Wilson Gneiss

Fig. 4.11 The Wilson Gneisses and Rennick Schist of the Wilson Group in the southern part of he Daniels Range (Fig. 4.1), USARP Mountains, northern Victoria Land, were intruded by granitic plutons of the Granite Harbor Intrusives. This area exemplifies the complex relationships among the metamorphic gneisses and biotite schists that characterize...

The comparison of the initial Sr/ Sr ratios in Fig. 4.17 supports the conclusion that the feldspar in the till of the Morozumi Range originated primarily from the Granite Harbor Intrusives (GHI) and not from the Rennick Schist (RS) and the Wilson Gneiss (WG) which are exposed in the Daniels Range and in the adjacent Lanterman and Salamander ranges in Fig. 4.14. 

The K-Ar dates of the Wilson Gneisses of the Lanterman Range in Appendix 4.8.3.12 and in Fig. 4.18 indicate that biotite, muscovite, and hornblende reached their blocking temperature for radiogenic Ar... 

Fig. 4.18 Whole-rock Rb-Sr dates of Wilson Gneisses in the Lantennan and Seilamander ranges are 550 20 and 555 36 Ma, respectively. These dates indicate the time of regional metamorphism during which the strontium in these rocks was isoto-picaUy homogenized. The K-Ar dates of biotite, muscovite, and hornblende are cooUng ages (Data from Kreuzer et al. 1981, 1987 Adams 1982 Adams and Hohndorf 1991). See also Appendix 4.8.3.12.

The Salamander Range is located southeast of the Lanterman Range and is separated from the Freyberg Mountains by the upper Canham Glacier. The northern part of the Salamander Range consists of Wilson Gneisses which, in the southernmost part, is overlain by residual outcrops of the Beacon Supergroup and of the Kirkpatrick Basalt. 

S.3.3 Wilson Gneisses, Daniels Range, Various Methods as Indicated ... 

W7,W15 4.9.3.14 Wilson Gneisses, Salamander Range, Rb-Sr RG230, Quaitz-biotite schist Feldspar, Ca-silicate WR 555 36 0.7158 0.0004 7... 

Fig.4.31 The Wilson Gneiss in Thompson Spur of the Daniels sumably originated from a center of migmatization at depth...

Figure 4.31 Wilson Gneiss, Daniels Range Figure 4.32 Turbidites, Robertson Bay Group Figure 4.33 Beacon Sandstone, Morozumi Range...

---