Fluorspar
The mineralization of Fluorspar occurs around Salwari or Chokri village of Sikar, and is spread in an area of 10 kms. This place is situated at a distance of 6kms form the main bus route from Khandela to Udaipurwati. Fluorspar occurs here as a very fine grained pink granite. Being aplitic in nature, it interfers with the biotite-schist ofAjabgarh Group.
Iron Ore
Dabla Region: Iron ore deposits are found in a scattered wasy around the railway station of Dabla. This region contains medium grained pink, grey coloured granite rocks, that are partially weathered at surface. These granites contain Iron. It is found in the form of small segregated rolled masses of haematite. The iron content in these granites varies from 50 to 60%.
Thoi Region: Iron ore is also found in the eastern and northern regions of Thoi village. Hematite containing mica was being mined in this region but now it is being closed.
Neem-ka- Thana Region: This region contains mica in two areas namely, Bagoli Sarai- Papra- Pachlangi region, and the Raipur- Nanawas- Toda Chiplata regions. The Bagoli Sarai region is about 10km to the west of the railway station of Neem -ka- Thana while the other is about 16 to 22 km to the east the railway station. Iron ore in first area occurs as haematite quartzite bands, touching the schists & quartiztes. Whereas in the second area, the iron ore body occurs as bands in the schists. The content of iron in these ores range from 59% to 67%.
The Iron ore is found in an area of 1.5kms in the form of micaceous haematite, massive haematite and magnetite bands, that are approximately 7 m thick. In continuation to this, small bands of iron ore are found near Toda¬Chiplata. But this is not of good quality and contains high phosphor...
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...ble in Sikar.
Granite
Granite is found in large number of areas in Sikar. These include Jeetala, Dabla, Kharbipura, Sirohi, Ajitgarh, Saladipura and Chapoli. The granite reserves are found in the form of high hillocks and also in isolated boundary outcrops. Their color may be light earthy to pinkish with red garnet spots. Granite is mostly medium grained but can also be coarse grained, and thus forms an overall granular texture. Famous variants of Granite are Ajitgarh Grey and Ajitgarh White. Department of Mining has identified the granite regions of Sikar as follows:
Jugalpura, 51 plots, Ladi-ka-Bas 402 plots, Kala Khera 225 plots, Biharipura 201 plots, Dabla 186 plots, and Jetpura 111 plots. However, these details may vary according to the Directorate of Mines and Geology ,Udaipur, Superintendent Geologist Granite Jaipur and Mining Engineering of Neem-ka- Thana.
Riley, C.M. "Lahars." Geological and Mining Engineering Sciences. Michigan Tech. Web. 6 Feb. 2010. .
From the above discussion, it is obvious that the geology of the Superstition mountain and the adjacent areas is complex. Most parts of the mountain express a diverse geological formation. Although the areas surrounding the mountains are believed to be rich in minerals, dead-seated deposits of minerals still seem elusive to the modern mineral prospectors. This explains the absence of mining companies in the area for a long time.
The Quartzite at Kamiak Butte is a very hard rock. It measures about a 7 on Moh’s hardness scale.2 Kamiak Butte is present today because of how hard this rocks composition is. It does not erode very easily.2 Quartzite has a sugary texture and carries an orange/tan color on the butte.2 Quartzite is everywhere around Kamiak butte.
Plummer, C.C., McGeary, D., and Carlson, D.H., 2003, Physical geology (10th Ed.): McGraw-Hill, Boston, 580 p.
...are large and well-exposed mafic phreatomagmatic complexes that span an area of approximately 40 km squared. The mesas hold a large tuff cone in the south side and a large tuff ring on the northeast side. The Table Rocks are a good example of inverted relief, in which previous topographic low’s are filled with a resistant rock and become new topographic highs after the erosion of the surrounding region takes place.
