 | | Journal (issue) | | Baranda Some pegmatite minerals from the Zomba district, Malawi .........................................all over the world converged on one geo graphic region for such an event. It changed the course of a nation...Mountain, was discovered by four men from the southern U.S. in 1858. While sinking a shaft in 1859, the...also occur: apatite, ilmenite, rutile, titanite, zircon and, in the serpentinite, chromite and magnetite...and HORTON, F. W. (1940) Mines of the southern Mother Lode Region; Part IIâTuolumne and Mariposa Counties |  | Merschat, Arthur J., Holm-Denoma, Christopher S., Levine, Jamie, McAleer, Ryan J., Southworth, Scott, Wilson, Crystal G. (2016) Geology of the Mount Rogers area, revisited, Blue Ridge, VAâNCâTN. Field Trip Guidebook. Carolina Geological Society | Report (issue) | | Geology of the Mount Rogers area, revisited, Blue Ridge, VAâNCâTN Carolina Geological Society Annual...Mountain across Grayson High- Geology of the Mount Rogers area, revisited, Blue Ridge, VAâNCâTN Carolina................1 Scott Southworth Geology of the Mount Rogers area, revisited: Evidence of Neoproterozoic...Analysis of Conglomerates in the Neoproterozoic Mount Rogers Formation, SW Virginia ....................Patrick Trout, Jason Yonts Linking the Central and Southern Appalachian Blue Ridge: What We Know and Donât |  | | Journal (article/letter/editorial) | | supercontinents, Rodinia and Pangea. In the southern and central Appalachian region, basement rocks were affected by...and eroded basement. This sequence, known as the Mount Rogers Formation (MRF), comprises a bimodal basaltârhyolite...the Blue Ridge province of the southern and central Appalachian region, rocks that record the Proterozoic...Anorogenic mafic and felsic volcanic s (includes Mount Rogers & Catoctin Fms.) Area intruded by Bakersville...and eroded basement. This sequence, known as the Mount Rogers Formation (Rankin, 1970, 1993), comprises |  | | Journal (issue) | | Krasny Chikoy, Transbaikalia, Eastern Siberian Region, Russia .........................................Krasny Chikoy, Transbaikalia, Eastern Siberian Region, Russia Jindr=ich KynickĂœ,1 Jan KynickĂœ,2 Bryan...INTRODUCTION Gem tourmaline from Russianâs Transbaikalia region has become a valuable part of our global mineral...Chikoy, Chitinskaya Oblast, central Transbaikalia region in Zabaykalsky Krai, Eastern Siberia, Russia. The...Malkhan, covers an area of nearly 100 km2, mostly on southern slopes of the Malkhan Ridge, at the confluence |  | De Toni, G.B., Bitencourt, M.F., Nardi, L.V.S., Florisbal, L.M., Almeida, B.S., Geraldes, M. (2020) Dom Feliciano Belt orogenic cycle tracked by its pre-collisional magmatism: The Tonian (ca. 800 Ma) Porto Belo Complex and its correlations in southern Brazil and Uruguay. Precambrian Research, 342. 105702 doi:10.1016/j.precamres.2020.105702 | Journal (article/letter/editorial) | | Ma) Porto Belo Complex and its correlations in southern Brazil and Uruguay G.B. De Toni, M.F. Bitencourt...Ma) Porto Belo Complex and its correlations in southern Brazil and Uruguay, Precambrian Research (2020)...Ma) Porto Belo Complex and its correlations in southern Brazil and Uruguay De Toni, G.B.Âč*; Bitencourt...belt are discussed and integrated in an Occamâs Razor model for the evolution of the Kaoko-Dom Feliciano-Gariep...and arc-magmatism migration towards the back-arc region, with generation of arc-related, Tonian magmatic |  | | Book | | localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...(Chamberlain and Robinson, 2013). MALAWI Mount Malosa, Chilwa alkaline province, Zomba district. "Illite" is the...discoveries in the famous alkaline pegmatites of Mount Malosa in the late 2000s include specimens showing...