TEXTURAL AND MICROANALYSIS OF IGNEOUS ROCKS: TOOLS ...

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171 TABLE 3.4 Continued Sample Zone Pop. An DSr DBa DLa DCe DNd DSm DY Sr Ba La Ce Nd Sm Y (mol%) E R B 72 1.67 0.25 0.13 0.11 0.07 0.04 0.01 207.1 25.8 1.56 4.54 3.31 1.3 7.2 G C B 80 1.45 0.19 0.13 0.11 0.07 0.05 0.01 242.2 34.7 1.9 4.57 3.42 0.85 10.4 G I B 85 1.34 0.16 0.13 0.11 0.07 0.05 0.01 246.3 42.2 1.7 4.71 3.17 1.32 8.8 I C B 83 1.4 0.17 0.13 0.11 0.07 0.05 0.01 234.3 37.8 1.93 4.56 3.41 0.62 11.7 I I B 83 1.38 0.17 0.13 0.11 0.07 0.05 0.01 230.2 37.1 1.76 4.58 3.67 1.4 10.2 J C B 84 1.35 0.16 0.13 0.11 0.07 0.05 0.01 260.7 36.9 2.01 4.6 3.87 0.82 12.3 SPL6 R A 70 1.71 0.27 0.13 0.11 0.07 0.04 0.01 197.5 36.4 2.39 4.88 2.5 1.03 18.3 SPL6 I B 83 1.37 0.17 – – – – – 245.9 38.9 – – – – – SPL6 I B 84 1.46 0.19 – – – – – 235.4 39.6 – – – – – SPL6 I B 81 1.38 0.17 – – – – – 237.6 39.8 – – – – – SPL6 I B 84 1.35 0.16 – – – – – 252.9 45.6 – – – – – SPL6 R B 71 1.44 0.19 – – – – – – – – – – – – Y10 C B 82 1.36 0.16 – – – – – 232.7 36.5 – – – – – continued...
172 TABLE 3.4 Continued Sample Zone Pop. An DSr DBa DLa DCe DNd DSm DY Sr Ba La Ce Nd Sm Y (mol%) Y10 I B 83 1.4 0.17 – – – – – 231.5 36.3 – – – – – Y10 I B 82 1.42 0.18 – – – – – 229 35.5 – – – – – Y10 R B 73 1.38 0.17 – – – – – 240.4 39.2 – – – – – Y11 C B 84 1.40 0.17 – – – – – 235.2 39.7 – – – – – Y11 I B 84 1.37 0.17 – – – – – 223.9 33.7 – – – – – Y11 I B 83 1.35 0.16 – – – – – 241.5 36.8 – – – – – Y11 I B 83 1.36 0.16 – – – – – 228.1 37 – – – – – 4 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
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ln (n) [mm -4 ] ln (n) [mm -4 ] 10
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ulation A crystals are unzoned (An6
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Figure 3.8. a) The majority of Site
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3.5.4.3 Site 1203 Unit 31 and Site
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3.5.5 Trace Elements 3.5.5.1 Measur
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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 183: 170 TABLE 3.4 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
Page 223 and 224: that other factors influenced the a
Page 225 and 226: C A/B / D A/B C A/B / D A/B Unit 4
Page 227 and 228: Magma chambers tend to form at hori
Page 229 and 230: whole-rock basalt data. Cumulate xe
Page 231 and 232: over short time spans but may be ea
Page 233 and 234: 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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