P. Johnson, V. Grauch, P. Bauer, D. Koning, S. Timmons
P. S. Johnson, peggy@gis.nmt.edu, New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801; V. J. S. Grauch, U.S. Geological Survey, Geologic Division, Denver, Colorado 80225; P. W. Bauer, D. J. Koning, and S. W. Timmons, New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801
P. S. Johnson, peggy@gis.nmt.edu，新墨西哥州地质与矿产资源局，新墨西哥州矿业与技术研究所，索科罗87801;V. J. S. Grauch，美国地质调查局地质处，科罗拉多州丹佛80225;P. W. Bauer, D. J. Koning, S. W. Timmons，新墨西哥州地质矿产资源局，新墨西哥州矿业技术研究所，索科罗，新墨西哥州87801
{"title":"INFLUENCE OF BASEMENT STRUCTURE ON SHALLOW AQUIFER GEOCHEMISTRY IN THE RIO GRANDE RIFT, NORTHERN NEW MEXICO – EXAMPLES FROM THE SANTA FE AND PEÑASCO EMBAYMENTS OF THE ESPAÑOLA BASIN","authors":"P. Johnson, V. Grauch, P. Bauer, D. Koning, S. Timmons","doi":"10.56577/sm-2008.881","DOIUrl":"https://doi.org/10.56577/sm-2008.881","url":null,"abstract":"P. S. Johnson, peggy@gis.nmt.edu, New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801; V. J. S. Grauch, U.S. Geological Survey, Geologic Division, Denver, Colorado 80225; P. W. Bauer, D. J. Koning, and S. W. Timmons, New Mexico Bureau of Geology and Mineral Resources, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801","PeriodicalId":435999,"journal":{"name":"New Mexico Geological Society, 2008 Annual Spring Meeting, Proceedings Volume","volume":"318 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133287452","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}
J. Gilbert, T. Gill, D. Borrok, J. Gilbert, T. Gill, B. M. Frey, T. Hertel, M. Lane, M. Bleiweiss, C. Lehmann, D. Gay
{"title":"GEOCHEMISTRY AND POTENTIAL SOURCES OF THE JANUARY 7, 2008 SOUTHWESTERN NEW MEXICO “MILKY RAIN”","authors":"J. Gilbert, T. Gill, D. Borrok, J. Gilbert, T. Gill, B. M. Frey, T. Hertel, M. Lane, M. Bleiweiss, C. Lehmann, D. Gay","doi":"10.56577/sm-2008.878","DOIUrl":"https://doi.org/10.56577/sm-2008.878","url":null,"abstract":"","PeriodicalId":435999,"journal":{"name":"New Mexico Geological Society, 2008 Annual Spring Meeting, Proceedings Volume","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114758235","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":"MOLDING AND CASTING A REDONDASAURUS (ARCHOSAURIA: PHYTOSAURIDAE) SKULL USING ELEMENTS FROM THREE DIFFERENT ANIMALS","authors":"D. Ulibarri","doi":"10.56577/sm-2008.910","DOIUrl":"https://doi.org/10.56577/sm-2008.910","url":null,"abstract":"","PeriodicalId":435999,"journal":{"name":"New Mexico Geological Society, 2008 Annual Spring Meeting, Proceedings Volume","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115478212","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}
A. Szynkiewicz, L. Pratt, M. Glamoclija, C. H. Moore, E. Singer, D. Bustos
Pleistocene/Holocene gypsiferous lake sediments of the Tularosa Basin (White Sands area) and Estancia Basin were studied, using sulfur isotope methods, to try and identify primary sulfate sources and determine the hydrologic cycle during the Holocene tectonic evolution of these basins. Four sections of lake sediments taken from different sites in the White Sands area show wide variation in the δ 34 S values of sulfate minerals (from 2.2 to 13.8 ‰ vs. VCDT) suggesting different sulfate sources for and different sedimentary environments in the southern and northern parts of the study area. In the southern part, mixing process between sulfate-rich fluids originating from the dissolution of the Middle (10.9 to 12.3 ‰) and Lower (12.5 to 14.4 ‰) Permian strata is indicated by a steady increase of δ 34 S values (11.3 to 13.8 ‰) and linked to discharge of deeper-seated groundwater through fault-related fractures. This process was probably controlled by climate change and/or episodes of increased tectonic activity. Areas of groundwater discharge related to dissolution of Lower Permian strata were recognized based on alignments of gypsum-rich domes, visible on aerial photographs taken in October of 2007, with regional faults. The δ 34 S values of sediments from the northern part of the basin are dominated by sulfate (10.6 to 12.4 ‰) originating from the dissolution of the Middle Permian strata. However, three episodes of negative excursion of δ 34 S values (up to 2.2 ‰) suggest episodes of water influx with lower δ 34 S values that may be linked to the leaching of sulfate during nearsurface weathering of sulfides. Values of δ 34 S significantly higher (median 17.4 ‰) than those for sulfates derived from fluids that interacted with Lower Permian strata are found in sulfate-rich lake sediments from the Estancia Basin. This suggests the involvement of bacterial sulfate reduction processes. Higher organic carbon content in sediments from the Estancia Basin (median 0.46 %) compared to the White Sands area (median 0.07 %) is consistent with higher rates of bacterial sulfate reduction and the consequent overprinting of sulfur isotope signatures that would elucidate Holocene fluid flow paths.
