Mineralogical Analysis of the Soils of the Maritime Provinces

Brydon, J. E.

doi:10.4141/cjss58-024

Cited by 8 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The parent material of these soils is Beaver River Till which is a glacial till with a sandy texture characterized by >90% local clast lithology within the Meguma Terrane (Supergroup) of Nova Scotia [ 65 ]. Clay at both Young and Mature sites is predominantly illite with traces of chlorite, vermiculite and kaolinite [ 66 ].…”

Section: Methodsmentioning

confidence: 99%

Examining mineral-associated soil organic matter pools through depth in harvested forest soil profiles

2018

View full text Add to dashboard Cite

Mineral-associated organic matter is associated with a suite of soil minerals that can confer stability, resulting in the potential for long-term storage of carbon (C). Not all interactions impart the same level of protection, however; evidence is suggesting that C in certain mineral pools is dynamic and vulnerable to disturbance in the decades following harvesting. The objective of this research was to describe and characterize organic matter-mineral interactions through depth in horizons of soils of contrasting stand age. Sequential selective dissolutions representing increasingly stable mineral-associated organic matter pools from water soluble minerals (deionized water), organo-metal complexes (Na-pyrophosphate), poorly-crystalline minerals (HCl hydroxylamine), and crystalline secondary minerals (Na-dithionite HCl)) were carried out for Ae, Bf and BC horizons sampled from a Young and Mature forest site (35 and 110 years post-harvest) in Mooseland, Nova Scotia, Canada. Sequential selective dissolution extracts were analyzed for C, δ13C, iron (Fe) and aluminum (Al). Organo-metal complexes (OMC) were the largest mineral-associated OM pool in all horizons. This pool dominated the C distribution in B horizons (~60–70% of Bf bulk C), with a minor contribution from poorly-crystalline (PCrys), crystalline (Crys) minerals and water soluble (WS) associations. C in OMC and PCrys pools explained the variation in bulk C in horizons through depth at both sites. Twice as much C in OMC pools was measured at the Mature site compared to the Young site in the Bf horizons, supported by higher C:(Fe+Al) ratios. Isotopic analysis indicated that this extraction procedure isolated distinct mineral-associated OM pools. δ13C signatures of pyrophosphate-extracted OMC pools ranged from -27‰ to -28‰, similar to δ13C of bulk C and to plant-derived humic acids and associated biomass. The water soluble phase (mean δ13C = -29 ‰) was up to 2 ‰ more depleted, whereas the δ13C of Crys pools were more enriched in 13C (-13‰ to -16 ‰) compared to bulk soil. The results from this study suggest that association with minerals does not necessarily confer stability: organo-metal pools dominate in podzol horizons through depth, and contribute most to C storage, but are potentially susceptible to destabilization following the physical changes resulting from forest harvesting disturbance.

show abstract

Section: Methodsmentioning

confidence: 99%

Examining mineral-associated soil organic matter pools through depth in harvested forest soil profiles

2018

View full text Add to dashboard Cite

show abstract

“…Continuing fault movement along the Minas Fault Zone is assumed for the Permian and clearly demonstrable for the Triassic (particularly late Triassic) and early Cretaceous [43]. Kaolinite is unlikely under arid conditions in the Permian, but has been recorded in both Triassic and particularly Cretaceous mudstones [44]. Fluids favouring precipitation of chlorite could be related to the North Mountain Basalt of late Triassic age [43].…”

Section: Events Younger Than the Barite Veinsmentioning

confidence: 98%

Controls on Barite Mineralization in a Major Intracontinental Shear Zone: Carboniferous of the Cobequid Highlands, Nova Scotia

