Partition coefficients of rare-earth elements between igneous matrix material and rock-forming mineral phenocrysts—II

Schnetzler, C. C.; Philpotts, J. A.

doi:10.1016/0016-7037(70)90110-9

Cited by 670 publications

(105 citation statements)

References 8 publications

Supporting

Mentioning

101

Contrasting

Order By: Relevance

“…The decrease in the (Pr/Yb) cn ratios of clinopyroxene and garnet (Fig. 12a) the REE concentrations of garnet are generally higher than those of clinopyroxene could be explained by relatively higher partition coefficients of garnet than clinopyroxene (Schnetzler and Philpotts, 1970). The decrease in the net REE concentrations may be mainly due to this partitioning behavior, and due to the enhanced ability of the fluid to transport the REEs by the formation of soluble carbonate complexes.…”

Section: Rees Of Skarn and Ore Calcite As An Indicator To Origins mentioning

confidence: 94%

“…The partitioning behavior of REE between the fluid and clinopyroxene or garnet has not yet been known. The data on the REE partitioning between melt and the minerals (Schnetzler and Philpotts, 1970;McKay et al, 1986) imply that clinopyroxene favors the MREEs-HREEs relative to the LREEs, garnet prefers the HREEs, and garnet has higher partition coefficients than clinopyroxene. Because the partition behavior of each mineral is probably invariable and the REE patterns of limestone do not vary, the REE patterns and features of garnet or clinopyroxene different from those of limestone are most likely derived from the original hydrothermal fluids.…”

Section: Rees Of Skarn and Ore Calcite As An Indicator To Origins mentioning

confidence: 98%

See 1 more Smart Citation

Rare Earth Elements as an Indicator to Origins of Skarn Deposits: Examples of the Kamioka Zn‐Pb and Yoshiwara‐Sannotake Cu(–Fe) Deposits in Japan

Kato

1999

Resource Geology

View full text Add to dashboard Cite

: Systematic data of rare earth elements (REEs) are presented in order to put some constraints on the origin of hydrothermal fluids responsible for two contrastive skarn deposits in Japan; the Kamioka Zn‐Pb and Yoshiwara‐Sannotake Cu(‐Fe) deposits. Carbon and oxygen isotopic studies have demonstrated that the hydrothermal fluids responsible for the Kamioka Zn‐Pb deposits are of meteoric water origin whereas those for the Yoshiwara‐Sannotake Cu(‐Fe) deposits are of magmatic water origin. The REE abundances of epidote skarn derived from aluminous rocks, garnet and clinopyroxene in calcic exoskarn derived from limestone, and interstitial calcite associated with sulfide minerals were determined for these contrastive skarn deposits by inductively‐coupled plasma mass spectrometry (ICP‐MS). A significant difference in the REE concentrations is not found between epidote skarn and aluminous original rock (plagioclase‐clinopyroxene rock, called Inishi rock) from the Kamioka Zn‐Pb deposits, indicating that the REEs are generally immobile during the formation of epidote skarn, and that the REE concentrations of the hydrothermal fluid are considerably low relative to the aluminous original rock. In contrast, the epidote skarn exhibits enrichment of Eu with increasing total REE concentrations relative to the aluminous original rock (quartz diorite) in the Yoshiwara‐Sannotake Cu(‐Fe) deposits, implying a contribution of magmatic fluid derived from granitoids during the skarn formation. Limestone generally has much lower REE concentrations related to surrounding aluminous rocks, and thus the REE concentrations of garnet and clinopyroxene in calcic exoskarn, originated from limestone, are variable due to the interaction with the hydrothermal fluids. The chondrite‐normalized REE patterns of garnet, clinopyroxene, and interstitial calcite exactly provide useful information on origins of hydrothermal fluids. The REE patterns of these minerals from the Kamioka Zn‐Pb deposits show lower (Pr/Yb)cn ratios, and negative Ce and Eu anomalies inherited from limestone with the decrease of This suggests that the hydrothermal fluids responsible for the Kamioka Zn‐Pb deposits were depleted in REEs, and were not magmatic water in origin, but presumably meteoric one. In striking contrast, the REE patterns of exoskarn minerals and calcite from the Yoshiwara‐Sannotake Cu(‐Fe) deposits exhibit a positive Eu anomaly, and high (Pr/Yb)cn ratios with the considerable increase of σREE and the disappearance of negative Ce anomaly, implying that the fluids were dominantly of magmatic origin. The REE indices are very likely to be an excellent indicator to origins of the skarn deposits.

