Temporal variability in the chemical weathering of Ca2+-bearing phases in the Loch Vale watershed, Colorado, USA: A mass-balance approach

Price, James E.; Peresolak, Katherine; Brice, Rebecca L.; Tefend, Karen S.

doi:10.1016/j.chemgeo.2013.02.001

Cited by 11 publications

(14 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More complex approaches have attempted to account for changes in soil and biomass pools, as well as to measure leaching, but a general feature of mass-30 balance approaches is that weathering rates are derived from the sum of inputs and outputs into other pools in the system. Models have been developed to describe increasingly complex sets of processes, as well as to apportion calculated weathering fluxes into individual contributing mineral species (Price et al, 2013). Meta-analysis across large numbers of studies Biogeosciences Discuss., https://doi.org /10.5194/bg-2019-41 Manuscript under review for journal Biogeosciences Discussion started: 18 February 2019 c Author(s) 2019.…”

mentioning

confidence: 99%

Biological weathering and its consequences at different spatial levels – from nanoscale to global scale

Finlay

Mahmood

Rosenstock

et al. 2019

Preprint

View full text Add to dashboard Cite

Abstract. Plant nutrients can be recycled through microbial decomposition of organic matter but replacement of base cations and phosphorus, lost through harvesting of biomass/biofuels or leaching, requires de novo supply of fresh nutrients released through weathering of soil parent material (minerals and rocks). Weathering involves physical and chemical processes that are modified by biological activity of plants, microorganisms and animals. This article reviews recent progress made in understanding biological processes contributing to weathering. A perspective of increasing spatial scale is adopted, examining the consequences of biological activity for weathering from nanoscale interactions, through in vitro and in planta microcosm and mesocosm studies, to field experiments and finally, ecosystem and global level effects. The topics discussed include: the physical alteration of minerals and mineral surfaces, the composition, amounts, chemical properties and effects of plant and microbial secretions, and the role of carbon flow (including stabilization/sequestration of C in organic and inorganic forms). Although the predominant focus is on the effects of fungi in forest ecosystems, the properties of biofilms, including bacterial interactions, are discussed. The implications of these biological processes for modelling are discussed and finally, we attempt to identify some key questions and knowledge gaps, as well as experimental approaches and areas of research in which future studies are likely to yield useful results. A particular focus of this article is to improve the representation of the ways in which biological processes complement physical and chemical processes that mobilize mineral elements, making them available for plant uptake. This is necessary to produce better estimates of weathering that are necessary for sustainable management of forests in a post-fossil fuel economy. While there are abundant examples of nm- and &#181;m-scale physical interactions between microorganisms and different minerals, opinion appears to be divided with respect to the quantitative significance of these observations to overall weathering. Numerous in vitro experiments and microcosm studies involving plants and their associated microorganisms suggest that the allocation of plant-derived carbon, mineral dissolution and plant nutrient status are tightly coupled but there is still disagreement about the extent to which these processes contribute to field-scale observations. Apart from providing dynamically responsive pathways for the allocation of plant-derived carbon to power dissolution of minerals, mycorrhizal mycelia provide conduits for the long-distance transportation of weathering products back to plants that are also quantitatively significant sinks for released nutrients. These mycelial pathways bridge heterogeneous substrates, reducing the influence of local variation in C&#8201;:&#8201;N ratios. The production of polysaccharide matrices by biofilms of interacting bacteria and/or fungi at interfaces with mineral surfaces and roots, influences patterns of production of antibiotics and quorum sensing molecules, with concomitant effects on microbial community structure, and the qualitative and quantitative composition of mineral solubilizing compounds and weathering products. Patterns of carbon allocation and nutrient mobilization from both organic and inorganic substrates have been studied at larger spatial and temporal scales, including both ecosystem and global levels and there is a generally wider degree of acceptance of the "systemic" effects of microorganisms on patterns of nutrient mobilization. Theories about the evolutionary development of weathering processes have been advanced but there is still a lack of information connecting processes at different spatial scales and detailed studies of the liquid chemistry of local weathering sites at the &#181;m-scale, together with up-scaling to soil-scale dissolution rates, are advocated, as well as new approaches involving stable isotopes.

show abstract

mentioning

confidence: 99%

Biological weathering and its consequences at different spatial levels – from nanoscale to global scale

Finlay

Mahmood

Rosenstock

et al. 2019

Preprint

View full text Add to dashboard Cite

show abstract

“…A monazite weathering rate also was not calculated using Ce because of its potential oxidation at the earth’s surface and fractionation from solution to the solid phase. Monazite weathering rates are approximately three orders of magnitude lower than weathering rates of other primary minerals in the LVW (Mast et al, 1990; Mast, 1992; Price et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

“…1). Between 1984 and 2008, mean annual precipitation in the LVW was 98 cm/yr (data of the National Atmospheric Deposition Program), and the mean annual temperature was 1.4 °C (data available at ) (Price et al, 2013). More than 70% of precipitation occurred as snow with spring snowmelt being the major annual hydrologic event within the watershed.…”

Section: Site Descriptionmentioning

confidence: 99%

Monazite chemical weathering, rare earth element behavior, and paleoglaciohydrology since the last glacial maximum for the Loch Vale watershed, Colorado, USA

Price¹,

Moore

Kerans³

2017

Quat. res.

