MISCELLANEOUS FIELD STUDIES MAP MF- 900-B DEPARTMENT OF THE INTERIOR HILLSBORO AND SAN LORENZOQUADS.,N.M. UNITED ST A TES GEOLOGICAL SUR VEY SHEET20F2 MINERAL RESOURCE POTENTIAL MINERAL DEPOSITS OF THE HILLSBORO-SAN LORENZO QUADRANGLES Lode Name(s) Resource Type of Develop­ Brief description References Lode Name(s) Resource Type of Develop­ Brief description References Lode Name(s) Resource Type of Develop­ Brief description References OIL AND GAS [Numbers cortespond with location of lode mineral deposits on map. Leaders (---) in reference column indi,,ate No. deposit No. deposit ,o. deposit =" =" category-"' deposits not described in the literature and are chiefly occurrences observed during recent geologic mapping. category category There is no potential for oil and gas in the Hillsboro- San Lorenzo quadrangles. P, prospect pit; M/I, mine workings, inactive; M/A, mine workings, active; 0, mineralized outcrops, no devel­ Lake Valley district King.Heon diHt dct ( ! ! !)--Cont inue d Santa Rita (San Juan) district (VII) Numerous blocks faults in the relative thin Paleozoic sediroentsry section have probably opment] allowed the escape of any gas or petroleum that may have existed. 66. Unnamed------ Vein------- p Gossan along fault in limestone con­ 122. Blackie and Ag, Cu , ---do------- M/I Abundant mangano;se oxides as replace­ Farnham, l 961, 177. Unnamed------ Zn, Pb, Vein-------- p Sparse amounts of sulfide within Lode Name(s) Resource Type of Develop­ Brief description References COAL tains chiefly hematite and sparse Tall Pine Pb, Zn, ment bodies along N. 15° W. and N. p. 97, 101-102. Cu, Ag Fusselman Dolomite near fault ,,. deposit ment amounts of pyrite. mines. 60"-65° E. fractures and faults. contact with Perch a Shale. category No coal deposits are known within the Hillsboro and San Lorenzo quadrangle. 123. Unnamed------ Mo"" ---do------ M/I Minor amounts of manganese oxides 178, Rose mine---- Cu, Zn, ----do------ M/I Quartz veins along fault contact of along a fault that strikes N. 50°- Pb, Ag of the Lake Valley Limestone with Hillsboro district (I) ' GEOTHERMAL ENERGY Unknown 550 w. limestones of the Magdal,,na Group. 124. ----do------- Mn ---do------- M/I Abundant manganese oxides along a N. Fault strikes N. 85° E. and is Hot springs in the Warm Spring Canyon area east of Hillsboro are along the extension 1. Unnamed------ Ag, Au Vein-------- p Quartz vein along north-striking 6 7. Unnamed------ Co Vein------- p Chrysocolla along fault in andesite. 65° W. striking fault. brecciated. Abundant chrysocolla. of the Berrenda fault (NE l/4, sec, 5, T. 6. s., R. 7 W.), but the heat potential in this fault contains pyrite. 68. Blue Bell Co ----do------- p Chrysocolla along fault in andesite. 125. Comstock Ag, Cu, ---do------- M/I Oxidized silver-bearing base metal Harley, 1934, 179. !Innamed----- Cu, Zn, ---do------- Small gossan over a series of veins area is low. Hot springs also occur just south of the San Lorenzo quadrangle boundary 2. ----do------- Ag, Au, ---do------- p Quartz vein along north-striking No. 2. tunnel. Pb, Zn deposits a long a N. 45°-55° E. p. 104; Pb, Ag ' that strike N. s 0 w. Sparse near Mi.mbres Hot Springs (sec. 13, T. 18 S., R. 10 W., Dwyer quadrangle) and t he heat Pb, Zn fault contains pyrite and galena. striking fault. Farnham, 1961, amounts of sulfide present, potential in this area is high (Elston, 1957, P• 76, 77). 3. ----do------- Au,~. ---do------- p Quartz vein along tactitc zone p. 102-103. 180. ----do------ Cu, Zn, ---do------ " M/I Shaft in Percha Shale cuts weakly Tierra Blanca district (VI) Pb, Zn, parallel to fault that strikes 126. Unnamed------ Ag, Cu, Vein-------­ Thin gossan along fault. Pb, Ag mineralized Fusselman Dolomite at RADIOACTIVE MINERALS w N. 70° w.; minor sulfides . Pb, Zn depth. 4, ----do------- Pb, Zn, --do------- p Quartz vein along tactite zone; 69. Unnamed------ Cu Vein------- P Quartz veins about 3 m long contain 127. ----do------ Ag, Cu, --do------- M/I Weakly mineralized fractures within 181. ----do------- Cu, Zn, ---do------ Weakly mineralized Fusselman Dolomite An occurrence of autunito; was reported from tu££ beds along Hot Springs Canyon and Cu sparse sulfide. sparse amounts of pyrite and Pb, Zn dolomite near the contact with Pb, Ag ' near contact with Percha Shale. the maximum an001aly was about 0,07 eU3 08 (Foss Yates, oral commm., 1973). The exact 5. El Oro mine-- Au, Cu, ---do------- M/I Quartz vein within shear zone tha~ Harley, 1934, chalcopyrite. Percha Shale. Some sulfides in quartz veins along location of this anomaly was not found during subsequent field studies. Pb, Zn strikes N. 50° E,; mined to a P• 132, 141. 