 | | Report (issue) | | River 7.5 x 15-minute quadrangle, Windham and Windsor Counties, Vermont By Nicholas M. Ratcliffe1 and Thomas...medium-grained, weakly foliated to nonfoliated, biotite-muscovite and plagioclase-rich granite, commonly...carbonaceous, garnet-chlorite-plagioclase-quartz ± biotite ± epidote ± carbonate schist and phyllite. 1 to...muscovite-epidote-plagioclase-carbonate-chlorite± garnet± biotite calc-silicate rock DSwf I Felsic volcaniclastic...Purplish-gray to Hght-creamy-gray, 1- to 5-m-thick beds of biotite-chlorite-muscovite-quartz-plagioclase± carbonate |  | | Report (issue) | | geologic map of the Andover quadrangle, Windsor County,Vermont BY Nicholas M. Ratcliffe OPEN-FILE REPORT...incorporated in the Centennial Geologic Map of Vermont at 1:250,000 (Doll and others, 1961). More recent...Green Mountain massif. Recent studies in southern Vermont, however have indicated that these formations are...rocks, schists, calc-silicate rock, quartzites and biotite-quartz-plagioclase paragneiss that contains layers...and which contains abundant discrete flakes of biotite. Beds of typical feldspathic pinstripe granofels |  | | Report (issue) | | ..........................................106 Vermont .................................................Figures 1. Sketch cross-sections of typical "Vermont type" talc deposits, based on Waterbury and Barnes...Virginia, Maryland, Pennsylvania, Massachusetts, Vermont, and New York. Districts in California include...quarried for dimension stone. Talc deposits in Vermont are mostly located in a north-trending belt of...Carolina, Vermont, and New York. Localities for which production is reported are indicated by mine symbols |  | Taylor, Ryan D., Shah, Anjana K., Walsh, Gregory J., Taylor, Cliff D. (2019) Geochemistry and Geophysics of Iron Oxide-Apatite Deposits and Associated Waste Piles with Implications for Potential Rare Earth Element Resources from Ore and Historical Mine Waste in the Eastern Adirondack Highlands, New York, USA. Economic Geology, 114 (8) 1569-1598 doi:10.5382/econgeo.4689 | Journal (article/letter/editorial) | | Ore and Historical Mine Waste in the Eastern Adirondack Highlands, New York, USA Ryan D. Taylor,1,â Anjana...Florence Bascom Geoscience Center, Montpelier, Vermont 05602 Abstract The iron oxide-apatite (IOA) deposits...mined in the United States since the Mountain Pass mine, California, was put on care and maintenance at...boulder-sized clasts pulled from the mine and deposited near the mine openings, and tailings piles, which...Acquisitions user REE RESOURCES FROM MINE WASTE, EASTERN ADIRONDACK HIGHLANDS, USA 73°40â 73°30â A) Regional |  | | Book (volume) | | Extracts from a Diary Concerning Mining at the Dunton Mine, Newry, Maine ....................................Duane L. Leavitt The Bennett Pegmatite, Oxford County, Maine . ........................................permanent photographic exhibits in the northeastern USA. The Shaubs have been active in ornithological research...tourmalinebearing Himalaya pegmatite at Mesa Grande, San Diego County, California. Most recently, Gene was gratified...have provided esoteric knowledge, while many are mine operators who generously allowed access to their |  | | Report (issue) | | and Burns Spring Wilderness Study Areas, Mo have County, Arizona - f. - - - ' ' - ' -f 5* -----...and Burns Spring Wilderness Study Areas, Mohave County, Arizona By JAMES E. CONRAD, RANDALL H. HILL, and...and Burns Spring Wilderness Study Areas, Mohave County, Arizona / by James E. Conrad ... [et al.]. p....Spring (AZ-020-OlO) Wilderness Study Areas, Mohave County, Arizona. CONTENTS Summary 1 Abstract 1 Character...and Burns Spring Wilderness Study Areas, Mohave County, Arizona Contents FIGURES 1. Index map showing |  | | Journal (article/letter/editorial) | | because of preferred orientation of hornblende and biotite and rarely pyroxenes. Anhydrous variety of basic...either lacks hornblende/biotite or contains minor proportions of hornblende or biotite. 