At the base there is a dry creek bed of granite that has been cut by a series of fractures. Fine black rock along these fractures is called gouge. Fault gouge is comprised of little pieces of rock that was ground upward when the fault moved. Once you go up the trail and climb past the trees to the large space of bare rock, you are on the exfoliation dome. At this point you can examine the “coarse-grained porphyritic granite that makes up the majority of Enchanted Rock”. As you examine the surface, you will see how the granite magma cut into the surrounding rocks. When this occurred over a billion years ago, the magma was a combination of very hot liquid and crystals. Once you reach the mid-point of the climb you can see to your right a boulder-covered granite hill known as “castle tor”. An area on the rock that looks like a line down the slope is called an aplite dike. Several of these cut the rock; these consist of fine-grained granite with a sugary texture and minimal biotite. Dike describes the crack where molten rock has been inserted. As you climb up the front, a section of rock has a texture change. This appears to be a Ductile Shear Zone, a long narrow change that has a more fine grain consistency.
Minerals play an important role in our day-to-day life but we often not contemplate how the minerals are obtained. Minerals are scattered all over the world just like any other resources. Due to the natural processes of magma flow, hydrothermal gradients, sedimentation, and evaporation, Minerals are concentrated in various areas of the Earth’s crust. Obtaining these minerals for human use involves four general steps:
Recently in the Bismarck Sea there have been discoveries of rich minerals imbedded in the sea floor such as gold, lead, cobalt, silver, copper and zinc. We only have a short time left of gold, 16 years. There are several volcanoes located around the Bismarck Sea, which means there are many mineral deposits coming out from under the sea floor leaving deep pockets rich in coal and minerals. As the tectonic plates are moving they are activating volcanic eruptions, releasing minerals into the sea floor. With the tectonic plates continuously moving, the minerals and metal ores are shifting into the sea floor pockets causing the volcanoes to erupt coal and ores. The edge of the tectonic plates run directly under this site, subsequently releasing minerals from the magma below into the ocean floor.
Michigan is second only to Minnesota in iron ore production. Iron ore is mined in the Upper Peninsula. The state's other chief mineral products, natural gas and petroleum, are found in the northern part of the Lower Peninsula. Michigan is also an important producer of sand and gravel, crushed stone, and salt.
Villaros, A., Stevens, G., Moyen, J. & Buick, I.S. 2009, "The trace element compositions of S-type granites: evidence for disequilibrium melting and accessory phase entrainment in the source", Contributions to Mineralogy and Petrology, vol. 158, no. 4, pp. 543-561.
The early soils in the Lake District are thought to have been far more alkaline than they are today, particularly those formed from the rocks of the Borrowdale Volcanic Series, which displays veins of white calcite (Pearsall & Pennington, 1973). If a fresh surface of Borrowdale Volcanic rock is exposed, it will react with hydrochloric acid, showing that calcium carbonate is present.
Ages ago, metamorphic rock began forming a flat-topped hill at the base of Kilimanjaro. It formed inside this hill and the gemstone world has never been the same again. The local people as well as the jewelry industry fell in love with the shades of blue and purple found in them.
This particular sample of granite is phaneritic in texture as described by its visible crystals. The rate at which the rocks cool determines the size of the crystals, in this case, a steady cooling rate produces larger crystals (“Characteristics of Igneous Rocks” n.d). The rate at which rocks cool is also related to the temperature of cooling which determines a rocks mineral composition (“Characteristics of Igneous Rocks” n.d). A low cooling temperature yields rocks with higher amounts of potassium, aluminum, and silicon (“Characteristics of Igneous Rocks” n.d). This is evident by the abundance of potassium feldspar, which also makes granite a felsic
Some people believe the iron to be of volcanic origin, weathered and transported into the oceans or e...
Mining is the process or industry of obtaining minerals from the earth. Topics in this paper I’ll be specifically discussing are pros and cons of mining, structures of a mine, mining in general, California gold rush, diamonds in Africa, and comparison of diamond and gold mines.