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Sluicing at Reedy Creek Woolshed Falls
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<blockquote data-quote="Hawkear" data-source="post: 642548" data-attributes="member: 4728"><p>I was hoping that the explanation might point more directly to at least some of the crystals being formed directly within a vein or reef within our goldfields reefing system </p><p>If that were to be the case the composition of the enclosed fluid may be a long preserved representative of the hydrothermal fluids that contributed to the formation of the reefs and shed light on the conditions under which they were formed.</p><p>Regarding the development of bubbles after exposure, I could imagine that if formed under pressure and temperature deeper down, once enhydro crystals are cooled and exposed at the surface negative pressure differences may exist between the outside and the fluidic inside of the crystal. Microfractures in the quartz may then admit air to form the bubbles until pressures are stabilised.. May explain the phenomenon of bubbles developing after exposure. </p><p>Regardless of the different ways they can be formed in veins or petroleum deposits they are beautiful specimens. Had a look once up in Beechworth but no luck in following up the early finds. Would love anyone on this forum to say if they have had any success finding any.</p></blockquote><p></p>
[QUOTE="Hawkear, post: 642548, member: 4728"] I was hoping that the explanation might point more directly to at least some of the crystals being formed directly within a vein or reef within our goldfields reefing system If that were to be the case the composition of the enclosed fluid may be a long preserved representative of the hydrothermal fluids that contributed to the formation of the reefs and shed light on the conditions under which they were formed. Regarding the development of bubbles after exposure, I could imagine that if formed under pressure and temperature deeper down, once enhydro crystals are cooled and exposed at the surface negative pressure differences may exist between the outside and the fluidic inside of the crystal. Microfractures in the quartz may then admit air to form the bubbles until pressures are stabilised.. May explain the phenomenon of bubbles developing after exposure. Regardless of the different ways they can be formed in veins or petroleum deposits they are beautiful specimens. Had a look once up in Beechworth but no luck in following up the early finds. Would love anyone on this forum to say if they have had any success finding any. [/QUOTE]
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Sluicing at Reedy Creek Woolshed Falls
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