San Juan Basin IV最新文献_第2页

Geometry of Nacimiento-Gallina fault system, northern New Mexico 新墨西哥州北部Nacimiento-Gallina断层系统的几何学

San Juan Basin IV Pub Date : 1900-01-01 DOI: 10.56577/ffc-43.103

L. Woodward, Michael C. Hultgren, David L. Crouse, Margaret A. Merrick

{"title":"Geometry of Nacimiento-Gallina fault system, northern New Mexico","authors":"L. Woodward, Michael C. Hultgren, David L. Crouse, Margaret A. Merrick","doi":"10.56577/ffc-43.103","DOIUrl":"https://doi.org/10.56577/ffc-43.103","url":null,"abstract":"The Nacimiento-Gallina fault system trends nonherly for about 110 km. separating the San Juan Basin and the Colorado Plateau from the Rocky Mountain foreland to the east. From south to north the Pajarito, Nacimiento, Gallina and Tierra Montafiosa faults comprise this system. The east-dipping Pajarito and Nacimiento fau lts bound the west side of the Nacimiento uplift and are characterized mainly by reverse separation. The Gallina and Tierra Montafiosa faults are nearly vertical and define the west boundary of the Gallina-Archuleta arch . Movement on the Gallina fault had both dip-slip and strike-slip components and displacement on the Montafiosa fault was essentially dip slip. This complicated eastern boundary of the Colorado Plateau has led to markedly different interpretations of its tectonic evolution. mainly because of previous lack of detailed geologic maps. Since the pioneering work of Vincent Kelley in the 1950s there has been general agreement that the Colorado Plateau underwent right shift with respect to the adjacent Rocky Mountain foreland in northern New Mexico prior to the Pajarito and Nacimiento faults rupturing the sedimentary cover. However, there has been considerable debate concerning the amount of right slip (as distinct from shift) along the NacimientoGallina fault system. Right shift in Precambrian basement rocks among the eastern margin of the Colorado Plateau in late Paleocene to mid-Eocene time created northwest-trending echelon fo lds in the overlying Phanerozoic strata. This was followed by development of a west-facing monocline that was cut by the Pajarito and Nacimiento reverse faults. As the San Juan Basin subsided it was differentially folded relative to the GallinaArchuleta arch. resulting in a component of strike slip along the Gallina fault. This differential folding resu lted in variable offset along the Gallina fault with nonmatching folds on opposite sides of the fault. The axes of the folds do not predate fault movement and therefore cannot be used to determine the amount of strike slip. Lack of piercing points along the Pajarito . Nacimiento and Gallina faults precludes precise calculations of the strike-slip component of movement. These discontinuous faults with relative ly short traces suggest that only minor amounts of right slip occurred along them. Thus, right shift of the Colorado Plateau dies out at the north end of the Gallina fault and displacement on the Tierra Montafiosa fault is principally dip slip. 103","PeriodicalId":325871,"journal":{"name":"San Juan Basin IV","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128528091","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}

引用次数: 7

Strandplain and deltaic depositional models for the Point Lookout Sandstone, San Juan Basin and Four Corners Platform, New Mexico and Colorado 新墨西哥州和科罗拉多州圣胡安盆地和四角台地Point Lookout砂岩的滨平原和三角洲沉积模式

San Juan Basin IV Pub Date : 1900-01-01 DOI: 10.56577/ffc-43.199

R. Wright-Dunbar, R. Zech, G. Crandall, D. Katzman

引用次数: 5

Coalbed methane from the Fruitland Formation, San Juan Basin, New Mexico 新墨西哥州圣胡安盆地果地组煤层气

San Juan Basin IV Pub Date : 1900-01-01 DOI: 10.56577/ffc-43.373

Douglas M. Bland

引用次数: 3

Stratigraphy and mammalian biostratigraphy of the Paleocene Nacimiento Formation, southern San Juan Basin 圣胡安盆地南部古新世Nacimiento组地层学与哺乳动物生物地层学

