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L.D. Ricketts
Louis Davidson Ricketts (December 19, 1859 – March 4, 1940) was an American economic geologist, metallurgist, mining engineer and banker who pioneered development of copper mines in the U.S. state of Arizona and the Mexican state of Sonora. Early career Ricketts was born in Elkton, Maryland on December 19, 1859. He was educated at Princeton University, earning both a B.Sc. (1881) and D.Sc. (1883), being a Fellow in Chemistry and a Fellow in Economic Geology. He then went to Colorado and began at the bottom in Leadville as mine surveyor and assayer, then foreman of a short-lived mine operation near Silverton, Colorado, and, finally, as a consultant and expert witness on geology for mine lawsuits in Leadville, Aspen and elsewhere. In 1887-1890 he served as Geologist for Wyoming Territory. In 1890 he was recruited by Dr. James Douglas of Phelps Dodge (PD) and began his long mining career in the Southwest borderlands. His first years were filled with more failures than succ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elkton, Maryland
Elkton is a town in and the county seat of Cecil County, Maryland, Cecil County, Maryland, United States. The population was 15,443 at the 2010 United States Census, 2010 census. It was formerly called Head of Elk because it sits at the head of navigation on the Elk River (Maryland), Elk River, which flows into the nearby Chesapeake Bay. Elkton was once known as the Gretna Green of the East of the US because of its popularity as a place for Elopement, eloping couples to marry. History The town was founded by New Sweden, Swedish mariners and fisherman from Fort Casimir who settled the area in 1694. They called their settlement Head of Elk, as it was the head of navigation of the Elk River (Maryland), Elk River. The town saw several actions during the American Revolutionary War. On August 25, 1777, Sir William Howe, 5th Viscount Howe, William Howe's Anglo-German army (13,000 British soldiers and 5,000 Germans) landed on the Elk River and marched 11 miles north to Head of Elk. Howe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porphyry Copper
Porphyry copper deposits are copper ore bodies that are formed from hydrothermal fluids that originate from a voluminous magma chamber several kilometers below the deposit itself. Predating or associated with those fluids are vertical dikes of porphyritic intrusive rocks from which this deposit type derives its name. In later stages, circulating meteoric fluids may interact with the magmatic fluids. Successive envelopes of hydrothermal alteration typically enclose a core of disseminated ore minerals in often stockwork-forming hairline fractures and veins. Because of their large volume, porphyry orebodies can be economic from copper concentrations as low as 0.15% copper and can have economic amounts of by-products such as molybdenum, silver, and gold. In some mines, those metals are the main product. The first mining of low-grade copper porphyry deposits from large open pits coincided roughly with the introduction of steam shovels, the construction of railroads, and a surge in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caltech
The California Institute of Technology (branded as Caltech or CIT)The university itself only spells its short form as "Caltech"; the institution considers other spellings such a"Cal Tech" and "CalTech" incorrect. The institute is also occasionally referred to as "CIT", most notably in its alma mater, but this is uncommon. is a private university, private research university in Pasadena, California. Caltech is ranked among the best and most selective academic institutions in the world, and with an enrollment of approximately 2400 students (acceptance rate of only 5.7%), it is one of the world's most selective universities. The university is known for its strength in science and engineering, and is among a small group of Institute of Technology (United States), institutes of technology in the United States which is primarily devoted to the instruction of pure and applied sciences. The institution was founded as a preparatory and vocational school by Amos G. Throop in 1891 and began ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ricketts House
The house system is the basis of undergraduate student residence at the California Institute of Technology (Caltech). Caltech's unique house system is modeled after the residential college system of Oxford and Cambridge in England, although the houses are probably more similar in size and character to the Yale University residential colleges and Harvard University house system. Like a residential college, a house embodies two closely connected concepts: it serves as both a physical building where a majority of its members reside and as the center of social activity for its members. The houses resemble fraternities at other American universities in the shared loyalties they engender. Unlike in fraternities, however, potentially dangerous "rushing" or "pledging" is replaced with two weeks of "Rotation" at the beginning of a student's freshman year, and students generally remain affiliated with one house for the duration of their undergraduate studies. Freshmen have historically ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palmer C
Palmer may refer to: People and fictional characters * Palmer (pilgrim), a medieval European pilgrim to the Holy Land * Palmer (given name), including a list of people and fictional characters * Palmer (surname), including a list of people and fictional characters Arts and entertainment * ''Palmer'' (film), a 2021 American drama film * Palmer Museum of Art, the art museum of Pennsylvania State University Places * Palmer River (other) * Mount Palmer (other) Antarctica * Palmer Inlet, Palmer Land * Palmer Land, a portion of the Antarctic Peninsula * Palmer Peninsula, former American name of the Antarctic Peninsula Australia * Palmer, Queensland, a locality * Palmer, South Australia, a town * Palmer River (Northern Territory), a tributary of the Finke River * Palmer River, Queensland Canada * Palmer, Ontario, Canada, a community in Burlington * Palmer, Saskatchewan, an unorganized hamlet * Palmer Township, Algoma District, Ontario * Palmer, British Col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ajo, Arizona
