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| single dike that extends more than 2 km [ 7 ] . We shall call this the Northern Dike. Several dike-like...southern block. The best studied of these is the dike, confined to the southern fault, which separates...Ridge. We shall call this the Southern Dike. The Southern Dike is confined to the northwesterly-striking...contact with the migmatites. Thin sections of the dike rock show bands parallel to the contact, which consist...of the Main Ridge; 6) rhyolites; 7) El'dzhurta granite; 8) ultramafics; 9) tectonic contacts. Figures |
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| Granodiorite 5 Keller Butte Granite 7 Granite porphyry 9 Garnet -bearing granite 10 Younger intrusive rocks...rocks 11 Hypabyssal dike rocks 11 Hornblende-free rhyodacite 11 Hornblende dacite 12 Devils Elbow pluton...pluton 13 Joe Moses Creek stock 18 Seriate granite 19 Geochemistry 21 Analytical procedures 21 Major-element...Granodiorite 7 7. Relation of composite aplite-pegmatite dike and microcline megacrysts in Manila Creek Granodiorite...Keller Butte Granite from Peter Dan Creek 9 11. Microcline megacrysts in Keller Butte Granite from podlike |
 | Chernyshev, I. V., Bakharev, A. G., Bortnikov, N. S., Goltsman, Yu. V., Kotov, A. B., Gamyanin, G. N., Chugaev, A. V., Salānikova, E. B., Bairova, E. D. (2012) Geochronology of igneous rocks at and near to the Nezhdaninka gold deposit, Yakutia, Russia: U-Pb, Rb-Sr, and Sm-Nd isotopic data. Geology of Ore Deposits, 54 (6) 411-433 doi:10.1134/s1075701512060049 | Journal (article/letter/editorial) |
| (IDTIMS) and RbāSr methods. The lamprophyre of the dike complex that occurs in the ore field and spatially...metamorphic belt. These dioriteā granodioriteāgranite intrusions, which are often regarded as controlling...metamorphic belt and related dioriteāgranodioriteāgranite intrusions are considered to be a back zone of...volcanism in the UMA, the dior iteāgranodioriteāgranite plutons were formed in the South Verkhoyansk Synclinorium...the AptianāEarly Paleogene Kyutep and Darlerchan graniteāleucogranite plutons related to an episode of extension |
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| structure Principal types of pegmatite Graphic granite Other very coarse-grained pegmatite Pocket pegmatite...of gem tourmaline, 48-49 8 Metamorphic rocks Dike rocks Other rocks 2. 5 5 6 6 General features...Crystal fragments of gem 11 11 12 12 13 15 15 16 16 16 18 18 19 21 21 22 24 24 25 26 27 29 30 30 31 49...rock. C, Photo of coarse- 48-49 grained graphic granite 48-49 Photo of 48-49 .4, Photo of color-zoned...locations of principal 7 Photo of large graphic-granite mass Diagrammatic sketch showing typical relation |
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| http://econgeol.geoscienceworld.org/. 0361-0128/16/4455/2111-28 (6) other types of affiliated mineralization...Mesoproterozoic/ Neoproterozoic cover 1.86-1.85 Ga granite suite JLD DeVries 1.87-1.86 Ga granodioritemonzogranite...al., 2013). Conversely, plutons of the biotite-granite suite emplaced at 1858 to 1850 Ma are postkinematic...(Treasure Lake Group), volcanic rocks (Faber Group), dike swarms, and subvolcanic intrusions (Fig. 2). The...Ma, which is the age of a syndeformation granitic dike that cuts this group (Fig. 1; Bennett and Rivers |
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| Chemical data 15. San Juan Mountains: *fe/y?fca/Ā£/*r* 16. Eastern border of the Colorado Plateaus: r/r?/...subseries represented by the *V 62 -ails-long Iron Dike. Uranium, 0.4-2.6 ppm 2) alkalic potassic series...the latite flows of Table Mountain, by a latite dike near Rollinsville, and by the phaneritic Caribou...significant sections of thorium-rich Silver Plume granite -a*- distinctly higher than the Th p j values for...thorium-rich Silver Plume granite when plotted against the average thorium content of the granite fall along a straight |
