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Gold/Mining/Energy : Golden Eagle Int. (MYNG) -- Ignore unavailable to you. Want to Upgrade?

To: E. Charters who wrote (11557)	7/30/1998 12:53:00 PM
From: toma	Read Replies (2) \| Respond to of 34075

E. Charters - you seem to be mis-using the term lapilli...lapilli refers to the portion of pyroclastic fallout deposits, also called tephra, ranging in size from about .2 to 6.5 centimeters. In geology the term is specific to pyroclasts. Once the material is emplaced and subsequently eroded and redeposited, the size designations are treated using traditional sediment classifications - in this case you would be refering to mediun to very course sand and gravel. Does the mining community treat the term lapilli differently? Is this because of the material of origin? And, if so...are many gold "hardrock" gold deposits formed during pyroclastic (explosive volcanic) events...as opposed to intrusive evens such as the thermal process you referenced earlier? secondly...as semantics go, you said something earlier that I would like you explain a little more deeply...you stated that it is not depostion but removal that forms a placer deposit. a placer by deposition results from the deposition of material...do you really mean that the ultimate location of the placer results from the mechasisms of removal - that is, the erosional process as a whole? certainly the occurance and geometry of the deposit is based on the nature of depositional environment as a whole, including hydrologic and topographic character of the alluvial plain. thanks and keep the information flowing, toma