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Données géochimiques des échantillons de type "CAB" du domaine "Europe" :
| Centre
Paris-Saclay
| | | | | | | webmail : intra-extra| Accès VPN| Accès IST
Univ. Paris-Saclay

Données géochimiques des échantillons de type "CAB" du domaine "Europe" :



Jean-Louis JORON et Michel TREUIL
Laboratoire Pierre Süe
Centre d’Études de Saclay – France
Laboratoire Pierre Sue

Les analyses en éléments traces fournies ci-dessous concernent des roches prélevées par carottage terrestre, dragage ou forage océanique profond. Elles ont toutes été réalisées par la même technique : l’analyse par activation neutronique purement instrumentale(*) et en utilisant les mêmes données standards de calibration. La technique a été développée au Laboratoire Pierre Süe (CE Saclay).
*sans nécessité de mise en solution, source d'imprécisions dans le cas d'analyse de roches, du fait de la présence de minéraux "non solubles".

Référence :

Lexique :

  • CAB : calk-alkaline basalt / Basaltes calco-alcalins
  • CFB (Continental Flood Basalt) ou Trapps,
  • MORB : Middle Oceanic Ridge Basalt / Basaltes des rides médio-océaniques
  • OIB : Ocean Island Basalt / Basaltes des îles océaniques intraplaques
  • Subduction : roches issues de zones de subduction, lieu de destruction de la croûte océanique. Lorsqu’une plaque se heurte à une autre plaque, elle retourne dans le manteau en formant une zone de suduction.
  • Volcanisme d’arc insulaire : les arcs insulaires, répartis en bordure des zones de subduction, résultent de la formation de nouvelle croûte similaire à celle des continents
  • Volcanisme arrière-arc : en arrière d'un arc insulaire, formation de petits bassins dits "arrière-arcs". L’ouverture de ces bassins serait le signe précurseur de la formation d’un bassin océanique.
  • Ophiolite : roches correspondant à la lithosphère océanique, charriée sur un continent par obduction lors de la convergence de deux plaques lithosphériques
  • Magmatisme ancien Magmatisme antérieur à la tectonique des plaques actuelle (antérieur à 500 millions d'années)
    • Archéen : éon précédent le Protérozoïque (de - 4 à - 2.5 milliards d’années).
    • Basalte : roche magmatique rapidement refroidie. C'est le constituant principal de la croûte océanique.
    • Protérozoïque : éon (ou période géochronologique) de la fin du précambrien (de - 2,5 à - 0,541 milliards d’années).
    • Komatiite : roches témoins direct du manteau archéen à olivine et pyroxène.
    • Gabbro : roche magmatique, constituant principal de la couche inférieure de la croûte océanique.
    • Ophite : roche magmatique intermédiaire entre le gabbro et le basalte, qui résulte de la cristallisation d'un magma sans contact avec l'atmosphère .
  • Birimien : âge stratigra^phique équivalent à l'époque paléoprotérozoïque du précambrien (-2.5 à -1.6 Milliards d'années).
  • Les roches de cet âge morceau de croûte terrestre (terrane), essentiellement composé de granites alcalins, agrégé à l'aire continentale sud (craton) de l'Afrique de l'Ouest, âgé de
  • Shale : roche sédimentaire n'ayant pas subi de transformation (métamorphisme) et censée représenter la composition de la croûte continentale primitive.
  • Chondrite et achondrite : météorites avec ou sans "chondres", petites billes composées de silicates, traduisant leur origine primitive ou issue d'astéroïdes.
Echelle des temps géologiques du BRGM.

NB : les références des échantillons suivies de "(d)" indiquent de nouvelles analyses sur des échantillons, précédemment analysés.

