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The mine produces copper and molybdenum concentrate as well as SX/EW copper cathode from a ROM oxide-leaching system. [1] Sierrita was acquired by Duval Corporation in 1959; Pennzoil acquired a controlling interest in Duval in 1968. [2] Sierrita was operated by Cyprus Mines (later Cyprus Amax Minerals) from 1986 to 1999.
One of the responsibilities of the Maricopa County Recorder's Office is the recordation and maintenance of public documents. These public records include an array of documents but the vast majority are real-estate related. The Office records approximately 1 million documents annually and interacts with 3,000 to 5,000 customers on a daily basis. [9]
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Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole.The log may be based either on visual inspection of samples brought to the surface (geological logs) or on physical measurements made by instruments lowered into the hole (geophysical logs).
In Arizona, copper mining has been a major industry since the 19th century. In 2007, Arizona was the leading copper-producing state in the country, producing 750 thousand metric tons of copper, valued at $5.54 billion. Arizona's copper production was 60% of the total for the United States. Copper mining also produces gold and silver as ...
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During such drilling, data is acquired from the drilling rig sensors for a range of purposes such as: decision-support to monitor and manage the smooth operation of drilling; to make detailed records (or well log) of the geologic formations penetrated by a borehole; to generate operations statistics and performance benchmarks such that ...