Ajo ( ) is an unincorporated community in Pima County, Arizona, United States. It is the closest community to Organ Pipe Cactus National Monument. The population was 3,304 at the 2010 census. Ajo is located on State Route 85 just from the Mexican border. History ''Ajo'' is the Spanish word for garlic (). The Spanish may have named the place using the familiar word in place of the similar-sounding O'odham word for paint (''oʼoho''). The Tohono O'odham people obtained red paint pigments from the area. Native Americans, Spaniards, and Americans have all extracted mineral wealth from Ajo's abundant ore deposits. In the early nineteenth century, there was a Spanish mine nicknamed "Old Bat Hole" that was abandoned due to Indian raids. Tom Childs, Sr., found the deserted mine complete with a shaft, mesquite ladders, and rawhide buckets in 1847. He did not stay long at that time, because he was on his way to the silver mines near Magdalena de Kino, Sonora. Thirty-five ye ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New Cornelia Mine
The New Cornelia mine is a currently inactive open-pit copper mine in Pima County, Arizona, United States. It was the only productive mine in the Ajo mining district, and is located just outside the town of Ajo, which was built as a company town to serve the New Cornelia mines. The roughly circular pit is one and a half miles across at its widest point, and 1,100 feet deep at the center. Although not generally regarded as a 'dam', the New Cornelia Mine Tailings is often cited as the largest dam structure in the United States with a volume of 7.4 billion cubic feet. History, archaeological mining history Native Americans had long mined surface exposures of copper veins near the New Cornelia for pigments: red copper oxide and green copper carbonate. Spanish miners are known to have excavated test shafts in the area by 1750, but the amount of copper produced is not known. Americans claimed the location in 1854 and shipped a few loads of selected ore to Swansea, Wales, but high t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Campbell Greenway
John Campbell Greenway (July 6, 1872 – January 19, 1926) was an American businessman and senior officer of the U.S. Army Reserve who served with Colonel Theodore Roosevelt in the Spanish–American War and commanded infantry in World War I. He was the late husband of U.S. congresswoman Isabella Greenway. Early life and education John Campbell Greenway was born in Huntsville, Alabama, to Dr. Gilbert C. and Alice White Greenway. On both sides, he was a direct descendant of a line of notable Americans dating to before, and during, the American Revolutionary War including William Campbell, Isaac Shelby, Samuel McDowell, Ephraim McDowell, and Addison White. He attended Phillips Academy, Andover, attended the University of Virginia before completing a PhB in 1895 from the Sheffield Scientific School at Yale University. He was a member of the Book and Snake secret society, president of his class, and a member of noted the Yale Football teams from 1892 to 1895 that went a combin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Froth Flotation
Froth flotation is a process for selectively separating hydrophobic materials from hydrophilic. This is used in mineral processing, paper recycling and waste-water treatment industries. Historically this was first used in the mining industry, where it was one of the great enabling technologies of the 20th century. It has been described as "the single most important operation used for the recovery and upgrading of Sulfide#Geology, sulfide ores". The development of froth flotation has improved the recovery of valuable minerals, such as copper- and lead-bearing minerals. Along with mechanized mining, it has allowed the economic recovery of valuable metals from much lower grade ore than previously. Industries Froth flotation is applied to a wide range of separations. An estimated 1B tons of materials are processed in this manner annually. Mineral processing Froth flotation is a process for separating minerals from gangue by exploiting differences in their hydrophobicity. Hydrophob ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miami, Arizona
Miami (Western Apache: Goshtłʼish Tú) is a town in Gila County, Arizona, United States. Miami is a classic Western copper boom-town. Miami's old downtown has been partly renovated, and the Bullion Plaza Museum features the cultural, mining and ranching history of the Miami area. According to the 2010 Census, the population of the town was 1,837. Geography Miami is located at 33°23.8'N 110°52.3'W (33.396, -110.872). According to the United States Census Bureau, the town has a total area of , all land. Miami is adjacent to Globe, and near the San Carlos Apache Indian Reservation. Miami, Globe, and the unincorporated areas nearby (including Inspiration, Claypool and Central Heights-Midland City) are commonly called Globe-Miami. The town is located on the northeastern slope of the Pinal Mountains, and is surrounded (except to the east) by the Tonto National Forest. It is located on U.S. Route 60 and is served by the Arizona Eastern Railway. Demographics As of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cananea, Sonora
Cananea is a city in the Mexican state of Sonora, Northwestern Mexico. It is the seat of the Municipality of Cananea, in the vicinity of the U.S−Mexico border. The population of the city was 31,560 as recorded by the 2010 census. The population of the municipality, which includes rural areas, was 32,936. The total area of the municipality is approximately . History The first non-indigenous inhabitants of the present day Cananea, arrived in 1760 from other parts of the Spanish Viceroyalty of New Spain (colonial México). In the 19th century General Ignacio Pesqueira, from nearby Arizpe, retired to Cananea. He fought against the Apache who raided the area. One time, while following them into the mountains, he discovered the abandoned Spanish mines and by 1868 he had renewed the extraction of minerals in the Cananea mines. General Pesqueira's wife, Elena Pesqueira Pesqueira, "discovered" a nearby mountain range (''sierra'') and the General named the highest peak ''La Elen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Globe, Arizona
Globe ( apw, Bésh Baa Gowąh "Place of Metal") is a city in Gila County, Arizona, United States. As of the 2020 census, the population of the city was 7,249. The city is the county seat of Gila County. Globe was founded c. 1875 as a mining camp. Mining, tourism, government and retirees are most important in the present-day Globe economy. The Globe Downtown Historic District was added to the National Register of Historic Places in 1987. Geography Globe is in southern Gila County at (33.399858, −110.781570), in the valley of Pinal Creek, a north-flowing tributary of the Salt River. U.S. Route 60 passes through the city, leading northeast through the Fort Apache Indian Reservation to Show Low, and west to Phoenix. The western terminus of U.S. Route 70 is in Globe at US 60 on the east side of town; US 70 leads southeast through the San Carlos Apache Indian Reservation to Safford and to its eastern terminus at Atlantic, North Carolina. Arizona State Route 77 leads south ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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