W- and M-type tetrad effects in REE patterns for water–rock systems in the Tono uranium deposit, central Japan

Takahashi, Yoshio; Yoshida, Hidekazu; Sato, Nana; Hama, Katsuhiro; Yusa, Yasuhisa; Shimizu, Hiroshi

doi:10.1016/s0009-2541(01)00388-6

Cited by 143 publications

(86 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this study, Y was also determined as well as the lanthanoids. The loss of REE during decomposition, evaporation and redissolution processes is negligible as suggested by results from rock samples treated in the same way (Takahashi et al, 2002).…”

Section: Methodsmentioning

confidence: 72%

See 1 more Smart Citation

Abundances of rare earth elements in crude oils and their partitions in water

et al. 2010

Self Cite

View full text Add to dashboard Cite

Section: Methodsmentioning

confidence: 72%

“…Since concentrations of some REE in groundwater are generally lower than ppt level, REE were pre-concentrated using a column (diameter 1.0 cm, length: 10 cm) loaded with a cation exchange resin AG50W-X8 (Takahashi et al, 2002). About 250 mL of weighed sample was introduced into the column.…”

Section: Methodsmentioning

confidence: 99%

Abundances of rare earth elements in crude oils and their partitions in water

et al. 2010

Self Cite

View full text Add to dashboard Cite

“…Recently, Zhao et al [46] reported an alkaline syenite with composite M-and W-type REE patterns. Now the REE tetrad effect can be considered to be caused by [47]: (1) fractionated accessory minerals containing different REE contents at a late stage of magmatic evolution [48,49], (2) the weathering near the surface [45,50], (3) fluids-melts interaction in the open system [51][52][53], and (4) granites suffering alteration by exsolved fluids separated from magmas with fluids-melts immiscibility [54]. Rayleigh model-based calculation suggests that REE tetrad effect stemming from the fractionation of accessory minerals needs an unreasonable accessory mineral assemblage [52,55].…”

Section: Tetrad Effect In Ree Pattern and Highly Evolved Granitesmentioning

confidence: 99%

“…In addition, the fractionated accessory minerals usually have "M" type REE patterns that are consistent with their host granites, rather than complementary "W" type REE patterns. Takahashi et al [50] studied the water-rock systems in the Tono uranium deposit, central Japan, where the surface water inducing weathering of granites has "W" type REE patterns, whereas the residual weathered granites exhibit "M" type REE tetrad effects, and thus they concluded that the weathering may be the reason why granites exhibit tetrad effects in REE partern. However, given extremely low REE contents in the fluids, the "W" type tetrad effects are likely generated by analysis errors [56,57].…”

Section: Tetrad Effect In Ree Pattern and Highly Evolved Granitesmentioning

confidence: 99%

Petrogenesis of early Yanshanian highly evolved granites in the Longyuanba area, southern Jiangxi Province: Evidence from zircon U-Pb dating, Hf-O isotope and whole-rock geochemistry

Tao

et al. 2013

Sci. China Earth Sci.

