Next Article in Journal
Galvanic Leaching of Seafloor Massive Sulphides Using MnO2 in H2SO4-NaCl Media
Previous Article in Journal
Geophysical Investigation of the Pb–Zn Deposit of Lontzen–Poppelsberg, Belgium
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Minerals 2018, 8(6), 234; https://doi.org/10.3390/min8060234

Femtosecond Laser Ablation-ICP-Mass Spectrometry and CHNS Elemental Analyzer Reveal Trace Element Characteristics of Danburite from Mexico, Tanzania, and Vietnam

1
NAWI Graz Geocentre, University of Graz, 8010 Graz, Austria
2
Climate Geochemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
3
Department of Earth and Planetary Sciences, Macquarie University, Sydney NSW 2109, Australia
4
Géosciences Montpellier, UMR 5243, CNRS & Université Montpellier, 34095 Montpellier, France
*
Authors to whom correspondence should be addressed.
Received: 7 May 2018 / Revised: 22 May 2018 / Accepted: 28 May 2018 / Published: 29 May 2018
(This article belongs to the Special Issue Mineralogy and Geochemistry of Gems)
View Full-Text   |   Download PDF [1880 KB, uploaded 15 June 2018]   |  

Abstract

Danburite is a calcium borosilicate that forms within the transition zones of metacarbonates and pegmatites as a late magmatic accessory mineral. We present here trace element contents obtained by femtosecond laser ablation-inductively coupled plasma (ICP)-mass spectrometry for danburite from Mexico, Tanzania, and Vietnam. The Tanzanian and Vietnamese samples show high concentrations of rare earth elements (∑REEs 1900 µg∙g−1 and 1100 µg∙g−1, respectively), whereas Mexican samples are depleted in REEs (<1.1 µg∙g−1). Other traces include Al, Sr, and Be, with Al and Sr dominating in Mexican samples (325 and 1611 µg∙g−1, respectively). Volatile elements, analyzed using a CHNS elemental analyzer, reach <3000 µg∙g−1. Sr and Al are incorporated following Ca2+ = Sr2+ and 2 B3+ + 3 O2− = Al3+ + 3 OH + □ (vacancy). REEs replace Ca2+ with a coupled substitution of B3+ by Be2+. Cerium is assumed to be present as Ce4+ in Tanzanian samples based on the observed Be/REE molar ratio of 1.5:1 following 2 Ca2+ + 3 B3+ = Ce4+ + REE3+ + 3 Be2+. In Vietnamese samples, Ce is present as Ce3+ seen in a Be/REE molar ratio of 1:1, indicating a substitution of Ca2+ + B3+ = REE3+ + Be2+. Our results imply that the trace elements of danburite reflect different involvement of metacarbonates and pegmatites among the different locations. View Full-Text
Keywords: danburite; trace elements; REE; femtosecond LA-ICP-MS; CHNS elemental analyzer; pegmatites; skarn danburite; trace elements; REE; femtosecond LA-ICP-MS; CHNS elemental analyzer; pegmatites; skarn
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Huong, L. .-T.; Otter, L.M.; Förster, M.W.; Hauzenberger, C.A.; Krenn, K.; Alard, O.; Macholdt, D.S.; Weis, U.; Stoll, B.; Jochum, K.P. Femtosecond Laser Ablation-ICP-Mass Spectrometry and CHNS Elemental Analyzer Reveal Trace Element Characteristics of Danburite from Mexico, Tanzania, and Vietnam. Minerals 2018, 8, 234.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Minerals EISSN 2075-163X Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top