New Mexico Geology最新文献

{"title":"OSL dating of a lacustrine to fluvial transitional sediment sequence in Valle Toledo, Valles caldera, New Mexico","authors":"K. Lepper, S. Reneau, J. Thorstad, Boone Pickens, A. Denton","doi":"10.58799/nmg-v29n4.112","DOIUrl":"https://doi.org/10.58799/nmg-v29n4.112","url":null,"abstract":"Quaternary lacustrine deposits exist within several valleys in the Valles caldera in northcentral New Mexico . These deposits contain potentially valuable paleoclimatic records . We report OSL ages for a section of unconsolidated Quaternary sediments exposed in the southwest part of Valle Toledo within Valles caldera . The sequence represents the transition over time from lacustrine to fluvial deposition at the site . We present a stratigraphically coherent depositional chronology for the Valle Toledo section consistent with the available radiocarbon constraint based on analysis of bootstrapped dose distributions derived from data collected by IRSL MAAD procedures . The ages suggest the existence of a late Pleistocene lake in Valle Toledo from at least 48 .5 ka to ~44 ka, which is consider ably younger than age interpretations based on correlation to a >500 ka rhyolite dam across San Antonio Creek . This study helps to emphasize the need for additional research to decipher the geologic history of the intra-caldera lakes as well as to correlate the records of climate and environmental change among the lacustrine deposits within Valles caldera .","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71173210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Earthquake catalogs for New Mexico and bordering areas II: 1999-2004","authors":"A. Sanford, T. M. Mayeau, J. Schlue, R. Aster, L. Jaksha","doi":"10.58799/nmg-v28n4.99","DOIUrl":"https://doi.org/10.58799/nmg-v28n4.99","url":null,"abstract":"Earthquakes in New Mexico and bordering areas have been instrumentally located since 1962 at New Mexico Institute of Mining and Technology . Catalogs of these earthquakes for the period 1962 through 1998 were published in 2002 . This report extends the cata loging of earthquakes for the region through 2004 . For this 6-yr period 198 earthquakes with magnitudes of 2 . 0 or greater were located . An unusual feature of the seismicity 1999 through 2004 is that 63% of the earthquakes were concentrated in two swarms, one near water disposal wells on the western edge of the Dagger Draw oil field in southeastern New Mexico, and the other within and bordering the coalbed methane fields of the Raton Basin in northeastern New Mexico . We suggest that the proximity of these swarms to oil and gas fields may indicate that the earthquakes are induced by destabilization of the crust through production and waste disposal practices . The remaining 37% of the earthquakes 1999 through 2004 were concentrated near Socorro and west Texas . Except for the Socorro area, activity along the Rio Grande rift was low .","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71173428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Pennsylvanian crinoids of New Mexico","authors":"G. D. Webster, B. Kues","doi":"10.58799/nmg-v28n1.3","DOIUrl":"https://doi.org/10.58799/nmg-v28n1.3","url":null,"abstract":"Crinoids from each of the five Pennsylvanian epochs are described from 26 localities in New Mexico. The crinoid faunas occupied diverse shelf environments around many intermontane basins of New Mexico during the Pennsylvanian. The crinoids described here include 29 genera, 39 named species, and at least nine unnamed species, of which one genus and 15 named species are new. This report more than doubles the number of previously known Pennsylvanian crinoid species from New Mexico; 17 of these species also occur in midcontinent faunas. New Mexico Pennsylvanian crinoids exhibit greater species richness than Pennsylvanian faunas from the intermontane basins of Colorado, Utah, and Arizona and show some generic affinity with Great Basin Pennsyl-vanian faunas. They indicate seaway connections were open, although perhaps intermit-tently, throughout the Pennsylvanian between the intermontane basins of New Mexico and midcontinent basins in Texas and Oklahoma. New taxa introduced are: Lekobikocrinus n. gen., Aaglaocrinus bowsheri n. sp., Diphuicri-nus borgesae n. sp., Goleocrinus chronici n. sp., Metacromyocrinus cedroensis n. sp., M. szaboi n. sp., Ulocrinus manzanitaensis n. sp., Mosco-vicrinus ? rotundobasis n. sp., Endelocrinus globularus n. sp., Neoprotencrinus gutschicki n. sp., Euerisocrinus tijerasensis n. sp., Apograph-iocrinus rimosus n. sp., A. kietzkei n. sp., Metaffinocrinus noblei n. sp., Sciadiocrinus ornatus n. sp., and Paramphicrinus novamexi-canus n. sp.","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71172594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tectonic development of late Pleistocene (Rancholabrean) animal-trapping fissures in the Middle Jurassic Todilto Formation, north-central New Mexico","authors":"L. Rinehart, S. Lucas, G. Morgan, L. Woodward","doi":"10.58799/nmg-v28n3.84","DOIUrl":"https://doi.org/10.58799/nmg-v28n3.84","url":null,"abstract":"Open fissures in the Middle Jurassic Todilto Formation near San Ysidro, Sandoval County, New Mexico, trapped large late Pleistocene mammals whose articulated bones are preserved in the fissure fill. The fissures probably originated as the result of two tectonic events—compression that led to closed conjugate fractures during the Laramide orogeny followed by extension associated with development of the Rio Grande rift. During the later event the conjugate shears were opened and additional extensional, open fractures were formed.","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71173169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gallery of Geology, Fossil crinoid structural features","authors":"G. D. Webster, B. Kues","doi":"10.58799/nmg-v28n1.37","DOIUrl":"https://doi.org/10.58799/nmg-v28n1.37","url":null,"abstract":"","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71172684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Our Lady on the mountain - history, folklore, and geology of Magdalena Peak","authors":"R. Eveleth","doi":"10.58799/nmg-v28n2.43","DOIUrl":"https://doi.org/10.58799/nmg-v28n2.43","url":null,"abstract":"Today, 120 yrs after the editor of the Bullion waxed so eloquently, the Lady continues to keep up her silent