Quantifying the controlling mineral phases of rare-earth elements in deep-sea pelagic sediments

Liao, Jianlin; Chen, Jieyun; Sun, Xiaoming; Wu, Zhongwei; Deng, Yue; Shi, Xuefa; Wang, Yanjingyu; Chen, Yuxi; Koschinsky, Andrea

doi:10.1016/j.chemgeo.2022.120792

Cited by 31 publications

(37 citation statements)

References 123 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In any case, the 1M hydroxylamine-HCl soluble fraction accounted for only 10%-16% of the total REY in the analyzed samples. Our estimate is similar to the previous estimate from the vicinity (2%-20% of the total REY; Paul, Volz, et al, 2019) and slightly higher than those from the Central Indian Ocean Basin and southeastern Pacific Tiki Basin (1%-9%; Liao et al, 2022).…”

Section: Discussionsupporting

confidence: 90%

“…In the sequential extraction, step 2 targeting Mn‐oxides leached <10% of the total leachable REY in sediments, except for Ce (Table ). Previous studies from different oceans have estimated the contribution of 3%–23% of the total REY in sediments for micronodules (Liao et al., 2022; Liao, Sun, Wu, et al., 2019; Zhou et al., 2020, 2021). Our experimental results indicate a contribution of up to 7%–21% of Ce and 2%–9% of the rest REY from Mn‐oxides, the primary component of micronodules.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Distribution of Rare Earth Elements and Yttrium in Sediments From the Clarion‐Clipperton Fracture Zone, Northeastern Pacific Ocean

Kim

Hyeong

Yoo

2022

Geochem Geophys Geosyst

View full text Add to dashboard Cite

Deep‐sea sediments enriched in rare earth elements and yttrium (REY) are attracting scientific and exploration attention as a new REY resource. In the Clarion‐Clipperton Fracture Zone (CCFZ) of the northeastern Pacific, sedimentary units with high REY contents (average REY content >700 ppm) occur sporadically at only a few decimeters beneath the sediment surface covered with polymetallic nodules. Here we report the results of bulk chemical and sequential extraction analyses of sediment cores containing these units, collected from the southeastern part of the CCFZ. Correlations between element contents and shale‐normalized REY patterns suggest that the REY are associated primarily with calcium phosphates. Sequential extraction to determine the contribution from different sedimentary components confirms that calcium phosphates contain >70% of trivalent REY in REY‐enriched units. Despite the study location being favorable for nodule formation and subject to distal hydrothermal plume fallout, only subordinate amounts of REY are hosted by Mn‐ and Fe‐(oxyhydr)oxides. Hydrothermal Fe‐(oxyhydr)oxides may have played a more important role in accumulating REY, as evidence suggest that large amounts of Fe‐(oxyhydr)oxides have been transformed into Fe‐rich smectite during early diagenesis of REY‐enriched units.

show abstract

Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Distribution of Rare Earth Elements and Yttrium in Sediments From the Clarion‐Clipperton Fracture Zone, Northeastern Pacific Ocean

Kim

Hyeong

Yoo

2022

Geochem Geophys Geosyst

View full text Add to dashboard Cite

show abstract

“…The mechanism that leads to the removal of dissolved Ce from deep pore water under oxic-suboxic conditions remains unclear. Considering that there is little redox-related modification, the change of Ce/Ce* values is not only caused by the changing concentration of dissolved Ce but also caused by variations in the concentrations of the other REY ( 9 ). The variability of Ce/Ce* values can be explained by a mineralogical control ( 42 ), because the trivalent REY is linked to phosphate or Fe phases, while Ce are likely associated with Mn phases ( 8 , 42 ).…”

Section: Discussionmentioning

confidence: 99%

“…The most HREE-rich materials in the world are deep-sea sediments (termed REY-rich muds) (4)(5)(6). These deposits are not only currently identified in the Pacific (4)(5)(6)(7)(8) but recently also reported from the Indian (9) and northern Atlantic (10) oceans.…”

Section: Introductionmentioning

confidence: 99%

“…The types of apatite in marine sediments are bioapatite (fish debris, i.e., teeth and bones) ( 7 ), authigenic carbonate fluorapatite, and detrital apatite (igneous or metamorphic origin) ( 12 , 13 ). Although bioapatite is not super abundant in the sediments, it can hold at least ~69% of the total REY of REY-rich muds in the Pacific ( 9 ). Authigenic carbonate fluorapatite could also be responsible for REY enrichments in sediment, but this only occurs in limited geological settings such as near to mid-ocean ridges ( 5 ).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Early diagenetic control on the enrichment and fractionation of rare earth elements in deep-sea sediments

et al. 2022

Self Cite

View full text Add to dashboard Cite

The rare earth elements and yttrium (REY) in bioapatite from deep-sea sediments are potential proxies for reconstructing paleoenvironmental conditions. However, the REY enrichment mechanism and the reliability of this tracer remain elusive because of the lack of key information from ambient pore water. Here, we report high-resolution geochemical data for pore water, bottom water, and bioapatite from deep-sea sites in the western Pacific. Our results reveal that the benthic flux of REY from the deep sea is less substantial than from the shallow marine realm, resulting in REY-rich sediment. The depth distribution of REY in pore water is opposite to that of bioapatite, and REY patterns and neodymium isotopic compositions are not uniformly distributed within bioapatite. These results indicate alteration of REY and neodymium isotopic compositions during early diagenesis. Therefore, we infer that REY from bioapatite are not robust recorders of the deep marine environment through Earth’s history.

show abstract

Essential processes involving REE-enrichment in biogenic apatite in deep-sea sediment decoded via multivariate statistical analyses

et al. 2022

View full text Add to dashboard Cite

Quantifying the controlling mineral phases of rare-earth elements in deep-sea pelagic sediments

Cited by 31 publications

References 123 publications

Distribution of Rare Earth Elements and Yttrium in Sediments From the Clarion‐Clipperton Fracture Zone, Northeastern Pacific Ocean

Distribution of Rare Earth Elements and Yttrium in Sediments From the Clarion‐Clipperton Fracture Zone, Northeastern Pacific Ocean

Early diagenetic control on the enrichment and fractionation of rare earth elements in deep-sea sediments

Essential processes involving REE-enrichment in biogenic apatite in deep-sea sediment decoded via multivariate statistical analyses

Contact Info

Product

Resources

About