{"title":"SULFUR ISOTOPE SIGNATURES IN GYPSIFEROUS SEDIMENTS OF THE TULAROSA AND ESTANCIA BASINS AS INDICATORS OF SULFATE SOURCES AND THE LOCAL HOLOCENE HYDROLOGIC CYCLE","authors":"A. Szynkiewicz, L. Pratt, M. Glamoclija, C. H. Moore, E. Singer, D. Bustos","doi":"10.56577/sm-2008.907","DOIUrl":"https://doi.org/10.56577/sm-2008.907","url":null,"abstract":"Pleistocene/Holocene gypsiferous lake sediments of the Tularosa Basin (White Sands area) and Estancia Basin were studied, using sulfur isotope methods, to try and identify primary sulfate sources and determine the hydrologic cycle during the Holocene tectonic evolution of these basins. Four sections of lake sediments taken from different sites in the White Sands area show wide variation in the δ 34 S values of sulfate minerals (from 2.2 to 13.8 ‰ vs. VCDT) suggesting different sulfate sources for and different sedimentary environments in the southern and northern parts of the study area. In the southern part, mixing process between sulfate-rich fluids originating from the dissolution of the Middle (10.9 to 12.3 ‰) and Lower (12.5 to 14.4 ‰) Permian strata is indicated by a steady increase of δ 34 S values (11.3 to 13.8 ‰) and linked to discharge of deeper-seated groundwater through fault-related fractures. This process was probably controlled by climate change and/or episodes of increased tectonic activity. Areas of groundwater discharge related to dissolution of Lower Permian strata were recognized based on alignments of gypsum-rich domes, visible on aerial photographs taken in October of 2007, with regional faults. The δ 34 S values of sediments from the northern part of the basin are dominated by sulfate (10.6 to 12.4 ‰) originating from the dissolution of the Middle Permian strata. However, three episodes of negative excursion of δ 34 S values (up to 2.2 ‰) suggest episodes of water influx with lower δ 34 S values that may be linked to the leaching of sulfate during nearsurface weathering of sulfides. Values of δ 34 S significantly higher (median 17.4 ‰) than those for sulfates derived from fluids that interacted with Lower Permian strata are found in sulfate-rich lake sediments from the Estancia Basin. This suggests the involvement of bacterial sulfate reduction processes. Higher organic carbon content in sediments from the Estancia Basin (median 0.46 %) compared to the White Sands area (median 0.07 %) is consistent with higher rates of bacterial sulfate reduction and the consequent overprinting of sulfur isotope signatures that would elucidate Holocene fluid flow paths.","PeriodicalId":435999,"journal":{"name":"New Mexico Geological Society, 2008 Annual Spring Meeting, Proceedings Volume","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130381320","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}
Stephen E. Teet, L. Crossey, J. Cleverly, J. Thibault
{"title":"RELATIONSHIPS BETWEEN TEMPORAL VARIATIONS IN GROUNDWATER CHEMISTRY AND MICROMETEOROLOGICAL FLUXES ALONG THE MIDDLE RIO GRANDE OF NEW MEXICO","authors":"Stephen E. Teet, L. Crossey, J. Cleverly, J. Thibault","doi":"10.56577/sm-2008.908","DOIUrl":"https://doi.org/10.56577/sm-2008.908","url":null,"abstract":"","PeriodicalId":435999,"journal":{"name":"New Mexico Geological Society, 2008 Annual Spring Meeting, Proceedings Volume","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128720291","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":"AQUEOUS GEOCHEMISTRY OF THE SPRINGS AND WELLS OF THE SEVILLETA NATIONAL WILDLIFE REFUGE: EVALUATING HYDROLOGIC PATHWAYS AND MICROBIOLOGY","authors":"A. J. Williams, L. Crossey, K. Karlstrom","doi":"10.56577/sm-2008.911","DOIUrl":"https://doi.org/10.56577/sm-2008.911","url":null,"abstract":"","PeriodicalId":435999,"journal":{"name":"New Mexico Geological Society, 2008 Annual Spring Meeting, Proceedings Volume","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115381966","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":"A 40AR/39AR SINGLE-CRYSTAL SANIDINE AGE FOR AN ALTERED VOLCANIC ASH BED FROM THE PALEOCENE NACIMIENTO FORMATION IN THE SOUTHERN SAN JUAN BASIN SHEDS NEW LIGHT ON THIS FORMATION’S SRATIGRAPHIC AND BIOCHRONOLOGIC ESSENCE","authors":"J. Fassett, M. Heizler","doi":"10.56577/sm-2008.875","DOIUrl":"https://doi.org/10.56577/sm-2008.875","url":null,"abstract":"","PeriodicalId":435999,"journal":{"name":"New Mexico Geological Society, 2008 Annual Spring Meeting, Proceedings Volume","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115504430","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}
