identities‚ but the minerals will include seven of those listed below. To help you identify them‚ refer to the Mineral Identification Job Aid. • Borax • Calcite • Corundum • Graphite • Gypsum • Orthoclase feldspar • Pyrite • Quartz • Talc • Topaz 4. Post Part 1‚ Part 2‚ and Part 3 in this worksheet as an attachment to your Assignment Section. Delete the introductory instructions in this worksheet before you submit it to your
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Rock crushing‚ splitting samples‚ drying and grinding: Preparation for rock powder. Demonstrator: Encik Zamrut Daunar Date (and venue): 28 July 2010 (Basement) Aim: To crush‚ split‚ and grind solid sample rock for preparing rock powder. Objective: 1. To learn the techniques and mechanisms of preparing rock powder; which will be used as a sample for Bernas Bomb and XRF/ XRD techniques. 2. To know the processes and machines used in the rock crushing and sample preparation. Apparatus/
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your percentage of certainty: What was confusing about this mineral? What other minerals do you think it could be? Remember‚ the minerals in the virtual lab include seven of the following: borax‚ calcite‚ corundum‚ graphite‚ gypsum‚ orthoclase feldspar‚ pyrite‚ quartz‚ talc‚ and topaz. Identification of Mineral Percent Certain Explanation of Certainty Example: Fluorite 80% certain I am almost certain this mineral is fluorite‚ but I am not completely sure. Fluorite and gypsum are both white
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Reaction Series? -Plagioclase Feldspar 6. Which of the following minerals (as shown by their chemical formulae) has a neutral (zero) charge given that Si= +4‚ Al= +3‚ Ca= +2‚ O= -2? -CaSi2Al2O8 7. The differentiation of magmas due to removal of crystal is known as? -Crystal Fractionation 8. Which of the following atoms has a net charge of negative one? -5 protons and 6 electrons 9. The most common mineral or mineral group in the Earth’s crust is? -Feldspar 10. Felsic rocks are? -Have
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Mineral Identification Worksheet Part 1: Recording Observations In the chart below‚ record your observations of each test for the seven minerals. After you have completed all tests‚ name the minerals in Part 2 of this worksheet. An example of how to fill out the chart is illustrated below. |Recorded Observations for Minerals 1-7 | |Tests
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Summary of the geology of Gunung Jerai Gunung Jerai is a mountainous region located in central Kedah‚ between the borders of Kuala Muda and Yan district. The highest point of Gunung Jerai is recorded to be 1217 meters and Gunung Jerai covers a total area of 86.4 square kilometers (Lee et al.‚ 2004). According to Bradford (1972)‚ the existence of Gunung Jerai can be related to the Jerai Formation and the Patani Formation. The Jerai Formation‚ named after Gunung Jerai itself‚ is of Cambrian age with
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Igneous Textures Cooling rates influence igneous rock textures. Rapid cooling at the earth’s surface results in tiny mineral crystals that can only be seen under a microscope. The resulting extrusive igneous rocks have an aphanitic texture. Rocks that form as magma cools slowly underground (intrusive igneous rocks) develop phaneritic textures‚ in which individual mineral crystals can be seen without a microscope. Some igneous rocks exhibit visible crystals (phenocrysts) in a matrix of tiny
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can be found in all sorts of rocks. Igneous rocks sometimes contain large quartz crystals. Mica minerals Mica minerals make some rocks sparkle! They are often found in igneous rocks such as granite and metamorphic rocks such as schist. Feldspar Feldspar is the most common mineral in the Earth’s crust‚ so you are very likely to find it in the rocks you collect! It is found it all of the three rock types‚ but is most common in intrusive igneous rocks like granite where the crystals look white
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reach biotite which remains stable at all lower temperatures. The “continuous series‚” however‚ behaves differently while temperatures change the feldspar will take in calcium‚ calcium and sodium‚ or only sodium ions. This makes the transition from high temperature calcium plagioclase to lower temperature sodium plagioclase gradual and can produce a feldspar with any proportion of these two ions. The main branch of Bowen’s reaction series takes place among the lower temperatures and consists of potassium
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Handout Differentiation of Magmas By Fractional Crystallization Karl R. Wirth Geology Department Macalester College St. Paul‚ MN 55105 wirth@macalester.edu Purpose: * improve understanding of fractional crystallization and magmatic differentiation * utilize mineralogy concepts (e.g.‚ stoichiometry) * utilizeclassification and chemical variation diagrams * provide practical experience designing and using spreadsheets * provide appreciation of the historical origins
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