TEXTURAL AND MICROANALYSIS OF IGNEOUS ROCKS: TOOLS ...

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161 TABLE 3.4 PLAGIOCLASE TRACE ELEMENT PARTITION COEFFICIENTS <strong>AND</strong> CALCULATED PARENT LIQUID COMPOSITIONS Sample Zone Pop. An DSr DBa DLa DCe DNd DSm DY Sr Ba La Ce Nd Sm Y (mol%) 4 Site 1203 Unit 3 A C B 80 1.46 0.19 0.1 0.08 0.06 0.03 0.01 268.9 53.4 2.84 9.01 5.94 1.5 15.9 A I B 74 1.61 0.23 0.1 0.09 0.06 0.03 0.01 235.3 44.5 2.79 8.97 4.66 2.48 16.5 A I B 75 1.58 0.22 0.1 0.09 0.06 0.03 0.01 234 44 2.81 8.7 5.27 2.54 16.1 A I B 80 1.45 0.19 0.1 0.08 0.06 0.03 0.01 268.8 52.4 2.93 8.46 5.35 1.32 11.4 A I B 80 1.47 0.19 0.1 0.08 0.06 0.03 0.01 269.2 54 3.19 8.5 4.61 2.33 15 A I B 80 1.46 0.19 0.1 0.08 0.06 0.03 0.01 274.6 55.3 3.16 9.04 5.92 2.4 16.6 A I B 79 1.48 0.2 0.1 0.08 0.06 0.03 0.01 248.5 48.3 2.68 8.34 4.74 2 12.2 A I B 78 1.49 0.2 0.1 0.09 0.06 0.03 0.01 241 47.1 2.81 7.96 4.51 0.73 12.1 B C B 79 1.49 0.2 0.1 0.09 0.06 0.03 0.01 238.8 46.6 2.79 7.42 4.42 2.51 11.8 B I B 80 1.46 0.19 0.1 0.08 0.06 0.03 0.01 248.5 49.4 2.7 8.24 4.83 1.54 13.3 B I B 80 1.47 0.19 0.1 0.08 0.06 0.03 0.01 244.3 48.3 2.69 8.45 5.11 1.57 12.2 continued...
162 TABLE 3.4 Continued Sample Zone Pop. An DSr DBa DLa DCe DNd DSm DY Sr Ba La Ce Nd Sm Y (mol%) B I B 78 1.51 0.21 0.1 0.09 0.06 0.03 0.01 226.7 44.6 2.68 7.84 4.07 1.71 13.7 C C B 81 1.44 0.18 0.1 0.08 0.06 0.04 0.01 254.7 49.5 2.93 8.24 6.26 1.24 13 C C B 80 1.47 0.19 0.1 0.08 0.06 0.03 0.01 247.2 49.8 2.92 8.08 4.43 1.6 11.3 C I B 79 1.47 0.19 0.1 0.08 0.06 0.03 0.01 245.5 48.3 2.91 7.87 4.13 1.53 12 C I B 77 1.52 0.21 0.1 0.09 0.06 0.03 0.01 236.9 45.6 2.87 8.33 4.43 2.2 14.7 C I B 71 1.69 0.26 0.1 0.09 0.05 0.03 0.01 198.3 37.6 2.33 7.25 4.33 1.97 9.9 C I B 78 1.52 0.21 0.1 0.09 0.06 0.03 0.01 245.7 51.7 3.06 7.48 5.86 1.68 12.2 C I B 77 1.54 0.21 0.1 0.09 0.06 0.03 0.01 228.8 45.7 2.52 8.26 4.48 1.43 8.8 C I B 78 1.5 0.2 0.1 0.09 0.06 0.03 0.01 235.5 46 3.21 8.01 4.78 1.81 15.8 C R B 69 1.74 0.28 0.1 0.09 0.05 0.03 0.01 191.9 37.1 2.39 7.85 4.48 1.88 12.6 D-L C B 80 1.47 0.19 0.1 0.08 0.06 0.03 0.01 254.5 51.2 3.04 7.92 5.19 1.25 13.6 D-L I B 79 1.48 0.2 0.1 0.08 0.06 0.03 0.01 250.7 49 2.89 8.86 5.75 1.83 11 D-L I B 78 1.5 0.2 0.1 0.09 0.06 0.03 0.01 243.4 48.5 2.78 8.4 5.16 1.91 14.8 continued...
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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
Page 123 and 124: ulation A crystals are unzoned (An6
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 173: 160 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
Page 223 and 224: 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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