- place: N6°26′40.6″, E10°18′4.0″ more
- physical-form: powder
- status: unknown
- modified at 2019-07-11
Table 1. CIPW norms and oxygen isotopic composition of Lake Nyos basalts and granite quartz separates < 20190527153537-891268 > in Aka et al. (2008)refreshed at 2020-07-30
1: D20 2: D21 3: D26 4: D27 5: D31 6: BS14 7: BS16 8: MS19A 9: MS19B 10: TS8 11: YF3 12: YF4B
(a) XRF procedures of Takei (2002) on XRF PANalytical PW2400
(b) 100Mg/(Mg+Fe2+)
(c) IRMS with LF on SIRA Thermo-Fisher MAT253
Table 2. Major elements, trace elements and U-Th-Ra data for Lake Nyos and representative Mt.Cameroon lavas < 20190528113204-132006 > in Aka et al. (2008)refreshed at 2020-07-30
1: D20 2: D21 3: D26 4: D27 5: D31 6: BS14 7: BS16 8: MS19A 9: MS19B 10: TS8 11: YF3 12: YF4B 13: 1909-2 14: CA060 15: CA04 16: 1982-1 17: CA076 18: 2000-1
(a) XRF procedures of Takei (2002) on XRF PANalytical PW2400
(b) Q-ICP-MS_procedures of Makishima and Nakamura (1997, 1999, 2006) on Q-ICPMS Agilent 7500cs
(c) Q-ICP-MS_procedures of Lu et al. (2007) on Q-ICPMS Agilent 7500cs
(d) U-Series_procedures of Yokoyama et al. (1999, 2001, 2003) on TIMS Thermo-Fisher MAT262
(e) TIMS with total evaporation on TIMS Thermo-Fisher MAT262
@article{20100310094404048.ttsujimori,
author={{MS19A}},
title={Powder at \nolinkurl{/ISEI/main/127/D/9/Cameroon powder 1/}},
journal={\href{http://dream.misasa.okayama-u.ac.jp/?q=20100310094404048.ttsujimori}{DREAM}},
volume={19},
pages={20100310094404048.ttsujimori},
year={2010},
url={http://dream.misasa.okayama-u.ac.jp/?q=20100310094404048.ttsujimori},
}<?xml version="1.0" encoding="UTF-8"?>
<acquisitions>
<acquisition>
<global_id>20190528104347-794178</global_id>
<name>MS19A</name>
<device>XRF PANalytical PW2400</device>
<technique>XRF procedures of Takei (2002)</technique>
<operator>Aka</operator>
<sample_global_id>20100310094404048.ttsujimori</sample_global_id>
<sample_name>MS19A</sample_name>
<description/>
<place>
<global_id>20190628143252-812262</global_id>
<name>Lake Nyos</name>
<longitude>10.3011111111111</longitude>
<latitude>6.44461111111111</latitude>
<elevation/>
<description>Eastern shore of the lake; pyroclastic surge deposits</description>
</place>
<chemistries>
<analysis>
<nickname>Fe2O3T</nickname>
<value>12.0</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Fe2O3</nickname>
<value>1.43</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>FeO</nickname>
<value>9.51</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>MgO</nickname>
<value>7.14</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfOr</nickname>
<value>10.87</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfAb</nickname>
<value>24.26</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfAn</nickname>
<value>16.97</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfNe</nickname>
<value>6.61</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfDiWo</nickname>
<value>7.77</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfDiEn</nickname>
<value>4.45</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfDiFs</nickname>
<value>2.97</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfOlFo</nickname>
<value>9.34</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfOlFa</nickname>
<value>6.88</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfMt</nickname>
<value>2.07</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfIlm</nickname>
<value>5.43</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>modeOfAp</nickname>
<value>1.83</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
<acquisition>
<global_id>20190528112726-193010</global_id>
<name>MS19A</name>
<device>XRF PANalytical PW2400</device>
<technique>XRF procedures of Takei (2002)</technique>
<operator>Aka</operator>
<sample_global_id>20100310094404048.ttsujimori</sample_global_id>
<sample_name>MS19A</sample_name>
<description/>
<place>
<global_id>20190628143252-812262</global_id>
<name>Lake Nyos</name>
<longitude>10.3011111111111</longitude>
<latitude>6.44461111111111</latitude>
<elevation/>
<description>Eastern shore of the lake; pyroclastic surge deposits</description>
</place>
<chemistries>
<analysis>
<nickname>SiO2</nickname>
<value>47.9</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>TiO2</nickname>
<value>2.86</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Al2O3</nickname>
<value>15.29</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Fe2O3T</nickname>
<value>12.0</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>MnO</nickname>
<value>0.17</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>MgO</nickname>
<value>7.14</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>CaO</nickname>
<value>8.2</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Na2O</nickname>
<value>4.31</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>K2O</nickname>
<value>1.84</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>P2O5</nickname>
<value>0.79</value>
<unit>%</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>LOI</nickname>
<value>-0.05</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>163.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Ni</nickname>
<value>119.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
<acquisition>
<global_id>20190528105900-104986</global_id>
<name>MS19A</name>
<device/>
<technique>100Mg/(Mg+Fe2+)</technique>
<operator>Aka</operator>
<sample_global_id>20100310094404048.ttsujimori</sample_global_id>
