 | | Report (volume) | | Fluoritebearing carbonatites are reported from Angola, Kenya, Morocco, Mozambique, Namibia, South Africa...isometric mineral that is generally associated with quartz, chalcedony, calcite, or barite; sphalerite and...Africa, in Namibia (South West Africa), and in Angola and is associated with major fault zones in the...with alkaline intrusive rocks are reported from Angola, Kenya, Malawi, Morocco, Mozambique, Namibia, South...---------------------------- DeKun, 1965. trJ Angola Coola -------------------- 12Ā°31' s. 15Ā°16'E. |  | | Journal (article/letter/editorial) | | relatively primitive isotopic data, d 18O values for quartz separates determined for 19 of the samples range...University of New Mexico. The data were generated from quartz separates hand-picked from samples exhibiting negligible...as determined through petrographic inspection. Quartz d 18O values were generated by conventional techniques...or three times on separate fractions of the same quartz separates. The precision of the results was better...granular and coarse grained, and primarily consist of quartz, alkali, and plagioclase feldspar. The most abundant |  | | Journal (article/letter/editorial) | | Agostinho Neto, Av. 4 de Fevereiro 7, 815 Luanda, Angola Earth and Ocean Sciences, School of Natural Sciences...exsolution in the volcanic carbonatites. K EY WORDS : Angola, carbonatite, zonation in pyrochlore, ļ¬uorine,...carbonatites in Africa (Le Bas, 1971) extends into Angola where the majority of carbonatites crop out along...belong to the ParanaĢ Angola Etendeka F IN CARBONATITIC PYROCHLORE Province and occur as ring complexes...by the Angola Namibia gabbro-anorthosite complex (Issa Filho et al., 1991) (Fig. 1). In Angola, carbonatites |  | | Journal (article/letter/editorial) | | important Bridge River mining camp. Auriferous quartz veins were discoveredin 1896 in the Cadwallader...dominantlyquartz diorite to granodiorite,with some diorite and quartz monzonite. RegionallymetamorphosedLate Triassicto...northernend, several high-level quartz monzonite stocks intrude quartz diorite of the CoastPlutonic Complex...puncturedby intrusionsof granodiorite,quartz diorite, and quartz monzonitethat range in age from Middle...CadwalladerCreek valley. The veins consist mainly of milky quartz (commonlyribboned) with lesseramountsof carbonatesand |  | | Report (issue) | | āDevelopment drive to facilitate stoping ; of quartz carrying low values have work has consisted chiefly... 300 14 3 8 60 68 15 3 ^H 8 Id 6 6 5 coola Tarcoola Blocks Tarcoola 47 20 Eclipse 5 ..... 9 16 14 2 20 2 23 20 8 35 11 25i 68 coola Tarcoola Perseverance Tarcoola Curdnatta Day...i3i;t 22i 3.3i 89i coola Nr. Royal George 501 16 11 18 16 239 62| coola Lake Labyrinth 25 ....... MUes E. of Tar- Day Dawn coola Tai coola Royal George 3 Miles Curdnatta Tarcoola Earea Dam |  | | Book | | every edition of every paper published in the province. In addition, the Archives has some 500,000 historical...chance he staked the remainder of his money on a quartz mine in Nova Scotia. Still ill-fortune pursued...horrible accompaniments arose. But when the Bella Coola were found to be most friendly and peaceful the...grassy knoll overlooking the Williams Lake-Bella Coola Highway at Mile 200 the trenches dug by Alexander...wounded in the ensuing withdrawal toward Bella Coola.ā Below: A photo taken in 1928 of the remains of |  | RODDICK, J. A., GABRIELSE, H., WOODSWORTH, G. J., REESOR, J. E., HUTCHISON, W. W. (1975) Plutonic evolution of the Canadian Cordillera: Discussion and reply. Geological Society of America Bulletin, 86 (11) 1610 doi:10.1130/0016-7606(1975)86<1610:peotcc>2.0.co;2 | Journal (article/letter/editorial) | | control of composition (Gabrielse and Reesor, 1974). Quartz monzonite and granite constitute far less of the...whereas diorite is comparable in abundance with quartz monzonite, and gabbro is certainly more abundant...from Table 1, and for the "coastal belts" shows quartz monzonite to be twice as abundant as diorite