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| and monzotonalite ___________________________ _ Granite ___________________________________ _ D14 14 ...-------------Plagioclase pegmatite __________ --_-----Granite pegmatite _____ -----------------Hypabyssal rocks...3. Photomicrographs of the border zone of the granite ____________________________________________________... IV CONTENTS Page FIGURE 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. Photograph and..._______________________ - ____ Photograph and photomicrograph of granite near Bungalow______________________________________________ |
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| PageĀ· TABLES 1. 2. 3. 4. 5. 6. 7. 8. 9-13. 14. 15. 16. 17. 18-26. 27. 28. 29. 30. 31. 32. 33. 34-44. ...__ 12. Minerals of a sample of the Silver Plume Granite, Silver Plume, Colo ______________________ _ 13...--------------------------~----------------- 3 3 6 6 8 9 16 21 24 24 24 25 25 26 26 30 30 36 36 36 36 36 36 36...ppb gold. Plutonic rocks, ranging from gabbro to granite in alkalic provinces of the Eastern United States...of generalizations in igneous rocks. Two sets of 16 samples plus four monitors can be suggested by the |
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| ______________________________________________ Granite gneiss and pegmatite.______________________________...Biotite-muscovite granite___________________________________ Granite pegmatite_________________________________________...location of mines and the distribution of veins and dike rocks. Geologic map of the Diamond Mountain mine...__________________________ 5. Variations in modal composition of granite gneiss and pegmatite and biotite-muscovite gra...Geologic map of the Belle Creole tunnel.-_____ _-___ 16. Geologic map of the Bell of the West tunnel._____ |
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| . . . . . . . . . . . . . . . Burro Mountain granite . . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . . . 15 15 16 16 18 Volcanic rocks . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . 117 16. Underground workings, Co-op mine, Gold Hill ......the Neglected mine . . . . . 77 10. Fractured granite, the fractures containing seams and coatings of...miles to the northeast corner of sec. 3, T. 17 S., R. 16 W., thence diagonally southeast 23 miles to a point |
 | Sui, Ji-Xiang, Li, Jian-Wei, Jin, Xiao-Ye, Vasconcelos, Paulo, Zhu, Rui (2018) 40Ar/39Ar and U-Pb constraints on the age of the Zaozigou gold deposit, Xiahe-Hezuo district, West Qinling orogen, China: Relation to early Triassic reduced intrusions emplaced during slab rollback. Ore Geology Reviews, 101. 885-899 doi:10.1016/j.oregeorev.2018.08.014 | Journal (article/letter/editorial) |
| 1.4 Ma (2Ļ), whereas a post-ore diorite porphyry dike has a U-Pb age of 237.5 Ā± 1.4 Ma (2Ļ). Two samples...swarm of granitoid dikes. Numerous sediment- and dike-hosted disseminated gold deposits have been discovered...plutons consist of quartz diorite, granodiorite, and granite. Laser ablation ICP-MS and SHRIMP zircon U-Pb dates...have diorite, quartz diorite, granodiorite, and granite compositions that are similar to plutonic bodies...phenocryst minerals. Accessory minerals in each dike type are broadly consistent and include zircon, |
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| Sudbury Igneous Complex is surrounded by a zone, over 16 km wide, of rocks containing shatter cones. The outcrop...south. The Early Proterozoic Creighton and Murray granite plutons intrude the Huronian Supergroup along the...Rhyolite Murray Granite Metavolcanics and Metasediments Figure 3. Sudbury Breccia dike extending from...metres to about 30 m across. Rarely, flow-banded, dike-like apophyses intrude up to a few tens of metres...Collins and Cooke 1938a, 1938b, 1947a, 1947b), a ring dike (Knight 1917; Wil liams 1957) or a lopolith (Dietz |