70. ----do------- Cu, Ag, Disseminated P Disseminated p yrite in rhyolite 128. Gypsy IV Ag, Cu, ---do----- M/I Highly brecciated dolomite with N. J(/1 E,-striking faults. depth of 500 ft (152 m); pyrite, Pb, Zn dike. group. Pb, Zn secondary vein filling of quart"z, 182. ----do------- Cu, Zn, ---do------- Quartz veins along N. 30° E. striking METALS chalcopyrite and free gold. 71. ----do------ Cu, Ag, ---do------- P Disseminated sulfides in rhyolite calcite and minor sulfides. Pb, Ag ' fractures in dololilite contain sparse 6. Unnamed------ Au, Cu, --do------ M/I Quartz vein along pyritized shear Pb, Zn dike. 129, Unnamed------ Ag, Cu, Vein and M/I Minor amounts of silver-bearing amounts of sulfide. Sil vet Pb, Zn zone in andesite strikes N. 6rP E. 72. ----do------- Cu, Ag, Vein------- P Sparse amounts of sulfide in sili­ Pb, Zn bedding sulfides at contact of Fusselman 183. ----do------- Cu, Zn, ---do------- M/I Minor amounts of sulfide f ill frac­ 7. Little Jewess Au, Cu, ---do------- M/ I Quartz veins along shear in andesite Harley, 1934, Pb, Zn cified fault that strikes N. 52° w. replacement. Dolomite with the Percha Shale. Pb, Ag tures and faults that strike N. The silver-beating base metal deposits ate of probable middle Tertiary age (about mine. Pb, Zn that is about l m thick; abundant P• 159. 73. ----do------- Cu ---do------- P Sparse amounts of pyrite along fault 130. -----do------- Ag, Cu, Vein------- M/I Minor amounts of base metal sul­ 10° w. 32-35 m.y. ago) and ate localized along majot notth-northwest-sttiking faults. Fissure pyrite, that strikes N. 85° w. Pb, Zn fides at contact of ~l Paso Lime­ 184. ----do------- Cu, Zn, ---do------ p Mineralized breccias at junction of veins and bedding-replacement deposits are most comlI>:ln in the Silurian Fusselman Dolomite 8. Unnamed------ Au, Cu, ---do------ Quartz vein along El Oro vein; vein 74. Silvertail Cu, Ag, Vein and bed- M/I Sparse amounts of pyrite within a Harley, 1934, stone with Bliss Sandstone. Pb, Ag two intersecting faults that with many replacement bodies localized in the dolomite at or near the contact with the Pb, Zn ' strikes N. 40°-45° E. and contains mine. Pb, Zn ding replace­ gangue of vuggy quartz and cal­ p. 108. 131. ----do------ Ag, Cu, --do------- Minor amounts of sulfide at contact strike. N. 15° w. and N. br:P W. overlying Devonian Percha Shale. In some areas the. mineralization is associated with a minor pyrite. ment. cite, Bedding replacement lenso;s Pb, Zn ' of Fusselman Do l omite with the 185. ----do------ Cu, Zn, --do------- p Small gossan along fault that strikes low-grade thermal metamorphism of the dolomite host rock along major faults. Talc, ,. Sweetwater Au, Gu, ---do------- M/I Quartz vein along shear that strikes Harley, 1934, in the Fusselman Dolomite near the Percha Shale.. Pb, Ag N. 20° w. Sparse amounts of pyrite serpen,tine, and tremolite are locally present in the highly fauJ.ted Kingston district and mine. Pb, Zn N. 75° E.; vein contalns abundant P• 159. contact with the Percha Shale. 132. Gypsy mine--- Ag, Cu, Vein and M/1 Abundant oxidized silver-bearing Harley, 1934, and sphal~rite are present. along extensions of the Pierce Canyon fault in the Tierra Blanca district. pyrite and aparse amounts of free 75. Unnamed------ Cu, Ag, Vein------ M/I Sparse amounts of sulfides along Pb, Zn bedding base metal sulfides along a fault p. 104. 186. ---do------- Cu, Zn, ---do------ Shaft in Percha Shale cuts minera­ At least 126 silver-bearing base metal deposits have been examined, of which about gold. Pb, Zn fault contact with andesite dike. replacement, that strikes N. 10° W. Past pro­ Pb, Ag ' lized Fusselman Dolomite at depth. 50 percent are localized in bedding repl a,,ement deposits and fissure veins within the 10. Unn11med------ Au, Cu, ---do------ Quartz vein along shear that strikes 76. ----do------ Cu, Ag, ---clo------ M/I Quartz veins a l ong faulted dolomite duction was about 200,000 oz silver. Fusselman Dolomite just below the contact with the Percha Shale. The most extensive vein Pb, Zn ' N. 80° w. Contains abundant pyrite. Pb, Zn beds; veins contain minor amounts 133. Unnamed------ Ag, Cu, Vein------- M/I Minor amounts of sulfide along N. and bedding replacement ocCurrence is in the Kingston district where an estimated 6 11. ---do------ Au, Cu, ---do------- P, M/I Quartz vein along fault that strikes of sulfide. Pb, Zn 70° E. striking fault in Precam- million oz (186,600 kg) of silver was mined between 1880 and 1893 (Thompson, 1965, P• Pb , Zn N. 85° w. Contains abundant pyrite. 77. -----do-------- Cu, Ag, ---do------ M/I Sparse amounts of pyrite along brian granite. 147). Veins along the Bllllion fault and within the Fusselman Dolomite have been mined 12. Homestake­ Au, Cu, ---do------ Quart& veins along Homestake-Tripp Harley, 1934, Pb, Zn fractures in dolomite. 134. Fabian mine-- Ag, Cu, ---do------- M/I Quart& vein along fault contact of over a length of 3,000 ft (915 m); some of the mines located along or near this fault Tripp mine.