View full text Add to dashboard Cite

Early Yanshanian (Jurassic) granitoids are widespread in the Nanling Range, South China. Whereas large granitic batholiths commonly crop out in the center of the Nanling Range (corresponding geographically to the central and northern parts of Guangdong Province), many small stocks occur in the southern part of Jiangxi Province. Most of the small stocks are associated closely with economically significant rare-metal deposits (W, Sn, Nb, Ta). Here we report the results for biotite granites and two-mica granites from three Yanshanian stocks of the Longyuanba complex. LA-ICPMS U-Pb dating of zircon yields an age of 156.1±2.1 Ma for Xiaomubei biotite granite, and U-Pb zircon dating using SIMS yields an age of 156.7±1.2 Ma for Longyuanba-Chengjiang biotite granite and 156.4±1.3 Ma for Jiangtoudong two-mica granite. Biotite granites are silica-rich (SiO 2 =70%-79%), potassic (K 2 O/Na 2 O>1.9), and peraluminous (ASI=1.05-1.33). Associated samples are invariably enriched in Rb, Th, Pb and LREE, yet depleted in Ba, Nb, Sr, P and Ti, and their REE pattern shows a large fractionation between LREE and HREE ((La/Yb) N =10.7-13.5) and a pronounced Eu negative anomaly (δEu=0.28-0.41). Two-mica granite samples are also silica-rich (SiO 2 =75%-79%), potassic (K 2 O/Na 2 O>1.2), and peraluminous (ASI=1.09-1.17). However, in contrast to the biotite granites, they are more enriched in Rb, Th, Pb and extremely depleted in Ba, Nb, Sr, P and Ti, and exhibit nearly flat ((La/Yb) N =0.75-1.08) chondrite-normalized REE patterns characterized by strong Eu depletion (δEu=0.02-0.04) and clear tetrad effect (TE 1.3 =1.10-1.14). Biotite granites and two-mica granties have comparable Nd isotopic signatures, and their εNd(t) are concentrated in the 13.0 to 9.6 and 11.5 to 7.7 respectively. Their zircon Hf-O isotopes of both also show similarity (biotite granites: εHf(t)=10.8-7.9, δ 18 O=7.98‰-8.89‰ and εHf(t)= 13.8 to 9.1, δ 18 O=8.31‰-10.08‰; two-mica granites: εHf(t)=11.3 to 8.0, δ 18 O=7.91‰-9.77‰). The results show that both biotite and two-mica granites were derived mainly from sedimentary source rocks with a minor contribution from mantle-derived materials. In spite of some S-type characteristics, the biotite granites were formed by fractional crystallization of I-type magma and assimilation of peraluminous sedimentary rocks during their ascent to the surface. Therefore, they belong to highly fractionated I-type granites. Two-mica granites exhibit a tetrad effect in their REE patterns, but share the same isotopic features with the biotite granites, suggesting that they are highly fractionated I-type granites as well. Their Lanthanide tetrad effects may be attributed to the hydrothermal alteration by magmatic fluids that have suffered degassing at late stages. Granitic magmas undergoing fractional crystallization and wall-rock assilimation can generate highly evolved granites with no REE tetrad effect in the uni-phase system. However, in the late-stage of magmatic evolution in the multi-phase system (i.e., magmatic-hydrothermal s...

show abstract

“…Studies concerning the release of YREEs during rockwater interaction are scarce (Bau et al, 1998;Sholkovitz et al, 1999: Takahashi et al, 2002Bau et al, 2004), and there is little data on the processes that regulate the alteration of volcanic materials at low temperature and in seawater (e.g. Pichler et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

Alteration effects of volcanic ash in seawater: Anomalous Y/Ho ratios in coastal waters of the Central Mediterranean sea

Censi

Sprovieri

Larocca

et al. 2007

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

This paper presents the results of a study based on data collected during the oceanographic cruise ANSIC 2001 carried out in the Ionian Sea during the explosive activity of Mount Etna in the summer of 2001. Anomalous low values of Y/Ho ratios in seawater suggest extensive scavenging processes on the surfaces of smectitic alteration products, with Y and Ho fractionation controlled by the differences in their electronic configurations and behaviour during solution/surface complexation equilibria. These processes can also be traced through the presence of significant tetrad effects recorded in the chondrite-normalised Rare Earth Elements and Yttrium (YREEs) patterns of suspended particulate matter. This suggests that the preferential Y scavenging from seawater is due to the formation of inner-sphere complexes with OH À groups on montmorillonite crystal surfaces. The preliminary results of kinetic experiments of YREE released from volcanic ash to coexisting seawater, and the related effects on Y/Ho ratios and Ce anomalies, are consistent with the fractionation of Light Rare Earth Elements (LREEs) with respect to Heavy Rare Earth Elements (HREEs) observed in dissolved phase. They suggest a behaviour of Y similar to that reported for LREEs, particularly for Ce and Pr.

show abstract

W- and M-type tetrad effects in REE patterns for water–rock systems in the Tono uranium deposit, central Japan

Cited by 143 publications

References 51 publications

Abundances of rare earth elements in crude oils and their partitions in water

Abundances of rare earth elements in crude oils and their partitions in water

Petrogenesis of early Yanshanian highly evolved granites in the Longyuanba area, southern Jiangxi Province: Evidence from zircon U-Pb dating, Hf-O isotope and whole-rock geochemistry

Alteration effects of volcanic ash in seawater: Anomalous Y/Ho ratios in coastal waters of the Central Mediterranean sea

Contact Info

Product

Resources

About