TypeDomaineZoneLieuMissionMethode, Age, Eruption, CommentaireFichier localisationÉchantillon / SampleScCrCoNiRbSrZrSbCsBaLaCeNdSmEuTbYbHfTaThUWAsMoBrAu (ppb)Ag (ppb)ZnNa (%)Fe (%)
CABEuropeEspagneCatalogneCat 13(d)25.1022743.8013543.88992470.09300.480063856.0411739.88.532.8700.902.265.5905.4605.1201.160.80.513.832.311.12.818.27
CABEuropeEspagneCatalogneCat 1421.8019543.7014664.611202610.13000.720075155.891138.022.6300.802.215.4905.7806.0701.83.557.68
CABEuropeEspagneCatalogneCat 14(d)21.6016343.0015563.510023080.09900.770084359.16125.741.18.292.7400.832.175.5306.0406.6901.883.025.463.413.737.80
CABEuropeEspagneCatalogneCat 1528.1018054.0016441.38982490.05000.450056940.0481.46.612.5300.822.024.5104.0003.8000.952.898.82
CABEuropeEspagneCatalogneCat 15(d)28.4021153.3017040.18102050.06900.480059342.2589.122.37.722.4100.821.994.6404.0703.9701.011.01.143.021.471.32.958.94
CABEuropeEspagneCatalogneCat 1627.2018152.7017426.88331920.04000.320048434.3877.26.782.5000.851.884.4003.2802.8000.822.488.95
CABEuropeEspagneCatalogneCat 16(d)28.1020552.6017930.27421800.04900.310047435.5678.225.272.4300.862.054.5303.3602.9700.770.90.681.881.670.52.599.27
CABEuropeEspagneCatalogneCat 1728.2019654.6017235.18982150.04000.370050738.3576.67.252.8300.872.014.4303.5703.1100.882.89.30
CABEuropeEspagneCatalogneCat 17(d)28.3018252.1017133.77891620.01800.350049937.7981.525.67.662.7500.851.994.3503.5603.1300.80.792.841.381.02.779.20
CABEuropeEspagneCatalogneCat 1827.4019849.4013837.78582820.06000.400053140.67837.252.9400.902.144.7604.0203.6301.12.778.86
CABEuropeEspagneCatalogneCat 18(d)27.8019348.7014.4368101960.06600.410052240.8389.128.97.952.7300.872.044.7904.0403.7301.010.992.761.142.819.04
CABEuropeEspagneCatalogneCat 1920.2035343.4028168.112733980.13000.770080379.21151.610.23.6401.042.547.6007.2508.5202.63.438.04
CABEuropeEspagneCatalogneCat 19(d)19.9033442.3029169.610943470.11000.760077978.95161.160.610.63.4901.002.457.3807.1008.6302.4411.373.732.830.83.387.94
CABEuropeEspagneCatalogneCat 2023.2025446.6025764.710572960.12000.660074570.42144.85210.13.4900.992.316.4806.6707.5702.081.123.612.031.13.188.17
CABEuropeEspagneCatalogneCat 2124.6026743.602567114493660.13000.790084976.851529.183.4000.972.68.3406.6908.7002.293.427.43
CABEuropeEspagneCatalogneCat 21(d)24.6026242.4026873.110653630.13600.850086879.69155.75710.33.1700.992.538.2606.6208.8502.270.91.184.082.623.237.43
CABEuropeEspagneCatalogneCat 2223.1015445.5015560.611753960.12000.660074772.96147.810.43.7401.082.617.5106.8407.7302.193.239.03
CABEuropeEspagneCatalogneCat 22(d)23.1011543.8015962.511083690.11000.650071471.38150.1113.5301.032.56.8306.7807.7002.071.013.851.581.03.269.04
CABEuropeEspagneCatalogneCat 2327.1017648.9012737.811422170.07000.500060046.9988.162.9100.932.095.1204.3203.9101.112.938.89
CABEuropeEspagneCatalogneCat 23(d)27.8018348.5013639.49251810.06300.450059546.5397.38.393.0100.911.844.8104.3803.9401.081.054.622.451.22.788.99
CABEuropeEspagneCatalogneCat 23(d)27.1018347.2013039.39022210.07200.450060247.7699.847.58.662.7800.902.114.9504.4104.0401.151.50.954.52.452.768.88
CABEuropeEspagneCatalogneCat 2421.5021742.1014442.57042340.07600.450056441.287.624.57.052.3100.792.015.2604.3804.3901.241.11.313.922.392.53.298.06
TypeDomaineZoneLieuMissionMethode, Age, Eruption, CommentaireFichier localisationÉchantillon / SampleScCrCoNiRbSrZrSbCsBaLaCeNdSmEuTbYbHfTaThUWAsMoBrAu (ppb)Ag (ppb)ZnNa (%)Fe (%)
