Base- and precious-metal concentrations of early Proterozoic massive sulfide deposits in Arizona :  crustal and thermochemical controls of ore deposition / 
 Early Proterozoic massive sulfide deposits in Arizona.  Base and precious metal concentrations of early Proterozoic massive sulfide deposits in Arizona. 
by Ed DeWitt. 
 - Washington :  Denver, CO :  U.S. G.P.O. ;  For sale by U.S. Geological Survey, Information Services,  1995. 
 - iii, 36 p. :  ill., maps ; 28 cm. 
 - U.S. Geological Survey bulletin ;  2138. .
 - U.S. Geological Survey bulletin ;  2138. .
<br/><br/> 'U.S. Department of the Interior, U.S. Geological Survey'--T.p. verso.  Shipping list no.: 96-0053-P. 
<br/><br/>Includes bibliographical references (p. 30-36) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ore deposits--Arizona.<br/>Sulphides--Arizona.<br/>Geology, Stratigraphic--Proterozoic.