Major Minerals

I. STATUS OF COAL EXPLORATION IN NAGALAND

Sl.No

Block Name

District

Area
(Sq.Km)

UNFC
Stage

Year

Drilling
In
meter

Resource
Categories
(MT)

Total
Resource
(MT)

Quality

1

Northern Khar Coal Block 

Mokokchung

8.21

G2

2010 – 2014

1591.40

95.04 (333)

29.29 (334)

124.33

Non coking,
High moisture, Low ash,
GCV 5000- 6500 K.cal./kg,
High Sulphur,
Sub-Bituminous

2

Changki Coal Block A

-do-

7.51

G2

2014 – 2017

1659.70

21.83 (332)

14.14 (333)

16.97 (334)

52.94

Non coking,
High moisture, Low ash,
GCV 3947 – 7112 K.cal. /kg,
High Sulphur,
Sub-Bituminous

3

Changki Coal Block B

-do-

13.7

G2

2017 – 2021

3791.05

Geological report compilation, resource estimation in progress

4

Mongchen-Dibuia Coal Block

-do-

7.6

G2

2021

3200

(Target)

Exploration activities ongoing

5

Yimchenkimong-Molungyimsen Coal Block

-do-

30.56

G4

2021

3400

(Target)

Exploration activities ongoing

II. STATUS OF MINERAL EXPLORATION OF MULTI-METAL MAGNETITES  AND LIMESTONES IN NAGALAND

Sl No

Block Name

District

UNFC Stage

Drilling in Meter

Area in Sq. Km       (G1, G2, G3, G4)

Categories
of
Resources (MT)

Total Resources (MT)

Grade %

  A. MAGNETITE

1

Phokpur Magnetite -South Block (I) & North Block (II) 

Kiphire

G2

3299.55

0.4 (G2)

5.087 (332)

5.087

Fe. 45-50
Ni. 0.5-0.8
Cr: 2.39-2.94
Co. 0.033-0.04

2

Phokpur Magnetite Block III &  Thong Sanyu Magnetite Block IV

Kiphire

G4

Nil

0.656 (G4)

2.36 (334)

2.36

Same as above

3

Phor Magnetite

Phek

G4

Nil

0.03 (G4)

0.945 (334)

0.945

 

4

Thewati Magnetite Block

Phek

G4

Nil

0.314 (G4)

4.52 (334)

4.52

Average       

Fe. 47.21
Ni. 0.64
Cr: 1.2
Co. 0.058
Ti. 0.194
V.  0.017

5

Reguri Magnetite

Phek

G4

Nil

0.05 (G4)

0.86 (334)

0.86

Average      

Fe. 47.21
Ni. 0.64
Cr: 1.2
Co. 0.058
Ti. 0.194
V.  0.017

   B. LIMESTONE

6

Wazeho Limestone Block

Phek

G1 & G3

645.45

0.5 (G1&G2)

3.1 (111) 
0.1 (122)

3.2

SiO2 – 2.74%
CaO – 52.89%
MgO – 0.61%
R2O3 – 2.7%
LOI – 44.19%

7

Longpotrop Limestone Block

Kiphire

G2, G3 & G4

575.3

0.45 (G2&G3)                       0.05 (G4)

5.40 (322)
8.10 (323)
0.675 (334)

14.175

SiO2 – 1.67%
CaO – 52.25%
MgO – 1.48%
Fe2O3 – 0.61%
Al2O3- 0.55%
LOI – 42.66%
SO3 – 0.15%
P2O5 – 0.08%

8

Mimi-Pyakatsu

Kiphire

G2, G3 & G4

531.5

0.88 (G2&G3)                       3.62 (G4)

25.9 (332)
16.36 (333)
125.52 (334)

167.77

SiO2 – 1.11%
CaO – 55.93%
MgO – 0.39%
Fe2O3 – 0.39%
Al2O3 – 0.28%
LOI – 42.40%

9

Moke Limestone Block

Phek

G1, G2 & G4

350.25

0.013 (G1&G2)        2.487 (G4)