CABEuropeFranceAubracA 1621.506940.904759.310044510.02000.700055967.514459.511.73.4701.182.668.8707.5907.9302.292.82.24.962.831.81372.999.26
CABEuropeFranceAubracA 1726.1023548.5014541.48193370.16000.460041554.91214310.13.1101.022.337.2106.2206.5201.891.222.731.022.11232.689.01
CABEuropeFranceAubracA 1830.2025654.4017564.910733950.19000.810072875.815257.111.43.3301.162.578.2108.14010.5502.611.11.945.23.61253.389.12
CABEuropeFranceAubracA 1930.2025453.7017259.310633630.15000.870072171.814953.911.03.3601.152.548.3608.05010.3902.441.13.164.124.031233.198.94
CABEuropeFranceAubracA 2131.101555.2018166.310673880.16001.110071381.9148.65411.43.4901.182.528.3207.92010.1702.581.01.7432.311242.999.16
CABEuropeFranceBas Languedoc SudG7122.9040550.2022762.111303070.23000.86008028220913.44.21.2007.38.50010.5002.5103.79.080.00
CABEuropeFranceBas Languedoc SudG7321.3027250.4023745.310662750.10000.670071070.81323.621.1506.66.9009.4002.2302.99.120.00
CABEuropeFranceBas Languedoc SudG2Q21.4028550.402404510522760.09000.680071767.412913.13.491.1602.056.86.8009.3002.2203.59.020.00
CABEuropeFranceBas Languedoc SudG7723.7034854.5025639.17811990.09000.440060553.4972.950.9704.64.8007.1001.7602.68.910.00
CABEuropeFranceBas Languedoc SudG7823.6034354.7024937.47411930.08000.400057250.8909.22.690.9301.954.74.6006.7001.6902.88.850.00
CABEuropeFranceBas Languedoc SudG2E23.9033654.2024535.97611920.08000.400057348.6912.640.9305.14.6006.6001.5803.58.90.00
CABEuropeFranceBas Languedoc SudG2C'21.9031245.8023333.26741730.03000.230050339.8707.22.340.8501.924.93.8006.5001.2502.87.570.00
CABEuropeFranceBas Languedoc SudG7421.7021949.3015944.38312260.12000.730065347869.62.710.9001.815.65.0006.4001.7903.28.690.00
CABEuropeFranceBas Languedoc SudG2224.5032654.7025538.39822350.09000.510060449.5952.80.9205.14.7006.9001.7102.68.80.00
CABEuropeFranceBas Languedoc SudGLF2825.4021949.1020259.311173030.14000.710066250.1973.030.9406.56.0006.6001.6103.28.270.00
CABEuropeFranceBas Languedoc SudG2H22.6024444.6014742.914403960.21000.9800993103.718912.94.071.2902.47.99.70016.9004.1203.58.50.00
CABEuropeFranceCantalSP125.5034851.6020828.87182690.07800.35004774691.237.78.232.6200.882.085.7136.2405.7501.560.964.052.51.21001112.968.11
CABEuropeFranceCantalSP229.7030749.7019054.99433660.15500.610062876.6153.56412.33.7601.192.658.2208.0608.9802.431.51.524.533.281192.949.07
CABEuropeFranceCantalSP323.2038350.4025721.56222070.02600.280036532.867.427.56.72.1800.761.744.1335.0103.5900.80.231.180.71082.487.79
CABEuropeFranceCantalSP426.2037248.3020837.38453110.10301.010052955.4109.345.69.12.8600.932.16.7306.8506.6901.81.41.174.572.351.41112.738.15
CABEuropeFranceCantalSP527.6021442.1011951.39183290.09000.890060956114.146.29.592.9901.012.625.8907.7206.9901.720.81.51.281.41132.118.29
CABEuropeFranceCantalSP626.9024849.902097010273880.13900.730075277.4146.768.511.23.3901.052.177.1908.5709.0702.41.41.746.93.71172.418.48
CABEuropeFranceCantalSP723.6034045.70186998983140.16106.030058858.81117.645.69.823.4100.992.057.6107.4007.0102.120.81.65.781.531092.388.09
CABEuropeFranceCantalSP828.4029849.301712359343000.157059.170064266.4513150.610.63.6801.062.227.0907.2807.7102.040.71.365.571.91.21092.549.19
CABEuropeFranceCantalSP928.4022746.1014423928403010.12901.960053759.7122.753.310.43.5001.062.287.2907.5406.4501.811.082.480.31.71022.248.15
CABEuropeFranceCantalSP1024.4032345.3018574.59333140.17000.790061160.6112052.79.643.3600.992.117.6507.4707.7002.111.11.696.64.51.71052.518.19
