Composition of Asian dust from cathodoluminescence spectral analysis of single quartz grains

Nagashima, Kana; Nishido, Hirotsugu; Kayama, Masahiro; Kurosaki, Yasunori; Ohgo, Syuhei; Hasegawa, Hitoshi

doi:10.1130/g39237.1

Cited by 6 publications

(11 citation statements)

References 17 publications

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“…The characteristics of these clusters correlated well with those identified by Nagashima et al . 20 using Asian desert samples that overlap with those of the present study. Based on empirical relations between the CL features of quartz particles and those of host-rock types 19 , 22 – 24 , Nagashima et al .…”

Section: Introductionmentioning

confidence: 88%

“…We performed scanning electron microscope–cathodoluminescence (SEM-CL) analysis of single quartz particles in shallow seawater to estimate the dust deposition flux. SEM-CL can detect impurities and native imperfections in quartz that vary with conditions during its formation and subsequent geological background (e.g., metamorphic pressure and temperature) 19 , thus characterising quartz particles from Asian deserts 20 . Based on the identified quartz particles from Asian deserts within the surface mixed layer of the western subarctic Pacific, we calculated the seasonal dust deposition flux into the ocean.…”

Section: Introductionmentioning

confidence: 99%

“…Based on empirical relations between the CL features of quartz particles and those of host-rock types 19 , 22 – 24 , Nagashima et al . 20 interpreted “cluster 1” as characteristic of quartz particles in low-grade metamorphic or slow-cooling high-grade metamorphic rocks, whereas “cluster 2” and “cluster 3” were characteristic of quartz particles in plutonic rocks and volcanic/fast-cooling high-grade metamorphic rocks, respectively. Clusters 1–3 identified by us are similar to their “clusters 1–3” 20 .…”

Section: Introductionmentioning

confidence: 99%

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Asian dust-deposition flux to the subarctic Pacific estimated using single quartz particles

Nagashima,

Kawakami,

Sugie

et al. 2023

Sci Rep

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Iron availability limits marine ecosystem activities in large areas of the ocean. However, the sources and seasonal supply of iron, critically important for controlling surface ocean biogeochemistry and carbon cycling, are poorly understood. The western subarctic Pacific is a high-nutrient and low-chlorophyll region, and despite high concentrations of macronutrients, iron limits phytoplankton production in summer. Here, we determine the seasonal deposition flux of Asian dust using scanning electron microscope–cathodoluminescence analysis of single quartz particles derived from the western subarctic Pacific during 2003–2022 to trace provenance. We found a high (up to 6.9 mg m−2 day−1) deposition flux of Asian dust in May, June, and early July, with an annual average of 1.0 ± 0.2 mg m−2 day−1. The supply of dissolved-iron flux calculated from Asian dust was 0.9 ± 0.3 µg m−2 day−1 during the high productivity season (April–July), which is approximately half that from the deeper part of the ocean, calculated from vertical profiles of dissolved iron. Our study provides a reliable approach for estimating iron supply from dust to the surface ocean that may be critical for sustaining biological productivity under future ocean stratification, which suppresses nutrient supply from the subsurface ocean.

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Section: Introductionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Asian dust-deposition flux to the subarctic Pacific estimated using single quartz particles

Nagashima,

Kawakami,

Sugie

et al. 2023

Sci Rep

Self Cite

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“…There are obvious advantages in using quartz as a provenance tool: not only is it ubiquitous, but also highly resistant to weathering and diagenesis (Goldich, 1938). A number of quartz‐specific petrographic, isotopic, and geochemical provenance methods have been proposed (Ackerson et al., 2015; Bernet & Bassett, 2005; Nagashima et al., 2007, 2017; Shimada et al., 2013). Of these, electron spin resonance (ESR) signal of various defect centers in quartz has been increasingly applied to fingerprint sources in sedimentary settings (Nagashima et al., 2007, 2011; Tissoux et al., 2015; Wei et al., 2020).…”

Section: Introductionmentioning

confidence: 99%

A Novel Proxy for Tracking the Provenance of Dust Based on Paired E₁’‐Peroxy Paramagnetic Defect Centers in Fine‐Grained Quartz

