussein El Samman ◽  
Atef El-Taher ◽  
Marina V. Frontasyeva
Keyword(s):  
Trace Elements ◽  
Red Sea ◽  
Major And Trace Elements ◽  
Nile River

scholarly journals Data set of dissolved major and trace elements from the lacustrine systems of Clearwater Mesa, Antarctica

Data in Brief ◽  
2020 ◽  
Vol 30 ◽  
pp. 105438
Author(s):  
Karina L. Lecomte ◽  
Cecilia V. Echegoyen ◽  
Paula A. Vignoni ◽  
Kateřina Kopalová ◽  
Tyler J. Kohler ◽  
...  
Keyword(s):  
Trace Elements ◽  
Major And Trace Elements ◽  
Data Set

scholarly journals Erratum to: Mobilization and redistribution of major and trace elements in a lateritic profile: the Sheikh-Marut deposit, NW Iran

2015 ◽  
Vol 8 (12) ◽  
pp. 10883-10885
Author(s):  
Ali Abedini ◽  
Ali Asghar Calagari
Keyword(s):  
Trace Elements ◽  
Major And Trace Elements ◽  
Nw Iran ◽  
Lateritic Profile
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