CABEuropeFranceCantalSP1127.3024042.2010672.313153660.15101.350053657.9117.752.710.03.1701.002.256.2018.0707.3002.011.684.382.11.91162.227.82
CABEuropeFranceCantalSP1232.6057953.3022733.77233180.08500.650039942.291.7409.242.8300.931.945.8607.3504.5801.321.01.091.820.781152.138.32
CABEuropeFranceCantalSP1325.7038150.8026232.56932890.08500.380043841.984.87.962.4800.831.865.6236.5305.3301.580.80.984.582.71.51112.898.01
CABEuropeFranceCantalSP1440.6021059.8013421.35021770.05400.380026324.555.126.76.782.1400.761.632.6604.3002.5800.871.422.151.331.2862.028.61
CABEuropeFranceCantalSP1524.5036051.7023625.46562040.08100.28003863572.630.77.042.5200.801.784.6305.3703.9801.081.50.752.90.611.9351062.438.30
CABEuropeFranceCantalSP1628.9043652.0022947.58643480.13800.68005175812457.410.93.6601.082.068.5008.6206.5601.851.11.254.341.581.51032.528.59
CABEuropeFranceCantalSP1724.706642.805762.67772850.09000.440041747.6100.345.69.553.0100.982.264.8506.4905.3101.430.41.632.390.61.21203.028.94
CABEuropeFranceCantalSP1828.6029650.10185111.9793180.16101.040069271.6137.54610.03.2901.022.347.4707.3309.4202.281.20.983.882.31.2982.768.69
CABEuropeFranceCantalSP1926.9037152.20203498433030.14001.630061763.51128.754.610.33.5601.062.167.0907.4407.8501.991.21.134.7421062.219.15
CABEuropeFranceCantalSP2029.9021644.709850.59233300.14001.440051956.27118.75010.43.4501.052.186.4107.9106.1801.911.553.222.12.21022.057.61
CABEuropeFranceCantalSP2124.2015740.109423.26912800.03200.310035536.1975.236.68.312.9500.951.885.9006.6403.5800.860.312.40.261082.688.26
CABEuropeFranceCantalSP2224.7028147.2018050.48522810.08601.420062157.8111.847.69.042.8600.932.175.5056.4307.6201.891.41.353.62.31132.348.13
CABEuropeFranceCantalSP2321.7018835.409462.15422560.06501.080043938.278.838.37.92.3100.832.053.9005.8306.7801.980.72.452.441.411.31122.593.06
CABEuropeFranceCantalSP2433.204633.203749.76592950.07200.280055849.395.647.68.582.5500.942.454.6896.9807.6301.610.90.653.651042.348.14
CABEuropeFranceCantalSP258.30117.301.892.58134350.64000.610070388.1167.556.110.43.3201.053.3210.6607.83015.9402.951.81.471.61.1923.863.25
CABEuropeFranceCantalSP296.40136.803.4113.5143810.07301.790071866.5134.450.98.492.6200.892.659.5106.73014.2903.731.00.832.720.23853.543.74
CABEuropeFranceCantalSP335.30518.20232032438650.82003.260024474.995.517.12.260.8400.281.7116.2403.74029.4609.341.95.72.680.270.61115.212.53
CABEuropeFranceCantalSP371.7061.700.62254186580.41004.3000711114.316527.23.050.9500.342.3612.4704.44030.97010.43.32.3819.38.91.11015.481.87
CABEuropeFranceCausses septentrionalesG5C20.7014637.9011149.67843180.22000.950050557.21048.62.920.9602.256.96.5007.4002.0403.07.370.00
CABEuropeFranceCausses septentrionalesG4320.2015136.7011647.610193330.19000.890054464.312410.83.371.0302.247.76.8007.7002.1003.07.790.00
CABEuropeFranceCausses septentrionalesG5H23.6052255.90351429152010.09000.710057739.5659.53.091.0401.8554.5005.7001.3302.57.890.00
CABEuropeFranceCausses septentrionalesG5E25.2013243.8010638.29642520.15001.150042848.98911.13.271.0802.316.25.7005.2001.4002.68.90.00
CABEuropeFranceCausses septentrionalesG5D22.3052556.0039233.47811730.18001.760058041.5742.650.9404.43.7006.4001.7502.57.590.00
CABEuropeFranceCausses septentrionalesG5415.4021137.1019273.611073830.19001.290068468.913810.63.321.0602.059.057.6809.6002.9803.47.50.00
CABEuropeFranceCausses septentrionalesG4P28.0042554.9026650.19083440.49001.100073673.11213.060.9005.97.40010.4002.8502.68.290.00
