 | Kistler, Ronald Wayne, Speed, Robert C. (2000) 40Ar/39Ar, K-Ar, Rb-Sr whole-rock and mineral ages, chemical composition, strontium, oxygen and hydrogen isotopic systematics of Jurassic Humboldt Lopolith and Permian (?) and Triassic Koipato Group rocks, Pershing and Churchill Counties, Nevada. Open-File Report 2000-217. US Geological Survey doi:10.3133/ofr00217 | Report (issue) | | Jurassic Humboldt Lopolith and Permian(?) and Triassic Koipato Group rocks, Pershing and Churchill Counties...Counties, Nevada By R. W. Kistler 1 and R. C. Speed2 Open-File Report 00-217 2000 This report is preliminary...AND STRONTIUM ISOTOPIC COMPOSITION OF THE HUMBOLDT LOPOLITH.............................................hornblende from gabbro specimen JD379 in the Humboldt lopolith.............................................whole-rock and mineral specimens from the Humboldt lopolith.......................................... |  | | Journal (article/letter/editorial) | | Origin of Marialitic Scapolite in the Humboldt Lopolith, N.W. Nevada David A. Vanko* and Finley C. Bishop...60201, USA Abstract. The occurrence and origin of marialitic scapolite in the Humboldt lopolith was investigated...dikes;and as a fracture-filling mineral with analcime, albite and sphene in scapolite veins. Additional secondary...mid-Jurassic Humboldt lopolith is a 1,700-2,500 cubic kilometer igneous complex in northwestern Nevada (Speed...(Speed 1976). Various aspects of the lopolith, including its field relations, mode of emplacement, primary |  | | Journal (article/letter/editorial) | | copper-gold - style mineralization in the humboldt mafic complex, nevada, usa Theodore A. DeMatties PII: DOI: Reference:...copper-gold - style mineralization in the humboldt mafic complex, nevada, usa, Ore Geology Reviews (2017), doi:...STYLE MINERALIZATION 4 IN THE 5 HUMBOLDT MAFIC COMPLEX, NEVADA, USA 6 7 Theodore A. DeMatties 8 34898...34898 University Ave., Cambridge, Minnesota 55008, USA 9 Email: tdematties@aol.com 10 11 Phone No. 011-763-232-8281...(170Ma) Humboldt mafic complex (HMC) and associated Boyer Ranch Formation of west-central Nevada, USA. This |  | | Journal (article/letter/editorial) | | Copyright © 2000 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/00 $20.00 ⫹ .00 Pergamon...Department of Geosciences, Tucson, Arizona 85721, USA (Received November 26, 1997; accepted in revised...to ⫹6.2). At the mid-Jurassic Humboldt mafic complex in western Nevada, Nd for Fe-P-REE (apatite) mineralization...⫹3.5). In the nearby Cortez Mountains in central Nevada, mid-Jurassic felsic volcanic and plutonic rocks...developed and well exposed in the Humboldt mafic complex of western Nevada and the Cortez Mountains felsic |  | | Journal (article/letter/editorial) | | Evolution at the Dixie Comstock Mine, Churchill County, Nevada PETER G. VIKRE ASARCOIncorporated,510...Abstract Gold ore at the Dixie Comstockmine, Churchill County,Nevada,is composedof quartz breccia,quartzstockwork...andminorfaultgouge.The ore zone formsa mullionwithin a range-bounding normalfault,the Dixie Comstockminefault...of the Stillwater Range, Churchill County,Nevada,about 110 mi eastof Reno (Fig. 1). The range margin...margin, which separatesthe Stillwater Rangeto the west from Dixie Valley to the east, is sharplycurvilinear |  | | Report (issue) | | MINERAL DEPOSITS OF THE RENO 1° x 2° QUADRANGLE, NEVADA, with a comprehensive bibliography by Gary R...mining districts in the Reno 1° x 2° quadrangle, Nevada........................................ 18 Tables...mining districts in the Reno 1° x 2° quadrangle, Nevada.................................. Occurrences of...mining districts of the Reno 1° x 2° quadrangle, Nevada......................... Mines, prospects, and...and claims in the Reno 1° x 2° quadrangle, Nevada.......................................... 19 21 22 INTRODUCTION |  | | Journal (article/letter/editorial) | | Cl-rich scapolite is presumably stable over a wide range of pressure and temperature, little is known about...were investigated. (1) The anhydrous reaction of albite + halite to form marialite [3NaAlSi3O8 + NaCl =...vessels. The temperature and pressure conditions range from 700–1050 °C and 0.5–2.0 GPa, respectively....synthetic phases including end-member marialite, high-albite, and halite. For reaction 1, marialite was found...to be stable above 920 to 990 °C over a pressure range of 0.65 to 2.0 GPa, but unstable between 800 and |  | | Report (volume) | | Mineral Resources of the Reno 1 o by 2° Quadrangle, Nevada and California U.S. GEOLOGICAL SURVEY BULLETIN...Mineral Resources of the Reno 1 o by 2° Quadrangle, Nevada and California By DAVID A. JOHN, JOHN H. STEWART...mineral resources of the Reno 1o by 2° quadrangle, Nevada and California I by David A. John ... [et al.]