Dave

Timar‐Gabor

Kabacińska

et al. 2022

Geophysical Research Letters

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Identifying the original source rocks of sediments is important for understanding sediment cycling. For aeolian sediments, pinpointing provenance has additional advantages of facilitating the reconstruction of transport pathways that relate to atmospheric circulation, and thereby changes in climate dynamics through time. Aeolian loess deposits have long been recognized as valuable archives of past climates in terrestrial environments (Kukla et al., 1988;Schaetzl et al., 2018). Loess sequences represent long-term accumulation of aeolian dust and thus identifying their provenance provides an important proxy for reconstructing changes in atmospheric circulation through time. A number of established tools are used to identify the source of dust in loess deposits. These include grain-size analysis, in particular grain sorting and end-member modeling, to elucidate transport modes and likely source area types (

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“…Most investigations focus on quartz by virtue of its less complex crystalline framework. Approaches include cathodoluminescence signal spectra deriving from crystalline impurities, which relate to source rock formation [33,34]; electron spin resonance (ESR) signal intensity of luminescence centres, which are thought to reflect source rock age [34,35]; ratios of linearly-modulated optically stimulated luminescence (OSL) components as proxies for formation age [36,37]; and OSL sensitivity measurements as a qualitative indicator of source lithology and transport history [38][39][40][41]. Among these approaches, OSL sensitivity is the quickest to measure and has therefore been favoured in loess studies as a means to rapidly assess potential changes in sediment source down LPS profiles [42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Luminescence Sensitivity of Rhine Valley Loess: Indicators of Source Variability?

et al. 2021

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Loess provides a valuable terrestrial record of past environmental conditions, including the dynamics and trajectories of air mass circulation responsible for dust transport. Here we explore variations in the luminescence sensitivity characteristics of sedimentary quartz and feldspar as possible tools for identifying changes in source down a loess-palaeosol sequence (LPS). Luminescence sensitivity is a rapidly measurable index which is the product of interplay between source lithology and the history of the quartz or feldspar clasts. Variations in sensitivity of down profile may therefore reflect changes in sediment provenance as well as other factors such as weathering through pedogenesis. We undertake an empirical investigation of the luminescence sensitivity of quartz and feldspar from different grain-size fractions from the Schwalbenberg LPS in the German Rhine valley. We compare samples from a 30 m core spanning the last full glacial cycle with samples of oxygen isotope stage (OIS) 3–2 age exposed within nearby profile. We find an overall inverse relationship between quartz and feldspar sensitivity, as well as variability in sensitivity between different quartz grain sizes. Statistical analyses yield a significant correlation between IR50 sensitivity from unprocessed sediments and clay content, and feldspar sensitivity and Si/Al ratios down the core. Since Si/Al ratios may indicate changes in provenance, the latter correlation suggests that IR50 measurements on unprocessed samples may be used to provide a reliable, rapid scan of source variability over millennial timescales.

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Composition of Asian dust from cathodoluminescence spectral analysis of single quartz grains

Cited by 6 publications

References 17 publications

Asian dust-deposition flux to the subarctic Pacific estimated using single quartz particles

Asian dust-deposition flux to the subarctic Pacific estimated using single quartz particles

A Novel Proxy for Tracking the Provenance of Dust Based on Paired E₁’‐Peroxy Paramagnetic Defect Centers in Fine‐Grained Quartz

Luminescence Sensitivity of Rhine Valley Loess: Indicators of Source Variability?

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Composition of Asian dust from cathodoluminescence spectral analysis of single quartz grains

Cited by 6 publications

References 17 publications

Asian dust-deposition flux to the subarctic Pacific estimated using single quartz particles

Asian dust-deposition flux to the subarctic Pacific estimated using single quartz particles

A Novel Proxy for Tracking the Provenance of Dust Based on Paired E1’‐Peroxy Paramagnetic Defect Centers in Fine‐Grained Quartz

Luminescence Sensitivity of Rhine Valley Loess: Indicators of Source Variability?

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A Novel Proxy for Tracking the Provenance of Dust Based on Paired E₁’‐Peroxy Paramagnetic Defect Centers in Fine‐Grained Quartz