 | | Journal (issue) | | TSKnerals of i'eru ! Indian miner, Cerro de Pasco, Peru, 1869 (Simonin, 1869). J3E(mes and J3E(merals...crystal group, 7 cm, from the Huanzala mine, Dos de Mayo Province, Peru. Marty Zinn collection; Jeff Scovil............................... History of Peru Mining in Peru The Mineral Specimen Business C o l l e c....................... Quiruvilca district, Santiago de Chuco province, department of La Libertad PASTO.......................... Pasto Bueno district, Pallasca province, department of Ancash R a u r a -H u |  | | Journal (article/letter/editorial) | | Metal Ratiosof the Quiruvilca Mining District, Northern Peru PAULJ. BARTOS ASARCOInc., RockyMountai...generate too muchnoiseto discernsignificantpatterns. District-scale metalratiosof basemetallodedepositsshowconsiderable...Thisstudydealswiththe southern partof theQuiruvilcabasemetallode district(Coco-LuzAngelica area),whichis locatedapproximately...locatedapproximately 80 km eastof Trujillo in north-central Peru (Fig. 1). Detailsof the districtandregionalgeologyare...district.Since1789, over elevenmil- lion tonsof Cu-Pb-Zn-Agvein ore havebeen pro0361-0128/90/1142/1629-1653 |  | | Journal (article/letter/editorial) | | properties of tetrahedrite-tennantites: constraints on the interdependenceof the Ag*Cu, Fe*Zn, Cu*Fe, and As*Sb...theoretical analysis suggest that, energetically, tetrahedrite-tennantite sulfosalts are remarkably well behaved... Fe-Zn exchange experiments (500"C) between tetrahedrite-tennantite and sphalerites yield values of 2... These results, plus petrologic studies of tetrahedrite-tennantite + sphalerite assemblages,and preliminary...two reciprocal reactions of "ideal" tetrahedrite-tennantite ((Ag,Cu)uCun(Fe,Zn), (As,Sb)nSt.): CuroFerSbnSr |  | | Journal (article/letter/editorial) | | 719 COPPER-EXCESS STANNOIDITE AND TENNANTITE-TETRAHEDRITE AS PROXIES FOR HYDROTHERMAL FLUID EVOLUTION...IN A ZONED CORDILLERAN BASE METAL DISTRICT, MOROCOCHA, CENTRAL PERU Honza CATCHPOLE§ Earth and Environmental...polymetallic mineralization in the Morococha district, central Peru, displays a deposit-scale base metal zonation...type. The distinct pattern of zonation consists of Cu-rich ores in the core area and increasingly Zn-,...Cu10Fe4Sn(As,Sb) S16, and tennantite-tetrahedrite have variable Cu content and Fe2+/Fe3+ values between |  | | Journal (article/letter/editorial) | | Original Article rge_133 218..233 Ag-rich Tetrahedrite in the El Zancudo Deposit, Colombia: Occurrence...Abstract Chemical compositions of tetrahedrite—Ag-rich tetrahedrite—freibergite solid solutions (Ag-rich...Ag-rich tetrahedritess. The Zn/(Zn + Fe)-, Ag/(Ag + Cu)- and Sb/(Sb + As + Bi)-atomic ratios exhibit some...veins. Ag-rich tetrahedritess with higher Ag/(Ag + Cu) ratios coexist with diaphorite, whereas those with...tetrahedritess + bournonite + galena shows no Zn ↔ Fe and Cu ↔ Ag variations between core and rim, respectively |  | | Book (edition) | | SphaJerite. xx 12 mm, Morococha, Peru, H Gypsum, xx 40 mm, Las Salinas, Peru, H Variscite, xx 5 mm, Iturnbiara...Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit.u.o. Stefanikova43...serve as a good example: tetrahedrite Cu 12[S(SbS 3).d Cu-rich freibergite (Ag,Cu) 12[S(SbS 3)4] Ag-rich...Ag-rich tetrahedrite [Cu,Ag) 12[S(SbS3).d freibergite AgdS(SbS3)-1l Remark: both minerals always contain...expressed in abbreviations: Rep. (republic), prov. (province), co. (county), munic. (municipio), pref. (prefecture) |  | | Journal (issue) | | ecord Articles Rare sulfosalts from the Van Silver mine, British C olum bia...............................Balacko Famous mineral localities: The Brownley Hill mine, Alston Moor, Cumbria, England....................ATACAMITE in GYPSUM, 6.8 cm, from the Lily mine, lea, Peru. Irv Brown collection; Jeff Scovil photo. ...British Columbia the Silver Tunnel o f the Van Silver mine has produced hundreds o f rare and beautiful crystal...were first observed in Canada at the Van Silver mine, and it is the second reported occurrence in Canada |  | | Journal (issue) | | on p. 79 Articles Native gold from the Jamestown mine, Tuolumne County, California......................Baranda Some pegmatite minerals from the Zomba district, Malawi ........................................visiting the Blanchard mine or other mines in the Hansonburg mining district near Bingham, New Mexico...signed in at Bingham for entry to the Blanchard mine area for surface collecting. Underground collecting...strictly prohibited due to the hazardous nature of the mine workings, and visitors are required to acknowledge |  | | Journal (issue) | | Cairncross & C. R. Anhaeusser Minerals of the Linwood mine, Scott County, Iowa ............. 231 by P. L. Garvin...in the still open underground workings of the Gem mine. He encountered an open pocket containing well formed...conglomerate. The stories of these early discoveries and mine developments, some of which were conducted under...,,.•• MINE r •• •• ' ··, . TRANSVAAL e e e \ . ...Location of gold deposits in the Transvaal Province. The Eersteling mine was the first deposit to be seriously |  | | Book (edition) | | Morocco; (center, left) wulfenite, San Francisco mine, Sonora, Mexico; (center) ameihyst, Veracruz, Mexico;...rnodochrosite, N’Chwaning mine, South Africa; (lower left, center) wulfenite, Red Cloud mine, Arizona; (lower...Pe Wr * se vat © C6 tad GAa Snive Sr Certain Mine (ax agry wh Oe ee — SS 4 eae wid Bharce ©...ye ty a ara id (ean ® “1 le hI AAP : oo A Mine seh Ranier “i i : lever vei ekealps ; cet ...coating fractures in sandstone at the Fuemrol No. 2 mine, Temple Mountain, Emery County, Utah; also sparsely |  | | Journal (issue) | | Zeolites and associated minerals from the Palabora mine, Transvaal........................................& R. S. W. Braithwaite The Lake George antimony mine, New Brunswick ..................... 263 by W. E...in g m ine, Kalahari m an g an ese field, C ape Province, South Africa. (See th e article in this issue...July-A ugust, 1991 in the collection from a specific mine, state or country, or all the gem beryls over 20...associated minerals have been found. LOCATION Palabora mine* is located some 550 km from Johannesburg, in the |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | British Columbia NF Labrador (part of Newfoundland Province) MB Manitoba NB New Brunswick NF Newfoundland...Space Group Gold Silver Copper Lead Aluminum Au Ag Cu Pb Fm3m Fm3m Fm3m Fm3m Al Fm3m a D 4.079-....substitution by Ag, or to orange-red with substitution by Cu; metallic luster. No cleavage, hackly fracture, very...the mineral is commonly termed electrum. Up to 20% Cu, 20% Hg, 10% Pd, and minor Bi have been recorded...Spotsylvania Co., and Partridge mine, Orange Co., VA, and at Dahlonega, GA; Homestake mine, Lawrence Co., SD; Silver |
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