The granite-hosted Tangziwa SnCu deposit in the Gejiu district shows variable alteration of granite with associated mineralization. In this paper, we used whole rock chemistry mass balance calculations and Sr, Nd, Pb, Li, B isotope data to constrain source metals fluids different stages. δ7Li δ11B values unaltered weakly altered (Type I) samples fall narrow ranges −0.70 3.61‰ −14.87 −12.82 ‰, r...

ion and re-representation. COMPARING ANALOGIES AND MODELS The terms model and analog are often used interchangeably by both scientists and educators (Hesse, 1966, 2000; Duit, 1991). Comparing analogs and models based on the preceding review of the characteristics of each suggests that this interchangeability is valid when analogies are based on relational characteristics. The term "representati...

A thin glacial diamicton, informally termed Granite drift, occupies the floor of central Beacon Valley in southern Victoria Land, Antarctica. This drift is ,1.0 m thick and rests with sharp planar contacts on stagnant glacier ice reportedly of Miocene age, older than 8.1 Ma. The age of the ice is based on 40Ar/39Ar analyses of presumed in situ ash-fall deposits that occur within Granite drift. ...

The central pluton within the Neoproterozoic Katharina Ring Complex (area of Gebel Mussa, traditionally believed to be the biblical Mt. Sinai) shows a vertical compositional zoning: syenogranite makes up the bulk of the pluton and grades upwards to alkalifeldspar granites. The latters form two horizontal subzones, an albite–alkali feldspar (Ab–Afs) granite and an uppermost perthite granite. The...

decompression to achieve the same result appear to require extreme The Manaslu granite is the most studied of the dozen or so plutons conditions not permitted by available geological constraints. that make up the High Himalayan leucogranite belt. The inferred relationship of the Manaslu granite with important Himalayan tectonic structures has inspired repeated attempts to determine its crystall...