Petrochemistry and Manganese Mineralization Potentials of the Calc-alkaline Granitoids from Northeastern Hawal Massif, North-Eastern Nigeria

2019 ◽  
Vol 16 (1) ◽  
pp. 18
Author(s):  
Vandi Kamaunji ◽  
Ntekim Eyo ◽  
Hafizullah Ahmed
Keyword(s):  
Calc Alkaline ◽  
North Eastern ◽  
Manganese Mineralization

scholarly journals IMMOBILE TRACE ELEMENTS DISCRIMINATION DIAGRAMMS WITH ZEOLITIZED VOLCANICLASTICS FROM THE EVROS - THRACE - RHODOPE VOLCANIC TERRAIN

2017 ◽  
Vol 43 (5) ◽  
pp. 2455 ◽  
Author(s):  
K. Kitsopoulos
Keyword(s):  
Trace Elements ◽  
Wide Spread ◽  
Upper Eocene ◽  
Calc Alkaline ◽  
Parent Materials ◽  
High K ◽  
North Eastern ◽  
Volcanic Terrain ◽  
Differentiation Index ◽  
Thrace Region

The Rhodope and Evros areas of the Thrace Region in north-eastern Greece and the adjusted areas in Bulgaria are characterized by wide spread volcanic formations of Upper Eocene to Miocene in age. The volcaniclastic materials associated with such formations have, in some cases, undergone inter alia a notable zeolitization process. The mineralogy of the altered volcaniclastics is often dominated by clinoptilolite -heulandite type of minerals. The Winchester and Floyd (1977) plots indicating rhyodacite/dacite to trachyandesite parent materials, while the similar diagram, as modified by Pearce (1986), indicate andesite to trachyandesite precursors. The alkalinity index (Nb/Y ratio) seems to coincide between the two types of diagrams, but, there is a notable difference of the differentiation index, i.e. the Zr/TiO2 ratio. The Th-Co diagram (Hastie et al., 2007) unfolds a clearer picture for the nature of the precursors and reveals a clear progression of a calc-alkaline to a high-K calc alkaline affinity of the parental volcanic materials.

Discussion on “The grinding wheel and production” at the North-Eastern Section of the Institution

1942 ◽  
Vol 21 (8) ◽  
pp. 315
Author(s):  
Bowen ◽  
Vickery ◽  
Buchanan ◽  
Swallow ◽  
Perks ◽  
...  
Keyword(s):  
Grinding Wheel ◽  
The North ◽  
North Eastern

PRELIMINARY PHYTOCHEMICAL ANALYSIS OF SELECTED MEDICINAL PLANTS OF NORTH EASTERN REGION OF INDIA

2018 ◽  
Vol 7 (4) ◽  
pp. 88-97
Author(s):  
MELAKYRKHU NIANGMIH ◽  
SAMIRAN CHUTIA ◽  
DAS BANYASHREE ◽  
SARKAR BAPI ROY ◽  
DEY BIPLAB KUMAR ◽  
...  
Keyword(s):  
Medicinal Plants ◽  
Phytochemical Analysis ◽  
Eastern Region ◽  
North Eastern
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