...resources-Nevada-Reno Region. 2. Mines and mineral resources-California. 3. Geology-Nevada-Reno Region...zinc-lead skarn deposits 38 Deposits related to the Humboldt complex 38 Other deposits 39 Simple antimony deposits |  | | Journal (article/letter/editorial) | | In addition to aplitic rocks, there are zones of albite–magnetite–quartz rock, which display a variety...Canada (Hildebrand, 1986); the 160 Ma Humboldt lopolith, Nevada (Vanko and Bishop, 1982); the 100 Ma...Ma intrusions of the Iron Springs district, Utah, USA (Barker, 1995). The Eastern fold belt of the Proterozoic...composed of I-type, magnetite-series granitoids which range in composition from diorite to alkali-feldspar granite...between drill holes (Fig. 5). The minor intrusions range from a few millimetres to a few metres in width |  | | Journal (article/letter/editorial) | | Experiments were conducted with synthetic phases over the range of 500–1030 °C and 0.4–2.0 GPa. For reaction 1,...and is reported extensively in nature over a wide range of solid solution. The general formula of scapolite...approximate range of plagioclase-equivalent (= EqAn) compositions of EqAn15–EqAn75, even though albite+halite...plagioclase+calcite at 750 °C and 0.4 GPa over the range of plagioclase compositions Ab47An53 to Ab17An83...relative to plagioclase+NaCl+CaCO3 over the widest range of scapolite compositions reported (EqAn25– EqAn89) |  | | Journal (article/letter/editorial) | | magmatic mineral. Analcime II forms by alteration of albite lamellae in perthite replaced by scapolite, M...product of feldspar. In the Humboldt gabbro lopolith of Nevada, CR USA (Vanko and Bishop, 1982), the...basinmargin inversion. Riebeckite alteration and albite veins date from ~355 Ma, secondary biotite from...minerals along with minor late magmatic analcime and albite, both of which may AC occur interstitially, although...crystals of analcime intergrown with K-feldspar and albite, are seen (Fig. 5B). Large crystals of magmatic |  | | Journal (article/letter/editorial) | | Xenoliths of the gabbro are common in the syenite, at a range of scales, and some appear partly digested (Fig...minerals include analcime I (late magmatic) and albite, generally interstitial but locally with larger...and 4D), with analcime II probably replacing the albite in perthite. The large rutile-titanitemagnetite...Scp, Ttn, Zrn Notes: Mineral abbreviations: Ab = albite, Anl = analcime, Cal = calcite, Chl = chlorite...forms interlocking crystals with K-feldspar and albite. Spot a = analcime II fills a fracture in K-feldspar |  | OLIVER, N. H. S., RAWLING, T. J., CARTWRIGHT, I., PEARSON, P. J. (1994) High-Temperature Fluid-Rock Interaction and Scapolitization in an Extension-Related Hydrothermal System, Mary Kathleen, Australia. Journal of Petrology, 35 (6) 1455-1491 doi:10.1093/petrology/35.6.1455 | Journal (article/letter/editorial) | | involving scapolitization in dolerite, formation of albite-scapolite shear zones in granite, exo- and endoskarn...<518O values of most alteration products are in the range 7-12%, reflecting a predominance of oxygen derived...Proterozoic of northern Australia, and can produce a range of features that are easily misinterpreted. Most...later haematite-albite alteration associated with large faults (e.g., Fountain Range Fault, Fig. 1)....metamorphism recorded within and around the granites range from 520 to 700 °C, at pressures of 1-2 kbar (Oliver |  | Jiang, Shao-Yong, Palmer, M. R., Xue, Chun-Ji, Li, Yan-He (1994) Halogen-rich scapolite-biotite rocks from the Tongmugou Pb-Zn deposit, Qinling, northwestern China: implications for the ore-forming processes. Mineralogical Magazine, 58 (393) 543-552 doi:10.1180/minmag.1994.058.393.02 | Journal (article/letter/editorial) | | psammopelitic slate, siltslate interbedded with albite-bearing rock, siliceous rock and scapolitebiotite...scapolite-biotiterock ~ sulfideorebody albite-bearingrock Baritebed ~ albite/siliceousrock FIG. 2. Schematic...Fe203 (Fe), olivine (Mg), MnO (Mn), CaSiO3 (Ca), albite (Na), adularia (K), MgF2 (F) and a pantelerite...