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Buggisch, Werner; Kleinschmidt, Georg; Höhndorf, Axel; Pohl, Jean (1994): Tab. 1: Rb-Sr data on metasediments in the Shackleton Range. PANGAEA, https://doi.org/10.1594/PANGAEA.763436, Supplement to: Buggisch, W et al. (1994): Stratigraphy and facies of sediments and low-grade metasediments in the Shackleton Range, Antarctica. Polarforschung, 63(1), 9-32, hdl:10013/epic.29713.d001

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Abstract:
Summary: The stratigraphy of the Shackleton Range established by Stephenson (1966) and Clarkson (1972) was revised by results of the German Expedition GEISHA 1987/88. The "Turnpike Bluff Group" does not form a stratigraphic unit. The stratigraphic correlation of its formations is still a matter of discussion. The following four formations are presumed to belong to different units: The Stephenson Bastion Formation and Wyeth Heights Formation are probably of Late Precambrian age. The Late Precambrian Watts Needle Formation, which lies unconformably on the Read Group, is an independant unit which has to be separated from the "Turnpike Bluff Group". The Mount Wegener Formation has been thrusted over the Watts Needle Formation. Early Cambrian fossils (Oldhamia sp., Epiphyton sp., Botomaella (?) sp. and echinoderms) were found in the Mt. Wegener Formation in the Read Mountains.
The Middle Cambrian trilobite shales on Mount Provender, which form the Haskard Highlands Formation, are possibly in faulted contact with the basement complex (Pioneers and Stratton Groups). They are overlain by the Blaiklock Glacier Group, for which an Ordovician age is indicated by trilobite tracks and trails, low inclination of the paleomagnetic field and the similarity to the basal units of the Table Mountain Quartzite in South Africa.
The Watts Needle Formation represents epicontinental shelf sediments, the Mount Wegener Formation was deposited in a (continental) back-arc environment, and the Blaiklock Glacier Group is a typical molasse sediment of the Ross Orogen.
Coverage:
Median Latitude: -80.755547 * Median Longitude: -25.596679 * South-bound Latitude: -80.800000 * West-bound Longitude: -29.550000 * North-bound Latitude: -80.733000 * East-bound Longitude: -23.506000
Minimum Elevation: 0.0 m * Maximum Elevation: 0.0 m
Event(s):
Shackleton_Range * Latitude: -80.500000 * Longitude: -22.000000 * Elevation Start: 0.0 m * Elevation End: 0.0 m * Location: Shackleton Range, Antarctica * Method/Device: Geological sample (GEOS)
Comment:
NBS 987 = 0.71023 ± 0.00007, analytical error at the 95% confidence level is ± 2% for 87Rb/86Sr and ± 0.06% for 87Sr/86Sr. Quoted errors are at the level of 95% confidence. Decay constants as in Steiger & Jäger (1977). *normalized to 86Sr/88Sr=0.1194; samples 88-155, 88-108 omitted for regression calculation.
Size:
374 data points

Data

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


Area

Comment

Latitude

Longitude

Sample label

Size fraction

Rb [mg/kg]

Sr [mg/kg]

87Rb/86Sr
10 
87Sr/86Sr
11 
Age dated [ka]
12 
Age dated std dev [±]
13 
Comm
Stephenson Bastion - Clayton Ramparts-80.767-27.200222158.027.617.030.99738
Stephenson Bastion - Clayton Ramparts-80.767-27.200223125.030.012.280.94843
Stephenson Bastion - Clayton Ramparts-80.767-27.20022437.916.46.760.84129
Stephenson Bastion - Clayton Ramparts-80.767-27.20022536.913.08.320.85872
Stephenson Bastion - Clayton Ramparts-80.767-27.200236112.037.08.990.88238
Stephenson Bastion - Clayton Ramparts-80.767-27.20023894.138.37.240.86553
Stephenson Bastion - Clayton Ramparts-80.767-27.2002340.6-2205.070.38.420.86875
Stephenson Bastion - Clayton Ramparts-80.767-27.2002350.6-2292.055.115.510.98198
Stephenson Bastion - Clayton Ramparts-80.767-27.2002-6287.052.915.880.99891
Stephenson Bastion - Ram Bow Bluff-80.800-26.70022683.013.818.011.04589
Stephenson Bastion - Ram Bow Bluff-80.800-26.70022782.413.218.731.064361251000240000.7224 ± 32
Stephenson Bastion - Ram Bow Bluff-80.800-26.700229107.030.410.410.90925MSWD = 2.1
Stephenson Bastion - Ram Bow Bluff-80.800-26.700233124.029.512.470.94230
Stephenson Bastion - Ram Bow Bluff-80.800-26.700243120.038.59.180.88467
Stephenson Bastion - Ram Bow Bluff-80.800-26.70024571.039.55.260.81743
Stephenson Bastion - Ram Bow Bluff-80.800-26.7002260.6-2181.011.648.251.53200
Stephenson Bastion - Ram Bow Bluff-80.800-26.7002-6113.013.424.901.15249
Stephenson Bastion - Ram Bow Bluff-80.800-26.7002420.6-2223.085.67.500.85108
Stephenson Bastion - Ram Bow Bluff-80.800-26.7002-6218.083.57.550.85445
Stephenson Bastion - Ram Bow Bluff-80.800-26.7002440.6-2193.022.625.451.17201
Stephenson Bastion - Ram Bow Bluff-80.800-26.7002-696.920.214.000.98231
Wyeth Heights Formation-80.750-29.55088-168218.028.123.431.1272911500000.728
Wyeth Heights Formation-80.750-29.55088-169228.029.323.381.09935
Wyeth Heights Formation-80.750-29.55088-172174.035.114.700.97002
Wyeth Heights Formation-80.750-29.55088-173186.041.013.370.9017310130000.708
Wyeth Heights Formation-80.750-29.55088-178127.014.027.261.10295
Watts Needle Formationsandstone member-80.733-24.98388-1175.0133.03.840.78547
Watts Needle Formationsandstone member-80.733-24.98388-32173.076.06.660.78898680000570000.726 ± 8
Watts Needle Formationsandstone member-80.733-24.98388-33194.012.248.121.18408MSWD = 16
Watts Needle Formationsandstone member-80.733-24.98388-50113.030.810.700.82791
Watts Needle Formationsandstone member-80.733-24.98388-51253.052.014.290.86685
Watts Needle Formationsandstone member-80.733-24.98388-5793.027.210.020.82919
Watts Needle Formation (Mount Wegener)shale member-80.733-23.50688-76173.034.714.610.82786
Watts Needle Formation (Mount Wegener)shale member-80.733-23.50688-86218.060.710.510.79745584000410000.708 ± 6
Watts Needle Formation (Mount Wegener)shale member-80.733-23.50688-87220.046.613.800.82322MSWD = 5.4
Watts Needle Formation (Mount Wegener)shale member-80.733-23.50688-88216.099.16.340.76056
Watts Needle Formation (Mount Wegener)shale member-80.733-23.50688-146208.058.210.440.79812
Watts Needle Formation (Mount Wegener)shale member-80.733-23.50688-147217.058.610.800.79617
Mount Wegener Formationlow-grade-80.733-23.51688-132216.046.113.730.82022
Mount Wegener Formationlow-grade-80.733-23.51688-133212.0160.03.850.7473653500090000.7139 ± 5
Mount Wegener Formationlow-grade-80.733-23.51688-136205.069.58.610.78008MSWD = 1.8
Mount Wegener Formationlow-grade-80.733-23.51688-143217.065.89.640.78604
Mount Wegener Formationlow-grade-80.733-23.51688-145156.0431.01.050.72188
Mount Wegener Formationlow-grade-80.733-23.51688-152200.071.08.200.77687
Mount Wegener Formationlow-grade-80.733-23.51688-155195.020.328.160.78909
Mount Wegener Formationlow-grade-80.733-23.51688-156229.056.711.790.80247
Mount Wegener Formationvery low-grade-80.733-23.51688-108211.046.413.280.81018
Mount Wegener Formationvery low-grade-80.733-23.51688-109177.0113.04.560.74844561000180000.7113 ± 17
Mount Wegener Formationvery low-grade-80.733-23.51688-111160.072.06.480.76335MSWD = 2.2
Mount Wegener Formationvery low-grade-80.733-23.51688-117193.059.69.470.78705
Mount Wegener Formationvery low-grade-80.733-23.51688-118156.0116.03.920.74223
Mount Wegener Formationvery low-grade-80.733-23.51688-120207.048.612.440.81210
Mount Wegener Formationvery low-grade-80.733-23.51688-125188.050.510.870.79660