First report of metamict alluaudite (A sodium iron manganese phosphate mineral) from Pisangan, Ajmer district, Rajasthan
详细信息 查看全文
- 作者：Yamuna Singh ; R. Viswanathan ; K. L. Mundra…
- 关键词：Mineralogy ; Metamict Alluaudite ; Pisangan. Rajasthan
- 刊名：Journal of the Geological Society of India
- 出版年：2016
- 出版时间：January 2016
- 年：2016
- 卷：87
- 期：1
- 页码：55-61
- 全文大小：2,012 KB
- 参考文献：Boynton , W.V. (1984) Geochemistry of the rare earth elements: meteorite studies. In: Henderson, P. (Ed.), Rare earth element geochemistry: developments in geochemistry, 2, Elsevier, Amsterdam, pp.63–114.
Cerny , P. (1989) Characteristics of Pegmatite Deposits of Tantalum. in: P. Moller, P. Cerny and F. Saupe (Eds.), Lanthanides, Tantalum, and Niobium. Society For Geology Applied To Mineral Deposits, Spl. Pub. 7, Springer-Verlag, Pp. 192–236.
Ellsworth , H.V. (1932) Rare-Earth Element Minerals of Canada. Can. Geol. Survey, Econ. Geol. Ser. 11.
Fisher , D.J. (1955) Alluaudite. Amer. Mineral., V.40, Pp.1100–1109.
Gaines , R.V., Skinner , H.C.W., Foord , E.E., Mason and Rosenzweig , A. (1997) Dana’S New Mineralogy, 8th Edition, John Wiley & Sons, Inc., 1819P.
Heinrich , E. Wm. (1958) Mineralogy and geology of radioactive raw materials. McGraw Hill Book Company Inc. New York, 654p.
Hutton , C.O. (1950) Studies of heavy detrital minerals. Geol. Soc. Amer., Bull., no.61, pp.635–716.CrossRef
Jayalal (2008) Preliminary assessment of pegmatite for rare earth and rare metals in parts of Ajmer, Udaipur, Bhilwara and Pali districts, Rajasthan. Rec. Geol. Surv. India, v.140, Pt. 7, pp. 38–39. (Extended abstracts for progress reports for the field season 2005-2006, Western Region, G.S.I., Jaipur).
Moore , P.B. (1971) Crystal chemistry of the alluaudite structure type: contribution to the paragenesis of pegmatite phosphate giant crystals. Amer. Mineral., v.56, pp.1955-1974.
Moore , P.B. and Ito , J. (1979) Alluaudites, wyllieites, arrojadites: crystal chemistry and nomenclature. Mineral. Mag., v.43, pp.227–235.CrossRef
Palache , C., Berman , H. and Frondel , C. (1951) Dana’s system of mineralogy. 7th Edition, v. II, pp.674–675.
Pieczka , A. (2007) Beusite and an unusual Mn-rich apatite from the Szklary granitic-pegmatite, Lower Silesia, SW Poland. Can. Mineralogist, v. 45(4), pp.901–914.CrossRef
Robinson , G.W., Velthuizen , J. Van Ansell , H.G. and Sturman , B.D. (1992) Mineralogy of the Rapid Creek and Big Fish River area. Yukon Territory. Mineral. Record, v. 23(4), pp.1–47, esp. 34-36.
Singh , Y., Viswanathan , R., Goyal , N., Panigrahi , B., Jain , P.K. and Khandelwal , M.K. (2010) X-ray diffraction and geochemical studies in columbite-tantalites from Richhmaliyan, Ajmer district, Rajasthan, India. Indian Mineralogist, v.44(1), pp.137–151.
Singh , Y., Viswanathan , R., Parihar , P.S. and Maithani , P.B. (2013) X-ray crystallography of uraninites associated with the albitite belt of western India: Evidence for the high-temperature origin of uranium and associated mineralisation. Jour. Geol. Soc. India, v.81(1), pp.79–90.CrossRef
Sinha , D.K., Fahmi , S., Bhatt , A.K., Singh , G. and Singh , R. (2000) Evidences for soda metasomatism in Ladera-Sakhum areas, northeastern Rajasthan, India. Jour. Geol. Soc. India, v.56, pp. 573–582.
Yadav , O.P., Hamilton , S., Vimal , R., Saxena , S.K., Pande , A.K. and Gupta , K.R. (2002) Metasomatite and albitite related uranium mineralisation in Rajasthan. Explor. Res. At. Minerals, v. 14, pp. 109–130.
Yadav , O.P., Saxena , S.K., Pande , A.K. and Gupta , K.R. (2004) Sodic metasomatism- a feature of tectonomagmatic activation in Khetri sub-basin, Rajasthan, India. Geol. Surv. India, Spec. Publ., v.72, pp. 301–312. - 作者单位：Yamuna Singh (1)
R. Viswanathan (1)
K. L. Mundra (2)
P. Jagadeesan (3)
A. K. Sharma (1)
1. Department of Atomic Energy, Government of India, Atomic Minerals Directorate for Exploration and Research, Begumpet, Hyderabad, 500 016, India
2. Department of Atomic Energy, Government of India, Atomic Minerals Directorate for Exploration and Research, Pratapnagar, Jaipur, 302 033, India
3. Department of Atomic Energy, Government of India, Atomic Minerals Directorate for Exploration and Research, Nagarbhavi, Bangalore, 560 072, India - 刊物类别：Earth and Environmental Science
- 刊物主题：Geology
Geosciences
Geography
Mineralogy - 出版者：Springer India, co-published with Geological Society of India
- ISSN：0974-6889
文摘
For the first time we report alluaudite from India, which is metamict and is hosted in a zoned pegmatite, near Pisangan, Ajmer district, Rajasthan. Alluaudites known till date, all over the world, are non-metamict type. Therefore, the alluaudite reported from the area is the first locality in the world for the metamict-type of alluaudite. The most conspicuous features exhibited by the alluaudite are various types of cracks in different directions and shapes, including its isotropic nature. The calculated crystallographic parameters of the reported alluaudite are: a0 = 11.9874 Å, b0 = 12.5144 Å, and c0 = 6.4136 Å, β = 114.240 with unit-cell volume (V) = 877.31 Å3, which are in agreement with the values of alluaudite standard. Geochemical data indicates high content of P (32.30% P2O5), Fe (30.2% Fe2O3), Mn (10.62% MnO), besides Mg (7.71% MgO), Ca (5.60% CaO), Na (3.40% Na2O) and Si (2.30% SiO2), and appreciable amount of water of hydration (3.50% LOI). It is highly radioactive due to uranium (2.28% U3O8) and thorium (185 ppm Th). Calculated structural formula of the alluaudite is Na1+ 0.59Ca2+ 0.54Mn2+ 0.80Mg2+ 1.02Fe3+ 2.03Al3+ 0.037U4+ 0.043P5+ 2.45O12. The chondrite-normalised plot shows enrichment of HREE relative to LREE with pronounced negative Eu-anomaly (Eu/Eu* = 0.46). Such a high negative Eu-anomaly suggests extremely fractionated nature of the host pegmatite. Keywords Mineralogy Metamict Alluaudite Pisangan. Rajasthan