Suzanne W. Braschayko, Shari W. Kelley, D. Stockli
{"title":"EXHUMATION HISTORY OF THE SAN JUAN BASIN","authors":"Suzanne W. Braschayko, Shari W. Kelley, D. Stockli","doi":"10.56577/sm-2008.864","DOIUrl":"https://doi.org/10.56577/sm-2008.864","url":null,"abstract":"","PeriodicalId":435999,"journal":{"name":"New Mexico Geological Society, 2008 Annual Spring Meeting, Proceedings Volume","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133213430","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":"PRECAMBRIAN BASEMENT OF THE DEFIANCE UPLIFT: POSSIBLE CORRELATION TO THE UNCOMPAHGRE QUARTZITE AND INFLUENCES OF BASEMENT FABRIC ON LATER TECTONISM","authors":"B. Dixon, K. Karlstrom","doi":"10.56577/sm-2008.870","DOIUrl":"https://doi.org/10.56577/sm-2008.870","url":null,"abstract":"","PeriodicalId":435999,"journal":{"name":"New Mexico Geological Society, 2008 Annual Spring Meeting, Proceedings Volume","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131701574","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}
Exposures at Pearson Mesa in the Duncan basin along the New Mexico-Arizona border have produced a diverse assemblage of late Pliocene (Blancan) vertebrates. The stratigraphic section at Pearson Mesa consists of more than 60 m of sandstones, mudstones, and sedimentary breccias of the Gila Group. Two distinct vertebrate faunas occur at Pearson Mesa: the early late Blancan Pearson Mesa Local Fauna (LF) is derived from the lower 15 m of the stratigraphic section and the latest Blancan Virden LF occurs in the upper 20 m of the section. The Pearson Mesa fauna consists of 25 species: 3 land tortoises ( Gopherus and two species of Hesperotestudo ); box turtle ( Terrapene ); colubrid snake; bird; and 19 mammals. Age-diagnostic mammals from the Pearson Mesa LF include: the ground sloth Paramylodon cf. P. garbanii ; the pocket gopher Geomys persimilis ; the cotton rat Sigmodon medius ; the three-toed horse Nannippus peninsulatus ; the one-toed horses Equus cf. E. cumminsii , and E. simplicidens ; and the peccary Platygonus bicalcaratus . The association of Paramylodon and Nannippus defines a restricted interval of time in the Blancan between the first appearance of South American immigrants (including Paramylodon ) in the southwestern US at ~3.0 Ma and the extinction of Nannippus at ~2.2 Ma. Magnetostratigraphy further constrains the age of the Pearson Mesa LF, with five normally-magnetized samples from the lower part of the section referred to the uppermost Gauss Chron (Chron 2An.1n; 2.58-3.04 Ma). Southwestern early late Blancan faunas (~2.6-3.0 Ma) correlative with Pearson Mesa include: Anapra, NM; Wolf Ranch and 111 Ranch, AZ; and Cita Canyon and Hudspeth, TX. A 10-m-thick sedimentary breccia overlying the Pearson Mesa LF lacks fossils and may represent a hiatus. The Virden LF consists of 22 species: toad; large Hesperotestudo ; Terrapene ; colubrid snake; lizard; two birds; and 15 mammals. A latest Blancan age (~1.8-2.2 Ma) for the Virden LF is indicated by the presence of the dwarf cotton rat Sigmodon minor and the small camelid Hemiauchenia gracilis , both restricted to latest Blancan faunas, and the association of the glyptodont Glyptotherium arizonae with the coyotelike canid Canis lepophagus . Southwestern latest Blancan faunas correlative with Virden include: La Union, NM and Curtis Ranch and San Simon, AZ.
