scholarly journals Petrology of P-5 and P-13 kimberlite from Lattavaram kimberlite cluster, Wajrakarur kimberlite field, Andhra Pradesh, India

2019 ◽  
Keyword(s):  
Andhra Pradesh ◽  
Kimberlite Field

Mineralogy of the P2-West ‘Kimberlite’, Wajrakarur kimberlite field, Andhra Pradesh, India: kimberlite or lamproite?

2013 ◽  
Vol 77 (8) ◽  
pp. 3175-3196 ◽  
Author(s):  
Gurmeet Kaur ◽  
R. H. Mitchell
Keyword(s):  
Andhra Pradesh ◽  
Evolutionary Trend ◽  
Evolutionary Trends ◽  
Similar Material ◽  
Alkaline Rocks ◽  
Fine Grained ◽  
Hypabyssal Kimberlite ◽  
Bona Fide ◽  
Kimberlite Field ◽  
Representative Material

AbstractA detailed mineralogical examination of representative material from the P2-West 'kimberlite' located in the Wajrakarur Kimberlite Field (India) demonstrates that significant differences exist between these rocks and archetypal hypabyssal kimberlite. The intrusion consists of an olivine-phyric facies which has been transected by, and includes clasts of, a consanguineous phlogopite-rich pegmatitic facies. The olivine-rich parts of P2-West are relatively fresh and consist of euhedral-to-subhedral microphenocrystal olivine set in a groundmass of fine-grained anhedral monticellite, amoeboid apatite, and subhedral-to-euhedral perovskite within a partially chloritized-to-fresh phlogopite-rich mesostasis. The rock lacks the abundant olivine macrocrysts characteristic of kimberlite. Monticellite crystals are commonly partially or completely replaced by pectolite and hydrogarnet. Similar material occurs as irregular aggregates randomly scattered throughout the groundmass. The groundmass, in contrast to that of hypabyssal kimberlites, is relatively poor in spinels. Atoll spinels are absent, with the majority of spinels occurring principally as mantles upon microphenocrystal olivine. Disaggregated cumulate-like assemblages of intergrown anhedral perovskite and spinel are common. Spinel compositions are unlike those of kimberlites and their evolutionary trend is similar to that of lamproite and lamprophyre spinels. The pegmatitic facies of the intrusion are highly and pervasively altered, and characterized by the presence of large clasts, veins, and irregular aggregates consisting of large (1–5 mm) crystals of pinkish-bronze Al-poor phlogopite intergrown with and/or including: apatite; pectolite-hydrogarnet pseudomorphs after an unidentified euhedral phase; chlorite laths; barytolamprophyllite; perovskite; tausonite; diverse Sr-Ba-carbonates; and baryte. The presence of barytolamprophyllite and tausonite are typical of potassic undersaturated alkaline rocks and have never been reported from kimberlite; however, neither feldspar nor feldspathoids are present in P2-West. Micas in fresh and altered rocks are Al2O3- and BaO-poor, and exhibit compositional evolutionary trends towards tetraferriphlogopite rather than kinoshitalite. On the basis of these mineralogical data it is suggested that P2-West represents an unusual lamproite-like intrusion which has undergone extensive hydrothermal deuteric alteration and should not be considered a bona fide kimberlite.

Existance of Soil Flora in the Soils of Oil Palm Growing Areas of Andhra Pradesh

2011 ◽  
Vol 3 (8) ◽  
pp. 23-27
Author(s):  
G. Swarna latha G. Swarna latha ◽  
◽  
Dr. Amara Srinivasulu ◽  
G. Suneetha G. Suneetha
Keyword(s):  
Oil Palm ◽  
Andhra Pradesh

Study of some Sacred plants of Kadapa District, Andhra Pradesh, India

2011 ◽  
Vol 4 (8) ◽  
pp. 33-34
Author(s):  
Dr. Nivedita Deshmukh ◽  
◽  
Menka Mishra
Keyword(s):  
Andhra Pradesh

Globalization - Telugu Literature - Cultural Games in Our Villages - A Study on Kurnool District of Andhra Pradesh

2012 ◽  
Vol 3 (4) ◽  
pp. 250-251
Author(s):  
M Venkatalakshmamma M Venkatalakshmamma ◽  
◽  
N Munirathnamma N Munirathnamma
Keyword(s):  
Andhra Pradesh

Empowering Women with HIV in Entrepreneurship Activities in Vijayawada Region – Andhra Pradesh

2012 ◽  
Vol 3 (8) ◽  
pp. 1-3
Author(s):  
K.Kalpana K.Kalpana ◽  
◽  
Dr.Saraswati Raju Iyer ◽  
Dr.S.Ramesh Dr.S.Ramesh
Keyword(s):  
Andhra Pradesh ◽  
Women With Hiv
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