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澳大利亚的表生沉积矿化如钒钾铀矿,主要见于西部伊尔加恩地块和加斯科恩成矿省的花岗岩类地体中以及北部部分地区内。最大的矿床是西部的伊利里,其已公布的储量为52,500吨U_3O_8,平均品位为0.15％。矿化产于未稳定的地质地区内,现为半干燥区地体强烈风化的古河道中。该水系除少有的雨季外几乎没有地表水流,它们被崩积物、冲积物和化学沉积物所充填。钙结岩赋存于主要河谷的轴部。它们为近地表伸长的、半连续的板状灰岩和/或白云岩层,一般厚2—15m,宽0.5—4.0 km,长30—150m。钙结岩延至盐湖常常变宽,以进入广阔的泛滥平原和化学三角洲而中止。钒钾铀矿总是在晚期沉积物水平面或正好在其下面。有三个
Precipitation mineralization in Australia, such as vanadium potassium uranium deposits, is found predominantly in the granite landforms of the Ilgana block in the west and in the Gascogne metallogenic province and in parts of the north. The largest deposit is the Erieri in the west, with a reported reserve of 52,500 tonnes U_3O_8 and an average grade of 0.15%. Mineralization occurred in the unstable geological area, now semi-dry area of the strong weathered ancient river. There are very few surface currents except for a few rainy seasons, which are filled with sediment, alluvial and chemical deposits. Calcareous rock occurs in the shaft of the main valley. They are near-surface-elongated, semi-continuous plate-like limestone and / or dolomite formations, typically 2-15 m thick, 0.5-4.0 km wide and 30-150 m long. Calcareous rocks extend to the salt lake, often widening, to enter the vast flood plain and chemical delta and suspension. Vanadium potassium uranium ore is always at or just below the sediment level. There is three