 | | Report (issue) | | accessibility from areas of high population density. These outcrop localities, mainly in the southeast, are not necessarily...Igneous rocks: a simplified classification 9 Some outcrop localities in southeastern Manitoba 10 l. Locality...Clay minerals Chlorite Amphibole Pyroxene Olivine Calcite & dolomite Iron oxides & sulphides Other minerals...marble , a metamorphic rock composed of crystals of calcite (calcium carbonate) which have been formed from...TONALITE (QUARTZ DIORITE) QUARTZ Biotite Hornblende Pyroxene ANDESITE BASALT DIORITE Hornblende Biotite |  | | Report (volume) | | contact metamorphosed where they are adjacent to diorite sills of Precambrian Z age. The following descriptions...several localities, the Spokane is intruded by a diorite sill of Precambrian Z age, and the strata are commonly...normal faults. Where the Spokane is hornfelsed by diorite sills, the strata are drab gray and contain fairly...the eastern part of the Silver King addition, a diorite sill inflects upward into the Empire and has altered...individual lenses of the sandstone as viewed in outcrop are commonly as much as 200 feet (61 m) long, and |  | | Journal (article/letter/editorial) | | The Evolution of the Criffell-Dalbeattie Quartz-diorite: A Study of Granitization. By MALCOLM MACGREGOR...and many others. II. GRANITIZATION. The quartz-diorite at the western end of the Criffell-Dalbeattie complex...without deflection up to the contact of the quartz-diorite. The unaltered sediments comprise (a) greywackes...calcareous shale. 483 Criffell-Dalbeattie Quartz-diorite. The granitization of the sediments, considered...Small quartz grains in coarser layers and a little calcite. B. Pelitic layer of banded shale hornfels (1864 |  | | Journal (issue) | | oldest rocks known. Many of these Lake Superior region and the furnaces were originally gravels, sands...that existed the iron deposits of this region have in this region a billion or more years yielded from...ones being specularite (thin flat rhombs) and calcite. Occasionally galena, asbestos and native silver...we stop at the outcrop just south of the bridge over Dead River. This granite outcrop is cut by pegmatites...years. Specimen No. 3. Granite obtained from the outcrop on the lake shore. Its essential constituents are |  | Coats, J S, Shaw, M H, Gallagher, M J, Armstrong, M, Greenwood, PG, Chacksfield, BC, Williamson, J P, Fortey, N J (1991) Gold in the Ochil Hills, Scotland. Mineral Reconaissance Programme Report 116. British Geological Survey | Report (issue) | | Detailed sampling Comparison of sub-areas North Fife Region Central Ochils Microprobe analysis of gold grains...Introduction Basalts and andesites Pyroclastic rocks Diorite 51 51 51 51 53 53 26 26 28 28 40 40 41 46 ...Geochemistry 55 Basalts and andesites Pyroclastic rocks Diorite Dyke rocks DRILLING Introduction Geophysical logging...compositions of lava, pyroclastic, porphyry and diorite with average north Midland Valley lava 56 5 ...andesitic lavas and pyroclastics intruded by a diorite body and porphyry dykes. Minor hydrothermal alteration |  | | Report (volume) | | ........................................ 33 Calcite............".....................................country......................................... Diorite dikes.......................................................... Diorite porphyry...................................... Albite-diorite...................................................... 99 Albite-diorite.......................................... 99 Basalt................... A, B, Stringer lead in brown diorite, Ebner mine, Gold Creek.......... Alaska-Juneau |  | | Journal (article/letter/editorial) | | gramsaggregating about3,400 metersin 20 holes west Pacific region (Titley, 1975), Plesyumi conand about 300 metersof...the Metelen as part of the complexare the quartz diorite and River. They will not be considered further...Chloritized biotite. Biotite-hornblende quartz diorite. Weakly altered sample of Metelen River Intrusion...quartz-richdaciteporphyrywithin the meters of stream outcrop. The rock ranges from volcanicpile indicatean upper...of the The sampleof intrusion was taken from an outcrop volume is composedof lithoclastsand mineral fragin |  | | Journal (article/letter/editorial) | | both the syenite and associated AN gabbro and diorite. Analcime I occurs as a late stage interstitial...megablocks of at least two other igneous lithologies: a diorite and a phaneritic gabbro. The latter is intruded...from ~355 Ma, secondary biotite from ~344 Ma, calcite and pyrite veins related