show abstract

Section: Rees Of Skarn and Ore Calcite As An Indicator To Origins mentioning

confidence: 94%

Section: Rees Of Skarn and Ore Calcite As An Indicator To Origins mentioning

confidence: 98%

Rare Earth Elements as an Indicator to Origins of Skarn Deposits: Examples of the Kamioka Zn‐Pb and Yoshiwara‐Sannotake Cu(–Fe) Deposits in Japan

Kato

1999

Resource Geology

View full text Add to dashboard Cite

show abstract

“…Europium enrichment in chemical sedimentary rocks that precipitated from seawater indicates a strong influence of high-temperature hydrothermal fluids on the seawater dissolved REE+Y load (e.g., Klinkhammer et al, 1983;Derry andJacobsen, 1988, 1990;Bau and Dulski, 1996;Viehmann et al, 2015). Positive Eu anomalies in hydrothermal fluids are linked to the breakdown of plagioclase minerals within the volcanic rocks underlying hydrothermal vents, as plagioclase is intrinsically enriched in Eu relative to other REE+Y during igneous crystallisation (Schnetzler and Philpotts, 1970;Graf, 1977Graf, , 1978Fryer et al, 1979). Furthermore, Eu remains in the soluble Eu 2+ state in hydrothermal fluids because Eu 2+ is more stable at higher temperatures (Sverjensky, 1984;Bau, 1991).…”

mentioning

confidence: 99%

Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history

Konhauser

Planavsky

Hardisty

et al. 2017

Earth-Science Reviews

379

257

View full text Add to dashboard Cite

“…Schnetzler and Philpotts [50] stated that the uptake of Eu +2 by plagioclase depends upon the anorthite content (since Eu +2 substitutes for Ca in the plagioclase structure). This would reduce the Eu content of the more sodic plagioclase and consequently the more fractionated rocks.…”

Section: Tectonic Settingmentioning

confidence: 99%

Characterization of a Post Orogenic A-Type Granite, Gabal El Atawi, Central Eastern Desert, Egypt: Geochemical and Radioactive Perspectives

Fawzy¹

2017

OJG

View full text Add to dashboard Cite

The alkali feldspar granite of Gabal El Atawi is post orogenic granite originated from subalkaline magma in extensional suite. It is developed within plate tectonic setting and has A 2 -type character which generated from apparent crustal source. The petrographic, geochemical and radioactive characteristics of El Atawi granite meet and fulfill the requirements of being fertile granite and it can be considered as promising uraniferous granite. Fluid inclusion studies of the altered granite elucidated two different solutions acting on the host granitic pluton. The first is NaCl-CaCl low temperature fluid with a wide range of salinity. The second is high temperature and salinity Fe-Mg-Na chloride solution. Different fractures in the granite acted as good channels for the hydrothermal fluids that leached uranium from its bearing minerals disseminated all over the host granite and redeposited it in the alteration zones.

show abstract

Partition coefficients of rare-earth elements between igneous matrix material and rock-forming mineral phenocrysts—II

Cited by 670 publications

References 8 publications

Rare Earth Elements as an Indicator to Origins of Skarn Deposits: Examples of the Kamioka Zn‐Pb and Yoshiwara‐Sannotake Cu(–Fe) Deposits in Japan

Rare Earth Elements as an Indicator to Origins of Skarn Deposits: Examples of the Kamioka Zn‐Pb and Yoshiwara‐Sannotake Cu(–Fe) Deposits in Japan

Iron formations: A global record of Neoarchaean to Palaeoproterozoic environmental history

Characterization of a Post Orogenic A-Type Granite, Gabal El Atawi, Central Eastern Desert, Egypt: Geochemical and Radioactive Perspectives

Contact Info

Product

Resources

About