scholarly journals Metallogenic model of the Jinchang Au-Ni deposit in the Ailaoshan belt, SW China, determined on the basis of pyrite trace element contents, in-situ sulfur isotope composition and PGE geochemistry

2020 ◽  
Vol 120 ◽  
pp. 103415 ◽  
Author(s):  
Lin-Gang Xu ◽  
Zhi-Gang Kong ◽  
Jian-Fei Qu ◽  
Bao-Long Li ◽  
Zhi-Yin Qiu ◽  
...  
Keyword(s):  
Trace Element ◽  
Sulfur Isotope ◽  
Isotope Composition ◽  
Sw China ◽  
Metallogenic Model ◽  
Trace Element Contents ◽  
Sulfur Isotope Composition ◽  
Element Contents ◽  
Pge Geochemistry

scholarly journals Large sulfur isotope fractionation in lunar volcanic glasses reveals the magmatic differentiation and degassing of the Moon

2021 ◽  
Vol 7 (9) ◽  
pp. eabe4641
Author(s):  
Alberto E. Saal ◽  
Erik H. Hauri
Keyword(s):  
Sulfur Isotope ◽  
Melt Inclusions ◽  
Isotope Composition ◽  
The Moon ◽  
Magmatic Differentiation ◽  
Sulfur Isotope Fractionation ◽  
Volcanic Glasses ◽  
Sulfur Isotope Composition ◽  
Lunar Core

Sulfur isotope variations in mantle-derived lavas provide important constraints on the evolution of planetary bodies. Here, we report the first in situ measurements of sulfur isotope ratios dissolved in primitive volcanic glasses and olivine-hosted melt inclusions recovered from the Moon by the Apollo 15 and 17 missions. The new data reveal large variations in 34S/32S ratios, which positively correlates with sulfur and titanium contents within and between the distinct compositional groups of volcanic glasses analyzed. Our results uncover several magmatic events that fractionated the primordial sulfur isotope composition of the Moon: the segregation of the lunar core and the crystallization of the lunar magma ocean, which led to the formation of the heterogeneous sources of the lunar magmatism, followed by magma degassing during generation, transport, and eruption of the lunar lavas. Whether the Earth’s and Moon’s interiors share a common 34S/32S ratio remains a matter of debate.

In-situ sulfur isotope and trace element of pyrite constraints on the formation and evolution of the Nibao Carlin-type gold deposit in SW China

2019 ◽  
Vol 38 (4) ◽  
pp. 555-575 ◽  
Author(s):  
Jinxiang Li ◽  
Chenghai Zhao ◽  
Yong Huang ◽  
Yuzhou Zhuo ◽  
Jinwei Li
Keyword(s):  
Trace Element ◽  
Gold Deposit ◽  
Sulfur Isotope ◽  
Sw China ◽  
Formation And Evolution

Trace Element Contents in Thyroid Cancer Investigated by Instrumental Neutron Activation Analysis

2018 ◽  
Vol 1 (1) ◽  
pp. 1-13
Keyword(s):  
Thyroid Cancer ◽  
Neutron Activation Analysis ◽  
Instrumental Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Trace Element ◽  
Thyroid Tissue ◽  
Tissue Levels ◽  
Trace Element Contents ◽  
Element Contents

Background: Thyroid cancer is an internationally important health problem. The aim of this exploratory study was to evaluate whether significant changes in the thyroid tissue levels of Ag, Co, Cr, Fe, Hg, Rb, Sb, Sc, Se, and Zn exist in the malignantly transformed thyroid. Methods: Thyroid tissue levels of ten trace elements were prospectively evaluated in 41 patients with thyroid malignant tumors and 105 healthy inhabitants. Measurements were performed using non-destructive instrumental neutron activation analysis with high resolution spectrometry of long-lived radionuclides. Tissue samples were divided into two portions. One was used for morphological study while the other was intended for trace element analysis. Results: It was found that contents of Ag, Co, Cr, Hg, and Rb were significantly higher (approximately 12.8, 1.4, 1.6, 19.6, and 1.7 times, respectively) in cancerous tissues than in normal tissues. Conclusions: There are considerable changes in trace element contents in the malignantly transformed tissue of thyroid.

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