 | | Book (edition) | | trisocta- silver hedron trisocta- gold platinum galena hedron halite for tetragonal Jor rhombic- ...halides (fluorite) and a large number of sulfides (galena, sphalerite, chalcopyrite, stibnite, pyrite, etc...objects or replacing fibers of wooden supports. Occurrence up to 3 cm (1 .1 The 8 finest crystals of...mineral, either in ciated with calcite or e Occurrence The finest dendritic and wirelike crystals come...deposits, formed at high hydrothermal conditions. Occurrence The main gold-bearing temperature under districts |  | | Book | | unusual development, as to represent a mineral occurrence worth recording. Among the major types of igneous...Oronto Group a.. 3: co w C: _J 0 0 Marquette Iron District, Baraga and Marquette Counties diabase dikes...chalcopyrite chlorite group chromite chrysotile clinozoisite covellite cubanite dolomite gersdorffite hornblende...and used by Native Americans millennia ago. The occurrence of monazite-(Ce) in the Precambrian Goodrich...apatite group brookite clinozoisite copper corundum datolite diamond galena glauconite gold ilmenite |  | | Report (volume) | | Director Bulletin 906-D GEOLOGY OF THE SEARCHLIGHT DISTRICT CLARK COUNTY, NEVADA BY EUGENE CALLAGHAN Contributions...___.-_-___-_______-_________. Outlook for the district...----____-__._-_-_-_-_______-_________. Mines...main part of the district._________ Mines and prospects in the eastern part of the district.__-_-.______...Geologic map of the main part of the Searchlight District, Clark County, Nev____._-_-_-_-._.___.-_-.__________...Nevada and Utah showing location of Searchlight district and areas covered by previous publications of |  | | Report (volume) | | GEOLOGY AND ORE DEPOSITS OF THE CHICHAGOF MINING DISTRICT ALASKA BY JOHN C. REED AND ROBERT R. COATS UNITED...Greenstone-schist sequence...---_-_--__.-_-_-_-___-___--_-__ Occurrence and relations_______________________________...Greenstone_______l-_-______--__-_______-________.__-___-_ Occurrence and relations.______________________________...__-_____--_____------_-------_----__-._-_.-----Occurrence and relations.______________________________....._._._.-__...__.-.-..._..--__...-._... 24 Occurrence and relations.____-__.__--_.-__._._.._---.__ |  | | Report (volume) | | ORE DEPOSITS OF THE BAYARD AREA, CENTRAL MINING DISTRICT, NEW MEXICO BY SAMUEL G. LASEY Prepared in cooperation...ORE DEPOSITS OF THE BAYARD AREA, CENTRAL MINING DISTRICT, NEW MEXICO By SAMUEL G. LASKY ABSTRACT This...in the southwestern part of the Central mining district, Grant County, N. Mex. Practically the entire...wide. This zone 2 BAYAED AREA, CENTRAL MINING DISTRICT, NEW MEXICO is part of a northeastward-trending...argentiferous mixtures of sphalerite, chalcopyrite, galena, and pyrite accompanied by quartz and calcite. |  | | Report (volume) | | sedimentary rocks of the Belt Series, which in this district are 40,000 feet thick. The Belt rocks here are...formations of the same name in the Coeur d'Alene district; the Ravalli is correlated with the Burke formation...Revett quartzite, and St. Regis formation of that district. In the southwest corner of the quadrangle is...000. Their more abundant metallic minerals are galena, pyrite, and sphalerite, and their gangue is quartz...quantities of one or more of the sulfides pyrite, galena, sphalerite, and pyrrhotite. In specimens from |  | | Book (edition) | | Tectosilicates 397 405 423 446 356 Contents 6. OCCURRENCE AND ASSOCIATION OF MINERALS Rocks and Rock-forming...in a garden has seen minerals in their natural occurrence. The rocks of the mountain, the sand on the beach...to 2 Introduction I materials of natural occurrence. Thus, cement, plaster, and glass are not steel...face-centered lattice. This structure is also found in galena PbS, MgO and many other AX compounds. thermal...as the only form on a few minerals. The other Occurrence of Isometric Forms of the Hexoctahedral Class |  | | Book | | System of mineral classification 8 Origin and occurrence of minerals 8 Associated minerals 11 Properties...Lastly, data on the genesis, associated minerals, occurrence and application are included. The tabulated section...the minerals in this book as well. Origin and occurrence of minerals In order to gain some knowledge of...zone, sulphur compounds (eg pyrite, chalcopyrite, galena and sphalerite) c.:hange into oxygen salts (eg...certain mineral deposit or rock, and eliminate the occurrence of some others. Examples of associated minerals |  | | Report (issue) | | Director , . A Bulletin 849 G THE GIRDWOOD DISTRICT, ALASKA BY C. F. PARK, JR. Investigations in...PLATE 33. Geologic map and sections of Girdwood district, Alaska. _ In pocket. FIGURE 1. Index map showing...mixed sulphides (the Eureka area in the Kantishna district, Mount Eielson, formerly known as Copper Mountain... THE GIRDWOOD DISTRICT, ALASKA By C. F. PABK, Jr. ABSTRACT The Girdwood district has been known for...obtained at six different localities within the district, the rocks are considered of Upper Cretaceous |  | | Book | | TABLE 1 IN THE ABOYNE GEOLOGICAL SEQUENCE DISTRICT. Igneous rocks Period Sediments/sedimentary...Highlands; a brief summary of the drift geology of the district is included. Apart from a small area of Silurian...index minerals was first described from the Aboyne district. During the last main fold episode, brittle monoclinal...with uplift. Much of the northern part of the district is underlain by the Mount Battock granite pluton...the north-east in the southeastern part of the district. An ice stream that flowed along Strathmore laid |  | | Report (issue) | | ______________________---_---_.