Abstract
SHRIMP U‐Pb zircon dating of four supracrustal rocks from the Golden Grove area of the Murchison Province shows the need for reassessment of the accepted stratigraphy of the greenstone sequence in this area. Three samples from the Gabanintha Formation give dates of 2960 ± 6 Ma, 2953 ± 7 Ma and 2945 ± 4 Ma. A sample from the overlying Windaning Formation yielded a date of 2809 ± 5 Ma which correlates with similar dates for the same formation in the Mt Magnet and Meekatharra areas within the province. The results indicate that there is a gap of ∼ 140 million years between the time of deposition of the Windaning and Gabanintha Formations making it inappropriate to assign both of these formations to the same group (Luke Creek Group). The data also constrain the age of the stratabound Cu‐Zn deposits in the Golden Grove area to lie between 2953 ± 7 Ma and 2945 ± 4 Ma.
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