Geology, Mineralogy, Petrography and Geochemistry of Amgaon Granite at Khursipar, Manegaon, Dahegaon Villages in Gondia District, Maharashtra, India

Author:
H.S. KALE*1, BHARTI GHODMARE2 and P.S. RAWALE3
Affiliation:

1-2Department of Geology, Rashtrasant Tukadoji Maharaj, Nagpur University, Nagpur (M.S) (India)
  3Bhartiya Mahavidyalay, Rajapeth, Amravati (M.S) (India)
  Email-mahakal46@gmail.com

Keyword:
Dongargarh Supergroup, Titanomagnetite, Trigonal System, Pleochroism.
Issue Date:
June, 2016
Abstract:

The rocks of the area belong to the early Precambrian, Amgaon Group and overlying Dongargarh Supergroup. They consist of granite gneisses and granite and area covering soil mantle. Physiographically the area is gently undulating developed on granitic gneiss and granite.Titanomagnetite deposit in the Khursipar-Dahegaon- Manegaonvillage is mainly associated with alternate bands of granite,epidorite,granitic gneiss and gabbroic rock. Massive magnetite, ore body flanked by foliated gabbro,disseminated, lensoid massive magnetite is exposed in small patch, small isolated magnetite lenses, disseminated ore in gabbroic rocks, massive or band passes into band ores. The principal iron mineral is hematite while ilmenite is main titanium bearing mineral goethite, magnetite are noticed in minor amounts. Microscopic studies show that orthorhombic pyroxenes are having straight extinction and stronger Pleochroism along with prismatic cleavages in perfect two directions at 90.

Hornblende is the principal mineral of amphibolites. Its cleavage angle at 56 and 124. It is opaque green, greenish brown or brown in colour.Ilmenite is a weekly magnetic Titanium-iron oxide mineral which is iron- blackor steel-grey. It is a crystalline iron titanium oxide (FeTi3). It crystallizes in a trigonal system.Magnetite is black or brownish-black in colour. Magnetite reacts with oxygen to produce hematite.The granite around Khursipar and Manegaon areas are oversaturated, the average content of SiO2 is 72.05 which are ranges from 70.45 to 73.45%. The bivariant plot of SiO2 verses mostof the major oxides show negative correlation whereas only MgO show slightly positive trend. The composition of all pure quartz is close to the 100 percent SiO2. The Mineral chemistry of Quartz of studied granite shows SiO2 content is 100%. The potash feldspar of granites is either Orthoclase or Microcline, or both. Orthoclase, Sanidine, Microcline and Anorthoclase.Nephelene of this granite show very high content of SiO2. Which is ranges from 56.82 to 59.6 along with moderate content of Al2O3(27.8 to 30.1) Na2O of this nephelene show (4.9 to 5.9) wt %). Whereas fair amount of K2O (4.2 to 5.3 wt %). Manegaon, Khursipar granite contains of accessory amount of orthopyroxene (hypersthenes). SiO2content of hypersthenes show very wide range (32.4 to 59.6 wt %). The average content of Fe2O3 is 19.4 whereas MgO ranges from 9.2 to 18.7%, along with it show few content of CaO (3.8) also. Hypersthenes of this granite show 1.5 % of Na2O with very little content of MnO and K2O. Magnetite of this study contains cent % composition of Fe2O3(98.7%) which is range from 98.1 to 99 %. The remaining elements are Al2O3 andK2O. The diagnostic characteristics of this magnetite is it content of V2O5 (0.4 to 0.9 wt %). In Ilmenite average
TiO2 concentration is 43.12 which is having wide range i.e. 35.0 to 48.88 similarly it is having Fe2O3 which is ranges from 49.9 to 51.8 and average content is 50.75 wt %. As per the standard it shows MgO and MnO also ranges 0.45 to 0.29 respectively.

Pages:
ISSN:
2319-8052 (Online) - 2231-3478 (Print)
Source:
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Copy the following to cite this article:

H.S. KALE*1, BHARTI GHODMARE2 and P.S. RAWALE3, "Geology, Mineralogy, Petrography and Geochemistry of Amgaon Granite at Khursipar, Manegaon, Dahegaon Villages in Gondia District, Maharashtra, India", Journal of Ultra Scientist of Physical Sciences, Volume 28, Issue 2, Page Number , 2016

Copy the following to cite this URL:

H.S. KALE*1, BHARTI GHODMARE2 and P.S. RAWALE3, "Geology, Mineralogy, Petrography and Geochemistry of Amgaon Granite at Khursipar, Manegaon, Dahegaon Villages in Gondia District, Maharashtra, India", Journal of Ultra Scientist of Physical Sciences, Volume 28, Issue 2, Page Number , 2016

Available from: http://www.ultraphysicalsciences.org/paper/300/

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