The geochemistry of the alkali metals

Heier, K.S.; Adams, J.A.S.

doi:10.1016/s0079-1946(64)80007-0

Cited by 130 publications

(31 citation statements)

References 358 publications

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“…For example, Rb substitutes for K in minerals such as K-feldspars and micas. Owing to lattice constraints and ionic radii, Rb is incorporated more easily in micas (muscovite, biotite, illite) than in K-feldspars (Heier and Adams, 1964;Lange et al, 1966). Thus, K/Rb is lower in micas than in K-feldspars.…”

Section: Use Of K/rb and Ti/nb As Provenance Indicatorsmentioning

confidence: 99%

Origin and paleoclimatic significance of late Quaternary loess in Nebraska: Evidence from stratigraphy, chronology, sedimentology, and geochemistry

Muhs

Bettis

Aleinikoff

et al. 2008

Geological Society of America Bulletin

127

104

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Rachel, "Origin and paleoclimatic signifi cance of late Quaternary loess in Nebraska: Evidence from stratigraphy, chronology, sedimentology, and geochemistry" (2008 The spatial variability of particle size abundances in Peoria Loess shows a northwest-to-southeast fi ning in Nebraska, consistent with maps of previous workers that show a northwest-to-southeast thinning of loess. These observations indicate that paleowinds that deposited the loess were from the west or northwest and that the source or sources of Peoria Loess lay to the west or northwest.New mineralogical and geochemical data indicate that the most important sources of loess were likely Tertiary siltstones of the White River and Arikaree Groups, silt facies of Pliocene eolian sediments, and small contributions from Pierre Shale. It is likely that fi ne-grained silts were transported episodically through the Nebraska Sand Hills from

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Section: Use Of K/rb and Ti/nb As Provenance Indicatorsmentioning

confidence: 99%

Origin and paleoclimatic significance of late Quaternary loess in Nebraska: Evidence from stratigraphy, chronology, sedimentology, and geochemistry

Muhs

Bettis

Aleinikoff

et al. 2008

Geological Society of America Bulletin

127

104

View full text Add to dashboard Cite

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“…Because Rb forms no minerals in which it comprises the principal alkali metal, Rb sites in minerals have hitherto simply been inferred by analogy with K (see, e.g. Heier & Adams, 1964). Although we had no a priori reason to doubt such analogies, we felt it would be worthwhile to make a direct investigation, and interesting new information has in fact 9 1982 The Mineralogical Society emerged.…”

Section: Introductionmentioning

confidence: 99%

X-ray photoelectron diffraction studies of lepidolite

Evans

Raftery

1982

Clay miner.

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A B S T R A C T: X-ray photoelectron diffraction data for three cleavage surfaces from a crystal of a Norwegian lepidolite containing 2.3% Rb and 3% Mn are reported and interpreted. Rubidium is shown to occupy anhydrous interlayer sites equivalent to those of potassium, and to be distributed uniformly throughout the crystals. Cleavage occurs in Mn rich regions in which the manganese(II) is located in octahedral sites essentially equivalent to those of lithium. The octahedral A1 sites can readily be distinguished from the Li,Mn sites and it is concluded that AI occupies predominantly M(2), cis sites while Li and Mn(lI) prefer M(1), trans sites. Photoelectron diffraction data also indicate that 40 + 5% of the AI is tetrahedrally coordinated, compared with a figure of ~34% deduced independently from a surface analysis.

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“…In contrast, a sample of coarse sandstone from several miles north of the meerschaum deposit contained 105 ppm lithium. A sample of altered ande site underlying the Gila Conglomerate about 3 miles (5 km) northwest of the meerschaum deposit contained 6 ppm lithium which is half the average content (12 ppm) reported for andesites by Heier and Adams (1964). These few preliminary data suggest that lithium may have been leached from the country rock and carried out by the same solutions that deposited the palygorskite, and that similar hot-spring systems have leached the andesite underlying the Gila Conglomerate.…”

Section: Hydrothermal Alteration Of the Gila Conglomeratementioning

confidence: 86%

Lithium resources and requirements by the year 2000

1976

Professional Paper

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The geochemistry of the alkali metals

Cited by 130 publications

References 358 publications

Origin and paleoclimatic significance of late Quaternary loess in Nebraska: Evidence from stratigraphy, chronology, sedimentology, and geochemistry

Origin and paleoclimatic significance of late Quaternary loess in Nebraska: Evidence from stratigraphy, chronology, sedimentology, and geochemistry

X-ray photoelectron diffraction studies of lepidolite

Lithium resources and requirements by the year 2000

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