{"title":"LATE PLIOCENE (BLANCAN) VERTEBRATE FAUNAS FROM PEARSON MESA, HIDALGO COUNTY, NEW MEXICO AND GREENLEE COUNTY, ARIZONA","authors":"G. Morgan, P. Sealey, S. Lucas","doi":"10.56577/sm-2008.892","DOIUrl":"https://doi.org/10.56577/sm-2008.892","url":null,"abstract":"Exposures at Pearson Mesa in the Duncan basin along the New Mexico-Arizona border have produced a diverse assemblage of late Pliocene (Blancan) vertebrates. The stratigraphic section at Pearson Mesa consists of more than 60 m of sandstones, mudstones, and sedimentary breccias of the Gila Group. Two distinct vertebrate faunas occur at Pearson Mesa: the early late Blancan Pearson Mesa Local Fauna (LF) is derived from the lower 15 m of the stratigraphic section and the latest Blancan Virden LF occurs in the upper 20 m of the section. The Pearson Mesa fauna consists of 25 species: 3 land tortoises ( Gopherus and two species of Hesperotestudo ); box turtle ( Terrapene ); colubrid snake; bird; and 19 mammals. Age-diagnostic mammals from the Pearson Mesa LF include: the ground sloth Paramylodon cf. P. garbanii ; the pocket gopher Geomys persimilis ; the cotton rat Sigmodon medius ; the three-toed horse Nannippus peninsulatus ; the one-toed horses Equus cf. E. cumminsii , and E. simplicidens ; and the peccary Platygonus bicalcaratus . The association of Paramylodon and Nannippus defines a restricted interval of time in the Blancan between the first appearance of South American immigrants (including Paramylodon ) in the southwestern US at ~3.0 Ma and the extinction of Nannippus at ~2.2 Ma. Magnetostratigraphy further constrains the age of the Pearson Mesa LF, with five normally-magnetized samples from the lower part of the section referred to the uppermost Gauss Chron (Chron 2An.1n; 2.58-3.04 Ma). Southwestern early late Blancan faunas (~2.6-3.0 Ma) correlative with Pearson Mesa include: Anapra, NM; Wolf Ranch and 111 Ranch, AZ; and Cita Canyon and Hudspeth, TX. A 10-m-thick sedimentary breccia overlying the Pearson Mesa LF lacks fossils and may represent a hiatus. The Virden LF consists of 22 species: toad; large Hesperotestudo ; Terrapene ; colubrid snake; lizard; two birds; and 15 mammals. A latest Blancan age (~1.8-2.2 Ma) for the Virden LF is indicated by the presence of the dwarf cotton rat Sigmodon minor and the small camelid Hemiauchenia gracilis , both restricted to latest Blancan faunas, and the association of the glyptodont Glyptotherium arizonae with the coyotelike canid Canis lepophagus . Southwestern latest Blancan faunas correlative with Virden include: La Union, NM and Curtis Ranch and San Simon, AZ.","PeriodicalId":435999,"journal":{"name":"New Mexico Geological Society, 2008 Annual Spring Meeting, Proceedings Volume","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114395689","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}
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