CABEuropeFranceCausses septentrionalesGSB3621.3030051.2023242.510263000.14000.750058848.8912.760.8805.76.6006.6001.6903.18.430.00
CABEuropeFranceCausses septentrionalesGBE3426.2027852.9019266.810773410.12000.810076850.6943.070.9506.96.7007.6001.9803.08.480.00
CABEuropeFranceCausses septentrionalesGSE4523.8020342.8013029.47452350.15000.670032936.1727.32.430.8201.845.33.8004.4001.3302.17.80.00
CABEuropeFranceCausses septentrionalesG5818.7015447.2012255.210793130.11000.820065151.91023.381.0406.46.1006.2801.8402.590.00
CABEuropeFranceCausses septentrionalesG5218.5022740.3021559.49743070.21000.590052558.6117.512.23.621.0802.227.56.5006.6001.8203.07.810.00
CABEuropeFranceCausses septentrionalesG4715.5014131.1010865.412204000.22000.870064073.91433.8612.8002.629.48.2008.5802.3703.17.640.00
CABEuropeFranceChaine des PuysP76-1523.008835.704259.16492820.16000.740066360.22.3800.866.0905.4908.2002.473.138.23
CABEuropeFranceChaine des PuysP76-2325.9013036.9067.1517062530.14000.790054648.72.4300.825.1204.8806.7802.672.755.49
CABEuropeFranceChaine des PuysP76-2625.5012140.104961.56933120.10000.7900578472.3900.846.0005.2106.5001.522.578.60
CABEuropeFranceChaine des PuysP76-3025.4010638.904344.26552960.06000.5200564472.5200.845.5105.0406.0501.548.60
CABEuropeFranceChaine des PuysP76-3123.5016436.506536.67972450.10000.540047542.62.4900.835.0704.3705.2801.452.898.57
CABEuropeFranceChaine des PuysP76-3224.7014539.0074377982470.07000.560047442.72.5400.835.0004.3404.7801.322.818.55
CABEuropeFranceChaine des PuysP76-3424.8016839.706938.37792300.08000.800046840.62.5600.815.2004.2905.1601.222.758.46
CABEuropeFranceChaine des PuysP76-7426.9018443.2079.440.17502580.07000.460052645.42.4800.845.1504.7005.7301.442.728.88
CABEuropeFranceChaine des PuysP76-8123.6011638.004946.713782780.11000.500060951.22.6200.95.7105.2806.7601.713.888.54
CABEuropeFranceChaine des PuysP76-8427.1014043.2011148.57752510.13000.730058554.82.5700.775.2005.2906.9001.62.928.46
CABEuropeFranceChaine des PuysP76-8820.907334.4028.751.87562340.11000.530063754.93.1200.915.9205.5507.1001.743.048.25
CABEuropeFranceChaine des PuysP76-9027.0016641.307440.76612120.09000.390051044.92.3100.815.3104.5005.8001.432.368.33
CABEuropeFranceChaine des PuysP76-9430.9021850.0010038.56911840.01000.590046438.92.4500.784.9204.2904.8201.32.468.88
CABEuropeFranceChaine des PuysP76-9523.0010637.404552.17540.10000.530061850.42.6700.845.3005.4606.9001.783.068.39
CABEuropeFranceChaine des PuysP76-9625.009239.504942.97362670.12000.580055749.22.5300.886.0004.9006.0401.622.728.48
CABEuropeFranceChaine des PuysP76-9824.1016435.4075587463270.01000.970057849.62.7200.876.9005.1808.1502.13.287.09
CABEuropeFranceChaine des PuysP76-11136.9021046.806441.512772890.10000.470052048.63.0800.966.1005.4505.1101.372.669.30
CABEuropeFranceChaine des PuysCP128.2020737.106837.57822280.14000.590048843.22.5000.845.1004.3505.1901.352.758.25
CABEuropeFranceChaine des PuysCP220.4012834.0030517342880.15000.580061953.52.5000.865.8005.4106.8001.698.30
CABEuropeFranceChaine des PuysCP311.907317.703577723510.17000.340079173.71392.9501.027.7006.7409.0402.319.62
CABEuropeFranceChaine des PuysCP414.5010621.4020657903300.18000.640074067.41243.0501.017.5506.9409.2102.389.91
CABEuropeFranceChaine des PuysCP59.907614.904768384220.16000.340093385.41683.2101.078.9007.69011.4903.19.13
CABEuropeFranceChaine des PuysCP66.10606.500.7937354700.18000.6200104290.51783.0501.0210.2008.34013.5003.626.69
