scholarly journals Supplemental Material: A robust age model for the Cryogenian Pocatello Formation of southeastern Idaho (northwestern USA) from tandem in situ and isotope dilution U-Pb dating of volcanic tuffs and epiclastic detrital zircons

Author(s):  
V.H. Isakson ◽  
et al. ◽  
M.D. Schmitz

<div>Figure S1. Thin-section photomicrographs for lithologies of the Bannock Volcanic Member and Scout Mountain Member of the Pocatello Formation exposed at Scout Mountain, Idaho. Sample numbers are illustrated on the stratigraphic section of Figure 4. Field of view is 24 mm × 40 mm. Tables S1–S3: LA-ICPMS U-Pb isotope and trace element concentration data. Table S4: CA-IDTIMS U-Pb isotope data.<br></div>

2022 ◽  
Author(s):  
V.H. Isakson ◽  
et al. ◽  
M.D. Schmitz

<div>Figure S1. Thin-section photomicrographs for lithologies of the Bannock Volcanic Member and Scout Mountain Member of the Pocatello Formation exposed at Scout Mountain, Idaho. Sample numbers are illustrated on the stratigraphic section of Figure 4. Field of view is 24 mm × 40 mm. Tables S1–S3: LA-ICPMS U-Pb isotope and trace element concentration data. Table S4: CA-IDTIMS U-Pb isotope data.<br></div>


2009 ◽  
Vol 19 (4) ◽  
pp. 586-595 ◽  
Author(s):  
Jörg Bäurle ◽  
Jan Kučera ◽  
Sabine Frischmuth ◽  
Manfred Lambertz ◽  
Karel Kranda

2007 ◽  
Vol 71 (06) ◽  
pp. 625-640 ◽  
Author(s):  
H. Friis ◽  
T. Balić-Žunić ◽  
C. T. Williams ◽  
R. Garcia-Sanchez

Abstract The crystal structures of nine, and the chemical compositions of ten, natural samples of leucophanite, ideally NaCaBeSi2O6F, were investigated. The analysed samples display a large compositional variation with trace-element abundances &gt;50,000 ppm, primarily due to rare earth elements (REE). Fromthese data, we propose a substitution scheme for the incorporation of REE for Ca, with additional Na substituting for Ca and the generation of vacancies to ensure charge balance. Compositional zonation was observed in some samples; this zonation correlates with variations in cathodoluminescence. The crystal structure of the nine analysed samples could all be refined in space group P212121. We found no evidence for a reduction of symmetry with increased trace-element concentration. Various twin combinations were observed and these seem related to crystallization conditions rather than structural or chemical factors.


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