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16:55
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Originally posted by prawn_man
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Yes Zipster, quite a few questions remain. I thought that the deep-down hydrothermal stream was bringing the metals in solution. (Geology books sometimes describe these hydrothermal streams as being like hot toothpaste - slowly carrying metals which can dissolve in the strange chemistry provided by pressure, heat, water, no oxygen and reduced redox potential.) This solution travels horizintally then hits the wall and carries the metals upwards where they are deposited mainly at the PY3 and PY1, (possibly because those layers cause changes to the chemistry). So the source or "rest of the ore body" may be far away from the wall and being constantly dissolved by the deep hydrothermal flow. These are just my rambling thoughts.
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That's interesting Prawn_man. Although the "hot toothpaste" analogy didn't really help me envisage the hydrothermal flow. And does this mean there may also be some credits for toothpaste? lol ...
(20min delay)
