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Gold Prospecting
Hard Rock Gold Prospecting
Learn me about granite(s)
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<blockquote data-quote="The Green Wanderer" data-source="post: 172526" data-attributes="member: 784"><p>Was a bit of a mystery to me too the first time I came across the term Atomrat. It basically describes the formation of the granite is all, granites vary so much that the easiest way to classify them was by size then composition then age.</p><p>Spend a few hours one evening on google searching the different terms and how granites form, that will go a long way to helping you understand them.</p><p>Hard to tell from yout photo but it looks like youve got a granite with pyrites through it, the top dark green/grey one which im assuming is the hard one?</p><p>The bottom one looks to be mostly feldspar and quartz which is the soft crumbly one, that would be called a disseminated granite where the bonds between crystals have been broken down by age and weathering or chemicals.</p><p>Porphyric granites are irregular in the size of crystals present ie you would have lots of quartz with large crystals of feldspar and odd sized crystals of other minerals that were present when the granite formed.</p></blockquote><p></p>
[QUOTE="The Green Wanderer, post: 172526, member: 784"] Was a bit of a mystery to me too the first time I came across the term Atomrat. It basically describes the formation of the granite is all, granites vary so much that the easiest way to classify them was by size then composition then age. Spend a few hours one evening on google searching the different terms and how granites form, that will go a long way to helping you understand them. Hard to tell from yout photo but it looks like youve got a granite with pyrites through it, the top dark green/grey one which im assuming is the hard one? The bottom one looks to be mostly feldspar and quartz which is the soft crumbly one, that would be called a disseminated granite where the bonds between crystals have been broken down by age and weathering or chemicals. Porphyric granites are irregular in the size of crystals present ie you would have lots of quartz with large crystals of feldspar and odd sized crystals of other minerals that were present when the granite formed. [/QUOTE]
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Gold Prospecting
Hard Rock Gold Prospecting
Learn me about granite(s)
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