TEXTURAL AND MICROANALYSIS OF IGNEOUS ROCKS: TOOLS ...

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159 TABLE 3.3 Continued Sample Zone Pop. An FeOT P2O5 K2O TiO2 Na2O CaO MgO SiO2 Al2O3 Total Mg# Ti Rb Sr Y Ba La Ce Nd Sm Eu (mol%) Y5L I B 81 0.57 0.17 0.03 0.02 2.03 15.39 0.21 49.10 32.60 100.13 0.22 – – – – – – – – – – Y5L I B 84 0.56 0.18 0.02 0.02 1.71 16.42 0.18 47.69 33.74 100.53 0.2 – – 317 – 6.0 – – – – – Y5L R B 71 0.70 0.13 0.06 0.06 2.92 12.89 0.28 53.49 29.88 100.41 0.24 – – – – – – – – – – Y10 C B 82 0.55 0.16 0.26 0.02 1.65 15.44 0.20 48.81 33.52 100.61 0.22 – – 324 – 6.3 – – – – – Y10 I B 82 0.56 0.16 0.02 0.01 1.94 15.89 0.18 48.22 33.54 100.54 0.2 – – 324 – 6.3 – – – – – Y10 I B 83 0.57 0.18 0.02 0.02 1.77 16.16 0.19 47.84 33.99 100.72 0.2 – – 331 – 6.6 – – – – – Y10 I B 82 0.55 0.19 0.02 0.03 1.86 15.98 0.19 47.97 33.68 100.48 0.21 – – 329 – 6.9 – – – – – Y10 R B 73 0.61 0.17 0.08 0.06 2.73 13.78 0.23 50.35 31.25 99.25 0.23 – – – – – – – – – – Y11 C B 84 0.54 0.18 0.02 0.03 1.74 16.20 0.19 47.74 33.62 100.25 0.21 – – 307 – 5.6 – – – – – Y11 C B 84 0.52 0.18 0.02 0.03 1.65 16.23 0.18 47.54 33.60 99.95 0.21 – – 327 – 6.0 – – – – – Y11 I B 84 0.53 0.20 0.02 0.03 1.67 16.15 0.19 47.23 33.63 99.64 0.21 – – 310 – 6.1 – – – – – Y11 I B 83 0.57 0.19 0.03 0.03 1.80 15.79 0.19 47.74 32.94 99.27 0.2 – – – – – – – – – – continued...
160 TABLE 3.3 Continued Sample Zone Pop. An FeOT P2O5 K2O TiO2 Na2O CaO MgO SiO2 Al2O3 Total Mg# Ti Rb Sr Y Ba La Ce Nd Sm Eu (mol%) Site 884 Unit 8 9R2A C B 86 0.50 – 0.01 – 1.54 17.7 0.2 46.1 34.2 100.25 0.24 153.2 0.07 201 0.16 2.9 0.12 0.27 0.21 0.13 0.17 9R2A R B 82 0.51 – 0.02 – 2 16.9 0.2 48 33.2 100.83 0.23 125.3 0.09 207 0.21 2.8 0.09 0.29 0.23 0.16 0.16 9R3B C B 85 0.52 – 0.01 – 1.61 17.2 0.18 46.2 34.9 100.62 0.21 191.8 0.12 207 0.11 3.5 0.14 0.26 0.14 0.15 0.17 9R3B R B 84 0.53 – 0.01 – 1.8 16.8 0.21 47.2 33.8 100.35 0.24 124.1 0.10 195 0.11 2.5 0.13 0.22 0.20 0.18 0.17 1 Interm. = Intermediate area between core and rim of largest discernible plagioclase crystal in each xenolith 2 Fe reported as total FeO 3 Major elements in wt.% and trace elements in ppm
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TEXTURAL AND MICROANALYSIS OF IGNEO
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TEXTURAL AND MICROANALYSIS OF IGNEO
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DEDICATION This work is dedicated t
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CHAPTER 2: MAGMA EVOLUTION REVEALED
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3.6.3.1 Crystal Population Origins
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FIGURES 1.1 Magma Chambers . . . .
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TABLES 2.1 MAJOR AND TRACE ELEMENT
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thus been debate within the volcano
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Cambrian schist) including a crysta
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explosive eruption vs. mild effusiv
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tiation (e.g., [84, 98]; Fig. 1.3).
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defined as having crystallinities b
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12 Figure 1.4: Large Igneous Provin
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distribution of crystal sizes (e.g.