0.693 (331)
1.02 (332)
4.237 (334)

5.95

SiO2: (0.34 – 1.11)%
CaO: (46.2 – 53.90)%
MgO: (0.80 – 3.80)%
Fe2O3: (0.16 – 1.40)%
Al2O3: (0.16 – 1.13)%   
LOI: (38.63 -3.10)%

10

Mimi-Kheti Limestone Block

Kiphire

G4

Nil

0.83 (G4)

19.073 (334)

19.073

Similar to Mimi-    Pyakatsu Block
(Sl. No. 7)

11

Khongka Limestone Block

Kiphire

G4

Nil

5 (G4)

Under preliminary studies

Under preliminary studies

Similar  to Mimi-    Pyakatsu Block
(Sl. No. 7)

12

Thong Sanyu Limestone Block

Kiphire

G4

Nil

1 (G4)

48.6 (334)

48.6

CaO: (37.5- 50.96)%  
MgO: (0.40 – 1.20)% 
R2O3: (0.38 – 0.97)%   Insolubles:
(6.74 – 13.50)%

13

Salumi Limestone Block

Kiphire

G2

Nil

0.45 (G2)

0.99 (332) 5.55 (333)  1.05 (334)

7.59

i. Cement grade:
CaO 48.63 %
MgO 0.75 %
Fe2O3 0.75 %
SiO2 3.31
Al2O3 0.48 %
LOI 40.56 %

ii. Siliceous limestone:
CaO 33.97 %
MgO 1.31 %
Fe2O3 2.45 %
SiO2 28.35 %
Al2O3 2.90 %
LOI 28.20 %

14

Kamku Limestone Block

Kiphire

G4

Nil

0.4 (G4)

9.11 (334)

9.11

SiO2:(0.8 – 2.50)%           
CaO:(48.0 – 53.00)% 
MgO:(0.10 – 2.75)% 
R2O3:(0.10 – 2.50)% 

15

Chiphur Limestone Block

Tuensang

G4

Nil

0.4 (G4)

1.68 (334)

1.68

CaO: (45.36- 55.16)% 
MgO: (0.40 – 1.20)% 
R2O3: (0.17 – 3.48)%   Insolubles:
(0.34 – 11.43)%

16

Satuza Limestone Block

Phek

G4

Nil

5 (G4)

5.5 (334)

5.5

SiO2: (0.2 – 3.80)% 
CaO: (49.5 – 55.01)% 
MgO: (0.38 – 3.0)% 
R2O3: (0.10 – 0.56)% 

17

Phokungri Limestone Block

Phek

G4

Nil

0.5 (G4)

3.3 (334)

3.3

SiO2: (0.2 – 3.00)% 
CaO: (49.5 – 55.01)% 
MgO: (0..40 – 3.8)% 
R2O3: (0.10 – 0.56)% 

18

Mollen Limestone Block

Phek

G4

Nil

0.34

9.5 (334)

9.5

CaO – >50%

*

UNFC OF MINERAL RESOURCES (three digit code based system): Economic viability axis – 1st digit; Feasibility axis -2nd digit, & Geologic axis -3rd digit. All axes have three categories with codes 1,2 and 3 in decreasing order except geological axis having 4 codes i.e. 1 (detailed exploration), 2 (general exploration), 3 (prospecting) and 4 (reconnaissance). Highest category of resources, the code – (111); Lowest category code – (334).
Total Mineral Resource – (i) Measured Mineral Resource (331) – high level of confidence i.e. based on detailed exploration; (ii)Indicated Mineral Resource (332) – reasonable level of confidence based on exploration; (iii)Inferred Mineral Resource (333) – low level of confidence inferred from geological evidence, & (iv) Reconnaissance Mineral Resource (334) – Estimates based on regional geological studies, mapping, airborne and indirect Methods, field inspections preliminary, geological inference and extrapolation.
Mineral Reserve –(i) Proved Mineral Reserves (111) – Economically mineable part of Measured Mineral Resource; (ii)Probable Mineral Reserves (121 & 122) – Economically mineable part of indicated mineral resource.