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Miller, Hubert; Loske, Werner; Kramm, Ulrich (1987): Tab. 1: Zircon isotopic data and rock ages from the Antarctic Peninsula. PANGAEA, https://doi.org/10.1594/PANGAEA.755487, Supplement to: Miller, H et al. (1987): Zircon provenance and Gondwana reconstruction: U-Pb data of detrital zircons from Triassic Trinity Peninsula formation metasandstones. Polarforschung, 57(1/2), 59-69, hdl:10013/epic.29583.d001

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Abstract:
Morphological and U-Pb isotope studies on sedimentary zircons reflect the orogenic evolution of their former host rocks. The orogenic history of detrital zircons from the Trinity Peninsula Formation (TPF) defines the former geological surrounding of the sedimentation basin of the TPF. Same few weil rounded, polycyclic zircons of Precambrian age and Cambrian overprint give hints for an old cratonic source rock. Because of their very low frequency compared with euhedral types, the contribution of an cratonic shield area to the bulk of the sedimentary debris is neglectable low. Euhedral zircons of granitoid origin and Carboniferous age indicate a derivation from an area of widespread Carboniferous intrusions. Except for southern South America and unsurveyed regions in the Antarctic Peninsula itself, no region could deliver zircons with a Carboniferous age record. The only acceptable explanation for the origin of these zircons is a position of the Antarctic Peninsula during the sedimentation of the TPF approximately southwest of southern South America.
Coverage:
Median Latitude: -62.958350 * Median Longitude: -59.216650 * South-bound Latitude: -63.316700 * West-bound Longitude: -60.500000 * North-bound Latitude: -62.600000 * East-bound Longitude: -57.933300
Event(s):
Gandara  * Latitude: -63.316700 * Longitude: -57.933300 * Location: Gandara Island, Antarctic Peninsula * Method/Device: Geological sample (GEOS)
Livingston-Hurd  * Latitude: -62.600000 * Longitude: -60.500000 * Location: Livingston + Hurd Island, South Shetland Islands, Western Antarctica * Method/Device: Geological sample (GEOS)
Comment:
s = S-type zircons, c = C-type zirkons, r = reddish colour, b = brownish color, p = pink colour, a = all colours, m = metamict. Used
constants: STEIGER & JÄGER (1977). Common-Pb composition: STACEY & KREAMERS (1975). Euhedral zirkons 400 Ma, xenomorphic zircons 700 and 800 Ma. Composition of Pb-blank: 208/204, 207/204, 206/204: 37.5, 15.5, 17.72
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
Event labelEvent
Sample commentSample commentMiller, Hubert
Size fractionSize fractionMiller, Hubert
MassMassmgMiller, Hubert
Lead-208/Lead-206 ratio208Pb/206PbMiller, HubertMeasured
Lead-207/Lead-206 ratio207Pb/206PbMiller, HubertMeasured
Lead-206/Lead-204 ratio206Pb/204PbMiller, HubertMeasured
UraniumUmg/kgMiller, Hubert
LeadPbmg/kgMiller, Huberttotal
10 Lead-206206PbnmolMiller, Hubertrad
11 Lead-206/Uranium-238 ratio206Pb/238UMiller, HubertCorrected
12 Lead-207/Uranium-235 ratio207Pb/235UMiller, HubertCorrected
13 Lead-207/Lead-206 ratio207Pb/206PbMiller, HubertCorrected
14 Age, datedAge datedkaMiller, HubertAge, 238U/206Pb Uranium-Lead
15 Age, datedAge datedkaMiller, HubertAge, 235U/207Pb Uranium-Lead
16 Age, datedAge datedkaMiller, HubertAge, 206Pb/207Pb Lead-Lead
Size:
390 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Event

Sample comment

Size fraction

Mass [mg]

208Pb/206Pb
(Measured)

207Pb/206Pb
(Measured)

206Pb/204Pb
(Measured)

U [mg/kg]

