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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 31 to 40 of 311 (0.089 seconds)Spelling suggestions: "subject:"lima county"" "subject:"lima bounty""
| 31 |
Diary of an internship with the Pima County Adult Probation Department State of ArizonaHibbs, William H. January 1964 (has links)
No description available.
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| 32 |
The development of fractures in the mesozoic volcanic rocks adjacent to the Sierrita porphyry copper deposit, Pima County, ArizonaThompson, Randolph Charles January 1981 (has links)
No description available.
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| 33 |
STRUCTURE AND PETROGRAPHY OF THE EAST SIDE OF THE SIERRITA MOUNTAINS, PIMA COUNTY, ARIZONALootens, Douglas J. January 1965 (has links)
No description available.
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| 34 |
Geology and ore deposits of the Rosemont area, Pima county, ArizonaThomas, Walter L. January 1931 (has links)
No description available.
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| 35 |
Geology and ore deposits of the Sunshine area, Pima County, ArizonaHigdon, Charles Eugene, 1908- January 1933 (has links)
No description available.
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| 36 |
Oxidation-leaching, and enrichment zones of a porphyry copper deposit: a mineralogic and quantitative chemical studyKoenig, Brian A. January 1978 (has links)
No description available.
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| 37 |
The geology and ore deposits of the Cuprite mining districtLee, Charles Albert, 1908- January 1935 (has links)
No description available.
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| 38 |
The geology of the Mam-A-Gah picnic area, Tucson Mountains, Pima County, ArizonaHorton, John William, 1932- January 1966 (has links)
No description available.
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| 39 |
The geology of the Esperanza Mine and vicinity, Pima County, ArizonaLynch, Dean W. January 1967 (has links)
No description available.
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| 40 |
Geochemical investigation of the Del Bac Hills volcanics, Pima County, ArizonaPercious, Judith K., Percious, Judith K. January 1968 (has links)
The Del Bac Hills are a northeast-trending chain composed of mid-Tertiary Turkey Track porphyry dikes and flows, overlain by potassic basaltic andesites intercalated with sediments. These hills are considered the southernmost extension of the Tucson Mountains and lie along a northeast-trending basement scarp which extends across the Tucson Basin. Turkey Track porphyry intrudes the San Xavier conglomerate as two parallel dikes, closely associated in time but with different magnetic orientations. Potassium-argon dating of a flow associated with the older dike yielded a mean of 26.8 m.y. for plagioclase phenocrysts and groundmass. Plagioclase of the younger dike sampled 50 feet from the contact with the San Xavier conglomerate and at a depth of approximately 200 feet yielded an anomalous age of 46.4 m.y., representing 0.29 x 10^-10 moles per gram excess Ar4° in comparison with the extrusive. The 21 basaltic andesite flows are essentially contemporaneous at 24-25 m.y. Tight grouping of K/Rb and Rb/Sr for the basaltic andesites confirms the field inference of two separate sources. Specific gravity and initial Sr^87/Sr^86 determinations for the porphyry and basaltic andesites do not preclude a comagmatic origin for the two rock types. Post-extrusive faulting along three principal directions has established the present configuration of the hills.
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