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| platinum-group minerals of the Freetown Layered Complex, Sierra Leone. 1 John F.W. Bowles1, Saioa Suárez2...rivers and river terraces near York, Freetown Peninsula, Sierra Leone have been examined for their platinum-group...primary and placer PGM support the proposal that the Freetown nuggets developed as a result of breakdown of...Keywords: Platinum-group minerals • Freetown Intrusion, Sierra Leone • Alluvial • Nuggets Introduction...Introduction Alluvial PGM in the western hills of the Freetown Peninsula, Sierra Leone, W Africa were first found |
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| sulfides and Pt–Fe alloys in the Freetown Layered Complex, Sierra Leone John F. W. Bowles 1 & Saioa Suárez...rocks and saprolite from Horizon B of the Freetown Layered Complex contain platinum-group minerals (PGM)...show progressive weathering (corestones). Ground water passing through the saprolite has transported Pt...Keywords Platinum-group minerals . Freetown intrusion . Sierra Leone . Weathering . Mobility of platinum...and alluvial deposits from the Freetown Layered Intrusion in Sierra Leone, West Africa, since 1926 and |
 | | Journal (article/letter/editorial) |
| rces of SierraLeone S. •¾. }•OREL Abstract Sierra Leone forms the central part of the sundered West...the Atlantic ocean. TheArchean rocks ofSierra Leone consist ofa granitic basement containing elements...horizons. The Triassic-Lower JurassicFreetown Layered Basic Complex lies upon the continentalmargin and was...veining. Somealluvial platinumhas beenwon from this complex,but the sourcerock has not yet been identified...well as poor internal communicationshave made Sierra Leone a difficult country in which to carry out geologicaland |
 | | Report (issue) |
| MINERAL INVESTIGATIONS ENGINEERING GEOLOGY AND WATER SUPPLY RECRUITMENT AND STAPP CHANGES Economic Co-operation...Geological Survey Plate XII " Field Activities of the Sierra Leone Geological Plate XIII 79 Survey " Activities...76 " Text-fig. 11 Geological Mapping by the Sierra Leone Geological Survey 82 " Text-fig. 12 Geological...pro vision of aerial photographs of much of the area of the territories concerned, has been responsible...In many parts of the country the succession and complex structures of the Basement Rocks have been studied |
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| EDITORIAL PAGE 1 ARTICLES The Chambe Plateau Ring Complex of Nyasaland. By K. V. Stringer, B.Sc. , Ph.D.... The Anorthosites in the Colony Complex near Freetown, Sierra Leone. By M. K. Wells, M.Sc. , Ph.D., and...Geology and Geophysics, University of Sydney 267 Water Supply Problems in Arid Regions in the British Colonies...Ijolites at Songo, Sierra Leone. By C. O. Baker, B.Sc., and Vladi Marmo, Dr.Ph., Sierra Leone Geological Survey...Swaziland Federation of Nigeria Gold Coast . Sierra Leone Federation of Malaya British Territories in |
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| Ijolites at Songo, Sierra Leone. By C. 0. Baker, B.Sc., and Vladi Marmo, Dr.Ph., Sierra LeoneGeologicalSurvey...STATISTICS • CORRESPONDENCE The Itiaso Series of Western Tanganyika. R. B. McConnell . . . PERSON ALIA...393 393 393 398 399 404 ljolites at Songo, Sierra Leone Plate I Text-fig. 1 Text-fig~ 2 Text-fig. 3...Text-fig. 4 Location and Geological Map of the Ijolite Area at Songo, with Isogam Overlay . . . facing p. Comparative...page • Topography of Devils Peak Area • • • '' Geology of Devils Peak Area • • • '' Diagrammatic Section |
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| P1·otecto1·ate N yasaland . . .. .. . • • Sie1·1·a Leone .. .. • • Somaliland Protecto1·ate .. Southe1n Rhodesia...now in the list of producers are Abyssinia and Sierra Leone. Native platinum appears to have been first...addjtio11a] platinum metals were discovereti, and the complex nature of the naturally occurring metal revealed...in the sulphidic platinum ores of the Bushveld Complex, occurring usually in n1inute well-formed crystals;...Ontario, and in the Merensky Horizon of the Bushveld Complex, Tra11svaal. At Sudbury the platinum metals are |
 | | Journal (issue) |
| 11-12—Santa Barbara and Riverside Chapters of the Sierra Club joint trip to Joshua Tree National Monument...26—Pictograph Tour of White Oaks — Three Rivers area, from Alamogordo, New Mexico. May 27—Homecoming...lupines, gilia and verbena); the Black Rock Canyon area; and Bear Valley road. She believes some areas along...above 1500 feet. From Lake Mead National Recreation Area, Naturalist Philip Welles also has a discouraging...brought up patches of small annuals throughout the area which were expected to come into bloom in midApril |
 | | Report (volume) |
