scholarly journals Middle Devonian brachiopods, condonts, stratigraphy, and transgressive-regressive cycles, Pine Point area, south of Great Slave Lake, district of Mackenzie, Northwest Territories

1998 ◽  
Author(s):  
Keyword(s):  
Northwest Territories ◽  
Middle Devonian ◽  
Lake District ◽  
Great Slave Lake ◽  
Pine Point

DISCOVERY CASE HISTORY OF THE PYRAMID ORE BODIES PINE POINT, NORTHWEST TERRITORIES, CANADA

Geophysics ◽  
1968 ◽  
Vol 33 (4) ◽  
pp. 645-656 ◽  
Author(s):  
H. O. Seigel ◽  
H. L. Hill ◽  
J. G. Baird
Keyword(s):  
Northwest Territories ◽  
Time Domain ◽  
Case History ◽  
Middle Devonian ◽  
Electromagnetic Induction ◽  
Ore Bodies ◽  
Lead And Zinc ◽  
History Of ◽  
Pine Point ◽  
Devonian Age

In the fall of 1965 a geophysical exploration program, in the Pine Point area, Northwest Territories, Canada, revealed indications which led to the discovery of 11.2 million tons of ore grading 11.7 percent combined lead and zinc in two separate ore bodies. The ore bodies are relatively flat‐lying although irregular in plan and section. They lie in limestones and dolomites, some reefoidal, of Middle Devonian age and are generally conformable to these sea sediments. The basic discoveries were effected by a time‐domain, induced‐polarization survey. A subsequent gravity survey proved to be of considerable value in guiding the extensive drilling program which followed and in predicting the amount of ore to be expected in each body. Despite a high marcasite content, the ore bodies did not respond appreciably to electromagnetic induction methods. This is attributed to the mode of distribution of the various sulfide minerals in the deposits.

Fecundity Comparisons for Various Stocks of Lake Whitefish, Coregonus clupeaformis

1975 ◽  
Vol 32 (3) ◽  
pp. 404-407 ◽  
Author(s):  
M. C. Healey ◽  
C. W. Nicol
Keyword(s):  
Northwest Territories ◽  
Lake Erie ◽  
Fork Length ◽  
Nonlinear Relationship ◽  
Coregonus Clupeaformis ◽  
Lake Whitefish ◽  
Limited Data ◽  
Relative Fecundity ◽  
Great Slave Lake ◽  
The Relationship

We found no significant differences in slope or intercept for the regression of loge fecundity on loge fork length among samples of whitefish from four lakes near Yellowknife in the Northwest Territories. The equation describing the relationship between fecundity and fork length for these populations was:[Formula: see text]Five other populations for which length–fecundity relationships could be calculated had length exponents ranging from 3.20 to 4.38, suggesting a nonlinear relationship between weight and fecundity. Six of the nine populations as well as four others for which limited data were available all had similar relative fecundities. Fish from Buck Lake in Alberta and from Lake Erie had high relative fecundities while fish from Great Slave Lake had low relative fecundity.

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