Feyissa et al. (2019) Transition from plume-driven to plate-driven magmatism in the evolution of the Main Ethiopian Rift , Journal of Petrology, 60, 1681-1715, doi:10.1093/petrology/egz043. < 20191025114120-527205 > pub
Table 2-3. Results of K-Ar dating for mafic volcanic rocks from NMER < 20191129105404-301919 > pub
measured unit dbdh-4 K dbdh-4-1 dbdh-4-2 dbag-115 K DBAG-115-1 DBAG-115-2 dbag-74 K dbag-74-1 dbag-74-2 dbag-77 K DBAG-77-1 DBAG-77-2 dbag-72a K dbag-72a 1 dbag-72a 2 tg-51 K tg-51-1 tg-51-2 tg-54 K TG-54-1 TG-54-2 dbag-63 K DBAG-63-1 DBAG-63-2 mm-559B K MM-559B-1 MM-559B-2 DBZ-8_K DBZ-8_Ar1 DBZ-8_Ar2 dh-429 K DH-429-1 DH-429-2 dbz-22 K DBZ-22-1 DBZ-22-2 dbz-30 K DBZ30-a DBZ30-b
latitude N9°8′58.0″ - - N9°34′22.0″ - - N9°58′35.0″ - - N9°58′23.0″ - - N9°56′26.0″ - - N9°2′27.0″ - - N9°7′19.0″ - - N9°45′20.0″ - - N9°1′26.0″ - - N9°50′21.0″ - - N9°33′21.0″ - - N9°52′51.0″ - - N9°57′57.0″ - -
longitude E39°57′14.0″ - - E40°17′13.0″ - - E40°33′59.0″ - - E40°11′36.0″ - - E40°4′24.0″ - - E40°23′32.0″ - - E40°27′26.0″ - - E40°1′51.0″ - - E39°33′13.0″ - - E39°50′51.0″ - - E39°51′40.0″ - - E39°48′55.0″ - - E39°51′54.0″ - -
age Ma - 0.2 (0.02) 0.2 (0.02) - 0.24 (0.03) 0.25 (0.03) - 6.57 (0.35) 6.51 (0.34) - 2.97 (0.16) 2.93 (0.16) - 4.16 (0.22) 4.25 (0.22) - 4.79 (0.3) 5.1 (0.35) - 5.53 (0.29) 5.57 (0.3) - 5.0 (0.26) 5.11 (0.27) - 2.65 (0.14) 2.71 (0.14) - 14.6 (0.8) 14.7 (0.8) - 19.8 (1.0) 19.9 (1.0) - 26.8 (1.4) 26.6 (1.4) - 24.7 (1.3) 24.6 (1.3)
[K] a cg/g 0.704 - - 0.54 - - 0.482 - - 0.432 - - 0.347 - - 0.447 - - 0.606 - - 0.521 - - 0.649 - - 0.893 - - 0.99 - - 0.725 - - 0.958 - -
36Ar b pg/g - 1.338 (0.023) 1.131 (0.019) - 1.887 (0.031) 1.886 (0.031) - 2.105 (0.035) 2.109 (0.034) - 2.535 (0.04) 2.572 (0.04) - 1.447 (0.024) 0.968 (0.018) - 2.996 (0.051) 2.994 (0.05) - 1.624 (0.027) 1.999 (0.034) - 1.537 (0.026) 1.47 (0.024) - 1.669 (0.027) 1.321 (0.023) - 3.935 (0.063) 4.761 (0.075) - 2.72 (0.043) 2.678 (0.043) - 2.863 (0.047) 2.927 (0.047) - 2.367 (0.039) 2.64 (0.042)
40Arrad b ng/g - 0.01 (0.001) 0.009 (0.001) - 0.009 (0.001) 0.009 (0.001) - 0.22 (0.004) 0.218 (0.004) - 0.089 (0.002) 0.088 (0.002) - 0.1 (0.002) 0.102 (0.002) - 0.148 (0.006) 0.158 (0.007) - 0.233 (0.0) 0.234 (0.0) - 0.181 (0.0) 0.184 (0.0) - 0.119 (0.0) 0.122 (0.0) - 0.909 (0.014) 0.915 (0.014) - 1.366 (0.021) 1.373 (0.021) - 1.355 (0.021) 1.35 (0.021) - 1.653 (0.027) 1.642 (0.027)
40Ar/36Ar b - 302.4 (0.6) 303.6 (0.6) - 300.2 (0.4) 300.5 (0.4) - 387.8 (1.4) 386.6 (1.4) - 327.5 (0.4) 326.7 (0.5) - 357.8 (0.7) 386.7 (1.3) - 340.2 (2.0) 343.0 (2.4) - 420.7 (1.7) 398.9 (1.6) - 398.4 (0.9) 405.1 (1.1) - 360.0 (0.8) 375.9 (0.9) - 501.0 (0.5) 467.0 (0.5) - 738.2 (1.3) 747.5 (1.2) - 713.7 (2.8) 701.5 (2.4) - 910.1 (6.5) 844.2 (5.9)
