@article{20100614090845653.hkitagawa,
author={{D31}},
title={Hand specimen with quantity 0.26 kg at \nolinkurl{/ISEI/stone storage/Room B/A/A-4/Cameroon 5000/}},
journal={\href{http://dream.misasa.okayama-u.ac.jp/?q=20100614090845653.hkitagawa}{DREAM}},
volume={19},
pages={20100614090845653.hkitagawa},
year={2010},
url={http://dream.misasa.okayama-u.ac.jp/?q=20100614090845653.hkitagawa},
}
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<acquisitions>
<acquisition>
<global_id>20190528105900-579018</global_id>
<name>D31</name>
<device/>
<technique>100Mg/(Mg+Fe2+)</technique>
<operator>Aka</operator>
<sample_global_id>20100614090845653.hkitagawa</sample_global_id>
<sample_name>D31</sample_name>
<description></description>
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<global_id>20190628115302-843181</global_id>
<name>Lake Nyos</name>
<longitude>10.2938055555556</longitude>
<latitude>6.44527777777778</latitude>
<elevation/>
<description> Dam in the northern part; downstream side of the dam</description>
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<analysis>
<nickname>Mg#</nickname>
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<uncertainty/>
<label/>
<info/>
</analysis>
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<acquisition>
<global_id>20190528104345-217513</global_id>
<name>D31</name>
<device>XRF PANalytical PW2400</device>
<technique>XRF procedures of Takei (2002)</technique>
<operator>Aka</operator>
<sample_global_id>20100614090845653.hkitagawa</sample_global_id>
<sample_name>D31</sample_name>
<description/>
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<global_id>20190628115302-843181</global_id>
<name>Lake Nyos</name>
<longitude>10.2938055555556</longitude>
<latitude>6.44527777777778</latitude>
<elevation/>
<description> Dam in the northern part; downstream side of the dam</description>
</place>
<chemistries>
<analysis>
<nickname>Fe2O3T</nickname>
<value>12.2</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Fe2O3</nickname>
<value>1.45</value>
<unit>%</unit>
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<label/>
<info/>
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<analysis>
<nickname>FeO</nickname>
<value>9.67</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
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<analysis>
<nickname>MgO</nickname>
<value>7.77</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
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<nickname>modeOfOr</nickname>
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<uncertainty/>
<label/>
<info/>
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<nickname>modeOfAb</nickname>
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<label/>
<info/>
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<nickname>modeOfAn</nickname>
<value>16.36</value>
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<label/>
<info/>
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<unit>%</unit>
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<label/>
<info/>
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<nickname>modeOfDiWo</nickname>
<value>8.02</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
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<nickname>modeOfDiEn</nickname>
<value>4.66</value>
<unit>%</unit>
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<label/>
<info/>
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<analysis>
<nickname>modeOfDiFs</nickname>
<value>2.98</value>
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<label/>
<info/>
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<nickname>modeOfOlFo</nickname>
<value>10.3</value>
<unit>%</unit>
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<label/>
<info/>
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<nickname>modeOfOlFa</nickname>
<value>7.25</value>
<unit>%</unit>
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<label/>
<info/>
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<nickname>modeOfMt</nickname>
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<unit>%</unit>
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<label/>
<info/>
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<analysis>
<nickname>modeOfIlm</nickname>
<value>5.2</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
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<analysis>
<nickname>modeOfAp</nickname>
<value>1.92</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
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<acquisition>
<global_id>20190528110339-891598</global_id>
<name>D31</name>
<device>SIRA Thermo-Fisher MAT253</device>
<technique>IRMS with LF</technique>
<operator>Aka</operator>
<sample_global_id>20100614090845653.hkitagawa</sample_global_id>
<sample_name>D31</sample_name>
<description/>
<place>
<global_id>20190628115302-843181</global_id>
<name>Lake Nyos</name>
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<elevation/>
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<analysis>
<nickname>d18O</nickname>
<value>5.4</value>
<unit>permil</unit>
<uncertainty/>
<label/>
<info/>
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<acquisition>
<global_id>20190528112725-229102</global_id>
<name>D31</name>
<device>XRF PANalytical PW2400</device>
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<operator>Aka</operator>
<sample_global_id>20100614090845653.hkitagawa</sample_global_id>
<sample_name>D31</sample_name>
<description/>
<place>
<global_id>20190628115302-843181</global_id>
<name>Lake Nyos</name>
<longitude>10.2938055555556</longitude>
<latitude>6.44527777777778</latitude>
<elevation/>
<description> Dam in the northern part; downstream side of the dam</description>
</place>
<chemistries>
<analysis>
<nickname>SiO2</nickname>
<value>47.8</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
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<analysis>
<nickname>TiO2</nickname>
<value>2.74</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Al2O3</nickname>
<value>15.01</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Fe2O3T</nickname>
<value>12.2</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>MnO</nickname>
<value>0.18</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>MgO</nickname>
<value>7.77</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>CaO</nickname>
<value>8.3</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
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<analysis>