| Survey in furthering the mineral industry in the area tributary to the railroad. ; The district is underlain...no operations were carried on in the Clearwater area and the field work was entirely within the drainage...relatively small area. All the mines and prospects here described lie within an area of 25 square miles...above timber line with the exception of a small area near the mouth of Valdez Creek. This lack of timber...1926 and 1927 some surface work was done on the Big and Little Caribou veins. Shortly afterward the ©laims |
 | | Report (issue) |
| as many as live in New York City) spread over an area almost as large as Texas and California combined...South America and is the third poorest in the western hemisphere. It has achieved the dubious distinction...Amazonian jungle. Geologically this vast lowland area (roughly the size of Texas) is an extension of the...the fastest growing regions, economically. This area boasts a rapidly growing network of roads focused...Venezuela to Tierra del Fuego along the entire western edge of South America, but it reaches its widest |
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| camping facilities, near the entrance. The Monument area, some 80 square miles in extent, is surrounded by...this some of the most spectacular features in the area are to be seen. Immediately to the northwest of...time element involved in the development of the area as a whole. Some of the cones are quite, or nearly...in this respect may be drawn between the Craters area and the famous volcano of Krakatau. In the summer...island. The Craters of the Moon, moreover, is not an area of violent activity such as Krakatau, Vesuvius, |
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| Geochemistry (d) Zn-Cu-Pb Association Geochemistry 1. Sphalerite Group 2. Hauerite-Alabandine Group 3. Chalcopyrite...study of the properties of minerals in all their complex varietynot only the history of their formation...were among the first metals employed widely for water-pipes and other purposes. Copper and later iron...minerals, and of magnesium from magnesite and sea water, employed as light alloys in the construction of...ionic radii of the corresponding ions. For more complex compounds the lattice energy can be calculated |
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| ee oe TERTIARY BEDS OF THE INN VALLEY IN THE AREA OF KUFSTEIN-WORGL ....... THE MOLASSE ZONE BETWEEN...BETWEEN THE RIVERS SALZACH AND INN AND THE AREA PADI OAde2LED eesee oe Re toss one ee Cer ek Pe an tee Ce...eee eee eee ewe eee ee ee THE MOLASSE ZONE OF THE AREA OF ST. POLTEN AND TULLN .................... THE...Ghadeia cig RNEON Sle ty a The EG The The Oe ee Area between the Rhine Valley in the West and the Cross...an aera wee Area from the Cross Valley of the Inn to the Weyrer Bogen 2, 4c. 6 ee eee Area from the Weyrer |
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| . . . . TERTIARY BEDS OF THE INN VALLEY IN THE AREA OF KUFSTEIN-W0RGL . . . . . . . THE MOLASSE ZONE...ZONE BETWEEN THE RIVERS SALZACH AND INN AND THE AREA OF AMSTETTEN . . . . . . . . . . . . . . . . . . ............. : . . 20 20 THE MOLASSE ZONE OF THE AREA OF ST. P◊LTEN AND TULLN . . . . . . . . . . . ............................................. . The Area between the Rhine Valley in the West and the Cross...• • The Area from the Cross Valley of the Inn to the Weyrer BOgen ................. . The Area from the |
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| JOYCE MUENCH . . . . NATURE "Dry Lake" Filled With Water By EDMUND C. JAEGER . EDUCATION Adult Education...led me into another room and gave me a bath in a big tub, then put one of the ticking dresses on me. At...at the kitchen. We were given a tin cup full of water, a round hardtack cracker, and tin saucer full of...conceded that placing raw ore in a bank vault was big news — and Seven Troughs boomed! No one knows who...Halfway House—a small station at a good spring of water on the west slope of the Trinities. Stages required |
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| Desert Peaks Section, Southern California Chapter, Sierra Club climb of Mt. Jefferson, Nev. Sept. 5-7—Old...Southern California Chapter, Sierra Club climb of Mt. Tom in the High Sierra. Climb from camp at Horton...Is there a trail up the canyon? Is there a good water supply? Palm trees? Indian campsites? There are...catsclaw. Here is the story of what a party of Sierra Club explorers found in this little known gorge...several months ago when the schedule committee of the Sierra Club, Southern California chapter, asked Jim Gorin |
 | | Journal (issue) |
| rink of file into a huge drying room where they big league proportions and a. small ice · strip and hang...shown in Fig. l , an outline map of the Utah desert area. The geode placers are best reached from Salt Lake...Roads are good desert roads, but adequate fuel, water, food and tools should be taken along; military...areas are shown in Fig. 3, a sketch map showing the area between Dugway Pass and the Black Rock Monument...can be found anywhere in the map area except on the salt fiats. Area A is the most productive at present |
