Waters associated with the carbonation of ultramafic mine tailings, woodsreef asbestos mine, Australia

H. C. Oskierski, B. Z. Dlugogorski, G. Jacobsen

Research output: Chapter in Book/Report/Conference proceedingConference Paper published in ProceedingsResearchpeer-review

Abstract

The Woodsreef Asbestos Deposit, New South Wales, Australia, is a chrysotile mineralisation hosted in the ultramafic rocks of the Great Serpentinite Belt, predominantly consisting of schistose and massive serpentinite, as well as partially serpentinised harzburgite. Chrysotile has been extracted from the deposit intermittently between 1906 and 1983, producing 24.2 Mt of ultramafic tailings. The tailings result from dry-grinding of chrysotile ore and are stored above ground on an area covering about 0.5 km2.
Extensive carbonate crusts have formed on the tailings pile since the closure of the mine. Natural weathering dissolves Mg-silicate minerals present in the tailings and precipitates Mg-carbonate minerals in the form of crusts and cements. Isotopic signatures of the carbonate minerals (δ13C, δ18O, F14C) indicate that carbonate crusts consisting of hydromagnesite predominantly incorporate CO2 of atmospheric origin. Estimation of the carbonate content has shown that large amounts of CO2 have been sequestered in the tailings at Woodsreef at rates significantly elevated above the background CO2 uptake rate by chemical weathering of coherent silicate rocks. There is potential to further enhance the rates of CO2 sequestration by optimizing the tailings storage for this purpose. Natural weathering of ultramafic tailings thus represents a viable option for low-energy, low-cost sequestration of CO2, directly from the atmosphere.
Since the carbonation of mine tailings during weathering occurs in the aqueous phase additional information on the process can be unlocked by investigating the chemistry and isotopic composition of waters interacting with the tailings. The isotopic composition of these waters also represents an intermediate step in the pathway of the sequestered carbon and can thus serves to better constrain isotopic fractionation during formation of hydrated Mg-carbonates in these settings.
In this contribution we consider the chemistry and isotopic signatures of natural waters that are associated with the carbonation of the tailings of the Woodsreef Asbestos Mine. Measurements of pH, T, conductivity, cation content, δ2H, δ13CDIC, δ18O and F14C of water samples are presented and used to discuss the interaction of these waters with the tailings material
Original languageEnglish
Title of host publication5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015
PublisherAIChE
Pages222
Number of pages1
ISBN (Electronic)9781510815490
Publication statusPublished - 1 Jan 2015
Externally publishedYes
Event5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015 - New York, United States
Duration: 21 Jun 201524 Jun 2015

Publication series

Name5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015

Conference

Conference5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015
CountryUnited States
CityNew York
Period21/06/1524/06/15

Fingerprint

Asbestos mines
Carbonation
Tailings
Water
Carbonates
Serpentine Asbestos
Weathering
Carbonate minerals
Asbestos deposits
Rocks
Silicate minerals
Silicates
Forms (concrete)
Fractionation
Chemical analysis

Cite this

Oskierski, H. C., Dlugogorski, B. Z., & Jacobsen, G. (2015). Waters associated with the carbonation of ultramafic mine tailings, woodsreef asbestos mine, Australia. In 5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015 (pp. 222). (5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015). AIChE.
Oskierski, H. C. ; Dlugogorski, B. Z. ; Jacobsen, G. / Waters associated with the carbonation of ultramafic mine tailings, woodsreef asbestos mine, Australia. 5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015. AIChE, 2015. pp. 222 (5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015).
@inproceedings{6a8b89fc75ee4f158c70c2cead842508,
title = "Waters associated with the carbonation of ultramafic mine tailings, woodsreef asbestos mine, Australia",
abstract = "The Woodsreef Asbestos Deposit, New South Wales, Australia, is a chrysotile mineralisation hosted in the ultramafic rocks of the Great Serpentinite Belt, predominantly consisting of schistose and massive serpentinite, as well as partially serpentinised harzburgite. Chrysotile has been extracted from the deposit intermittently between 1906 and 1983, producing 24.2 Mt of ultramafic tailings. The tailings result from dry-grinding of chrysotile ore and are stored above ground on an area covering about 0.5 km2.Extensive carbonate crusts have formed on the tailings pile since the closure of the mine. Natural weathering dissolves Mg-silicate minerals present in the tailings and precipitates Mg-carbonate minerals in the form of crusts and cements. Isotopic signatures of the carbonate minerals (δ13C, δ18O, F14C) indicate that carbonate crusts consisting of hydromagnesite predominantly incorporate CO2 of atmospheric origin. Estimation of the carbonate content has shown that large amounts of CO2 have been sequestered in the tailings at Woodsreef at rates significantly elevated above the background CO2 uptake rate by chemical weathering of coherent silicate rocks. There is potential to further enhance the rates of CO2 sequestration by optimizing the tailings storage for this purpose. Natural weathering of ultramafic tailings thus represents a viable option for low-energy, low-cost sequestration of CO2, directly from the atmosphere.Since the carbonation of mine tailings during weathering occurs in the aqueous phase additional information on the process can be unlocked by investigating the chemistry and isotopic composition of waters interacting with the tailings. The isotopic composition of these waters also represents an intermediate step in the pathway of the sequestered carbon and can thus serves to better constrain isotopic fractionation during formation of hydrated Mg-carbonates in these settings.In this contribution we consider the chemistry and isotopic signatures of natural waters that are associated with the carbonation of the tailings of the Woodsreef Asbestos Mine. Measurements of pH, T, conductivity, cation content, δ2H, δ13CDIC, δ18O and F14C of water samples are presented and used to discuss the interaction of these waters with the tailings material",
author = "Oskierski, {H. C.} and Dlugogorski, {B. Z.} and G. Jacobsen",
year = "2015",
month = "1",
day = "1",
language = "English",
series = "5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015",
publisher = "AIChE",
pages = "222",
booktitle = "5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015",

}

Oskierski, HC, Dlugogorski, BZ & Jacobsen, G 2015, Waters associated with the carbonation of ultramafic mine tailings, woodsreef asbestos mine, Australia. in 5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015. 5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015, AIChE, pp. 222, 5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015, New York, United States, 21/06/15.