CABEuropeFranceChaine des PuysCP74.10553.9021105695210.29000.890010921212363.4901.3411.3009.91016.7004.15.28
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CABEuropeFranceCorrèzeBLO 2622.0028646.6018724.55101970.06701.120028726.9254.932.46.212.0500.751.714.5703.2903.3300.971.661.730.810.41022.727.87
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CABEuropeFranceCorrèze13435.9037353.1044461.17672300.14700.670072048.199.946.17.72.3800.741.55.2604.9675.6991.631.21.753.122.124.381882.317.64
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CABEuropeFranceMont DoreMD 132.5022052.50115347332500.15000.500045040.52.6000.875.3004.6005.2001.42.69.04
CABEuropeFranceMont DoreMD 1(d)32.8021852.7011434.47342610.14000.580045240.6792.5900.875.5004.5805.1801.42.099.25
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CABEuropeFranceMont DoreMD 314.804121.80131066643600.02001.100067568.41272.4500.827.7007.05018.5005.123.415.48
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CABEuropeFranceMont DoreMD 510.303512.2061285564000.01003.080074972.21462.5901.038.9006.31017.2003.613.044.42
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CABEuropeFranceMont DoreMD 75.30266.100.91524884670.23002.130070271.51482.3400.8210.8007.59021.2005.343.242.80
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CABEuropeFranceVelayVE 760223.908744.6076478663080.12000.650057748.62.9401.016.8005.7005.9001.723.139.09
CABEuropeFranceVelayVE 760415.107124.40205411143400.10000.8500680563.6501.186.9005.7006.1001.53.538.11
CABEuropeFranceVelayVE 760514.705527.9096710603930.12000.810076763.53.7001.168.4007.1007.2001.743.48.25
CABEuropeFranceVelayVE 760621.205527.80275511343110.14000.520073058.73.6701.167.2006.4006.6801.642.298.88
CABEuropeFranceVelayVE 760711.403815.700.17711974920.15001.4100873723.8301.238.9007.6008.5002.193.046.99
CABEuropeFranceVelayVE 760811.103718.800.114311654690.12002.5500824723.7901.218.6007.5007.8002.183.687.13
CABEuropeFranceVelayVE 76096.70326.120.17611554830.15000.8500951723.8001.179.0008.3009.2002.24.35.39
CABEuropeFranceVelayVE 76BPX31.8021851.401207.19683560.10000.120059741.93.1201.066.7005.3005.5001.291.999.09
CABEuropeFranceVivaraisVV 774126.0034147.10212529213070.11000.840065756.11143.2400.975.6305.6407.46023.337.76
CABEuropeFranceVivaraisVV 774223.1018746.7012642.48012210.11000.550049139.278.52.6200.855.6104.7104.9201.383.428.46
CABEuropeFranceVivaraisVV 774324.7031152.0027459.18511840.15001.460060549.8952.7200.95.0105.0107.4002.213.187.69
CABEuropeFranceVivaraisVV 774422.6036244.2025270.410053510.15001.200072860.51173.3400.966.4406.9508.1202.423.617.55
CABEuropeFranceVivaraisVV 774523.4017241.3010650.48782900.11000.640059045.692.12.8600.936.0605.5806.6801.723.687.97
CABEuropeFranceVivaraisVV 774723.0019941.8013866.610503330.17000.890079866.21343.7801.076.8906.8709.8002.593.958.04
CABEuropeFranceVivaraisVV 774422.6036244.2025270.410053510.15001.200072860.51173.3400.966.4406.9508.1202.423.617.55
CABEuropeFranceVivaraisVV 774523.4017241.3010650.48782900.11000.640059045.692.12.8600.936.0605.5806.6801.723.687.97
CABEuropeFranceVivaraisVV 774723.0019941.8013866.610503330.17000.890079866.21343.7801.076.8906.8709.8002.593.958.04
TypeDomaineZoneLieuMissionMethode, Age, Eruption, CommentaireFichier localisationÉchantillon / SampleScCrCoNiRbSrZrSbCsBaLaCeNdSmEuTbYbHfTaThUWAsMoBrAu (ppb)Ag (ppb)ZnNa (%)Fe (%)