96 D.PRAKASH Fig...Orthopyroxene- Biotite - Plagioclase Quartz A-2 Clinopyroxene - Orthopyroxene- Hornblende - Biotite - Plagioclase...Clinopyroxene - Hornblende - Biotite - Plagioclase Quartz A-4 Orthopyroxene- Hornblende - Biotite k Plagioclase ?... Quartz A-5 Clinopyroxene - Biotite f Plagioclase k Perthite f Quartz A-6 Orthopyroxene- Clinopyroxene |  | | Journal (article/letter/editorial) | | Papike, Cameron, and Baldwin (1974), Viten and Hamm (1978), Spear and Kimball (1984), Dollase and Newman... 14.50 36.29 1.54 16.53 53.31 0.26 10.52 4 biotite 3 omphacite 2 enstatite 50.65 0.12 0.51 0...correspond well to the experimentally measured values. Biotite % The determination of the number of Fe+2 and...etc. Column 4 in Table 1 provides an example of biotite based on data of Dyar and Burns (1986) obtained...Geosciences, v. 10, no. 2/3, p. 317-325. Viten, K., and Hamm, H. M., 1978, On the calculation of the crystal |  | | Journal (article/letter/editorial) | | Augusta, El Dorado, and at mileage 3288.0âMarion County line was crossed; a mile further (3289.0) was the...the river but we did not stop. 3306.0 milesâChase County line on U.S. 50S. 567 3307.0 milesâCeder Point...right. 3446.0 milesâWe turn right for the N. R. Hamm limestone quarry which we saw before but never stopped...milesâWe turn right on U.S. 75. 3475.0 milesâJackson County line on U.S. 75. 3488.0 milesâIndian Reservation...visit. Among the minerals found in the pit are:â Biotite: small black flakes in gray granite pebble. Epidote: |  | ACKERMAND, D., HERD, R.K., REINHARDT, M., WINDLEY, B.F. (1987) Sapphirine parageneses from the Caraiba complex, Bahia, Brazil: the influence of Fe2+-Fe3+ distribution on the stability of sapphirine in natural assemblages. Journal of Metamorphic Geology, 5 (3) 323-339 doi:10.1111/j.1525-1314.1987.tb00388.x | Journal (article/letter/editorial) | | Ontario, Canada K I A OE8 M. REINHARDT, Caraiba Mine, Bahia, Brazil B.F. WINDLEY, Department of Geology...Orthopyroxene, cordierite, biotite, ,quartz, feldspar tonalitic to grandioritic gneiss; 11: Biotite, quartz, feldspar...clinopyroxene, hornblende, plagioclase meta-norite; IV: Biotite, orthopyroxene, quartz, feldspar, garnet, cordierite...magma and the copper mineralization of the Caraiba mine is associated with these rocks (Fig. 1, rock type...from the west side of the track between Caraiba mine and Esfomeado farm, west of Poco da Vaca farm (Fig |  | | Journal (article/letter/editorial) | | =rude sill =sillirnanite opx = orthopyroxene bi =biotite cpx = clinopyroxene .qu =quartz 1 . =melt t o m...in this paper to the area outlined on Fig. 2a. At Hamm Peak, Mt Caroline Mikkelsen, and Boyd, Vestknatten...coastal islands north of Mt Caroline Mikkelsen and Hamm Peak, metapelitic gneisses become the dominant rock...sillimanite-bearing rocks are generally free of primary biotite. The iron-rich, oxidized nature of the sediments...calculation w Tabk 3; sampk 794:orthopyroxenecordicritc-biotite @SS. Mineral Sample No. gt 864 37.97 gt 815 |  | | Journal (issue) | | ........................ 460 1HE SCARLET COPPER MINE, N. C. By C. Henry King ..........................Boulder Bec!ch on Lake Mead. Nevad~ The Clark County Gem Collectors, Inc. (Paul 0 . Drury, Publicity...barren calcite vein cutting Keewatin greenstone. Hamm. poinh to veia. ROCKS AND MINERALS 454 Ancient...future. I spent much of my time by myself combing the mine dumps in search of silver and other minerals. I...minerals in my pack. Incidentally this field pack of mine is an old and dependable friend. In Germany I carried |  | | Journal (article/letter/editorial) | | -itrgogOll dates of stratigritphicall~ linoun biotite-boitring i,uf%k,lava, fioxvs itn(l intrusions when...of such dates with a time-scale controlled by biotite dates. For glauconites that meet the required geologic...time-scale control data used are potassium-argon