Self Cite

View full text Add to dashboard Cite

Rare earth element (REE) release from weathering of accessory monazite [(REE)PO4] since the last glacial maximum at 18.1 ka was investigated in sediment recovered from an outlet lake within the glaciated Loch Vale watershed, Colorado, USA. Labile REEs in the sediments reveal monazite weathering increased during the Younger Dryas chronozone (YDC) 13.2 to 11.1 ka when alpine glaciers advanced as climate cooled and bedrock comminution increased. Monazite dissolution peaked at approximately the Pleistocene-Holocene transition ~10.5 ka. During the Holocene, REE concentrations decline, reflecting a reduction in monazite weathering. The REE cerium (Ce) may occur as trivalent or tetravalent cations, and the Ce anomaly (Cen/Ce*n) in sediment permits interpretations of paleoredox conditions. The Cen/Ce*n decreases from 18.1 ka to the Pleistocene-Holocene boundary. Initially, oxidizing conditions within the watershed increased because of enlargement of the proglacial area as the ice retreated. At the onset of the YDC, oxidation further escalated in response to enhanced chemical weathering associated with glacial advance. A more stable Holocene climate and landscape resulted in relatively small changes in Cen/Ce*n values. Slightly decreasing Cen/Ce*n values over the last several hundred years are consistent with present-day stream water values and may reflect the onset of present-day hydrobiogeochemical conditions.

show abstract

“…Accessory minerals are relatively scarce, may exhibit relatively small grain sizes (e.g., Price et al, 2005a), are potentially highly reactive (e.g., Drever, 1997;Oliva et al, 2004;Schulte et al, 2011;and references within), and often heterogeneously distributed within bedrock and associated genetically related regolith if not completely dissolved beneath a weathering front (e.g., Price et al, 2008Price et al, , 2013. Heterogeneous distributions of accessory minerals may easily result in sampling biases whereby important mineral dissolution is not recognized.…”

Section: Introductionmentioning

confidence: 98%

“…Although many studies of highly reactive accessory minerals during chemical weathering address the dissolution of carbonate (e.g., Garrels and Mackenzie, 1967;Mast, 1992;Velbel, 1992;Blum et al, 1998;White et al, 1999White et al, , 2001White et al, , 2005Taylor et al, 2000a,b;Mavris et al, 2010) and phosphate minerals (e.g., Probst et al, 2000;Aubert et al, 2001Aubert et al, , 2002Aubert et al, , 2004Blum et al, 2002;Oliva et al, 2004;Hausrath et al, 2011;Price et al, 2013), the solubility of the calc-silicate minerals amphibole (e.g., Berner et al, 1980;Berner and Schott, 1982;Oliva et al, 2004), sphene (Braun et al, 2009), and epidote-group (e.g., Watson, 1917;Oliva et al, 2004;Price et al, 2005aPrice et al, ,b, 2008 are also reported. Sphene and epidote-group minerals typically host the radioactinides 232 Th, 238 U, and 235 U and are used as geochronometers (e.g., Tilton and Grunenfelder, 1968;Tucker et al, 1987Tucker et al, , 2004von Blanckenburg, 1992;Barth et al, 1994;Catlos et al, 2000;Oberli et al, 2004;Chew et al, 2011;Spencer et al, 2013;Smye et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Predicting radioactive accessory mineral dissolution during chemical weathering: The radiation dose at the solubility threshold for epidote-group detrital grains from the Yangtze River delta, China

Price¹,

Wilton²,

Tubrett³

et al. 2015

Chemical Geology

Self Cite

View full text Add to dashboard Cite

Temporal variability in the chemical weathering of Ca2+-bearing phases in the Loch Vale watershed, Colorado, USA: A mass-balance approach

Cited by 11 publications

References 40 publications

Biological weathering and its consequences at different spatial levels – from nanoscale to global scale

Biological weathering and its consequences at different spatial levels – from nanoscale to global scale

Monazite chemical weathering, rare earth element behavior, and paleoglaciohydrology since the last glacial maximum for the Loch Vale watershed, Colorado, USA

Predicting radioactive accessory mineral dissolution during chemical weathering: The radiation dose at the solubility threshold for epidote-group detrital grains from the Yangtze River delta, China

Contact Info

Product

Resources

About