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during |  | Mukhopadhyay, Dhruba, Srinivasan, R., Senthilkumar, P., Bhattacharya, Tapas, Sengupta, Prabir (2001) Archaean-Neoproterozoic Terrane Boundary in the South Indian Granulite Belt in East Gondwana. Gondwana Research, 4 (4) 711-712 doi:10.1016/s1342-937x(05)70507-4 | Journal (article/letter/editorial) | | eastern segment of the PCSZ near Namakkal. The region south of Namakkal is characterised by the presence...enderbitic gneiss, the contact between them being razor sharp in many outcrops and parallel to the common...rocks are exposed in the Namakkal region in a metamorphic dress. U-Pb zircon ages from enderbites, granitic...retrogressive alteration occur within the gneisses. Zircon ages from the granites and gneisses range from...Hornblende-plagioclase symplectite is common in the southern part of the granulite terrane in the transition |  | | Journal (article/letter/editorial) | | squares can be easily separated by a single edged razor blade, then stuck on the bottles and trying to set...Garnets. No. 2 is garnet sand from the extreme southern tip of India and No. 3 is from the extreme eastern...moved in. Then there are some pure crystals of zircon from Lincoln, Calif., some ilmenite sand from the...we visited the very interesting and spectacular Mount Rushmore carvings in South Dakota and we picked |  | | Report (volume) | | CENTER, Mississippi-Bldg. 3101 The Volcanogenic Mount Rogers Formation and the Overlying Glaciogenic Konnarock...Southwestern Virginia By DOUGLAS W. RANKIN The Mount Rogers Formation, largely continental rift-facies...arkose, and laminite. Four rhyolite members of the Mount Rogers are named and described U.S. GEOLOGICAL...Publication Data Rankin, Douglas W. The volcanogenic Mount Rogers Formation and the overlying glaciogenic Konnarock...etc.Virginia. 3. Rocks, Sedimentary-Virginia. 4. Mount Rogers Formation. 5. Konnarock Formation. I. Title |  | | Journal (article/letter/editorial) | | specimen is permitted any independent strip. The mount thus formed is inserted movement whatsoever. A rigid...that the leg portion of it will be the mount which is handled a mount constructed in this manner will rather...tendency to spring outwardly, and As regards the mount proper, there are by pressing against the ends of...hold suggest themselves, and personal prefer- the mount in position. In effecting such ence will largely...largely govern what form is removal of the mount from the tray, a selected. The provision of an individual |  | Ellis, B.S., Mark, D.F., Troch, J., Bachmann, O., Guillong, M., Kent, A.J.R., von Quadt, A. (2017) Split-grain 40Ar/39Ar dating: Integrating temporal and geochemical data from crystal cargoes. Chemical Geology, 457. 15-23 doi:10.1016/j.chemgeo.2017.03.005 | Journal (article/letter/editorial) | | during petrogenesis. Sluggish diffusion within zircon allows the growth of the crystal, reïŹecting the...yet hitherto it has been most fully utilised with zircon. The generation of the highest precision 40 Ar/39Ar...+ fayalite + ilmenite + magnetite and accessory zircon and apatite as is typical for Yellowstone rhyolites... but occasionally three or four) using a clean razor blade and a fragment b2 mm in diameter was selected...xxxâxxx PRE-SPLIT POST-SPLIT grain #64 2 mm 87 razor blade Sr/86Sr via TIMS 40 Ar/39Ar geochronology |  | Szymanowski, Dawid, Wotzlaw, Jörn-Frederik, Ellis, Ben S., Bachmann, Olivier, Guillong, Marcel, von Quadt, Albrecht (2017) Protracted near-solidus storage and pre-eruptive rejuvenation of large magma reservoirs. Nature Geoscience, 10 (10) 777-782 doi:10.1038/ngeo3020 | Journal (article/letter/editorial) | | crystallization temperatures and ages of magmatic crystals of zircon and titanite in the 900 km3 Kneeling Nun Tuff (New...evolution of the magma reservoir. We show that zircon and titanite crystals record more than 600,000...crystallization (about 720 to 730 ⊠C). We apply the zirconâtitanite systematics to a suite of other super-eruptions...storage) conditions of a relatively refractory phase (zircon) or in placing only relative constraints on storage...combining high-precision UâPb geochronology of zircon and titanite with mineral thermometry19,20 of the |  | Fritz, Jörg, Tagle, Roald, Ashworth, Luisa, Schmitt, Ralf Thomas, Hofmann, Axel, Luais, BĂ©atrice, Harris, Phillip D., Hoehnel, DesirĂ©e, Ăzdemir, Seda, Mohr-Westheide, Tanja, Koeberl, Christian (2016) Nondestructive spectroscopic and petrochemical investigations of Paleoarchean spherule layers from the ICDP drill core BARB5, Barberton Mountain Land, South Africa. Meteoritics & Planetary Science, 51 (12) 2441-2458 doi:10.1111/maps.12736 | Journal (article/letter/editorial) | | occurrence of primary minerals (Ni-Cr spinel and zircon). We favor a single impact scenario followed by...absorption features in the short wave infrared (SWIR) region of the electromagnetic spectrum. Infrared images...= tonaliteâtrondhjemiteâgranodiorite. of the southern Barite Valley Syncline (Fig. 2) (Hofmann et al...2007; Mason et al. 2013). The stratigraphy of this region has been described in detail by Lowe and Nocita...and Processing Fig. 2. Geological map of the southern part of the Barite Valley Syncline (for location |  | | Report (issue) | | rhyolite. Geology and Petrology of the San Juan Region Southwestern Colorado By ESPER S. LARSEN, JR.,...addition, a geological map and description of the southern part of the Lake City quadrangle has been published...Har- VI GEOLOGY AND PETROLOGY OF THE SAN JUAN REGION, COLORADO vard University contributed liberally...mining men and other residents of the San Juan region have also aided in the field work, especially the..._______-______-___-____-_-_ The Gunnison River region. _________________ Location and subdivision. __ |  | | Journal (issue) | | 30067, Tel: 770-973-3632, E-mail: jcgray@gsu.edu Southern California Chapter Visit our website at www.mineralsocal...Lynch Station in Campbell County, Virginia, on the southern bank of Bishop Creek. It is not indicated on the...Highway 43. Figure 2. Mines and prospects in the southern portion of the James RiverâRoanoke River manganese...occurrences of iron and manganese ores are located in the Mount Athos Formation, which contains beds of quartzite...quartzite and an included white marble unit of the Mount Athos Formation. The shaft sunk in search of copper |  | Clarke, D. Barrie, McFarlane, Christopher R.M., Hamilton, David, Stevens, David (2017) Forensic Igneous Petrology: Locating the Source Quarry For the âBlack Graniteâ Titanic Headstones In Halifax, Nova Scotia, Canada. The Canadian Mineralogist, 55 (1) 145-177 doi:10.3749/canmin.1600037 | Journal (article/letter/editorial) | | process of elimination and application of Ockhamâs razor, indicate that the Charles Hanson quarry near Bocabec...composition. Figure 4 and Table 1 show the results of the zircon age determinations by LA-ICP-MS. A combination...ratios TABLE 1. RESULTS FOR IN SITU LA-ICP-MS U-Pb ZIRCON DATING 0.309 0.987 0.567 0.261 0.584 0.194 0.632...and statistics.ââ In the case of the LA-ICP-MS zircon ages, the chi-squared test for homogeneity (KalbïŹeish...evidence against the null hypothesis that the mean zircon ages of Baxter, Ritcey, and Hanson quarry are not |  | | Journal (article/letter/editorial) | | BurstallGranite and its felsicdike apophyses have zircon U-Pb systemswhich are confidently interpreted as...in the strata-bounddeposits.Kucha (1982, 1983) razor. proposesthat the noble metals were leached from...Poland:Inst. MiningMetallurgy Adelaidean basin, southern Australia (Rowlands, Trans., deposits, v. 92, |  | | Journal (issue) | | intense green demantoid. There was one with larger razor sharp 5/8 to 3/4 inch crystals on white matrix that...ipio de Allende. C hihuahua 17- J· l ,4.S massif. southern Urn!, 17-1 : 10 llumboldlinc. Michigan. Kcarsargc...Quarry 17-11 : 1.6.7 Ll'lllllllcinile. Russia: Mount Koaslwa . Kh,bina a lbhnc Rollanditc. France. copper...17-10:10 Zincowoodwarditc. Greece: Laurion 17-9: IO Zircon, Arkansas: Manin Maricna Jones Mill Quarry 1711...2,4 France near Cha1caubrian1, Loire-Atlanliquc region, lulzacite 17-4:10; Roua Mine (and nearby mine) |  | | Journal (article/letter/editorial) | | July 2008 Accepted 19 September 2008 Keywords: Zircon Monazite UâPb Palaeoproterozoic Svecofennian Bothnian...