-8.8%0 (Jiang et al., 1993), which is within the range reported for tourmalines from massive sulphide deposits...origin of marialitic scapolite in the Humboldt Lopolith, N.W. Nevada. Contrib. Mineral. Petrol., 81, 277-89 |  | | Report (issue) | | MINERALS OF NEVADA MINERALS OF NEVADA Peer Hen By CASTOR oan eGORY.C.oFER DOCK NEVADA AND BUREAU... UNIVERSITY Reno & Las Vegas OF NEVADA PRESS GEOLOGY Nevada Bureau of Mines and Geology Special...University of Nevada Press, Reno, Nevada 89557 USA Copyright © 2004 by University of Nevada Press Photographs...Districts and significant mineral occurrences of Nevada by Nevada Bureau of Mines and Geology All rights reserved...Cataloging-in-Publication Data Castor, Stephen B, Minerals of Nevada / Stephen B. Castor and Gregory C. Ferdock.— Ist |  | | Journal (article/letter/editorial) | | Copyright 0 1997 Elsevier Science Ltd Printed in the USA. All tights reserved 0016.7037/97$17.00 + .OO Pergamon...10024, USA ‘Department of Geological Sciences, University of Oregon, Eugene, Oregon 97403, USA (Received...microanalysis, the natural scapolite samples exhibit a range of compositions from XEqAn= 0.22, Xc, = 0.86 to...was calculated for the equilibrium: 2 anorthite + albite + calcite = C03-scapolite Solution modelling based...analysis since previous studies indicated a wide range in Cl contents of the scapolite (Hietanen, 1967; | | | Report (issue) | | MINERALS OF NEVADA MINERALS OF NEVADA STEPHEN B. CASTOR and G R EGOR Y C . F E R D OC K l NEVADA BUREAU...association with the UNIVERSITY OF NEVADA PRESS Reno & Las Vegas Nevada Bureau of Mines and Geology Special...University of Nevada Press, Reno, Nevada 89557 USA Copyright© 2004 by Uni versity of Nevada Press Photographs...Districts and si gnificant minernl occurrences of Nevada by Nevada Bureau of Mines and Geology All rights reserved...-Publ ication Dat,i Castor, Stephen B. Minerals of Nevada/ Stephen B. Castor and Gregory C. Ferdock.- rst |  | Doebrich, Jeff L., Albino, G.V., Barker, C.E., Duffield, W.A., Dunn, V.C., Hanna, W.F., McFarlan, J.P., McGuire, D.J., Miller, M.S., Peters, S.G., Plouff, Donald, Raines, G.L., Sawatasky, D.L., Spanski, G.T. (1994) Resource assessment of the Bureau of Land Management's Winnemucca District and Surprise Resource Area, Northwest Nevada and Northeast California. Open-File Report Vol. 1994 (94-712) US Geological Survey doi:10.3133/ofr94712 | Report (issue) | | DISTRICT AND SURPRISE RESOURCE AREA, NORTHWEST NEVADA AND NORTHEAST CALIFORNIA An Interim Project Status...Field Office, Mackay School of Mines, University of Nevada, Reno, NV 89557-0047 2U.S. Geological Survey, Unit...an area covering 13.5 million acres in northwest Nevada and northeast California. This resource assessment...basin groundwater resources (for example, the Humboldt River drainage basin). Primary objectives of this...activities have included working with personnel of the Nevada Bureau of Mines and Geology who are currently reassessing |  | | Journal (article/letter/editorial) | | pressure stage. Albite-rich plagioclase was formed when the rocks crossed the albite stability curve...(between 10 and 5 kbar, near 600~ No reaction with albite is observed, and the scapolite formed from biotite...eclogitic relicts are best preserved, and estimates range between 11 16 kbar/600-640~ (Vissers 1982; G6mez-Pugnaire...matrix composed dominantly of biotite with small albite-rich plagioclase, plag, (outlined in the left scapolite... 1981) synthetic materials as standards (Na = albite; K = orthoclase; Ca and Si = wollastonite; A1 = |  | | Journal (article/letter/editorial) | | the presence of saline ¯uids with XNaCl in the range 0.15±0.27. The marbles and calcsilicates bear biotite...Log(fH2 O /fHCl) derived from biotite covers the range 0.5± 2.6 in all rock types. Within a single sample...composition and the evolution of ¯uids under a wide range of crustal conditions during magmatism as well as...smaller one in the northern part of the A.-v.