to lamprophyre intrusion...sections from the syenite, the gabbro, PT and the diorite were re-analysed using a JEOL-8200 electron microprobe...of occurrence was separated from the syenite, diorite and gabbro (Table 2). These separates, together |  | Ding, Zhengpeng, Deng, Teng, Xu, Deru, Li, Zenghua, Zou, Shaohao, Li, Lirong, Xu, Ke, Hai, Yan, Ma, Wen (2020) Genesis of Two Types of Carbonaceous Material Associated with Gold Mineralization in the Bumo Deposit, Hainan Province, South China. Minerals, 10 (8) 708 doi:10.3390/min10080708 | Journal (article/letter/editorial) | | are some Yanshanian pegmatite, diorite porphyry, and diorite outcrop outside in the north of the deposit...The gangue minerals mainly include quartz, CM, calcite, and sericite (Figure 3C,D). Previous research...(Q1)-pyrite, quartz (Q2)-sulfides, and quartz (Q3)-calcite stages, with the second stage as the main mineralization...veins and layered includeprecipitated quartz, CM, calcite, (Figure 3C,D). Previous indicates that CM the...white quartz (Q1) grains 4F,G), and quartz (Q3)-calcite stages, with the second stage as the main mineralization |  | | Report (issue) | | 183: Field Relations, i83; Ultrabasic Rocks, 183; Diorite and Gabbro, 183; Granites and Granophyre, 189....of Mavis Grind, Northmaven. Scapolite vein in diorite-granite complex. (D 1344). . B. East shore of Cow...Sandsting Granite-Diorite Complex Photomicrographs of the Sandsting Granite-Diorite Complex Photomicrographs...thermal mineralization in the Sandsting Granite- Diorite Complex Basic, acid and intermediate minor intrusions...account of the Geology of Central Shetland. THE REGION i PHYSICAL FEATURES The area forms a geological |  | | Book (volume) | | Fries 38. Antimony deposits of the Los Tejocotes region, state of Oaxaca . R. Guiza, Jr., and D. E. White...different from that of the Sierra Madre Occidental region. The dams in the states of Tamaulipas, San Luis...local effects of any large-scale investment in a region, such as inflation. Hydroelectric Projects Management...tec¬ tonic, magmatic, and volcanic aspects of a region in which ther¬ mal activity displays similar characteristics...and conglomerates, as well as over a widespread outcrop area of Cretaceous intrusives, in con¬ trast with |  | | Journal (article/letter/editorial) | | along N.E.-S.W. axes. The igneous margin in this region appears to be a normal igneous contact, with a...may be vertical. On the E. side of the igneous outcrop, the margin is largely obscured by glacial drift...a low dome which appears to coincide with the outcrop of the acid member of the complex. This dome is...the rocks pass inwards from a hornblende-biotite-diorite with relict pyroxene, through a belt of increasingly...groups : (i) the pyroxene-mica-diorite, (ii) the hornblende-mica-diorite, and (iii) the " granite ". Of |  | | Report (issue) | | associated rocks 6 Main and Feal diorites 6 Heylor Diorite 8 Roerwater and Hevdadale diorites 9 Petrography...associated rocks Gabbro 13 Hornblende-gabbro 14 Diorite 14 The granites 19 Main Granite 19 Urafirth Granite...51 13 PLAl'ES Photomicrographs of gabbros, diorite and basic xenoliths 27 2 Photomicrographs of granitic...Granitic vein-network in basic rock of the Main Diorite 7 4 Geological map of the Roerwater and Hevdadale...northern Roerwater Diorite 12 7 Vein-plexus of aplite at the base of the Hevdadale Diorite, nortl1 wall of |  | | Report (issue) | | ... 299 Figure 4—Structure Section Figure 5—Diorite Dike ............................ Figure 6—Contour...the area has not yet been surveyed except a small region in the northwest corner of New Hampshire-Whitefield...If all one wants is the general character of the region, he needs only this list, but if he needs the exact...general account of the geological features of the region, the special formations, especially along the west...succeeding Report, Fourth, 1904, the study of the region is further carried on. In this discussion of the |  | | Journal (article/letter/editorial) | | Nickel-copper mineralization occurs near the base of a diorite intrusion close to its contact with hornfelsed...above this and immediately below unmineralized diorite in the form of patches, lenticular masses and stringers...sulpharsenides are presented. The unmineralized diorite has low SiO2 and high MgO contents compared to...and Ti trace element values. In the mineralized diorite, platinum-group elements occur in very low concentrations...and at the base of the largest outcrop of a sheet or sill-like diorite intrusion. The latter was emplaced |  | | Book | | Mountsorrel Complex 102 Polished slab of quartz-diorite fron1 Enderby Warren Quarry 103 Triassic relationships...A shallow sea subsequently covered n1ost of the region and strata of the Penard1 Group accumnlated, alt11ongh...sandstones constitute a 1najor aquifer in the general region, and tl1ere are other, minor aquifers from which...Granodiorite, minor diorite, gabbro Soun1 LEICES'l'ERSHIRE D101UTES Enderby quanz-diorite intrusions STOCKlNGf:ORD...Sandstone Group. lbese sandstones are not found at outcrop, but have been the target of deep drilling since |  | Dawson, J., Floyd, J. D., Philip, P. R., Burley, A. J., Allsop, J. M., Bennett, J. R. P., Marsden, G. R., Leake, R. C., Brown, M. J. (1977) A mineral reconnaissance survey of the Doon-Glenkens area, south-west Scotland. Mineral Reconnaissance Programme Report 18. Institute of Geological Sciences | Report (issue) | | Geological Survey Sheets 4, 8, 9, 14 and 15. The region is dominated by the ring of high ground formed...increasing to abo ut 3 kilometres not far below outcrop, suggesting a gently dipping :roof extending towards...therefore be included in the models. The norite outcrop in the Burnhead complex, for instance, has dimensions...Contours at -100, .....50, 0, 50, 100, 200, 300 ppm © Region of local EM low t:LEET GRANITE For kev to geol...a relatively resistive band coinciding with an outcrop of pillpw spilite la.va, and l:tboratory measurements |  | | Field Trip Notes | | part of the sierran Gold Belt (49). This entire region has come to be known generally as the Mother Lode...country, and through their stories the romance of the region has become familiar to all the world (49). Although...by ridges of moderate height. Vegetation in this region is sparse and is composed largely of digger pines...logging operation remove much of the timber in this region (49). º trimm sm. … - California State Mining...8) wide here and has numerous metagabbro and diorite inclusions, one of which yielded an 40 ARV39 AR |  | | Report (volume) | | about N. 70° E., dips about 70° NW., and ranges in outcrop width from 70 to 400 feet. Westward, the shear...are spaced over a distance of 120 feet. The only outcrop showing asbestos is in an escarpment about 10 feet...feet east of the northernmost pit. In the outcrop, seven veinlets of cross-fiber asbestos occur over...brecciated and lias been recemented with quartz, calcite, and limonite. No sulfide minerals wTere observed...leached. B38 STUDIES RELATED TO WILDERNESS An outcrop of the zone along the north side of Deer Creek |  | | Journal (volume) | | and some Hawaiian coasts, the grains are mainly calcite (CaC0 3 ). Other sands natural] sands are i <...SAN OIEGO * Figure 1. Index map of coastal region of part of California foundry-sand localities...3. 4. 5. 6. 7. 8. 9. Index map of coastal region of part of California showing foundrysand localities...analyses and tests of a taken from a 2,000-foot outcrop. 14 series of samples At the mine the "ganister"...are Madagascar, Brazil, India, England, Russia, Germany, Bulgaria, and perhaps others. Uraninites (pitchblende |  | | Report (issue) | | ------------------- 27 Plate I. General map of region of Picuris and Petaca areas ------------------------In...furnished copies of notes made by him on visits to this region. The analyses of the lithia content of minerals...area drains south-ward into the Rio Chama. The region is sparsely inhabited but is accessible by good...history to the Proterozoic rocks of the Great Lakes region. Great thicknesses of sedimentary rocks similar...Proterozoic rocks of these areas and of the Great Lakes region suggest the possibility that the Proterozoic sediments |  | Johnson, Scott E., Paterson, Scott R., Fletcher, John M., Girty, Gary H., Kimbrough, David L., Martín-Barajas, Arturo - Eds. (2003) Tectonic evolution of northwestern Mexico and the Southwestern USA. GSA Special Paper 374. Geological Society of America doi:10.1130/0-8137-2374-4 | Report (issue) | | layers and several generations of leucosome. The outcrop occurs within the transitional section of the batholith...His approach of weighing mineral dates against outcrop areas validated basic concepts of “orogenic periodicity”...major mapping projects in the Vizcaino Peninsula region of west-central Baja California that established...established much of the basic geology of the region, including documentation of ophiolite complexes. He did early...well as his efforts in understanding this complex region. We also thank the authors for their diligence |
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