Jean-Louis JORON et Michel TREUIL
Laboratoire Pierre Süe
Centre d’Études de Saclay – France
Laboratoire Pierre Sue

Lexique :

  • CAB : calk-alkaline basalt / Basaltes calco-alcalins
  • CFB (Continental Flood Basalt) ou Trapps,
  • MORB : Middle Oceanic Ridge Basalt / Basaltes des rides médio-océaniques
  • OIB : Ocean Island Basalt / Basaltes des îles océaniques intraplaques
  • Subduction : roches issues de zones de subduction, lieu de destruction de la croûte océanique. Lorsqu’une plaque se heurte à une autre plaque, elle retourne dans le manteau en formant une zone de suduction.
  • Volcanisme d’arc insulaire : les arcs insulaires, répartis en bordure des zones de subduction, résultent de la formation de nouvelle croûte similaire à celle des continents
  • Volcanisme arrière-arc : en arrière d'un arc insulaire, formation de petits bassins dits "arrière-arcs". L’ouverture de ces bassins serait le signe précurseur de la formation d’un bassin océanique.
  • Ophiolite : roches correspondant à la lithosphère océanique, charriée sur un continent par obduction lors de la convergence de deux plaques lithosphériques
  • Magmatisme ancien Magmatisme antérieur à la tectonique des plaques actuelle (antérieur à 500 millions d'années)
    • Archéen : éon précédent le Protérozoïque (de - 4 à - 2.5 milliards d’années).
    • Basalte : roche magmatique rapidement refroidie. C'est le constituant principal de la croûte océanique.
    • Protérozoïque : éon (ou période géochronologique) de la fin du précambrien (de - 2,5 à - 0,541 milliards d’années).
    • Komatiite : roches témoins direct du manteau archéen à olivine et pyroxène.
    • Gabbro : roche magmatique, constituant principal de la couche inférieure de la croûte océanique.
    • Ophite : roche magmatique intermédiaire entre le gabbro et le basalte, qui résulte de la cristallisation d'un magma sans contact avec l'atmosphère .
  • Birimien : âge stratigra^phique équivalent à l'époque paléoprotérozoïque du précambrien (-2.5 à -1.6 Milliards d'années).
  • Les roches de cet âge morceau de croûte terrestre (terrane), essentiellement composé de granites alcalins, agrégé à l'aire continentale sud (craton) de l'Afrique de l'Ouest, âgé de
  • Shale : roche sédimentaire n'ayant pas subi de transformation (métamorphisme) et censée représenter la composition de la croûte continentale primitive.
  • Chondrite et achondrite : météorites avec ou sans "chondres", petites billes composées de silicates, traduisant leur origine primitive ou issue d'astéroïdes.
Echelle des temps géologiques du BRGM.

NB : les références des échantillons suivies de "(d)" indiquent de nouvelles analyses sur des échantillons, précédemment analysés.

 

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