<nickname>Na2O</nickname>
<value>4.27</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>K2O</nickname>
<value>1.83</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>P2O5</nickname>
<value>0.83</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>LOI</nickname>
<value>-0.42</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>total</nickname>
<value>100.5</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Cr</nickname>
<value>208.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Ni</nickname>
<value>148.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
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<acquisition>
<global_id>20190528115813-318842</global_id>
<name>D31</name>
<device>Q-ICPMS Agilent 7500cs</device>
<technique>Q-ICP-MS_procedures of Makishima and Nakamura (1997, 1999, 2006)</technique>
<operator>Aka</operator>
<sample_global_id>20100614090845653.hkitagawa</sample_global_id>
<sample_name>D31</sample_name>
<description/>
<place>
<global_id>20190628115302-843181</global_id>
<name>Lake Nyos</name>
<longitude>10.2938055555556</longitude>
<latitude>6.44527777777778</latitude>
<elevation/>
<description> Dam in the northern part; downstream side of the dam</description>
</place>
<chemistries>
<analysis>
<nickname>Li</nickname>
<value>7.83</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Rb</nickname>
<value>43.3</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Sr</nickname>
<value>890.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Y</nickname>
<value>29.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Cs</nickname>
<value>0.42</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Ba</nickname>
<value>593.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
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<analysis>
<nickname>La</nickname>
<value>43.06</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
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<analysis>
<nickname>Ce</nickname>
<value>88.75</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
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<analysis>
<nickname>Pr</nickname>
<value>10.7</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
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<analysis>
<nickname>Nd</nickname>
<value>44.48</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Sm</nickname>
<value>8.86</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Eu</nickname>
<value>2.92</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Gd</nickname>
<value>7.65</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Tb</nickname>
<value>1.11</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Dy</nickname>
<value>5.81</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
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<analysis>
<nickname>Ho</nickname>
<value>1.04</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
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<analysis>
<nickname>Er</nickname>
<value>2.47</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Tm</nickname>
<value>0.33</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Yb</nickname>
<value>2.13</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Lu</nickname>
<value>0.29</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Pb</nickname>
<value>3.49</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
<acquisition>
<global_id>20190528115933-509821</global_id>
<name>D31</name>
<device>Q-ICPMS Agilent 7500cs</device>
<technique>Q-ICP-MS_procedures of Lu et al. (2007)</technique>
<operator>Aka</operator>
<sample_global_id>20100614090845653.hkitagawa</sample_global_id>
<sample_name>D31</sample_name>
<description/>
<place>
<global_id>20190628115302-843181</global_id>
<name>Lake Nyos</name>
<longitude>10.2938055555556</longitude>
<latitude>6.44527777777778</latitude>
<elevation/>
<description> Dam in the northern part; downstream side of the dam</description>
</place>
<chemistries>
<analysis>
<nickname>B</nickname>
<value>2.46</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Zr</nickname>
<value>272.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Hf</nickname>
<value>5.72</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Nb</nickname>
<value>52.9</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Ta</nickname>
<value>3.41</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
<acquisition>
<global_id>20190528150405-551792</global_id>
<name>D31</name>
<device>TIMS Thermo-Fisher MAT262</device>
<technique>U-Series_procedures of Yokoyama et al. (1999, 2001, 2003)</technique>
<operator>Yokoyama</operator>
<sample_global_id>20100614090845653.hkitagawa</sample_global_id>
<sample_name>D31</sample_name>
<description/>
<place>
<global_id>20190628115302-843181</global_id>
<name>Lake Nyos</name>
<longitude>10.2938055555556</longitude>
<latitude>6.44527777777778</latitude>
<elevation/>
<description> Dam in the northern part; downstream side of the dam</description>
</place>
<chemistries>
<analysis>
<nickname>Th</nickname>
<value>4.99</value>
<unit>ug/g</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>U</nickname>
<value>1.32</value>
<unit>ug/g</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Th230zTh232</nickname>
<value>0.961</value>
<unit></unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>U238zTh232</nickname>
<value>0.8</value>
<unit></unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Th230zU238</nickname>
<value>1.202</value>
<unit></unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>U234zU238</nickname>
<value>0.999</value>
<unit></unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
<acquisition>
<global_id>20190528151237-644715</global_id>
<name>D31</name>
<device>TIMS Thermo-Fisher MAT262</device>
<technique>TIMS with total evaporation</technique>
<operator>Yokoyama</operator>
<sample_global_id>20100614090845653.hkitagawa</sample_global_id>
<sample_name>D31</sample_name>
<description/>
<place>
<global_id>20190628115302-843181</global_id>
<name>Lake Nyos</name>
<longitude>10.2938055555556</longitude>
<latitude>6.44527777777778</latitude>
<elevation/>
<description> Dam in the northern part; downstream side of the dam</description>
</place>
<chemistries>
<analysis>
<nickname>Ra226</nickname>
<value>548.0</value>
<unit>fg/g</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Ra226zTh230</nickname>
<value>1.026</value>
<unit></unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
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