<sample_name>MS19A</sample_name>
<description></description>
<place>
<global_id>20190628143252-812262</global_id>
<name>Lake Nyos</name>
<longitude>10.3011111111111</longitude>
<latitude>6.44461111111111</latitude>
<elevation/>
<description>Eastern shore of the lake; pyroclastic surge deposits</description>
</place>
<chemistries>
<analysis>
<nickname>Mg#</nickname>
<value>57.2</value>
<unit></unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
<acquisition>
<global_id>20190528115814-941841</global_id>
<name>MS19A</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>20100310094404048.ttsujimori</sample_global_id>
<sample_name>MS19A</sample_name>
<description/>
<place>
<global_id>20190628143252-812262</global_id>
<name>Lake Nyos</name>
<longitude>10.3011111111111</longitude>
<latitude>6.44461111111111</latitude>
<elevation/>
<description>Eastern shore of the lake; pyroclastic surge deposits</description>
</place>
<chemistries>
<analysis>
<nickname>Li</nickname>
<value>10.77</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Rb</nickname>
<value>56.1</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Sr</nickname>
<value>955.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Y</nickname>
<value>31.38</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Cs</nickname>
<value>0.53</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Ba</nickname>
<value>646.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>La</nickname>
<value>47.7</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Ce</nickname>
<value>98.8</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Pr</nickname>
<value>11.18</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Nd</nickname>
<value>46.26</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Sm</nickname>
<value>8.91</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Eu</nickname>
<value>2.98</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Gd</nickname>
<value>7.93</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Tb</nickname>
<value>1.1</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Dy</nickname>
<value>5.79</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Ho</nickname>
<value>1.06</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Er</nickname>
<value>2.5</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>2.12</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>3.94</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
<acquisition>
<global_id>20190528150406-402154</global_id>
<name>MS19A</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>20100310094404048.ttsujimori</sample_global_id>
<sample_name>MS19A</sample_name>
<description/>
<place>
<global_id>20190628143252-812262</global_id>
<name>Lake Nyos</name>
<longitude>10.3011111111111</longitude>
<latitude>6.44461111111111</latitude>
<elevation/>
<description>Eastern shore of the lake; pyroclastic surge deposits</description>
</place>
<chemistries>
<analysis>
<nickname>Th</nickname>
<value>5.71</value>
<unit>ug/g</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>U</nickname>
<value>1.47</value>
<unit>ug/g</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Th230zTh232</nickname>
<value>0.939</value>
<unit></unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>U238zTh232</nickname>
<value>0.781</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>1.003</value>
<unit></unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
<acquisition>
<global_id>20190528120400-310212</global_id>
<name>MS19A</name>
<device>Q-ICPMS Agilent 7500cs</device>
<technique>Q-ICP-MS_procedures of Lu et al. (2007)</technique>
<operator>Aka</operator>
<sample_global_id>20100310094404048.ttsujimori</sample_global_id>
<sample_name>MS19A</sample_name>
<description/>
<place>
<global_id>20190628143252-812262</global_id>
<name>Lake Nyos</name>
<longitude>10.3011111111111</longitude>
<latitude>6.44461111111111</latitude>
<elevation/>
<description>Eastern shore of the lake; pyroclastic surge deposits</description>
</place>
<chemistries>
<analysis>
<nickname>B</nickname>
<value>2.24</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Zr</nickname>
<value>277.0</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Hf</nickname>
<value>5.61</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Nb</nickname>
<value>56.23</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Ta</nickname>
<value>3.45</value>
<unit>ppm</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
<acquisition>
<global_id>20190528151238-487224</global_id>
<name>MS19A</name>
<device>TIMS Thermo-Fisher MAT262</device>
<technique>TIMS with total evaporation</technique>
<operator>Yokoyama</operator>
<sample_global_id>20100310094404048.ttsujimori</sample_global_id>
<sample_name>MS19A</sample_name>
<description/>
<place>
<global_id>20190628143252-812262</global_id>
<name>Lake Nyos</name>
<longitude>10.3011111111111</longitude>
<latitude>6.44461111111111</latitude>
<elevation/>
<description>Eastern shore of the lake; pyroclastic surge deposits</description>
</place>
<chemistries>
<analysis>
<nickname>Ra226</nickname>
<value>608.0</value>
<unit>fg/g</unit>
<uncertainty/>
<label/>
<info/>
</analysis>
<analysis>
<nickname>Ra226zTh230</nickname>
<value>1.019</value>
<unit></unit>
<uncertainty/>
<label/>
<info/>
</analysis>
</chemistries>
</acquisition>
</acquisitions>
place quantity
ISEI/main/--/--/Cameroon powder 1 about 1 month
2015-11-05 14:00 2015-12-09 14:32
description: