Tab. 1: Zircon isotopic data and rock ages from the Antarctic Peninsula, supplement to: Miller, Hubert; Loske, Werner; Kramm, Ulrich (1987): Zircon provenance and Gondwana reconstruction: U-Pb data of detrital zircons from Triassic Trinity Peninsula formation metasandstones. Polarforschung, 57(1/2), 59-69

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...

Full description

Bibliographic Details
Main Authors: Miller, Hubert, Loske, Werner, Kramm, Ulrich
Format: Dataset
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 1987
Subjects:
Event label
Sample comment
Size fraction
Mass
Lead-208/Lead-206 ratio
Lead-207/Lead-206 ratio
Lead-206/Lead-204 ratio
Uranium
Lead
Lead-206
Lead-206/Uranium-238 ratio
Lead-207/Uranium-235 ratio
Age, dated
Geological sample
Measured
Corrected
Age, 238U/206Pb Uranium-Lead
Age, 235U/207Pb Uranium-Lead
Age, 206Pb/207Pb Lead-Lead
Antarctic
Antarctic Peninsula
The Antarctic
Trinity Peninsula
Antarc*
Online Access:https://dx.doi.org/10.1594/pangaea.755487
https://doi.pangaea.de/10.1594/PANGAEA.755487
Description
Summary: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. : s = S-type zircons, c = C-type zirkons, r = reddish colour, b = brownish color, p = pink colour, a = all colours, m = metamict. Usedconstants: 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

Similar Items