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| 30 31 32 34 35 36 36 36 38 Ā· 39 41 41 41 42 43 Granite Pikes-----------------------------------------...----------------Ā·-Ā·Ā·Ā·Ā·Ā·Ā·Ā·Ā·-Ā·Ā·Ā·Ā·Ā·Ā· Peak granite ___ ā¢.ā¢ ____ ā¢ā¢ā¢ā¢ __ ā¢ā¢ _.. ___ ā¢ ______ ā¢ā¢ __ ā¢ _. _ā¢ā¢ā¢ā¢...Creek granite ... ----.-----------------.----- _____________ . _. __ ... __ ā¢.. Spring Creek granite .....___ ........ __ . ____ .. -.-- .. Ā·.------.Bas~c dike rocks _. ______ . __ . ___ . ___ . _.. _Ā·. _Ā·_....rock~-Continued. Tertiary volcanic rocks-Continued. Basic dike rocks-Continued. Tracbydolerite (Isabella type) |
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| 1 Physical features 1 Climate and vegetation 16 work Acknowledgments Field 1 17 17 ~ GEOLOGIC...Golden Gem group 20 121 district Montezuma 16 1 121 district Area south of Pine Valley El Cajon...Stonewall (Stonewall Jackson) mine Warlock group Granite Graphite ___ Gypsum Iron, by M. Stewart and...expansible Sand Company) Silver Stone, dimension Granite ā Geology 218 221 223 223 223 228 229 230...(gray granite) Escondido area (black granite) Vista area (black granite) Pala area (black granite) ___ |
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| Received 11 September 2007; received in revised form 16 December 2007; accepted 23 December 2007 Abstract...evidence for two distinct episodes of subparallel dike emplacement at ca. 1450 and 780 Ma. Published geochemical...Paleomagnetic results from these dikes and a group C dike yield antipodal magnetizations with a group-mean...consistent with published UāPb dates that demonstrate dike emplacement at 780 Ma as part of the regional Gunbarrel...is also a primary magnetization associated with dike emplacement. Paleomagnetic data from some of the |
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| ENGLAND (CNE) AND ATLANTIC CANADIAN MAGMATISM 1. Mafic Dike Suites Within Mesozoic Igneous Provinces of New...Jersey . John H. Puffer and James J. Student 261 16. Paleomagnetism of Igneous Rocks in the Culpeper...that fed the initial ENA magma pulse (the Higinum dike) is projected into southeastern New Hampshire by...by Sundeen and Huff (Chapter 5) as the Onway dike. In Chapter 9 Jaroslav Dostai and J. Greenough provide...reports on eight diabase sheets and one associated dike from the central Newark Basin. He concludes that |
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| alkali-calcic syenite, and calcic orthopyroxene granite (pincinite). The intrusive complex beneath the...alkalic syenite, carbonatite, and calc-alkalic granite. Both reservoirs originated during the basaltic...crystallized from mildly alkalic syenite and calc-alkalic granite. Zircons with increased Hf/Zr and Th/U ratios occur...Occasional granite fragments range in composition from barren magnesian and calcic orthopyroxene granite (pincinite)...productive, HFSEand REE-rich ferroan calc-alkalic granite [6ā8]. Despite the diverse compositions, trace |
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| area (such as Elizabeth, Vermont, or Outokumpu, Finland). This does not mean that it would not be possible...Geologiska UndersƩkning (Ser. Aa 3, Ser. Ca 7, Ser. C 16)................ incshintion or Vinimnesand Veta...187, no. 2). 16 BIBLIOGRAPHIES OF HYDROTHERMAL AND MAGMATIC MINERAL DEPOSITS 16. Lang, A. H....thorium, Geol. Surv. Canada Econ. Geol. ser., no. 16, p. 46-57 17. Donald, K. G., 1956, Pitchblende at...Yellowknife: Geol. Assoc. Canada Pr., v. 5, p. 95-107 16. Henderson, J. F. and Brown, I. C., 1952, The Yellowknife |
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| and associated hornblendite_ Biotite-muscovite granite ______________ _ Pegmatites ____________________________...porphyry ________________________ _ Trachytic granite porphyry _________________ _ Quartz bostonite porphyry...11 11 13 13 14 14 14 14 14 14 15 15 15 15 16 16 16 16 16 17 17 17 18 18 19 20 21 21 21 22 22 22 22... 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28....semiquantitative method, given in percent__:.._~ 16. Semiquantitative spectrographic analyses and chemical |