-Humboldt Mountains (Fig. 1). The calcsilicates and marbles...several metres thick and at some localities (e.g. NW Humboldt Mountains) they can be traced for more than a |  | Oliver, Nicholas H. S., Cleverley, James S., Mark, Geordie, Pollard, Peter J., Fu, Bin, Marshall, Lucas J., Rubenach, Michael J., Williams, Patrick J., Baker, Timothy (2004) Modeling the Role of Sodic Alteration in the Genesis of Iron Oxide-Copper-Gold Deposits, Eastern Mount Isa Block, Australia. Economic Geology, 99 (6) 1145-1176 doi:10.2113/gsecongeo.99.6.1145 | Journal (article/letter/editorial) | | more complicated reactor-style algorithms used a range of input fluids (from fluids equilibrated fluid...relatively small shifts away from the K-feldspar-albite equilibrium curve, and even isothermal model fluids...realistic alteration assemblages, dominated by albite, for both isothermal conditions and decreasing...formation remains uncertain. Alteration of rocks toward albite-rich compositions (albitization) may occur as a...dependence of the stability of albite relative to potassic minerals. Albite-rich rocks in continental rifts |  | Dumańska-Słowik, Magdalena, Powolny, Tomasz, Khac, Giang Nguyen, Heflik, Wiesław, Sikorska-Jaworowska, Magdalena (2020) Petrogenesis of scapolite-rich gabbro from the alkaline Cho Don complex in north-eastern Vietnam - mineralogical and geochemical implications. Lithos, 374. 105703pp. doi:10.1016/j.lithos.2020.105703 | Journal (article/letter/editorial) | | have shown that scapolite is stable over a wide range of pressure and temperature conditions. This may...BX51 polarizing microscope with a magnification range from 40 to 400 times. The photomicrographs were...were as follow: albite - Na (Kα, TAPH, 0.075), albite - Al (Kα, TAPH, 0.176), albite - Si (Kα, TAP, 0...were as follow: albite - Na (Kα, TAPH, 0.026), albite - Al (Kα, TAPH, 0.047), albite - Si (Kα, TAP, 0...brown-luminescent scapolite also comprises a broad band in the range 400–600 nm, with a maximum emission line at 500 |  | Li, Xiao-Chun, Zhou, Mei-Fu, Williams-Jones, A. E., Yang, Yue-Heng, Gao, Jian-Feng (2019) Timing and genesis of Cu–(Au) mineralization in the Khetri Copper Belt, northwestern India: constraints from in situ U–Pb ages and Sm–Nd isotopes of monazite-(Ce) Mineralium Deposita, 54 (4) 553-568 doi:10.1007/s00126-018-0823-3 | Journal (article/letter/editorial) | | Cu–(Au) deposits in the KCB fall within the age range of the regional Ca–Na metasomatism (~ 830 to ~ 850...show widespread calcsilicate alteration and/or albite-hematite alteration (Knight et al. 2002; Kaur et...scapolite, albite, and calcite, with subordinate epidote, apatite, titanite, and iron oxide. Albite–hematite...color of the rocks and included the formation of albite, hematite, amphibole, magnetite, and calcite. In...converted plagioclase and K-feldspar into nearly pure albite (Kaur et al. 2012, 2014). Structural setting of |  | Torresi, Ignacio, Xavier, Roberto Perez, Bortholoto, Diego F. A., Monteiro, Lena V. S. (2012) Hydrothermal alteration, fluid inclusions and stable isotope systematics of the Alvo 118 iron oxide–copper–gold deposit, Carajás Mineral Province (Brazil): Implications for ore genesis. Mineralium Deposita, 47 (3) 299-323 doi:10.1007/s00126-011-0373-4 | Journal (article/letter/editorial) | | ore zones: (1) poorly developed sodic alteration (albite and scapolite); (2) potassic alteration (biotite...0‰ to 7.5‰ at 277°C to 344°C) overlap the lower range for primary magmatic waters, but the more 18 O-depleted...were performed at the Krueger Geochron Laboratory (USA) using a conventional extraction line in which sulphide...fine-grained matrix of microcrystalline quartz, albite and K-feldspar indicating a dacitic composition...calcite and chalcopyrite. b Gabbro: 1 Pervasive albite–scapolite alteration replacing igneous plagioclase; |  | | Journal (article/letter/editorial) | | point of albite under a pure water pressure (0.5 GPa), the addition of CaCl2 solution to albite (i.e.,...2NaAlSi3O8 + CaCl2 = CaAl2Si2O8 + 2NaCl + 4SiO2 2Ab (albite) + CaCl2 (aq) (1) = An (anorthite) + 2NaCl (aq)...the activity coefficients in this concentration range (i.e., in relatively diluted solutions) is close...(6) Dujon and Lagache (1984) examined a wider range of salt concentrations at 400–800°C and 0.1–0.3...electron microprobe using andradite, wollastonite, and albite as standards. Selection of Analytical Techniques |
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