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Minerals
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Stable-Isotope Geochemistry
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Stable-Isotope Geochemistry

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Geochemistry and Geochronology".

Deadline for manuscript submissions: closed (30 October 2019) | Viewed by 4009

Special Issue Editors

Prof. Dr. Luigi Dallai

E-Mail Website
Guest Editor
Consiglio Nazionale delle Ricerche, Rome, Italy
Interests: isotope geochemistry in high temperature processes; petrology; volcanology; gas emission; polar paleoclimate recostructions
Prof. Dr. Paola Iacumin

E-Mail Website
Guest Editor
Dipartimento di Scienze Chimiche, della Vita e della, University of Parma, 43121 Parma, Italy
Interests: application of the stable isotope geochemistry; archaeology; palaeoclimatology; hydrology

Special Issue Information

Dear Colleagues,

Stable isotope geochemistry has been used to investigate a wealth of naturally occurring reactions, both at low and high temperature conditions. Palaeo-climatic reconstructions of marine sediments as well as continental speleothems are based on oxygen isotope fractionation between carbonate and water. Geothermal exploration, mantle petrology, and cosmochemical classification conveniently use the measurements of oxygen isotope abundances, either reflecting or deviating from mass-dependent isotope fractionation processes. In addition to oxygen isotopes, hydrogen, carbon, and nitrogen isotopes have also been used to investigate hydrological cycles, carbon sink and sources, and anthropogenic pollution. Nitrogen isotopes have been proven relevant for understanding pollution and metabolism of animals and plants. More recently, the oxygen isotopes of the PO43− ion and the carbon isotopes of the CO32− of the bioapatite have been used for palaeoenvironmental reconstruction and diet studies of ancient populations. The diffusion of stable isotope analytical methods in various cultural sectors has sometimes led to an uncritical use of these very useful isotopes. Here we collect contributions from different geochemical perspectives, providing scientific advancement through an accurate use of stable isotope investigations.

Prof. Dr. Luigi Dallai
Prof. Dr. Paola Iacumin
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Minerals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • water
  • anthropic pollution
  • element cycles
  • bioapatite
  • palaeodiet
  • palaeoclimate
  • palaeoenvironment
  • analytical methodologies
  • petrology
  • volcanology
  • hydrological cycle

Published Papers (1 paper)

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Research

24 pages, 12611 KiB  
Article
Fluid Evolution and Ore Genesis of the Qibaoshan Polymetallic Ore Field, Shandong Province, China: Constraints from Fluid Inclusions and H–O–S Isotopic Compositions
by Guang-Yuan Yu, Shun-Da Li, Yi-Cun Wang and Ke-Yong Wang
Minerals 2019, 9(7), 394; https://doi.org/10.3390/min9070394 - 28 Jun 2019
Cited by 5 | Viewed by 3679
Abstract
The Qibaoshan polymetallic ore field is located in the Wulian area, Shandong Province, China. Four ore deposits occur in this ore field: the Jinxiantou Au–Cu, Changgou Cu–Pb–Zn, Xingshanyu Pb–Zn, and Hongshigang Pb–Zn deposits. In the Jinxiantou deposit, three paragenetic stages were identified: quartz–pyrite–specularite–gold [...] Read more.
The Qibaoshan polymetallic ore field is located in the Wulian area, Shandong Province, China. Four ore deposits occur in this ore field: the Jinxiantou Au–Cu, Changgou Cu–Pb–Zn, Xingshanyu Pb–Zn, and Hongshigang Pb–Zn deposits. In the Jinxiantou deposit, three paragenetic stages were identified: quartz–pyrite–specularite–gold (Stage 1), quartz–pyrite–chalcopyrite (Stage 2), and quartz–calcite–pyrite (Stage 3). Liquid-rich aqueous (LV type), vapor-rich aqueous (V type), and halite-bearing (S type) fluid inclusions (FIs) are present in the quartz from stages 1–3. Microthermometry indicates that the initial ore-forming fluids had temperatures of 351–397 °C and salinities of 42.9–45.8 mas. % NaCl equivalent. The measured hydrogen and calculated oxygen isotopic data for fluid inclusion water (δ18OFI = 11.1 to 12.3‰; δDFI = −106.3 to −88.6‰) indicates that the ore-forming fluids were derived from magmatic water; then, they were mixed with meteoric water. In the Changgou deposit, three paragenetic stages were identified: quartz–pyrite–specularite (Stage 1), quartz–pyrite–chalcopyrite (Stage 2), and quartz–galena–sphalerite (Stage 3). LV, V, and S-type FIs are present in the quartz from stages 1–3. Microthermometry indicates that the initial ore-forming fluids had temperatures of 286–328 °C and salinities of 36.7–40.2 mas. % NaCl equivalent. The measured hydrogen and calculated oxygen isotopic data for fluid inclusion water (δDFI = −115.6 to −101.2‰; δ18OFI = 12.2 to 13.4‰) indicates that the ore-forming fluids were derived from magmatic water mixed with meteoric water. The characteristics of the Xingshanyu and Hongshigang deposits are similar. Two paragenetic stages were identified in these two deposits: quartz–galena–sphalerite (Stage 1) and quartz–calcite–poor sulfide (Stage 2). Only LV-type FIs are present in the quartz in stages 1–2. The ore-forming fluids had temperatures of 155–289 °C and salinities of 5.6–10.5 mas. % NaCl equivalent. The measured hydrogen and calculated oxygen isotopic data for fluid inclusion water (δDFI = −109.8 to −100.2‰; δ18OFI = 10.2 to 12.1‰) indicates that the ore-forming fluids were derived from circulating meteoric waters. The sulfur isotopes (δ34Ssulfide = 0.6 to 4.3‰) of the four deposits are similar, indicating a magmatic source for the sulfur with minor contributions from the wall rocks. The ore field underwent at least two phases of mineralization according to the chronology results of previous studies. Based on the mineral assemblage and fluid characteristics, we suggest that the late Pb–Zn mineralization was superimposed on the early Cu (–Au) mineralizaton in the Changgou deposit. Full article
(This article belongs to the Special Issue Stable-Isotope Geochemistry)
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