 | Lord, A. Brooke Hamil, McGregor, Heath, Roden, Michael F., Salters, Vincent J.M., Sarafian, Adam, Leahy, Rory (2016) Petrogenesis of coeval sodic and potassic alkaline magmas at Spanish Peaks, Colorado: Magmatism related to the opening of the Rio Grande rift. Geochimica et Cosmochimica Acta, 185. 453-476 doi:10.1016/j.gca.2016.04.019 | Journal (article/letter/editorial) |
| Sarafian, Rory Leahy PII: DOI: Reference: S0016-7037(16)30178-8 http://dx.doi.org/10.1016/j.gca.2016.04.019...United States 10 11 12 13 14 August 27, 2015 15 16 17 18 19 Prepared for a Special Issue of Geochimica...mafic lamprophyres and gabbros to silicic 79 granite porphyries (e.g., Knopf, 1936; Johnson, 1968, Jahn...and Sr, Nd and Hf isotopic compositions of mafic dike and sill rocks. 101 Most of the samples are lamprophyres...PETROGRAPHY 163 164 Seventeen localities, primarily dike/sill exposures but also including 165 Goemmer |
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| orientation. Tectonically, it is confined to the Markha graniteāgreenstone terrane, which repre sents a collage.... iR u t Ko II 13 20 19 21 14 12 17 8 1011 16 7 18 9 15 22 6 Olenek R. 5 4 R. Muna 3 2 ...(14) Khorbusuon; (15) Malaya Kuonamka (Kuranakh); (16) Luchakan; (17) Dāyuken; (18) Srednyaya Kuonamka;...0.41 16.32 2.64 4.02 99.85 1.8 13 124 903 45 509 16 53 83 145 11 120 84 1.5 946 71 130 13.8 47 6.8 1...Tb Dy Ho Er Tm Yb Lu Hf Ta Th U Gorn Daikovaya Dike B yatskaya Malyutka Iksovaya Argys Elektra Popugaeva |
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| geochemistry of Kimberlites and related rocks from Finland. 634 637 643 OāReilly, S.Y., Griffin, W.L.,...Xenoliths from the Lahtojoki Kimberlite Pipe, Eastern Finland. Peltonen, P., Huhma, H., Tyni, M., Shimizu, N...Garnet Peridotite Xenoliths from Kimberlites of Finland: Nature of the Lithospheric Mantle at Archaean...Fugacities of Peridotite Xenoliths from the Eastern Finland Kimberlite Province. 963 The Ningxiang Lamproites...illustrated by xenoliths from basalts: J. Petrol., 16, p. 454-487. Ninomiya, A. and Arai, S., 1992. Harzburgite |
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| rock which forms the bulk of the mass. A 20-foot dike of soda trachyte, similar to that of Solitario Peak...2. Intrudes Rim sill at Solitario Peak. Intrudes dike similar to Solitario Peak soda trachyte and the...about a mile northwest of Payneās WaterĀ hole a dike of analcite trachybasalt porphyry 3 feet wide outcrops...end of the Payneās Waterhole structure is cut by a dike 3 feet wide of analcite trachydolerite which extends...Alpine road is the only composite dike seen. The rocks in this 30-foot dike are pinkish weathĀ ered trachyandesite |
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| in Shelburne Pond, Vermon ............... . 15. 16. 17. 18. BREAK . . . . . . . . . . ....occurrences in the field. Dike I is a massive greenstone with biotite porphyroblasts; Dike II is a fine-grained...clear intrusive contacts with the country rock; Dike III contains large feldspar phenocrysts. The geochemistry...Sturt, 1981) of the Kjosen Formation as the sheeted dike complex of a dismembered ophiolite. Numerous other...gabbrodiorite, syenite and granite stocks and a prominent crescentshaped syenite ring dike. 16 At least fourteen |
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| ............................................... 16 Age and correlation...............................days with precipitation. 17 6 12 4 14 4 18 7 16 4 13 5 14 5 17 7 20 10 21 14 19 9 Period of...which has transformed the Treadwell albite-diorite dike into an auriferous lode. The ore bodies are therefore...advocated by Pirsson in " Eocks and rock minerals.." 16 THE BERNERS BAY REGION, ALASKA. PETROGRAPHY. The...of the Portland mill on the shore of Lynn Canal a dike of diorite porphyry 50 feet thick is well exposed |
