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Gold/Mining/Energy : Nuinsco Resources (NWI) -- Ignore unavailable to you. Want to Upgrade?

To: donkeyman who wrote (987)	2/21/1999 4:33:00 PM
From: Gord Bolton	Respond to of 5821

The way I understand it Donkeyman, is that there is your basic Granite shield rock at the bottom of the hole. They were drilling through gneiss gabbro which had some nickel in it. Near the contact point between the gneiss and the granite there was the 3.2 meters of 10% nickel. You will not find nickel in the granite. The gneiss lies overtop the granite and outcrops on surface. From the point of contact in the last hole the gneiss-granite contact point slopes downward-towards the main part of the gneiss anomoly. If we refer to the 10% section as a lense and I think that we all hope that it is. We would say that it is a down dipping lens following the contact point between the granite and gneiss. Depending on what all is controlling the concentration of the nickel, we might (hope) expect that the lens might be wider as the contact point goes deeper-or not! Peope are betting that it will. I hope that I have that all more or less right. If someone has a clearer picture please fell free to put it forward.

To: donkeyman who wrote (987)	2/21/1999 8:47:00 PM
From: Gord Bolton	Read Replies (2) \| Respond to of 5821

Previous post. I don't think that I explained that worth a sh** and I have some facts wrong. The way I understand it Donkeyman, is that there is your basic Granite shield rock and gneiss at the bottom of the hole. They were drilling through norite gabbro which had some nickel in it. Near the contact point between the gabbro and the gneiss there was the 3.2 meters of 10% nickel. The gabbro lies overtop the gneiss and outcrops on surface. From the point of contact in the last hole the gabbro-gneiss contact point slopes downward-towards the main part of the gabbro anomoly. If we refer to the 10% section as a lense and I think that we all hope that it is. We would say that it is a down dipping lens following the contact point between the gabbro and gneiss. Depending on what is controlling the concentration of the nickel, we might (hope) expect that the lens might be wider as the contact point goes deeper-or not! Peope are betting that it will. Click this for very good graphics and more explanation volcano.und.nodak.edu Igneous Rocks - Any rock formed by cooling and crystallization of rock. Extrusive - cooled rapidly (e. g. lava) intrusive - cooled slowly (underground). -----------Felsic---------Intermediate-------Mafic----- Ultra Mafic Color------Light----------Medium-------------Dark-------Very Dark Extrusive--Rhyolite-------Andesite----------------------Basalt Intrusive--Granite--------Diorite------------Gabbro-----Peridotite Gabbro is a coarse-grained, intrusive igneous rock, the main minerals being plagioclase (i.e. a mixture of calcium and sodium feldspar), olivine, pyroxene. The essential minerals are dark apart from some of the feldspars and therefore the rock is usually dark or greenish. Gabbro forms deeper in the earth's crust than basalt and occurs as batholiths and laccoliths. These are often found along mid-ocean ridges or in ancient mountains composed of compressed oceanic crust. In Iceland, there are a few small batholiths or laccoliths and then often with granophyre. A norite is a gabbro in which the pyroxene is principally orthopyroxene. Intrusive rocks If the magma never bubbles to the surface but cools in place as a large block, it is called gabbro, granite or diorite, depending upon whether it is a basic, acidic or intermediate rock, as follows: granite (acidic) diorite (intermediate) gabbro (basic) If the magma is erupted to the surface as lava, the resulting rock is called extrusive. Metamorphic Rocks - Any rock type altered at high temperature and pressure, and chemical activities of fluids. Metamorphism can be regional - affecting large area w/ pressure dominant process or contact - a local effect due to heating of country rock from intrusion (temperature dominant). Metamorphic Rock Classification Foliated (crystals are aligned) Shale = Slate, Phyllite, Schist, Gneiss Non-Foliated - Basalt/Shale = Hornfels, Limestone = Marble, Sandstone= Quartzite Gneiss is a term used to identify banded metamorphic rock that contains mostly elongated and granular, as opposed to platy, minerals. The most common minerals found in gneiss are quartz, potassium feldspar and sodium felspar. There is also a smaller amount of muscovite, biotite and hornblende. Gneiss is easily identifiable by the segragation of light and dark minerals giving it a banded texture. Most gneisses consist of alternating bands of light and dark.