watch. Her regal gaze has overseen the arrival and departure of countless centuries, the seemingly endless activities of humankind, the comings and goings of their enterprises and developments. She has observed much: the wanderings of the Native American Pueblo Indians and their Paleo-Indian ancestors before them; the arrival of the Spanish soon after 1540; the American prospectors and miners during and immediately after the Civil War; and the birth and death of North, Middle (Kelly), and South Camps at the foot of their mines. The mills, smelters, railroads, and towns built to serve the Kelly, Graphic, Waldo, and other prominent mines in the Magdalena mining district are gone now; they lived and died in little more than a centu","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71172749","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In memory of Christina Lochman-Balk 1907-2006","authors":"J. Love","doi":"10.58799/nmg-v28n3.88","DOIUrl":"https://doi.org/10.58799/nmg-v28n3.88","url":null,"abstract":"","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71173195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Stratigraphic analysis of the Yates No. 2 La Mesa Well and implications for southern Espanola Basin tectonic history","authors":"Caroline Myer, Gary A. Smith","doi":"10.58799/nmg-v28n3.75","DOIUrl":"https://doi.org/10.58799/nmg-v28n3.75","url":null,"abstract":"The Neogene Espanola Basin of the Rio Grande rift has been alternatively interpreted as overlapping an Eocene Laramide basin or as representing inversion of a Laramide uplift. The stratigraphy of the rocks penetrated by the Yates #2 La Mesa well near Santa Fe, New Mexico, is essential to the interpretation of the subsurface geology and to resolving this controversial aspect of the tectonic history of the basin. Petrographic analysis of 46 thin sections from well cuttings, as well as general examination of cuttings and geophysical logs, addresses these problems. Limestone and clastic sedimentary rocks overlying Precambrian granite were previously interpreted as Tertiary basin fill, but petrographic examination of limestone cuttings reveals many fragments with diagnostic late Paleozoic marine fossils. Along with the absence of typical local Eocene red beds, the Paleozoic fossils require reassignment of this 462-m-thick (1,516-ft-thick) interval to the Pennsylvanian section. Volcanic and volcaniclastic rocks overlying the Paleozoic strata were previously assigned to the Oligocene Espinaso Formation. Only the lower 307 m (1,007 ft) of this succession consist of latitic detritus characteristic of the Espinaso Formation. Mafic lava flows and arkosic sedimentary strata compose the upper 318 (1,043 ft) m of the volcanic interval. The mafic lava flows correlate to upper Oligocene‐lower Miocene basalts and basanites seen in nearby outcrops, and the sedimentary layers resemble overlying rift-basin fill. The results of this study support formation of the Espanola Basin by inversion of a Laramide uplift. The well cuttings provide no evidence for Eocene syn-Laramide basinfill sedimentary deposits. Oligocene volcaniclastic rocks buried the uplift that was denuded of all Phanerozoic cover strata except for a partial Paleozoic section. Basalts erupted onto an alluvial surface that was already accumulating rift-basin fill.","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71173120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In memory of Walter A. Mourant, 1913-2005","authors":"J. Shomaker","doi":"10.58799/nmg-v27n1.22","DOIUrl":"https://doi.org/10.58799/nmg-v27n1.22","url":null,"abstract":"","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71172253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Helium in New Mexico--geologic distribution, resource demand, and exploration possiblities","authors":"R. Broadhead","doi":"10.58799/nmg-v27n4.93","DOIUrl":"https://doi.org/10.58799/nmg-v27n4.93","url":null,"abstract":"Helium gas has been produced in New Mexico since 1943. Production has been from eight oil and gas fields located on the Four Corners platform of northwestern New Mexico. Almost 950 MMCF (million cubic feet) helium has been produced from reservoirs of Permian, Pennsylvanian, Mississippian, and Devonian age on the Four Corners platform in San Juan County. In northwest New Mexico, elevated levels of helium in natural gases occur not only in Paleozoic reservoirs on the Four Corners platform but also in Paleozoic reservoirs in the deeper parts of the San Juan Basin located east of the Four Corners platform. The orthogonal sets of high-angle faults that offset Precambrian basement throughout the deeper parts of the San Juan Basin acted as migration pathways that transmitted helium from its basement source into overlying Paleozoic reservoirs. Helium has not been extracted from produced gases in the New Mexico part of the Permian Basin where the concentration of helium in most reservoir gases is significantly less than 0.1%. However, gases with helium contents ranging from 0.3 to almost 1.0% occur in Pennsylvanian and Permian reservoirs along the northwest flank of the basin. The helium appears to have originated by radiogenic decay of uranium and thorium in Precambrian granitic rocks and migrated vertically into Pennsylvanian and Permian reservoirs through regional, high-angle, strike-slip faults. Known accumulations of helium-rich gases are located near these faults. Lower Permian evaporites provide vertical fault seals. In this area, lower and middle Paleozoic strata are only a few hundred feet thick, resulting in short vertical migration distances between the Precambrian source and helium-bearing reservoirs. The fault trends define exploration fairways. Other basins and areas in New Mexico are characterized by helium-rich gases and are of significant exploratory interest. These areas include the Chupadera Mesa region of eastern Socorro and western Lincoln Counties in the central part of the state, the Tucumcari Basin in the east-central part of the state, and a wide region across Catron and southern Cibola Counties in the westcentral part of the state. Elevated levels of helium are found in Pennsylvanian and Permian gases in these areas.","PeriodicalId":35824,"journal":{"name":"New Mexico Geology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71172581","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}