116 



GEOLOGY AND QUICKSILVER DEPOSITS, NEW ALMADEN DISTRICT, CALIFORNIA 



N 



LOWER NEW WORLD STOPE 



EXPLANATION 



-1051 



Intrusive contact. 

 showing eleva- 

 tion and dip 



D*sf>ed where pro- 

 jected, set/toped 

 on side of intru- 

 st** rock 

 .SO 



Strike and dip of beds 



>^ 



Stope 



Chevrons point 

 down incline at 

 5-foot vertical 

 intervals 



Inaccessible working 



50 

 I 



5O 

 I 



100 FEET 



Workings and geology by U S. 

 Geological Survey. 1945 



FIOURB 83. Map showing the localization of the New World stope ore body of the New Almaden mine beneath a plunging Inverted trough 

 on the surface of an intrusive sill. The shape of the Intrusive contact Is Indicated by structural contours drawn on its surface. 



NW 



EXPLANATION 



SE 



_2862N 



4563 W 



12OO' 



Contact 



Dished where 



Outline of stope 

 or level where 

 intersected by 

 plane of sec- 

 tion 



Fill or debris in 

 stope 



POWDER 



2661 N_ 

 5276 W~ 



1200' 



1100' 



1100' 



Workings and geology by US Geological Survey 



FicriRi 84. Cross section through the Giant Powder-Ponce slope area of the New Almndcn mine showing the localization of ore In an anti- 

 clinal warp on the upper surface of a sill of serpentine, which In here altered to silica-carbonate rock. 



