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Magma Mixing Within Migmatitic Source: Kangaroo Island, South Australia
2004-2011 by Roberto Weinberg. All rights reserved. Unlimited
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I would very much appreciate an email stating how this material will be used: Roberto Weinberg, Monash University, Australia. Thanks, RW.
DISCLAIMER. The material on this website has not undergone the scrutiny of Monash University and does not conform to its corporate web design. It is entirely based on a free-spritied, curiosity-driven research effort by the author, and therefore in no way expresses the official position of the University.
|Figure 1a) Separation of grey magma from schollen-rich section.||1b) Magma separating from restite-rich source and dragging and stretching some of it.|
|Figure 1c) Intrusion of pegmatitic dykes into diatexite, the branch that is nearly parallel to the main foliation in migmatite is relatively straight, but the branch that cuts across foliation (bottom of photo) is irregular with tall protrusions parallel to foliation.||Figure 1d) Detail of previous one. Notice a number of leucocratic patches in the grey di atexite, which we suggest may have originated from disrupted sections of the intrusions.|
|Figure 1e) Detail of the contact between the two branches. They have slightly different textures suggesting that they could be two separate intrusions that do not quite merge at the contact. Notice how the horizontal dyke wraps around the solid schollen in the diatexite.||Figure 1f) Detail of the tip of dyke showing how it peters out into the diatexite on the lower left and how it has the same appearance as the two layer parallel lenses above, suggesting that they are linked.|
|Figure 1) On the same outcrop as previous two photographs, a more intensely foliated, lighter grey diatexitic magma intrudes the darker grey resident one.||Figure 1) Mingling between two distinct magmas at Six Mile Lagoon: grey magma rich in small schollen or biotite clots remnants from separation from diatexite, with crenulated complex margins with a lighter porphyritic granite|
|Figure 1) Mingling between two distinct magmas at Six Mile Lagoon: grey magma rich in small schollen or biotite clots remnants from separation from diatexite, with crenulated complex margins with a lighter porphyritic granite.||Figure 1) Detail|
|Figure 1) Disruption of||Figure 1) Detail|
|Figure 1) Stretching and intrusion of diatexite within porphyritic magmatic rock.||Figure 1) Detail of stretching of a diatexite within a hybrid porphyritic magmatic rock.|
|Figure 1c) Similar to Fig. 1a except that the magma-rich part (right) is comprised of two .||Figure 1d) Detail 1c showing lenses of coarse-grained light granites in more homogeneous finer-granite.|
|Figure 1e) Flow bands rich in schlieren from source inside grey granite with lenses of porphyritic granite.||1f) Same.|