Waters associated with the carbonation of ultramafic mine tailings, woodsreef asbestos mine, Australia. / Oskierski, H. C.; Dlugogorski, B. Z.; Jacobsen, G.

5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015. AIChE, 2015. p. 222 (5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015).

Research output: Chapter in Book/Report/Conference proceedingConference Paper published in ProceedingsResearchpeer-review

TY - GEN

T1 - Waters associated with the carbonation of ultramafic mine tailings, woodsreef asbestos mine, Australia

AU - Oskierski, H. C.

AU - Dlugogorski, B. Z.

AU - Jacobsen, G.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - The Woodsreef Asbestos Deposit, New South Wales, Australia, is a chrysotile mineralisation hosted in the ultramafic rocks of the Great Serpentinite Belt, predominantly consisting of schistose and massive serpentinite, as well as partially serpentinised harzburgite. Chrysotile has been extracted from the deposit intermittently between 1906 and 1983, producing 24.2 Mt of ultramafic tailings. The tailings result from dry-grinding of chrysotile ore and are stored above ground on an area covering about 0.5 km2.Extensive carbonate crusts have formed on the tailings pile since the closure of the mine. Natural weathering dissolves Mg-silicate minerals present in the tailings and precipitates Mg-carbonate minerals in the form of crusts and cements. Isotopic signatures of the carbonate minerals (δ13C, δ18O, F14C) indicate that carbonate crusts consisting of hydromagnesite predominantly incorporate CO2 of atmospheric origin. Estimation of the carbonate content has shown that large amounts of CO2 have been sequestered in the tailings at Woodsreef at rates significantly elevated above the background CO2 uptake rate by chemical weathering of coherent silicate rocks. There is potential to further enhance the rates of CO2 sequestration by optimizing the tailings storage for this purpose. Natural weathering of ultramafic tailings thus represents a viable option for low-energy, low-cost sequestration of CO2, directly from the atmosphere.Since the carbonation of mine tailings during weathering occurs in the aqueous phase additional information on the process can be unlocked by investigating the chemistry and isotopic composition of waters interacting with the tailings. The isotopic composition of these waters also represents an intermediate step in the pathway of the sequestered carbon and can thus serves to better constrain isotopic fractionation during formation of hydrated Mg-carbonates in these settings.In this contribution we consider the chemistry and isotopic signatures of natural waters that are associated with the carbonation of the tailings of the Woodsreef Asbestos Mine. Measurements of pH, T, conductivity, cation content, δ2H, δ13CDIC, δ18O and F14C of water samples are presented and used to discuss the interaction of these waters with the tailings material

AB - The Woodsreef Asbestos Deposit, New South Wales, Australia, is a chrysotile mineralisation hosted in the ultramafic rocks of the Great Serpentinite Belt, predominantly consisting of schistose and massive serpentinite, as well as partially serpentinised harzburgite. Chrysotile has been extracted from the deposit intermittently between 1906 and 1983, producing 24.2 Mt of ultramafic tailings. The tailings result from dry-grinding of chrysotile ore and are stored above ground on an area covering about 0.5 km2.Extensive carbonate crusts have formed on the tailings pile since the closure of the mine. Natural weathering dissolves Mg-silicate minerals present in the tailings and precipitates Mg-carbonate minerals in the form of crusts and cements. Isotopic signatures of the carbonate minerals (δ13C, δ18O, F14C) indicate that carbonate crusts consisting of hydromagnesite predominantly incorporate CO2 of atmospheric origin. Estimation of the carbonate content has shown that large amounts of CO2 have been sequestered in the tailings at Woodsreef at rates significantly elevated above the background CO2 uptake rate by chemical weathering of coherent silicate rocks. There is potential to further enhance the rates of CO2 sequestration by optimizing the tailings storage for this purpose. Natural weathering of ultramafic tailings thus represents a viable option for low-energy, low-cost sequestration of CO2, directly from the atmosphere.Since the carbonation of mine tailings during weathering occurs in the aqueous phase additional information on the process can be unlocked by investigating the chemistry and isotopic composition of waters interacting with the tailings. The isotopic composition of these waters also represents an intermediate step in the pathway of the sequestered carbon and can thus serves to better constrain isotopic fractionation during formation of hydrated Mg-carbonates in these settings.In this contribution we consider the chemistry and isotopic signatures of natural waters that are associated with the carbonation of the tailings of the Woodsreef Asbestos Mine. Measurements of pH, T, conductivity, cation content, δ2H, δ13CDIC, δ18O and F14C of water samples are presented and used to discuss the interaction of these waters with the tailings material

UR - http://www.scopus.com/inward/record.url?scp=84964844332&partnerID=8YFLogxK

UR - https://researchrepository.murdoch.edu.au/id/eprint/31090/

UR - http://toc.proceedings.com/28625webtoc.pdf

M3 - Conference Paper published in Proceedings

T3 - 5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015

SP - 222

BT - 5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015

PB - AIChE

ER -

Oskierski HC, Dlugogorski BZ, Jacobsen G. Waters associated with the carbonation of ultramafic mine tailings, woodsreef asbestos mine, Australia. In 5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015. AIChE. 2015. p. 222. (5th International Conference on Accelerated Carbonation for Environmental and Material Engineering 2015).