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investigating magmatic evolution us
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length dispersive spectroscopy(WDS)
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microdrilling, a pre-cleaned square
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1.7.2 Detroit Seamount, Part of the
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lations. Reprocessing of intrusive
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nucleated homogenously and grew thr
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With accurate partition coefficient
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uniform composition of large volume
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Figure 2.2. Hand sample and thin se
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2.3.1 A Cogenetic Relationship Betw
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Figure 2.4. Stratigraphic section o
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Figure 2.5. Backscatter electron im
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studies of Kwaimbaita basalt by San
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42 Crystal Zone An (mol%) TABLE 2.1
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44 Crystal Zone An (mol%) 63R2 phen
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along the xenolith margins (e.g., F
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are more abundant in phenocrysts fr
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54 Crystal Zone 5 ML-X1 xenolith TA
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56 TABLE 2.2 Continued Crystal Zone
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Figure 2.7. Measured major and trac
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2.5.3.2 Trace Elements It is diffic
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Figure 2.9. Trace element ratio plo
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2.5.4 Resorption Features in Site 1
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should, however, be noted that in t
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2.6.1.2 An-rich OJP Plagioclase: In
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equivocally the roles of H2O, press
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ent magma requires significant clin
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tion driven plumes, or stirring by
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Yamashita, [123], and thus did not
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erally extensive crystal-mush netwo
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asalt at Site 1185 of ODP Leg 192 [
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CHAPTER 3 SHALLOW MAGMA EVOLUTION D
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magma compositions [23, 39, 98]. A
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Figure 3.2. Stratigraphy of basalts
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[118]. No volcaniclastic rocks were
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magmatic crystallization. Using the
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Figure 3.3. A cross polarized light
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3.4.5 Major and Trace Element Data
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3.4.6.1 Partition coefficients for
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3.5.1.2 Site 884 CSDs I measured pl
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Figure 3.5. Plagioclase CSDs of ODP
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106 TABLE 3.2 CSD RESULTS Sample OD
Page 121 and 122: ln (n) [mm -4 ] ln (n) [mm -4 ] 10
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Page 125 and 126: Figure 3.8. a) The majority of Site
Page 127 and 128: 3.5.4.3 Site 1203 Unit 31 and Site
Page 129 and 130: 3.5.5 Trace Elements 3.5.5.1 Measur
Page 131 and 132: Unit 31 > Site 884 Unit 8 (Table 3.
Page 133 and 134: 3.6 Discussion 3.6.1 Evidence of Cr
Page 135 and 136: 3.6.1.1 Site 1203 Alkalic Basalts a
Page 137 and 138: etween the different crystal popula
Page 139 and 140: Unit 14 and 31 magmas accumulated o
Page 141 and 142: sition is similar to parent magmas
Page 143 and 144: Sr - low La/Ce population A parent
Page 145 and 146: The Unit 31 plagioclase CSD is kink
Page 147 and 148: was dominated by late stage clinopy
Page 149 and 150: pressure, and growth of An-rich pla
Page 151 and 152: 138 TABLE 3.3 PLAGIOCLASE PHENOCRYS
Page 153 and 154: 140 TABLE 3.3 Continued Sample Zone
Page 171: 158 TABLE 3.3 Continued Sample Zone
Page 187 and 188: KP has been done via drilling at 11
Page 189 and 190: and over time crustal wall-rocks be
Page 191 and 192: flow [33]. I selected a single samp
Page 193 and 194: 4.3.4 Major and Trace Element Data
Page 195 and 196: B) C) parafilm splash guard A) tape
Page 197 and 198: of these elements are the better co
Page 199 and 200: 5 mm 5 mm Figure 4.4. Cross polariz
Page 201 and 202: 4.4.2 Electron Probe Microanalysis
Page 203 and 204: An (mol %) An (mol %) An (mol %) An
Page 205 and 206: study exhibit their highest An at t
Page 207 and 208: 4.4.3 LA-ICP-MS - Trace Elements An
Page 209 and 210: 87 86 Sr/ SrI = 0.705722(8) Ba/Sr =
Page 211 and 212: and Rb (Fig. 4.11d,e). 4.4.3.3 Yttr
Page 213 and 214: Sr (ppm) Y (ppm) La (ppm) Ce (ppm)
Page 215 and 216: Unit 4 plagioclase rims plagioclase
Page 217 and 218: 204 TABLE 4.4 UNIT 4 PLAGIOCLASE PA
Page 219 and 220: 4.5 Discussion 4.5.0.1 Origin of Ma
Page 221 and 222: 4.5.0.2 Insights from Trace Element
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that other factors influenced the a
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C A/B / D A/B C A/B / D A/B Unit 4
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Magma chambers tend to form at hori
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whole-rock basalt data. Cumulate xe
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over short time spans but may be ea
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lowing initial Elan Bank magma empl
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BIBLIOGRAPHY 1. C. Allegre, A. Prov
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22. B. Charlier, J. Davidson, O. Ba
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46. J. Fitton and M. Godard, Origin
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68. M. Higgins, Measurement of crys
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89. J. Longhi, D. Walker and J. Hay
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100 of Geophysical Monograph, pages
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129. J. Tarduno, W. Sliter, L. Kroe
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