Magma Mingling Features: Tynong Pluton, Victoria, Australia
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Magma Mingling Features: Tynong Pluton, Victoria, Australia
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| Copyright
2004-2011 by Roberto Weinberg. All rights reserved. Unlimited
permission to
copy or use is hereby granted for non-profit driven enterprise, subject
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notice and acknowledgment of the source URL: users.monash.edu.au/~weinberg. 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. |
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| a) Mafic sill intruded into a granitic chamber. The lower part of the photo marks the floor of the sill, from where granite net-veins the sill, giving rise to pillows with chilled margin. Horizontal ~20m. | b) Detail of (a). Granite disrupting mafic sill forming round and irregular mafic pillows. Horizontal ~3m. |
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| c) Detail of (b) Mingling features. Note variation from sharp though irregular contact to more diffuse contact (upper part of photo). Note also chilled margin in round enclaves and also irregular, disrupted enclaves varying is size. | d) Same as (c). |
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| e) Thin fingers of granite have diffuse tips against the fine-grained mafic rock. | f) Irregular contacts, with Mingling on the granite (left). |
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| g) Nature of contact. | h) Finger of granite into diorite with diffuse contact. |
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| i) Pegmatitic pod inside diorite. Fluorite in pegmatite(?) and altered diorite. | |
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| j) Quartz occeli surrounded by biotite? | k) Quartz occeli surrounded by biotite?. |