FRANKLIN AND STERLING HILL NEW JERSEY: THE WORLD'S MOST MAGNIFICENT MINERAL DEPOSITS
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General relations

 

Minor and trace elements

 

Host minerals for the elements

 

Minor and trace elements

Few trace element studies have been completed. At Franklin, many of the trace elements are concentrated in the silicate assemblages; no such observations have been published for Sterling Hill. Frondel and Baum (1974) emphasized as minor elements: Ba, as hosted by micas and feldspars, chiefly hyalophane; and Pb, in feldspars and hardystonite. Additionally, they reported that the common trace elements in manganese oxides (Co, Ni, Cu, V, As, Sb, W, Pb, Be and B) are similar to those found in the Franklin calcium silicates. They found “that there is a close correspondence between the suite of minor and trace elements found in the Franklin and Sterling Hill deposits and the suite typical of marine and hot-spring deposits of manganese oxides.”

In general, minor elements of large atomic radius are hosted in the mica, apatite, and epidote groups of minerals; those of small and medium atomic radius are hosted by clinopyroxenes, amphiboles, and in special cases, by pharmacosiderite, vesuvianite, romeite, and minerals of the tourmaline group.

Below are noted some minor and trace element analyses of local minerals done by Dr. Jun Ito at Harvard University and on file there.

Willemite            

Minor elements:   Cu,As,Ge,Be,Mn,Ca,Al
Trace elements:    Fe,Pb,Ag,Bi,B,Cr,Ti,Mg,Ni

Hodgkinsonite        

Minor elements:   Fe,Ca,B,Mg
Trace elements:    Co,Ba,Al,Cu,Be

Hodgkinsonite        

Minor elements:   Mg
Trace elements:    Fe,Cr,Al,Ca,Ni,Be,Cu,V

Sonolite

Minor elements:   Al,Ca,Na
Trace elements:    Ti,Cr,Ba,Sr,B,Ni,Y,Cu,Be,Pb,Ag

Manganpyrosmalite

Minor elements:   Fe,Zn,Ca,Na,As,Al,Mg
Trace elements:    Sr,Ba,Ti,B,Ni,Y,Cu,Be,Ag,Pb

Leucophoenicite

Minor elements:   Mg,Fe
Trace elements:    Al,Ca,Cr,Ba,Sr,Ni,Y,Cu,Ag,Pb,Be

Tephroite

Minor elements:   Al,Ca,Fe
Trace elements:    Cr,Ba,Sr,As,Ni,Y,Cu,As,Pb,Be

 

 

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CHAPTER 10. GEOCHEMISTRY