The Cambrian Kalkarindji Large Igneous Province: Extent and characteristics based on new Ar-40/Ar-39 and geochemical data
Lena Z Evins, Fred Jourdan, David Phillips
LITHOS | ELSEVIER | Published : 2009
The Early Cambrian Kalkarindji Continental Flood Basalt Province in northern Australia is an important Large Igneous Province (LIP) both in size and timing. Being the earliest Phanerozoic LIP it may have had a severe effect on the Early Cambrian biota. Here, we investigate the extent of this province by testing the hypothesis that the extensive Table Hill Volcanics in south-central Australia are a southern extension of the Kalkarindji province. The Table Hill Volcanics have long been considered coeval with the Antrim Plateau Volcanics and related volcanics in the Kalkarindji province; however precise age data is lacking. Here, we present new 40Ar/39Ar geochronological, and major and trace el..View full abstract
This research was supported by a Marie Curie International Fellowship within the 6th European Community Framework Programme (LZE). The Geological Survey of Western Australia (GSWA) kindly allowed access and sampling approval for the Empress 1 and 1A drill cores. Linda Glass (now at the Northern Territory Geological Survey) who originally sampled the Empress I drill core, kindly provided those samples and assisted in getting the sampling approval for these samples transferred to LZE. M. Stevens (GSWA) assisted in sampling the Empress 1A drill core. S. Szczepanski is thanked for technical assistance with acquisition of <SUP>40</SUP>Ar/<SUP>39</SUP>Ar data in the Noble Gas Geochronology and Geochemistry Laboratory. the University of Melbourne. Constructive reviews by R. Ernst and A. Saunders improved an earlier version of the manuscript.