TEXTURAL AND MICROANALYSIS OF IGNEOUS ROCKS: TOOLS ...

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163 TABLE 3.4 Continued Sample Zone Pop. An DSr DBa DLa DCe DNd DSm DY Sr Ba La Ce Nd Sm Y (mol%) D-L I B 79 1.49 0.2 0.1 0.09 0.06 0.03 0.01 247.4 49.6 3.12 8.61 6.31 1.87 10.3 D-S1 C A 76 1.57 0.22 0.1 0.09 0.06 0.03 0.01 234.1 47.8 2.82 7.97 4.22 3.54 6.8 D-S1 I A 74 1.61 0.23 0.1 0.09 0.06 0.03 0.01 221.2 42.7 3.83 6.83 6.55 4.66 5.1 D-S1 I A 75 1.58 0.23 0.1 0.09 0.06 0.03 0.01 236.2 47.1 2.82 7.37 4 3.91 12.3 D-S1 I A 79 1.49 0.2 0.1 0.09 0.06 0.03 0.01 247.5 48.6 2.64 7.78 6.06 2.49 12.8 D-S1 R A 68 1.75 0.28 0.1 0.09 0.05 0.03 0.01 212 46.8 3.22 10.08 6.61 2.51 8.3 D-S1 R A 66 1.83 0.31 0.1 0.09 0.05 0.03 0.01 198.6 41.3 3.26 7.23 4.51 2.54 15.3 D-S2 C A 78 1.5 0.2 0.1 0.09 0.06 0.03 0.01 241.5 49.3 2.18 8.76 4.66 2.2 16.2 D-S2 I A 73 1.64 0.24 0.1 0.09 0.06 0.03 0.01 222.6 39.8 2.9 7.92 1.59 3.92 4.3 D-S2 I A 78 1.52 0.21 0.1 0.09 0.06 0.03 0.01 248.4 48.8 2.58 8.2 4.09 2.63 11.3 D-S2 I A 79 1.49 0.2 0.1 0.09 0.06 0.03 0.01 244.2 47.8 2.51 9.54 4.99 3.41 9.7 D-S2 R A 62 1.94 0.35 0.11 0.09 0.05 0.03 0.01 199.3 65.2 3.05 9.64 5.44 2.9 13.1 E-1 I A 80 1.46 0.19 0.1 0.08 0.06 0.03 0.01 251.6 49.7 3.23 8.42 5.62 1.12 12.1 continued...
164 TABLE 3.4 Continued Sample Zone Pop. An DSr DBa DLa DCe DNd DSm DY Sr Ba La Ce Nd Sm Y (mol%) E-1 I A 80 1.46 0.19 0.1 0.08 0.06 0.03 0.01 245.7 48.7 2.48 8.06 5.03 1.78 10 E-1 I A 81 1.44 0.19 0.1 0.08 0.06 0.04 0.01 248.6 51.1 2.97 8.46 3.94 1.54 11.6 E-1 I A 80 1.45 0.19 0.1 0.08 0.06 0.03 0.01 262 51.9 2.8 8.51 5.68 1.78 12.5 F C A 80 1.45 0.19 0.1 0.08 0.06 0.03 0.01 246.3 46.3 3.13 8.1 4.92 1.26 10.8 F I A 81 1.44 0.19 0.1 0.08 0.06 0.04 0.01 254.2 47.8 3.51 7.82 4.37 1.51 11.6 F I A 73 1.64 0.25 0.1 0.09 0.06 0.03 0.01 208 39.3 2.97 6.67 5.71 1.54 14.4 F I A 80 1.45 0.19 0.1 0.08 0.06 0.03 0.01 250.3 46.8 3.23 8.03 5.56 2.08 14 F I A 78 1.5 0.2 0.1 0.09 0.06 0.03 0.01 236.3 44.3 2.97 7.73 5.48 2.14 12.8 F I A 79 1.49 0.2 0.1 0.09 0.06 0.03 0.01 245.8 49.1 2.67 8.37 5.48 1.39 15.8 F R A 64 1.89 0.33 0.1 0.09 0.05 0.03 0.01 226.7 79.5 4.09 11.78 6.17 1.93 17.1 H I A 77 1.54 0.21 0.1 0.09 0.06 0.03 0.01 235.5 46.5 2.82 8.14 5.12 2.15 10.3 H I A 78 1.5 0.2 0.1 0.09 0.06 0.03 0.01 240.4 46.2 2.79 8.6 4.91 1.71 18.7 H I A 81 1.44 0.19 0.1 0.08 0.06 0.04 0.01 256.2 53.2 2.53 7.78 4.58 2.14 13.2 continued...
Page 1 and 2:
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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Page 61 and 62:
Page 63 and 64:
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
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 175: 162 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
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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
Page 247 and 248:
129. J. Tarduno, W. Sliter, L. Kroe
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