__ The Franklin mining district. _.---.-----_-----_-_--_ General features.--_---...19 19 19 20 20 20 20 20 20 The Franklin mining district Continued. The ore deposits Continued. Paragenesis...PLATE 1. Geologic map of the Franklin mining district, showing principal mineral localities.:______...described in this paper, have been found in the district, 32 of which were first found there, and 30 are...included 2 of the 3 principal ore minerals of the district. The chemical composition of the ore bodies is |  | | Book (edition) | | minerals have been added and the localities of occurrence have been updated and expanded. The special uranium...seldom present, with a resultant paucity of occurrence) tend to be in smaller crystals. Common minerals...granite as a rule, though its texture and its occurrence are similar. Like granite, diorite is a group...late low-temperature minerals. The manner of occurrence is noted in the paragraph Environment in each...detailed descriptions. Knowledge of the type of occurrence helps to eliminate minerals that might be confused |  | | Book (edition) | | Marble, Limestone 2 Gold, Silver, Copper, Sulphur, Galena, Sphalerite xill 16 17 Kiv ILLUSTRATIONS.... 82 Michi- gan) ay, p.9z 5. Galena on dolomite (Joplin District, MissouriKansas-Oklahoma) p. 92...92 6. Sphalerite (Joplin District, MissouriKansas-Oklahoma) 18 ROCKS This rock is known as basalt....granite as a rule, though its texture and its occurrence are similar. Like granite, diorite is a group...late low-temperature minerals. The manner of occurrence is noted in the paragraph called “environment” |  | | Report (edition) | | Geological Map of Tirbin-Sododeke area, West Siang district, Arunachal Pradesh, Source: Kumar et al., (2015)...Geological Map of Tai-Tachidoni area, West Siang district, Arunachal Pradesh, Source: Kumar et al., (2015)...Chirpatiya Khal Granite in Tehri and Rudraprayag district, Uttarakhnad (Chauhan, 2015) 175 Fig.17.2.74...map of the Amritpur Granite complex, Nainital district (Singh, 1979) 178 Fig.17.2.79 Field photograph...Gasku 200 Fig.17.2.111 Photograph showing occurrence of polymetallic sulphides at Bamsu in Mandakini |  | | Report (issue) | | GEOLOGY -AND ORE DEPOSITS OF THE MAGDALENA MINING DISTRICT, NEW MEXICO BY G. F. LOUGHLIN AND A. H. KOSCHMANN...Gabbro____________________________________ • Distribution and occurrence ______________ _ Lithology ______________________...____________________________ ______ _ 9 Distribution and occurrence _____________ _ . Ltlhology _____ __________...______________________________ ~ ____ _ Distribution and occurrence _____________ _ Lithology ___ .. _________________________...__________ __ _________ ____ _ 12 Distribution and occurrence ___ __________ _ 12 Lithology ________ _________ |  | | Report (issue) | | - - - · - - · - - - - - - · · - - - - - · 85 Occurrence .......................... - .. - . - ... - -...... ---.----.---.--.---------------- - -· 86 Occurrence ............................... ___ ... __ ....__________________________________________ -. _.- _.-- _- _86 Occurrence _________ ... _. __ ........ _. __ ..... _.....______ ... _. _. _______ .- .... _. _.. ____ _ 88 Occurrence _________ ... _. __ . __ .. _.. __ . ___ . _...___ .. __. _. _____ _ 89 General character and occurrence ___ . ___ ·... _. ____ ... ___. _. _. __ . _____ |  | | Report (volume) | | information on site location, deposit type, size of occurrence, host-rock lithology and age, and metal associations...Juan basin of New Mexico. Similarities in the occurrence of uranium enrichment in these two areas include... ---1944, Triassic stratigraphy in the Point Pleasant District, Pennsylvania: Proceedings of the Pennsylvania...cross-stratification toward the northwest, and the occurrence and dispersal pattern of clasts of Cambrian-Ordovician...Alpinen Perm: Jahrbuch der Austria Geologischen Bundesanstalt, Vienna, Austria, v. 106, p. 299-361. Koob |  | | Report (Issue volume) | | ORES Da oe ane eeer aee Goonumbla porphyry copper district — Endeavour 26 North, Endeavour 22 and Endeavour...but at deeper crustal levels. Only one local occurrence of felsic or acid volcanics has been recognised...uraninite, chalcopyrite, pyrite, covellite, sphalerite, galena, chalcocite, bornite, chlorite, carbonate, fluorite...as young as Tertiary. Similarities in breccia occurrence and mineralisation have been recognised between...northern Yorke Peninsula, in the Moonta—Wallaroo district, the principal rock types include a schist-gn |  | | Report (issue) | | Presser, and Helen L. Foster-------- 25 Laumontite occurrence in the Circle A-1 quadrangle, Alaska, by Terry...lode gold deposits in the Hope-Sunrise mining district, northern Kenai Peninsula, Alaska, by Miles L...Sketch map showing tracts permissive for the occurrence of mineral deposits, Big Delta quadrangle _____________...and mineralog- plutonic bodies at depth. The occurrence of circuical correlations. lar features encompassing...Porphyry molybdenum mineralization in this The occurrence of this intersection with the southeastern region |
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