1976
DOI: 10.1016/0012-821x(76)90037-6
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The Cascade Mountains revisited: A re-evaluation in light of new lead isotopic data

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Cited by 90 publications
(43 citation statements)
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“…Corner flow in the mantle wedge then downdrags the hanging-wall assemblages which subsequently begin to melt as the amphibole solidus is exceeded. Alkali elements are fractionated in slab fluids (Tatsumi et al 1986), such that high Cs/Rb (and correspondingly low K/Rb) ratios in mafic tholeiitic compositions of the Pimainus Formation where Cs/Rb ranges from Figure 7; additionally, Juan de Fuca ridge (Church and Tatsumoto 1975) and continental-derived sediments from the northeast Pacific basin (Church 1976). NHRL is the Northern Hemisphere Reference Line of Hart (1984).…”
Section: Slab Dehydration and Lithospheric Heterogeneitymentioning
confidence: 99%
“…Corner flow in the mantle wedge then downdrags the hanging-wall assemblages which subsequently begin to melt as the amphibole solidus is exceeded. Alkali elements are fractionated in slab fluids (Tatsumi et al 1986), such that high Cs/Rb (and correspondingly low K/Rb) ratios in mafic tholeiitic compositions of the Pimainus Formation where Cs/Rb ranges from Figure 7; additionally, Juan de Fuca ridge (Church and Tatsumoto 1975) and continental-derived sediments from the northeast Pacific basin (Church 1976). NHRL is the Northern Hemisphere Reference Line of Hart (1984).…”
Section: Slab Dehydration and Lithospheric Heterogeneitymentioning
confidence: 99%
“…The lead-isotope composition of Pacific Ocean sediments (Church 1976) supports their being the crustal component in the Tertiary intrusions (Fig. 3).…”
Section: Origin Of the C A~a C E Intrusionsmentioning
confidence: 85%
“…29 -30) NOTES: Original ages have been corrected to modem constants of Steiger and Jager (1977); other K-Ar ages for Tertiary intrusions on Vancouver Island are given in Carson (1973); sample symbols are used in Figs Table 2) and initial (open squares: Table 4) whole-rock leadisotope compositions for the Tertiary intrusions, Vancouver Island, British Columbia. Also shown are present-day generalized fields for MORB'S (Church and Tatsumoto 1975;Brevart et al 1981;Vidal and Clauer 1981), ocean islands (Sun and Jahn 1975;Tatsumoto 1978;Sun 1980;Weis 1983), island arcs (Oversby and Ewart 1972;Church 1976;Meijer 1976;Kay et al 1978), and Pacific sediments (Church 1976;Vidal and Clauer 1981;Sun 1980). The growth curve for reference (S & K) is that of Stacey and Kramers (1975).…”
Section: Introductionmentioning
confidence: 97%
“…8b shows a correlation (correlation coefficient r = end member would not significantly change the isotope ratio. Comparison of Karmutsen Formation whole-rock (triangles) and galena (squares) initial ratios at 220 Ma with 207Pb/2"Pb and 206Pb/204Pb fields adjusted to 220 Ma (using the Stacey and Kramers (1975) growth curve, "S & K") of ocean-island basalts (Sun and Jahn 1975;Sun 1980;Tatsumoto 1978;Weis 1983); island arcs (Oversby and Ewart 1972;Meijer 1976;Kay et al 1978;Church 1976); MORB'S (Church and Tatsumoto 1975;Bdvart et al 1981;Vidal and Clauer 1981); and Pacific sediments (Church 1976;Sun 1980;Vidal and Clauer 1981). Stacey and Krarners (1975) growth curve, "S & K") and Karmutsen Formation initial ratios at 220 Ma (triangles: Table 3) and galena (squares: Table 2).…”
Section: Evidence For Isotopic Mixingmentioning
confidence: 99%