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Minerals
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Optical Spectroscopy of Phosphate, Sulfate and Carbonate Minerals
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Optical Spectroscopy of Phosphate, Sulfate and Carbonate Minerals

A special issue of Minerals (ISSN 2075-163X).

Deadline for manuscript submissions: closed (30 November 2018) | Viewed by 5141

Special Issue Editor

Dr. Laurence Hopkinson

E-Mail Website
Guest Editor
School of Environment and Technology, University of Brighton, Brighton, UK
Interests: near infrared; mid infrared; laser Raman spectroscopy; carbonate, sulfate and phosphate mineralogy

Special Issue Information

Dear Colleagues,

Collectively, phosphate, sulfate, and carbonate mineral groups occur in a wealth of terrestrial sedimentary settings. They are widely used in everyday life, they find application in a range of essential industries, and are of significant interest in planetary exploration. Considerable endeavour has been devoted to understanding the optical spectroscopic signatures of these mineral groups. However, the very nature of the challenge is such that spectroscopic characterisation of the ever-expanding list of synthetic and natural carbonate, sulfate and phosphate mineral compounds remains work in progress, as does the use of vibrational spectroscopy as a tool to decipher mineral paragenesis, hydration and dehydration reactions. Accordingly, the aim of this Special Issue is to publish papers on the most recent advances in vibrational spectroscopy in relation to the characterisation of stable and metastable carbonate, sulfate and phosphate mineral compounds.

Dr. Laurence Hopkinson
Guest Editor

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

  • Carbonates
  • Phosphates
  • Sulfates
  • Laser Raman
  • Mid infrared
  • Near infrared
  • Mineral paragenesis
  • Reaction kinetics
  • Metastability
  • Spectroscopy

Published Papers (1 paper)

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Research

19 pages, 2713 KiB  
Article
Quick, Easy, and Economic Mineralogical Studies of Flooded Chalk for EOR Experiments Using Raman Spectroscopy
by Laura Borromeo, Nina Egeland, Mona Wetrhus Minde, Udo Zimmermann, Sergio Andò, Merete Vadla Madland and Reidar Inge Korsnes
Minerals 2018, 8(6), 221; https://doi.org/10.3390/min8060221 - 23 May 2018
Cited by 15 | Viewed by 4666
Abstract
Understanding the chalk-fluid interactions and the associated mineralogical and mechanical alterations on a sub-micron scale are major goals in Enhanced Oil Recovery. Mechanical strength, porosity, and permeability of chalk are linked to mineral dissolution that occurs during brine injections, and affect the reservoir [...] Read more.
Understanding the chalk-fluid interactions and the associated mineralogical and mechanical alterations on a sub-micron scale are major goals in Enhanced Oil Recovery. Mechanical strength, porosity, and permeability of chalk are linked to mineral dissolution that occurs during brine injections, and affect the reservoir potential. This paper presents a novel “single grain” methodology to recognize the varieties of carbonates in rocks and loose sediments: Raman spectroscopy is a non-destructive, quick, and user-friendly technique representing a powerful tool to identify minerals down to 1 µm. An innovative working technique for oil exploration is proposed, as the mineralogy of micron-sized crystals grown in two flooded chalk samples (Liége, Belgium) was successfully investigated by Raman spectroscopy. The drilled chalk cores were flooded with MgCl2 for ca. 1.5 (Long Term Test) and 3 years (Ultra Long Term Test) under North Sea reservoir conditions (Long Term Test: 130 °C, 1 PV/day, 9.3 MPa effective stress; Ultra Long Term Test: 130 °C, varying between 1–3 PV/day, 10.4 MPa effective stress). Raman spectroscopy was able to identify the presence of recrystallized magnesite along the core of the Long Term Test up to 4 cm from the injection surface, down to the crystal size of 1–2 µm. In the Ultra Long Term Test core, the growth of MgCO3 affected nearly the entire core (7 cm). In both samples, no dolomite or high-magnesium calcite secondary growth could be detected when analysing 557 and 90 Raman spectra on the Long and Ultra Long Term Test, respectively. This study can offer Raman spectroscopy as a breakthrough tool in petroleum exploration of unconventional reservoirs, due to its quickness, spatial resolution, and non-destructive acquisition of data. These characteristics would encourage its use coupled with electron microscopes and energy dispersive systems or even electron microprobe studies. Full article
(This article belongs to the Special Issue Optical Spectroscopy of Phosphate, Sulfate and Carbonate Minerals)
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