and...percent. In fact, diorite is much more abundant than quartz monzonite, and granite forms much less than 1 percent...by rock type, which suggests that progresof the 'quartz diorite line' along the Coast Mountains belt is |  | | Journal (article/letter/editorial) | | 1970), and this is dominated by granodiorites and quartz diorites. Sections of the batholith range in age...per cent higher ratio was observed in chloritized quartz diorites than in unaltered specimens. This alteration...stripping of both these alkalis from biotite. Again in quartz diorites, the average K/Rb value ranged from 346...Sr*ā/Srs6 Std. Dev. of readings Rb/Sr Quartz diorite Granodiorite Quartz diorite Conglomerate cobble Gneiss...BAER A. J. (1968) Model of evolution of the Bella Coola-Ocean Falls region, Coast Mountains, British Columbia |  | | Journal (article/letter/editorial) | | the study area (Fig. 2). First, the Cariboo Gold Quartz, Island Mountain and Mosquito Creek gold mines...tellurides were also mined at the Cariboo Gold Quartz Mine. The precise origin of gold found in placer...the deep weathering and supergene enrichment of quartz veins, containing arsenopyrite and pyrite, during...occasional braided reaches (Fig. 11). The modern Bella Coola River, which drains over 5000 km 2 of the Coast...platform and flood plain deposits of the Bella Coola River Valley are reworked every 150 years; this |  | Girardi, James D., Patchett, P. Jonathan, Ducea, Mihai N., Gehrels, George E., Cecil, M. Robinson, Rusmore, Margaret E., Woodsworth, Glenn J., Pearson, David M., Manthei, Christian, Wetmore, Paul (2012) Elemental and Isotopic Evidence for Granitoid Genesis From Deep-Seated Sources in the Coast Mountains Batholith, British Columbia. Journal of Petrology, 53 (7) 1505-1536 doi:10.1093/petrology/egs024 | Journal (article/letter/editorial) | | performed with AG50W-X12 resin ion-exchanger in 8Ā·9 ml quartz columns, using 2Ā·5 M HCl as eluent for Rb and Sr...medium to coarse grained, and consist primarily of quartz, plagioclase feldspar, alkali feldspar and the...Paleocene intrusions. Granitoids rich in both modal quartz (420%) and alkali feldspar (410%), of tonalitic...(1990). (HDEHP) adsorbed onto PTFE powder in 1Ā·7 ml quartz columns, using 0Ā·18 M HCl as eluent for Nd and...Paleocene^ Eocene intrusion suite, and a 94 Ma quartz diorite. For the samples of this study there is |  | | Journal (article/letter/editorial) | | to Varec 1982 who found evidence o f zeroing in quartz grains in B horizons o f soils forming from glaciofluvial...(December mid-day in Adelaide). The sample is 100 gm quartz grains separated from South Australian beach sand...equivalent and thus an approximation. Similar data for quartz sand have been published by Vlasov et al. 1979...silt Kettle river silt Crowsnest River silt Bella Coola River silt 49Ā°13'N 49Ā°55'N 49Ā°02'N 49Ā°35'N 52Ā°24'N...obtained are listed. F o r the beach sands 90-125 gm quartz grains were separated by a c o m b i n a t i o |  | | Report (issue) | | Atomic Energy Agency: AFGHANISTAN ALBANIA ALGERIA ANGOLA ANTIGUA AND BARBUDA ARGENTINA ARMENIA AUSTRALIA....................................... 49 6.5.1. Angola..................................................metasomatised rocks (fenites); Undersaturated or quartz-saturated acidic pegmatitic, peralkaline plutonic...(Th-REE-U in pegmatites. Th-Rare Metal in sodium quartz-feldspar metasomatites). Type 3 Type 4 Acid...and thorium, REEs, the common gangue minerals are quartz, barite, carbonate, fluorspar, etc. Examples: Lemhi |  | | Journal (article/letter/editorial) | | immediate vicinity of the anomalies. Hypothermal quartz veins of the Surf Point Mine and many of the Mo...greenstone, tuff, and minor marble and greywacke. Quartz dioriteand granodioriteare the mostabundantplutonicrocksin...epidote,calcite,quartz, and diopsideare the occur in plutonic rocks that are generally quartz commongangueminerals...skarnshave resultedfrom the intrusionof nearby quartz-pyriteveins containinghigh but erratic gold plutonic...7esbā¢ryt C> / PLUTONIC ROCKS ā¢ Quartz manzanita ā¢ Gronodiarite ā¢ Quartz diorite -ā¢ Basic plutonlc rocks |  | | Journal (article/letter/editorial) | | stand logical application beyond the limits of the province. For this reason, and because the present study...built of vast masses of plutonie rocks, mainly quartz-diorite, that invaded a heavy cover of sediĀ mentary...Canadian Airways Limited.) 