The Doña Ana Mountains are a small, rugged mountain range in the desert a few kilometers north of the city of Las Cruces, New Mexico and just east of the Rio Grande. The range is bounded by escarpments to the east and south. Doña Ana Peak is located in the southeastern part of the range, where it is prominent viewed from Las Cruces, and Summerford Mountain is prominent in the northeast corner of the range. The range is heavily eroded and largely barren of vegetation, exposing some 130 square kilometers (50 sq mi) of bedrock.[4]
Geologyedit
The mountains were formed in the late Tertiary as a fault block, which was uplifted on the east side along the Jornada fault and subsided to the west along the Robledo fault. This tilted the block by about 15 degrees towards the west. The northern part of the mountains is underlain by Pennsylvanian and Permiansedimentary rock, with a large syenitesill at Summerford Mountain. The middle section is Eocenelava flows and volcaniclastics (broken volcanic debris) of the Palm Park Formation,[4] which were erupted about 43 million years ago.[5] The southern part of the range exposes part of the Dona Ana caldera, which formed during the eruption of the Dona Ana Rhyolite about 36 million years ago. Beds of the Dona Ana Rhyolite ash flow tuff are up to 440 meters (1,440 ft) thick.[4] The Summerford Mountain sill was intruded somewhat later, at around 33 million years ago.[5]
Miningedit
The mountains contain limited volcanic-epithermal vein deposits. These are minerals deposited in fractures by hot groundwater associated with the Dona Ana caldera. Limited mining of these deposits took place during the early 1900s, producing just $5000 in copper, silver, and gold. There is limited potential for lead-zinc, gold skarn, and carbonate-hosted replacement ores at depth below the surface. Marble has been quarried in small amounts for crushed stone from the mountains.[6]
Referencesedit
^U.S. Geological Survey Geographic Names Information System: Doña Ana Mountains
^Dennis R. Jackson (1 January 2006). New Mexico. Globe Pequot Press. pp. 408–. ISBN978-0-7627-3132-9.
^U.S. Geological Survey Geographic Names Information System: Doña Ana Peak
^ abcSeager, William R.; Mack, Greg H. (2018). "Geology of the Dona Ana Mountains, south-central New Mexico: A summary" (PDF). New Mexico Geological Society Field Conference Series. 69: 71–81. Retrieved 30 June 2022.
^ abRamos, Frank C.; Heizler, Matthew T. (2018). "Age relationships of igneous rocks in the Doña Ana Mountains" (PDF). New Mexico Geological Society Field Conference Series. 69: 159–163. Retrieved 30 June 2022.
^McLemore, Virginia T. (2018). "Mineral resources of the Doña Ana mountains mining district, Doña Ana County, New Mexico" (PDF). New Mexico Geological Society Field Conference Series. 69: 203–206. Retrieved 30 June 2022.
doña, mountains, mountain, range, doña, county, mexico, highest, elevation, range, doña, peak, feet, meters, 45417, 78833, 45417, 78833, southeastern, base, contents, description, geology, mining, referencesdescription, editthe, small, rugged, mountain, range,. The Dona Ana Mountains are a mountain range in Dona Ana County New Mexico 1 The highest elevation in the range is Dona Ana Peak at 5 835 feet 1 779 meters 2 at 32 27 15 N 106 47 18 W 32 45417 N 106 78833 W 32 45417 106 78833 3 Southeastern base of the Dona Ana Mountains Contents 1 Description 2 Geology 3 Mining 4 ReferencesDescription editThe Dona Ana Mountains are a small rugged mountain range in the desert a few kilometers north of the city of Las Cruces New Mexico and just east of the Rio Grande The range is bounded by escarpments to the east and south Dona Ana Peak is located in the southeastern part of the range where it is prominent viewed from Las Cruces and Summerford Mountain is prominent in the northeast corner of the range The range is heavily eroded and largely barren of vegetation exposing some 130 square kilometers 50 sq mi of bedrock 4 Geology editThe mountains were formed in the late Tertiary as a fault block which was uplifted on the east side along the Jornada fault and subsided to the west along the Robledo fault This tilted the block by about 15 degrees towards the west The northern part of the mountains is underlain by Pennsylvanian and Permian sedimentary rock with a large syenite sill at Summerford Mountain The middle section is Eocene lava flows and volcaniclastics broken volcanic debris of the Palm Park Formation 4 which were erupted about 43 million years ago 5 The southern part of the range exposes part of the Dona Ana caldera which formed during the eruption of the Dona Ana Rhyolite about 36 million years ago Beds of the Dona Ana Rhyolite ash flow tuff are up to 440 meters 1 440 ft thick 4 The Summerford Mountain sill was intruded somewhat later at around 33 million years ago 5 Mining editThe mountains contain limited volcanic epithermal vein deposits These are minerals deposited in fractures by hot groundwater associated with the Dona Ana caldera Limited mining of these deposits took place during the early 1900s producing just 5000 in copper silver and gold There is limited potential for lead zinc gold skarn and carbonate hosted replacement ores at depth below the surface Marble has been quarried in small amounts for crushed stone from the mountains 6 References edit U S Geological Survey Geographic Names Information System Dona Ana Mountains Dennis R Jackson 1 January 2006 New Mexico Globe Pequot Press pp 408 ISBN 978 0 7627 3132 9 U S Geological Survey Geographic Names Information System Dona Ana Peak a b c Seager William R Mack Greg H 2018 Geology of the Dona Ana Mountains south central New Mexico A summary PDF New Mexico Geological Society Field Conference Series 69 71 81 Retrieved 30 June 2022 a b Ramos Frank C Heizler Matthew T 2018 Age relationships of igneous rocks in the Dona Ana Mountains PDF New Mexico Geological Society Field Conference Series 69 159 163 Retrieved 30 June 2022 McLemore Virginia T 2018 Mineral resources of the Dona Ana mountains mining district Dona Ana County New Mexico PDF New Mexico Geological Society Field Conference Series 69 203 206 Retrieved 30 June 2022 32 28 36 N 106 47 43 W 32 47667 N 106 79528 W 32 47667 106 79528 Retrieved from https en wikipedia org w index php title Dona Ana Mountains amp oldid 1154232277, wikipedia, wiki, book, books, library,