biotite dates obtained by us and others on stratigraphically...43 Glauconite Biotite Biotite Glauconite Biotite Biotite Glauconite Glauconite Biotite Sanidine Glauconite...Glauconit e Biotite Glauconite Glauconite Glauconite Glauconite Glauconite Glauconite Biotite Glauconite |  | | Report (issue) | | SURVEY Bulletin Number 53 TALC DEPOSITS OF MURRAY COUNTY, GEORGIA By A. S. FURCRON Assistant State Geologist...Survey Bulletin No. 53, "Talc Deposits of Murray County, Georgia," by Dr. A. S. Furcron, Assistant State...involved in the economics of the talc. Detailed mine maps have been correlated with surface and subsurface...-----------------------------------'TALC DEPOSITS OF MURRAY COUNTY -----------------------· Distribution of Deposits...----------------VariE:ltie.S of Talc in Murray County -------------------------------Uses ---------- |  | Papapavlou, Konstantinos, Darling, James R., Storey, Craig D., Lightfoot, Peter C., Moser, Desmond E., Lasalle, Stephanie (2017) Dating shear zones with plastically deformed titanite: New insights into the orogenic evolution of the Sudbury impact structure (Ontario, Canada) Precambrian Research, 291. 220-235 doi:10.1016/j.precamres.2017.01.007 | Journal (article/letter/editorial) | | camp, the Six Shaft Shear Zone from the Creighton Mine. Three growth stages of chemically and microstr...exposed mylonitic shear zone from the Creighton mine (Figure 1) that is spatially related with magmatic...titanite grains from the #4 shear zone of the Garson mine (Figure 1), indicates operation of the shear zone... K-Ar and 40Ar-39Ar dates from fabric-forming biotite and muscovite grains yielded ages related to a...Shear zone families in the Creighton mine (South Range) Creighton Mine is located at the southwestern margin |  | | Journal (article/letter/editorial) | | cordierite â biotite â plagioclase â perthite â quartz and garnet â orthopyroxene â cordierite â biotite â quartz...dierite-corundum-orthopyroxenepotash feldspar-biotite granulites displaying spectacular coronas and symplectites...granulites, cordierite-biotite-sillimanite gneisses (garnet), cordierite-orthopyroxene-biotite gneisses (garnet)...quartz-free sapphirine-spinel-cordierite-corundum-biotite-orthopyroxene-potash feldspar-bearing rocks, which...corroded biotite in cordierite & K-feldspar; (c) inclusions of sillimanite, corroded biotite within cordierite; |  | | Report (issue) | | block diagram of Paradox Valley anticline, Montrose County, Colo............................................Growing as these anticlines did in the rather weather mine roads and truck trails now traverses areas narrow...Precambrian complex are quartzite, hornblende and biotite gneisses, and schist. These occur sparsely in later...this Precambrian complex is a medium-grained gray biotite-hornblende granite that in most places has a distinct...Sinbad Valley, sec. 15, T. 49 N., R. 19 W., Mesa County, Colo. [Measured by E. M. Shoemaker and W. L. Newman] |  | | Journal (article/letter/editorial) | | Grandidierite occurs in the outer margin of a biotite-rich pelitic xenolith in norite close to the contact...(decreasing order): An55_51 plagioclase (65~), biotite (10~), spinel (10~o), cordierite (5~), corundum...grandidier/te (0.80-0.78) > cordierite (0.78) > biotite (c. 0.59) > spinel (0.35 0.27). The grandidierite...Auchedly granite, which contains orthoclase and biotite, and tourmaline crystals up to 30 cm long. The...the granite contact. The norite matrix is also biotite-rich. The grandidierite occurs inside the plagioclase-rich |  | | Report (volume) | | conglomerates In the Tallahassee Creek distrIct in Fremont County. Uranium, recoverable by solution mining of Upper...evaluated In Weld County. VBlntype uran I urn occurrence 5 are typ I fled in Je f farson County by the Schwartzwal...Schwartzwal der Mi ne, the largest uranium mine In Colorado. Part 2 contains in the bibliography of approximately...occurrences In the