50Ā° 55'), the Bella Coola flowing into the North Bentinck Arm of Burke Channel...Fxgtjbe 16.ā D elta and fiord valley o f Bella Coola R iver Looking east from th e head o f North Bentinck...possible route through the mountains. The Bella Coola Valley, an extension of the North Bentinck Arm of |  | | Journal (article/letter/editorial) | | rivers draining the north-central part of the province (from (Gaillardet et al., 2003)). growth along...Island. Rock samples cover a broader region of the province than do till samples (Fig. 1). In some cases,...are distributed widely in various regions of the province, and fall into the following proportions of rock...concentration of micas and/or maļ¬c minerals, relative to quartz and feldspars, in the clay fraction, and to metal...evolution of the eastern Coast Plutonic Complex, Bella Coola region, west-central British Columbia. Geological |  | Wu, Yingke, Li, Kuo, Wang, Zhaoguo, Hu, Mianshu, Cao, Haiyue, Liu, Qinfu (2021) Fluctuations in Graphitization of Coal Seam-Derived Natural Graphite upon Approaching the Qitianling Granite Intrusion, Hunan, China. Minerals, 11 (10) 1147 doi:10.3390/min11101147 | Journal (article/letter/editorial) | | The Lutang graphite deposit in Chenzhou, Hunan province, China, is a well-known coal seam-derived graphite...graphite occurs at an andalusite bearing sericite quartz chlorite metamorphic mudstone around a c. 530 km2...the coals often include various impurities (e.g., quartz, clays, or pyrite), which decompose by Minerals...; Hancock, K.D. The AA graphite deposit, Bella Coola area, British Columbia_ exploration implications...naturally graphitized coals from central Hunan province, China. Energy Fuels 2019, 33, 1037ā1048. [CrossRef] |  | | Report (issue) | | Bailey and S. Kearns 12. Post-Paleozoic magmatism in Angola and Namibia: A review . . . . . . . . . . . . ...provinces of the Saharan zone, Cameroon volcanic line, Angola and Namibia, and the East African Rift system....and the Ethiopian-Yemenite āAfarā flood basalt province (compiled from Schandelmeier and Reynolds, 1997;...compositionally related to the mainly alkaline province of intraplate magmatism in north Sudan and south... plā plagioclase, spāspinel, ilmāilmenite, qtzāquartz. 2+ *Temperature estimates are after Ellis and |  | HavelcovĆ”, Martina, MachoviÄ, VladimĆr, RenĆ©, MiloÅ”, SĆ½korovĆ”, Ivana, LapÄĆ”k, Ladislav, Å paldoÅovĆ”, Alexandra (2020) Geochemistry of shear zone-hosted uranium mineralisation at the ZadnĆ Chodov uranium deposit (Bohemian Massif) Ore Geology Reviews, 120. 103428 doi:10.1016/j.oregeorev.2020.103428 | Journal (article/letter/editorial) | | paragneisses were medium- to ļ¬ne-grained rocks, containing quartz, plagioclase, biotite, and K-feldspar. The amount...ore stage, very ļ¬ne veinlets of quartz I developed. The post-ore quartz stage is related to the origin...of small veins and veinlets of uraninite II and quartz II. During the post-ore carbonate stage, calcite...small veinlets (Fig. 9F) in altered rocks and in quartz veins, particularly in samples ZCH-10, ZCH-31 and...(Hecht et al., 1991). Temperatures in the post-ore quartz stage, estimated from ļ¬uid-inclusion thermometry |  | | Journal (issue) | | 3. 4. 5. 6. 7. 8. 9. 1D. 11. 12. 13. 14. 