Qap ternary diagram3/29/2024 ![]() ![]() I would have thought that if you drew a line from each percentage they are all meant to overlap at one point and give you your rock name. The quartz and plagioclase percentage lines overlap in the quartz monzonite box but alkali's percentage doesn't match up. That takes me to the second row which has quartz monzodiorite in it. Old enough to have grandsons Slow enough to study rocks Thirsty enough to build a pub. I've spent a while now trying to figure it out and it's probable very simple! If some kind soul can tell me how to do it but in very simple terms Many thanks for any help.īass Naked Science Forum King! Plot the percentages of feldspar, then move the plot to the percentage quartz in the rock and that point should give you the type of rock. I understand how to get the three percentages but I don't understand how you can use them three percentages to identify the rock. How is a QAP Diagram used to identify rocks? Hello there, I am studying for a Geoscience degree with the Open uni and at the moment I am learning how to plot a QAP diagram for plutonic igneous rocks but I am confused. Started by Simulated Board General Science. ![]()
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