Pb [mg/kg]
(total)
10 
206Pb [nmol]
(rad)
11 
206Pb/238U
(Corrected)
12 
207Pb/235U
(Corrected)
13 
207Pb/206Pb
(Corrected)
14 
Age dated [ka]
(Age, 238U/206Pb Uranium-Lead)
15 
Age dated [ka]
(Age, 235U/207Pb Uranium-Lead)
16 
Age dated [ka]
(Age, 206Pb/207Pb Lead-Lead)
Livingston-Hurd euhedral zircons250-200 µm0.70.1915140.086993470.722813.40.05200.054820.42410.056107344000359000457000
Livingston-Hurdeuhedral zircons200-160 µm1.60.1268580.0656161657.637221.10.08670.055960.43870.056833351000369000486000
Livingston-Hurdeuhedral zircons160-125m µm2.20.1469760.081618604.891458.30.22440.058850.46710.057560369000389000513000
Livingston-Hurdeuhedral zircons160-125sb µm2.00.1548920.0722271090.847930.50.12010.060110.48840.058922376000404000564000
Livingston-Hurdeuhedral zircons160-125cb µm1.10.1306090.074777999.240928.30.11450.067030.55720.060289418000450000614000
Livingston-Hurdeuhedral zircons160-125cr µm4.50.1189870.0694261700.763741.00.16590.062470.54580.060058412000442000606000
Livingston-Hurdeuhedral zircons160-125sr µm1.20.1419070.075566789.153832.60.12870.057400.45220.057133360000379000497000
Livingston-Hurdeuhedral zircons160-125crb µm1.10.1154720.0681681784.7638.50.15870.065910.54580.060058412000442000606000
Livingston-Hurdeuhedral zircons125-100 µm3.00.1154080.0704342048.056537.80.15410.065440.57190.063386408000459000721000
Livingston-Hurdeuhedral zircons100-80 µm3.10.1247150.0744021226.762040.70.16320.063100.54490.062623395000442000695000
Livingston-Hurdeuhedral zircons80-63 µm3.70.1246010.0738241275.076251.50.02060.064800.55820.062484405000450000691000
Livingston-Hurdeuhedral zircons63-40 µm2.00.1527320.082965692.169147.20.18170.063110.54010.062067395000439000676000
Livingston-Hurdeuhedral zircons<40 µm6.40.1629550.085691601.976951.90.19570.060990.51830.061636382000424000662000
Livingston-Hurdwell rounded zircons160-125 µm0.50.1456690.103549744.944358.90.22490.121631.42210.0847967400008980001311000
Livingston-Hurdwell rounded zircons125-100p µm0.60.1198720.0877131611.966580.20.32380.116711.27030.0789427120008330001171000
Livingston-Hurdwell rounded zircons125-100a µm0.50.1314170.0896321130.051058.80.23540.110611.17570.0770926760007890001124000
Livingston-Hurdwell rounded zircons100-40 µm0.30.1113030.0894602206.259673.20.30140.121211.38890.0831037380008840001272000
Gandara euhedral zircons160-125 µm2.70.0988000.0627926768.440929.00.12100.070840.59250.060659441000473000627000
Gandaraeuhedral zircons125-100 µm2.70.0972080.0663405262.143932.60.13570.074150.65030.063599461000509000728000
Gandaraeuhedral zircons10-80a µm3.30.1028000.0655455037.750035.90.14880.071420.61720.062677445000488000697000
Gandaraeuhedral zircons100-80r µm1.00.0997620.0656153885.947933.40.13930.069750.59530.061899435000474000671000
Gandaraeuhedral zircons80-63 µm1.90.1006570.0650754164.554137.40.15530.068780.58420.061600429000467000660000
Gandaraeuhedral zircons63-40 µm1.10.1099440.0650413829.658139.40.16300.067300.56850.061267420000457000649000
Gandarawell rounded zircons125-100 µm0.80.0959120.0753544338.358866.80.27690.112991.12280.072067690000764000988000
Gandarawell rounded zircons100-80 µm0.60.1093290.0902322540.551871.40.28740.132931.55240.0846988050009520001309000
Gandarawell rounded zircons80-63 µm0.30.1043450.0919743509.959187.50.29760.144891.75800.08799687200010300001382000