15. Quartz Mountain Silica Nickel Mountain (Ni) Old Channel...mines in Oregon, 1981 Map no. 1. Name Location Quartz Mountain Sec. 2 Silica T. 28 S., R. I E. Douglas...livestock food additive for poultry and hogs. The Quartz Mountain Silica Mine in Douglas County (Mine 1)...usually produced 20,000-25,000 tons per year of quartz that is hauled over 26.4 mi of Forest Service roads...the 75-mi trip to the Hanna nickel smelter. The quartz is smelted with scrap iron to make ferro silicon |  | | Report (issue) | | Branch of t~e Department of the Interior; the Province of Ontario P1ctu~es; the United States Bureau...these birds still to be seen in spring in this province, are largely if not entirely little brown cranes...Faribault. Two polished specimens of gold-bearing quartz from Nova Scotia. T. L. Tanton. One specimen from...Douglas channel and the Bella Coola Indians around the mouth of Bella Coola river. These three tribes have |  | | Journal (issue) | | methyst 7 Gems & Minerals occur in cavities in the quartz. Some blue topaz is found with the clevelandite...be dispe rsed . Thi i d o ne by using a liquid coola nt. It is he ld in a tank fro m whic h a pipe lea...ixture o f o il a nd pa ra ffin . Do no t a llow the coola nt to ge t a ll over the work a rea or o n to the...ing; cairngorm is ch 'a ching (tea crystal). Smoky quartz is mo ching, also used for an opaque crystal. Garnet...from old mine dumps, resembling, as it does, small quartz crystals. Francolite is a me mber o f the a patite |  | Menounos, Brian, Clague, John J., Clarke, Garry K.C., Marcott, Shaun A., Osborn, Gerald, Clark, Peter U., Tennant, Christina, Novak, Anthony M. (2013) Did rock avalanche deposits modulate the late Holocene advance of Tiedemann Glacier, southern Coast Mountains, British Columbia, Canada?. Earth and Planetary Science Letters, 384. 154-164 doi:10.1016/j.epsl.2013.10.008 | Journal (article/letter/editorial) | | converted 10 Be/9 Be ratios to 10 Be atoms per gram of quartz (Table 1), from which we calculated ages using...model (DEM) produced from data provided by the Province of British Columbia (British Columbia Ministry...Thickness (cm) Shielding correction Weight (g quartz) 10 Be (103 at gā1 ) 10 TGO-MW-01 TGO-MW-02...Neoglacial history of the Coast Mountains near Bella Coola, British Columbia. Can. J. Earth Sci. 27, 281ā290 |  | | Journal (article/letter/editorial) | | mineralsin the parageneticsequence:fluorite, sphalerite,quartz, calcite,and barite. The bulk of the fluid inclusiondata...s on quartz,sphalerite,calcite,andbariteyield temperatures of 68.3Ćø to 165.1ĆøC for early quartz; 160...157.0ĆøC for barite. Inclusionsin sphaleriteand quartz had salinitieslike those for fluorite of 18.3 to...Pinckney, 1976). mineralsin the parageneticsequence: quartz,sphal- easterly and are warped into a broad arch...chalcopyrite are alsopresent.The chief gangueminerals are quartz, calcite, and barite. Large vugs occur in many |  | Gibling, M.R., Davies, N.S., Falcon-Lang, H.J., Bashforth, A.R., DiMichele, W.A., Rygel, M.C., Ielpi, A. (2014) Palaeozoic co-evolution of rivers and vegetation: a synthesis of current knowledge. Proceedings of the Geologists' Association, 125 (5) 524-533 doi:10.1016/j.pgeola.2013.12.003 | Journal (article/letter/editorial) | | island-braided rivers such as the Tagliamento, Bella Coola and Platte, which are variously gravelly and sandy...M., 2005. Mass-production of Cambro-Ordovician quartz-rich sandstone as a consequence of chemical weathering...Donaldson, J.A., de Kemp, E.A., 1998. Archaean quartz arenites in the Canadian Shield: examples from...The importance of eolian abrasion in supermature quartz sandstones and the paradox of weathering on vegetation-free...soft-sedimentdeformed alluvial sequence, Broken River Province, Northeastern Australia. In: Miall, A.D., Tyler |  | | Book | | of the eastern margin of the Atlantic (Namibia, Angola) or the western African kimberlites do not fulfil...individual chapters: i) the carbonatitic-alkaline province outcropping on the Kenya-Uganda border which have...Petrogenesis of the volcanic rocks of the Karoo Province edited by ERLANK (1984). In addition, a review...review paper related to this volcanic province appeared in the book devoted to the Flood Basalts Provinces...138 139 142 146 146 5 The Mesozoic Tholeiitic Province of Northwest Africa: A Volcanotectonic Record |
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