air fraction b % - 97.9 97.5 - 98.6 98.5 - 75.9 76.1 - 90.4 90.6 - 82.7 75.7 - 87.0 86.3 - 69.7 73.7 - 73.7 72.4 - 82.2 78.1 - 58.7 63.1 - 39.6 39.1 - 41.0 41.7 - 32.0 34.6
(a) determined by Flame emission spectrometry on Shimadzu AA6200
(b) determined by isotope dilution mass spectrometry with 38Ar spike on Micromass VG5400
name physical-form quantity unit global-id
dbdh-4 K pub powder 1.2 g 20191111150708-910697
dbdh-4-1 pub 20150224085504-311846
dbdh-4-2 pub 20150224085513-254778
dbag-115 K pub powder 1.0 g 20191111150258-277378
DBAG-115-1 pub aliquot 0.0 g 20150224085700-223374
DBAG-115-2 pub aliquot 0.0 g 20150224085709-181958
dbag-74 K pub powder 0.8 g 20191111150604-634554
dbag-74-1 pub 20150223090839-119756
dbag-74-2 pub 20150223090847-952729
dbag-77 K pub powder 1.2 g 20191111150754-595589
DBAG-77-1 pub aliquot 0.0 g 20150224085716-603771
DBAG-77-2 pub aliquot 0.0 g 20150224085725-070966
dbag-72a K pub powder 1.4 g 20191111150459-549396
dbag-72a 1 pub 20150224085545-626382
dbag-72a 2 pub 20150224085554-093528
tg-51 K pub powder 0.8 g 20191111144211-549678
tg-51-1 pub 20150223090736-070867
tg-51-2 pub 20150223090744-735172
tg-54 K pub powder 1.0 g 20191111145610-498782
TG-54-1 pub aliquot 0.0 g 20150224085341-212804
TG-54-2 pub aliquot 0.0 g 20150224085355-323603
dbag-63 K pub powder 1.2 g 20191111150404-155839
DBAG-63-1 pub aliquot 0.0 g 20150224085511-981625
DBAG-63-2 pub aliquot 0.0 g 20150224085518-913551
mm-559B K pub powder 1.2 g 20191111143548-704529
MM-559B-1 pub aliquot 0.0 g 20150224085540-288920
MM-559B-2 pub aliquot 0.0 g 20150224085550-506138
DBZ-8_K pub powder 20191202113632-437554
DBZ-8_Ar1 pub 20191202113632-949090
DBZ-8_Ar2 pub 20191202113632-473858
dh-429 K pub powder 1.0 g 20191111144340-647861
DH-429-1 pub aliquot 0.0 g 20150224085613-896597
DH-429-2 pub aliquot 0.0 g 20150224085622-209170
dbz-22 K pub powder 0.8 g 20191111143036-961000
DBZ-22-1 pub aliquot 0.0 g 20150223090710-443758
DBZ-22-2 pub aliquot 0.0 g 20150223090719-566338
dbz-30 K pub powder 0.8 g 20191111143652-712363
DBZ30-a pub aliquot 0.0 g 20180220133301-385380
DBZ30-b pub aliquot 0.0 g 20180220133301-891719

The table is created from analysis shown below. The rowname K-Ar dating (Dejene et al., 2017) filters out analysis. Upper analysis has priority.To list more analysis, add a stone in stone sub-tab.

  • name
    technique
    device
    priority
dbdh-4 K dbdh-4-1 dbdh-4-2 dbag-115 K DBAG-115-1 DBAG-115-2 dbag-74 K dbag-74-1 dbag-74-2 dbag-77 K DBAG-77-1 DBAG-77-2 dbag-72a K dbag-72a 1 dbag-72a 2 tg-51 K tg-51-1 tg-51-2 tg-54 K TG-54-1 TG-54-2 dbag-63 K DBAG-63-1 DBAG-63-2 mm-559B K MM-559B-1 MM-559B-2 DBZ-8_K DBZ-8_Ar1 DBZ-8_Ar2 dh-429 K DH-429-1 DH-429-2 dbz-22 K DBZ-22-1 DBZ-22-2 dbz-30 K DBZ30-a DBZ30-b