(2006) rely wholly on their interpretation of the zircon geochronologyâ (although we are happy to defend...of conformable deposition is no stronger on the southern boundary of the Robertsfors group near Ărnsköldsvik...The authors note that an age estimate from one zircon fraction of 1933 ± 3 (MSWD 0.97) âcompares well...1930 or ca. 1885 Ma, especially as the younger zircon population exhibits typical magmatic features.â |  | | Report (chapter) | | and SmâNd whole-rock methodologies. Later UâPb zircon ages (e.g. Zeitler). Some early isotope data, predominantly...crust. Magmatic stratigraphy. Plethora of UâPb zircon age dates. Range of isotopes (e.g. Hf, Pb), in...stratigraphical units of the island arc terrane. The Southern Plutonic Complex comprises the Jijal, Sapat and...Amphibolites. The Chilas Complex is situated between the Southern Plutonic Complex and the Gilgit Complex. The Gilgit...of, and are cut by, the Indus Suture, on their southern boundaries. At its maximum extent, the Jijal Complex |  | | Journal (article/letter/editorial) | | Bushmanland Group through the addition of new detrital zircon age data. We trust that these data will ultimately...referencing of recent contributions relevant to this region of the Namaquland Metamorphic Province. Our most...a detailed, regional lithological and detrital zircon-based provenance study (McClung, 2006). Therefore...concordia age obtained for the cores of four detrital zircon grains from a quartzite sample (DC01143) from the...zone, A-G = Aggeneys-Gamsberg district. detrital zircon age distributions reported for four samples of |  | | Journal (article/letter/editorial) | | Bushmanland Group through the addition of new detrital zircon age data. We trust that these data will ultimately...referencing of recent contributions relevant to this region of the Namaquland Metamorphic Province. Our most...a detailed, regional lithological and detrital zircon-based provenance study (McClung, 2006). Therefore...concordia age obtained for the cores of four detrital zircon grains from a quartzite sample (DC01143) from the...zone, A-G = Aggeneys-Gamsberg district. detrital zircon age distributions reported for four samples of |  | | Journal (issue) | | Taking a maple hug and cutting a thin slice with a razor, he laced this be tween two pieces of window glass...made his ïŹrst public speech in a paper on the â Mount ing of Opaque Objects." In October, 1886, he married...apart, and by Decany and Skan on the south. This region is covered with alluvium resting on the diludium...light blue sapphire of two carats has been cut) ; zircon, in doubly terminated tetragonal prisms, similar...near Hintelhelmsdorf, in Saxon Switzerland. A ïŹne zircon crystal, eight millimetres in length, from this |  | | Journal (article/letter/editorial) | | discussed in this paper represent 24 stations in the region southwest of the Grand Banks where many cable breaks...repairing the cables. So far as the cables lying in the region of the earthquake are concerned, the broken speci-...ink or colorless garnet is third in importance. Zircon was noted in all but one sample, but is not common...Other grains include sphene, rutile and apatite. Zircon is rare and never euhedral. Sand portion of number...from the original sample shows a few grains of zircon, considerable hornblende, some apatite, irregular |  | | Book | | shell of rocks that now surrounds the core. This region became dominated by tl1e elements silicon and magnesium...minerals they contain. The other reason lies in the region that the magma reaches as it gets close to the...pyramids, as well as prisms. Tetragonal crystal of zircon ~ Tetragonal 26 Monoclinic. Three unequal...Bauxite is named after Les Baux, a small place in southern France. It is the main ore of aluminium. Bauxite...Two of the more easily recognised are garnet and zircon. H owever, the most widespread of these minerals |
|
