Geology and ore deposits of the Mina Plomosas district, Chihuahua, Mexico
Author: Steven Graham Reid
Publisher:
Published: 1972
Total Pages: 128
ISBN-13:
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Author: Steven Graham Reid
Publisher:
Published: 1972
Total Pages: 128
ISBN-13:
DOWNLOAD EBOOKAuthor: Luther Wadsworth Bridges
Publisher:
Published: 1962
Total Pages: 532
ISBN-13:
DOWNLOAD EBOOKThree previously unrecognized outcrops of pre-Carboniferous rock in the Mina Plomosas - Placer de Guadalupe area have a total area of slightly less than four square miles. Six units, ranging in age from Ordovician to Jurassic, are mapped within the Plomosas Formation named by Burrows in 1909; the total thickness is about 8,000 feet. The lower 2,000-foot section of Ordovician, Silurian, Devonian, Mississippian, and Pennsylvanian rock, composed predominantly of limestone, resembles contemporaneous formations in west Texas. The 2,000-foot to 3,000-foot section between Pennsylvanian and Late Jurassic rock, composed predominantly of siltstone and conglomerate, consists of a 500-foot to 1,000-foot Permian (Wolfcampian-Leonardian) sequence overlain by beds of undetermined age. The Permian sequence includes a reef. The 3,000-foot section of Late Jurassic rock is composed of shale, sandstone, and limestone. The area lay to the north of the main Ouachita trend, and Paleozoic tectonism was less intense than in the Marathon uplift. Nevertheless, angular unconformities within the Permian sequence indicate Permian movements. Laramide tectonism was extreme, with major overthrusting toward the west. Two large sections are upside-down. Crustal shortening on the order of ten miles can be proved near Mina Plomosas. Probably the sericite and microspar (finely recrystallized limestone), in the Paleozoic and Jurassic rocks, are products of incipient metamorphism resulting primarily from Laramide deformation. Mina Plomosas is an important lead-zinc mine. A little placer gold is found at Placer de Guadalupe. All mineralization in the Placer de Guadalupe - Mina Plomosas area is thought to be Tertiary in age. The petroleum potential of Chihuahua is still untested.
Author: West Texas Geological Society
Publisher:
Published: 1964
Total Pages: 156
ISBN-13:
DOWNLOAD EBOOKAuthor: Howard Edmund Quinn
Publisher:
Published: 1926
Total Pages: 18
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DOWNLOAD EBOOKAuthor: Harrison Ashley Schmitt
Publisher:
Published: 1927
Total Pages: 16
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DOWNLOAD EBOOKAuthor: Richard Dean Knowling
Publisher:
Published: 1977
Total Pages: 167
ISBN-13:
DOWNLOAD EBOOKAuthor:
Publisher:
Published: 1966
Total Pages: 972
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DOWNLOAD EBOOKAuthor: Richard W. Davy
Publisher:
Published: 1927
Total Pages: 70
ISBN-13:
DOWNLOAD EBOOKAuthor: Wade H. Shafer
Publisher: Springer Science & Business Media
Published: 2013-12-11
Total Pages: 299
ISBN-13: 147575776X
DOWNLOAD EBOOKMasters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis, (CINDAS) *at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity was transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 19 (thesis year 1974) a total of 10,045 theses titles from 20 Canadian and 209 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 19 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.
Author: Raoul Gustin Bergman
Publisher:
Published: 1925
Total Pages: 448
ISBN-13:
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