Abundances of the fourteen rare-earth elements, scandium, and yttrium in meteoritic and terrestrial matter

Schmitt, R. A.; Smith, R. H.; Lasch, J.E.; Mosen, A.W.; Olehy, D.A.; Vasilevskis, J.

doi:10.1016/0016-7037(63)90014-0

Cited by 207 publications

(54 citation statements)

References 45 publications

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“…On the other hand, the REE pattern of Roberts Victor mine eclogite (SCHMITT et .al., 1963) is accountable in terms of the peak-shaped p.c. function.…”

Section: Alkali Olivine Basaltmentioning

confidence: 99%

Search for chemical effect on partitioning of rare-earth elements in the crystallization process of basaltic systems at 20kb, with some applications.

1977

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Employing two kinds of basalts, i.e., alkali olivine basalt and high-alumina basalt , the partitioning of REE was investigated for partial crystallization at 20kb. Even with the same alkali olivine basalt , the peak-shaped and the terrace-shaped partition coefficient functions were obtained, although both of them belong to a major "rectilinear" partition coefficient group. This difference in the shape appears to be associated with the relative content of Ca to Mg and Fe in crystal phase.Meanwhile, use of a high-Al basalt yielded a new partition coefficient function (schanze-shaped) quite distinct from rectilinear functions and their varieties. Intriguingly, addition of MgO (5%) to the high-Al basalt powder (95%) brought about a drastic change of partition coefficient function , resulting in the terrace-shaped one. It is evinced that the higher values of atomic ratios , Al/(Mg+Fe+Ca) and Si/(Mg+Fe+Ca), in the starting material are favorable to the appearance of schanze-shaped partition coefficient function.Besides, REE in island arc tholeiite from New Britain were accurately determined . REE abundances in this sample have demonstrated to imply that this basalt has a history of temporary separation from melt with 6 8 times chondritic REE abundances through the regulation of the terrace-shaped partition coefficient function. It was also attempted to use the schanze-shaped partition coefficient function in order to explain the genesis of felsic potassic basalt (KAY and GAST , 1973) based on two-stage fractional crystallization model. The REE pattern of the material removed during the second stage was calculated together with the "liquid-type" pattern corresponding to the switching point between two stages in question.

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“…On the other hand, the REE pattern of Roberts Victor mine eclogite (SCHMITT et .al., 1963) is accountable in terms of the peak-shaped p.c. function.…”

Section: Alkali Olivine Basaltmentioning

confidence: 99%

Search for chemical effect on partitioning of rare-earth elements in the crystallization process of basaltic systems at 20kb, with some applications.

1977

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“…Since the concept of 'cut-off grade' involves many factors, and does not apply to existing deposits of the critical elements under consideration, it seems an unlikely useful parameter by which to define slag potential for valuable metal recovery. Thus, to evaluate the chemical-composition variability and to assess the potential contents of Nb, Ta and REE in the slags, the data were normalized relative to the average uppercrust composition (UCC; Taylor, McLennan 1985), to the North American Shale Composite (NASC; Gromet et al 1984) and to average chondrite (Schmidt et al 1963). Fig.…”

Section: Form Of Occurrence Of Critical Elements In Slagmentioning

confidence: 99%

Iron Metallurgy Slags as a Potential Source of Critical Elements - Nb, Ta and REE

Kasina

Michalík

2016

Mineralogia

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Abstract. The recovery of valuable metals from metallurgical slag disposals is a promising option to protect natural resources, limited due to technology development and increased consumption. The Ad-hoc Working Group on Defining Critical Raw Materials within the Raw Materials Supply Group has proposed a list of critical elements which have the greatest economic importance and meet the requirements of sustainable development in Europe. The goal of this study was to examine steelmaking-and blast-furnace slags from metallurgical processes to determine concentrations of elements of the greatest criticality for Poland, e.g. Nb, Ta and REE, and to discuss the viability of their recovery. Slag analyses indicate enrichment of REE relative to UCC, NASC and average chondrite compositions in blast-furnace slags and Nb and Ta in steelmaking slags. To make recovery of these critical elements reasonable and profitable, it is recommended that they be recovered together with other useful raw materials.

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“…The REE concentrations show the characteristic zigzag pattern according to the Oddo-Harkins Rule [10]- [12]. The heavy REE concentrations (Eu-Lu) in most samples are below detection limit.…”

Section: Initial Longmentioning

confidence: 99%

Isotope and REE Characterization of Groundwater Aquifers within the Aquifer Storage and Recovery Programme in Sukhothai (N.-Thailand)

Hengsuwan¹,

Yongprawat²,

Simon³

et al. 2016

JWARP

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Aquifer Storage and Recovery (ASR) was a pilot project for solving flood and drought problem in the northern part of Chao Phraya River basin, Thailand. This part of Thailand always faces flooding in rainy season and drought during dry season every year. The overexploitation of groundwater during dry season leads to continuously decline of water level in this area. In this project, the excessive surface water during rainy season was stored by injection of this treated surface water through recharge wells into the underground aquifers. This would serve to raise the water level, which can be extracted for use during the dry season. To assess the efficiency of the ASR process some tracers are required. The aim of this study is to prove the suitability of natural tracers to follow up the artificial recharge process; emphasis will be placed on Strontium (Sr) isotopic composition. The results showed that the change in 87 Sr/ 86 Sr ratios could be observed during an artificial recharge due to the different isotopic fingerprint of surface water and groundwater. However, the flow direction of the injected water cannot be clearly interpreted because of the limited number of monitoring wells, small distance between each monitoring well and the short duration of injection.

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Abundances of the fourteen rare-earth elements, scandium, and yttrium in meteoritic and terrestrial matter

Cited by 207 publications

References 45 publications

Search for chemical effect on partitioning of rare-earth elements in the crystallization process of basaltic systems at 20kb, with some applications.

Search for chemical effect on partitioning of rare-earth elements in the crystallization process of basaltic systems at 20kb, with some applications.

Iron Metallurgy Slags as a Potential Source of Critical Elements - Nb, Ta and REE

Isotope and REE Characterization of Groundwater Aquifers within the Aquifer Storage and Recovery Programme in Sukhothai (N.-Thailand)

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