Pe‐Piper

Piper

2021

Minerals

View full text Add to dashboard Cite

Prominent veins of late Carboniferous barite, associated with fluorite and calcite, outcrop close to older granite plutons along an intracontinental shear zone that was active throughout the Carboniferous in southeastern Canada. Some barite is stratigraphically constrained to younger than 315 Ma and final mineralization is constrained by a published Rb–Sr isochron of 300 ± 6 Ma. Barite occurrences in the Carboniferous basins of central Nova Scotia, 50 km to the south, are synchronous with or post-date ankerite-siderite-magnetite-pyrolusite and Pb-Zn mineralization, which was facilitated by fluid interaction with thick evaporites. This study aims to determine controls on the distribution of barite in the shear zone, from field relationships, vein petrography and isotope geochemistry of minerals. The isotope chemistry of shear zone barite is similar to that occurring in Pb-Zn-Mn-Ba mineralization to the south, suggesting a common origin. Veins of barite, associated with fluorite, represent the youngest and regionally coolest phase of a 70 Ma history of Carboniferous mineralized veins along the Minas Fault Zone. Their prominence close to granite plutons reflects brittle deformation of the deeply-rooted granites in a complexly deforming fault zone, but the origin of abundant F remains uncertain.

show abstract

“…The soils at these six sites have relatively low cation exchange capacities (10-13 cmol[+]/kg), suggesting the potential for increased 137 Cs activity. However, the clay mineralogy of these soils is dominated by illite, chloride, vermiculite and mixed layer clays with only trace amount of kaolinite [19], The clay mineralogy of these soils would suggest soil regimes that would promote 'fixation' of 137 Cs to soil particles (see, e.g., [3,4]). Soil forming processes at these sites are dominated by podzolization and associated within profile translocations of iron and aluminum oxides in association with humic and fulvic acids and intrasolum translocation of clays [20],…”

Section: Modellingmentioning

confidence: 99%

The Depth Distribution of ¹³⁷Cs in Non-eroded Soil Profiles, Annapolis Valley, Nova Scotia, Canada

Brewster

Astatkie

1999

Radiochimica Acta

View full text Add to dashboard Cite

Radionuclides / Environmental monitoring / Soil profiles / Exponential model / Nested regression SummaryA study was conducted in the Annapolis Valley, Nova Scotia, Canada to determine I37 Cs loading values and its depth distribution as part of a concurrent soil erosion study. Samples were collected from soil profiles at six sites which differed in soil texture, drainage class, and parent material type over an area of 25 km 2 . These sites were located in old apple orchards (established prior to 1930), and soil samples were collected at 2 cm increments from 0-30 cm and at 5 cm increments from 30-50 cm. Results indicate three characteristic depth distribution patterns, and considerable variation in 137 Cs loading values. The exponential regression model and nested regression modelling were shown to have great utility in modelling ,37 Cs loadings, and comparing different sites with respect to their peak 137 Cs loading and the rate in which the loading declines with depth.

show abstract

Mineralogical Analysis of the Soils of the Maritime Provinces

Abstract: ABSTRACT

Cited by 8 publications

References 2 publications

Examining mineral-associated soil organic matter pools through depth in harvested forest soil profiles

Examining mineral-associated soil organic matter pools through depth in harvested forest soil profiles

Controls on Barite Mineralization in a Major Intracontinental Shear Zone: Carboniferous of the Cobequid Highlands, Nova Scotia

The Depth Distribution of ¹³⁷Cs in Non-eroded Soil Profiles, Annapolis Valley, Nova Scotia, Canada

Contact Info

Product

Resources

About

Mineralogical Analysis of the Soils of the Maritime Provinces

Abstract: ABSTRACT

Cited by 8 publications

References 2 publications

Examining mineral-associated soil organic matter pools through depth in harvested forest soil profiles

Examining mineral-associated soil organic matter pools through depth in harvested forest soil profiles

Controls on Barite Mineralization in a Major Intracontinental Shear Zone: Carboniferous of the Cobequid Highlands, Nova Scotia

The Depth Distribution of 137Cs in Non-eroded Soil Profiles, Annapolis Valley, Nova Scotia, Canada

Contact Info

Product

Resources

About

The Depth Distribution of ¹³⁷Cs in Non-eroded Soil Profiles, Annapolis Valley, Nova Scotia, Canada