 | | Report (issue) |
| consisted mainly of mixed sulphides (the Eureka area in the Kantishna district, Mount Eielson, formerly...arrive at a final judgment of the resources of the area but pointed to the desirability of further tests...in the district. Along the eastern border of the area examined during the present study limestone, schist...deposition of metallic minerals. This part of the area appears to justify more prospecting than it has...drainage basin of Clearwater Creek. The location of the area mapped is shown in figure 1. The work was greatly |
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| Picher Mine Area A: Opalized Wood, Agate, Opalite............... 60 Eagle Picher Mine Area B: Opalite...Mine Area C: Opalite.................................................. 64 Eagle Picher Mine Area D: Opalite...paid off and others didn’t, but on balance it was a big plus. Without doubt, though, the most important person...rock shops, gift shops, and any place else in the area. Good tips are often found in the most unlikely...Nevada It seems that everyone who writes about any area describes it as “paradise.” Such-and-such river |
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| Nights" E COUNTY and the Coachella Valley desert area w roll out the magic Arabian carpet for the thousands...just completed the first modern exploration of the area, and his maps, filling in what formerly had been...'It's impossible! You can't do ill' There was no water supply. No teachers. No anything else. Nothing!...in barrels with little faucets. It wasn't clear water. It was brown. B.it you could drink it." The building...bricks—and I didn't know how! But I learned. Mix water, you FEBRUARY, 1952 know—and put a thing here |
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| patterns are wild and free Until man comes with water, power: Then waste land grows abundantly Vast cotton...Desert Lands 15 By EDMUND C. JAEGER HISTORY 17 Water Is Urgent Need of Navajos FRONTIER Their Grubstake...of the Month 26 My Bamboo Was the Traveling Kind WATER 28 By RUTH REYNOLDS CONTEST 28 River Forecast for...six-guns pointed at him he backed slowly toward the big safe, and then turned and made a sudden dash for...Later when Murphy and Hobson brought in irrigation water from the Colorado River and opened Palo Verde Valley |
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| headlights, window glass and reflectors—checks your water and oil and tests the tires. Like every feature...auditorium, F.I Centro, California. March 29-April 5—Sierra club Easter vacation trip to southern Arizona and...meet, Snow Bowl, Flagstaff, Arizona. April 5-6—Sierra club, Desert Peaks section, climb of Coso and Maturango...largely o\ petrified wood from the Vermilion cliffs area. mens for the cabinets at home. When we drove on...and dropped through a break in the rim toward the big valley. It was the most likely spot we had seen and |
 | | Journal (issue) |
| and his God. THE DESERT MAGAZINE Ruins of the big community house Puivige, which means "pueblo where...part of Bandelier national monument, a forested area of 27,000 acres under the administration of our...huddled in fright. They stopped in the San Juan area of northwestern New their tracks—tense, waiting...to the Rio Grande for thousands of years. It ran water year in and year out— this canyon was the most coveted...reestablishing themselves in the Rio Grande valley where water was ever flowing. Quite recent archeological investigation |
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| by Daoguang (1846), it was written that “In the western part of Yanjingshan . . . [at] a place called Xikuangshan...made available a 1:150,000-scale map of the Xinhua area; the map includes Xikuangshan, formerly a part of...Swede named Dingerlan studied the geology of the area in the winter of 1915–1916 and described it in his...last of these, Zhi Wang and Qing Figure 3. The complex structural geology of the Xikuangshan mining district...Figure 4. Geological section through the Xikuangshan area (adapted from Wu et al., 1990). Ru completed a |
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| the platiniferous ores of the Bushveld Igneous Complex with particular reference to the Rustenburg Platinun1...Design and construction of underground bulkheads and water barriers- W. S. GARRETT and L. T. CAMPBELL PITT...the gold mines-E. W. GRAY I, 1319 1 357 I Li 19. Water proble1ns of the Transvaal and Orange Free State...with its extensions in the Orange Free State, the Western Transvaal and the Far East Rand is perhaps the...the new mines of the Orange Free State and the Western Transvaal are very rich - the best having a mill |