state, with cross-Indexes by county, host rock, and the special categoriesof "Front...numer I ca I I I st of occurrences by county OCCURRENCES by county with Introductions Adams Alamosa Arapanoe |  | Liu, Xiaochun, Zhao, Yue, Song, Biao, Liu, Jian, Cui, Jianjun (2009) SHRIMP UâPb zircon geochronology of high-grade rocks and charnockites from the eastern Amery Ice Shelf and southwestern Prydz Bay, East Antarctica: Constraints on Late Mesoproterozoic to Cambrian tectonothermal events related to supercontinent assembly. Gondwana Research, 16 (2) 342-361 doi:10.1016/j.gr.2009.02.003 | Journal (article/letter/editorial) | | 127-1 were collected from the Mistichelli Hills, Hamm Peak and Meknattane Nunataks of Munro Kerr Mountains...mineral assemblage is composed of orthopyroxene + biotite + plagioclase + K-feldspar + quartz + magnetiteâilmenite...two-stage growth for orthopyroxenes. In sample 32-1, biotite was partially replaced by chlorite, suggesting...hornblende +plagioclase+ magnetiteâilmenite, with minor biotite and quartz. Sample 23-24 was taken from a large...b3 cm long. The rock consists of orthopyroxene, biotite, plagioclase, K-feldspar, quartz and magnetiteâilmenite |  | | Journal (article/letter/editorial) | | , 1974; Cawthorn and Collerson, 1974; Viten and Hamm, 1978; Spear and Kimball, 1984; Droop, 1987; Schumacher...Computers & Geosciences 10 (23), 317±325. Viten, K., Hamm, H.M., 1978. On the calculation of the crystal chemical... 1998. Bioapag-PC: program for an apatite and biotite geothermometer. Computers & Geosciences 24 (9)...evaluating and plotting microprobe analyses of biotite from barren and mineralized magmatic suites. Computers |  | | Catalog/List | | mineral, "At were of large, prisms, of this mine have been obtained, more Note. - Galena offer...in the specimens Dundasite, bunches samples Mine, of occurs lode. beautiful white large more...originally Cornish mining ceeding by colour, Mine fractures of great the mineral often Mount ...extremely some rarely Anglesite. Embolite, back Mine. with minute of small of capping gossan the...Beryl, Soda or vitreous 44. Muscovite sion Biotite 45. dodecahedral or or with Black dull awl |  | | Journal (article/letter/editorial) | | Creek, CA, USA; bDepartment of Geological Sciences, Stanford University, Stanford, CA, USA; cCenter for... 1315 Alma Ave Ste 134, Walnut Creek, CA 94596, USA Paper for International Geology Review Special Issue...balance effectively recalculating to four cations (Hamm and Vieten 1971; Droop 1987) or allocating Fe3+...cores of rutile in titanite. Randomly oriented biotite flakes grew as the latest phase (Figure 5). The...titanite occurs as lens-shaped aggregates. Rare biotite contains cores of prograde chlorite. Small, randomly |  | | Journal (article/letter/editorial) | | area is surrounded to the north by migmatitic biotite gneisses of granitic composition and to the south...quartzofeldspathic types and sillimanite- and biotite-rich types. TABLE 1 Whole-rock analyses of metabasites...intergrowths while garnet is surrounded by small laths of biotite. Whole-rock Rb/Sr isochron data of garnet-leucocratic...* âą + - - + * + + + + -- - Quartz Biotite + + + , _ _ + * , * _ - + Opaques ...with the assumption of stoichiometry (Vieten and Hamm, !978). These clinopyroxenes can be termed salites |  | | Book (volume) | | 600 to 800 feet thick in the north. ALEXANDER COUNTY FAYVILLE, area stream gravelsâŻagate, jasper, rare...âŻagate, jasper; d RR siding of ClayâŻagate. CALHOUN COUNTY AREA, shores of the Mississippi R., in the Warsaw...crystals). CRAWFORD COUNTY PALESTINE, area depositsâŻSiderite. EDWARDS COUNTY AREA, T. 1 S, R. 10 E...depositsâŻSiderite. FULTON COUNTY FARMINGTON, W 6 mi. on Rte. 116 to the Rapatee No. 5 strip mineâŻpyritized gastropods...gastropods (Pennsylvanian age). GRUNDY COUNTY AREA: c Regional rd. and RR cuts and banks of Mason Cr.âŻfossils; |
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