San Juan Basin IV Pub Date : 1900-01-01 DOI: 10.56577/ffc-43.265

T. Williamson, S. Lucas

{"title":"Stratigraphy and mammalian biostratigraphy of the Paleocene Nacimiento Formation, southern San Juan Basin","authors":"T. Williamson, S. Lucas","doi":"10.56577/ffc-43.265","DOIUrl":"https://doi.org/10.56577/ffc-43.265","url":null,"abstract":"The Paleocene Nacimiento Fonnation of the San Juan Basin is as much as 525 m thick and consists of nonmarine fluvial and lacustrine strata de posited in the Laramide San Juan Basin. South of Kutz Canyon, in the southern San Juan Bas in, we divide the Nacimiento Formation into (in ascending order) the Arroyo Chijuillita , Ojo Encino and Escavada Members . The Arroyo Chijuillita Member is as much as 134 m thick and consists mostly of drab gray, olive and ye llow bentoni tic mudstones, wh ite trough-crossbedded sandstone and minor beds of lignite. It confonnably overlies, grades into and interfingers with the unde rl ying Paleocene Ojo Alamo Sandstone . The base of the Ojo Encino Member is a resistant, trough-crossbedded sandstone complex he re named the Penistaja Bed . The Penistaja Bed is as much as 60 m thick and is overlain by as much as 122 m of Ojo Encino Member strata-mostly variegated red , green and black bentonitic mudstones and troughcrossbedded sandstones. Thin (up to 50 cm) beds of silcrete and th icker beds of trough-crossbedded sandstone characterize the overlying facavada Member, which is as much as 88 m th ick. The Cuba Mesa Member of the San Jose Fonnation unconfonnably overlies the Escavada Member of the Nacimiento Fonnation. Locally, this unconfonnity is a disconfonn ity, but across the southern San Juan Basin it is sl ightly angular. The three members of the Nacimiento Formation can be correlated on a li thologic basis across the southern San Juan Basin in surface measured sections and in the subsurface by geophysical well logs. These correlations also demonstrate that the two fossil mammal zones that yield Puercan faunas, the Ectoconus and Taenio/ab is zones, are disc rete, superposed assemblage zones. Fossili ferous zones that yield Puercan and Torrej,rn ian faunas are separated by a 45 m \"barren \" interval. The De/ratherium and Pantolambda zones of the Torrejonian are largely success ive but overlap to so me extent. Recent ly defined biochronologic zonation of the Puercan and Torrejon ian land mammal \"ages·· (Pu0Pu3, To l-To3) are based on the first appearance of key taxa and are only loosely based on biostratigraphic zonation. Biostrat igraphy of the Nacimiento Formation and correlation of Torrejonian fa unas of western North America suggest that Tetraclaenodon shou ld not be used to define the base of To2. Fossil mammals and magnetostratigraphy document that most of the Nacimiento Formation is of early Paleocene age (chrons 2927, Dan ian), al though its uppennost strata may be of earl y late Paleocene age (ch ron 26 , early Thanetian). The Paleocene mammals of the Nacimiento Format ion document a significant diversificat ion of paleoplacentals during the early Paleocene and continue to provide a standard by which the earl y Cenozoic diversi fication of the Eutheria is calibrated and interpreted . 265","PeriodicalId":325871,"journal":{"name":"San Juan Basin IV","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126878604","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}

引用次数: 18

Cretaceous-Eocene crocodilians from the San Juan Basin, New Mexico 新墨西哥州圣胡安盆地的白垩纪-始新世鳄鱼

San Juan Basin IV Pub Date : 1900-01-01 DOI: 10.56577/ffc-43.257

S. Lucas

引用次数: 13

First-day road log: From Cuba to La Ventana, San Luis, Cabezon, Mesa Portales, Mesa de Cuba and return to Cuba 第一天的行程记录:从古巴到拉文塔纳、圣路易斯、卡贝松、梅萨波尔塔莱斯、梅萨德古巴，然后返回古巴

San Juan Basin IV Pub Date : 1900-01-01 DOI: 10.56577/ffc-43.1

S. Lucas, T. Williamson, L. Smith, Bruce Wright-Dunbar, B. Kues, Gretchen K. Hoffman, A. Hunt, D. Love, V. McLemore, R. Hadley

引用次数: 1

Third-day road log: From Cuba to La Jara, Regina, Almagre Arroyo, Llaves, Gallina, Arroyo del Agua, Coyote, Youngsville and Abiquiu Dam

San Juan Basin IV Pub Date : 1900-01-01 DOI: 10.56577/ffc-43.53

S. Lucas, A. Hunt, T. Williamson, B. Kues, V. McLemore

引用次数: 0

Precious- and base-metal districts in Rio Arriba and Sandoval Counties, New Mexico 新墨西哥州里奥阿里巴和桑多瓦尔县的贵金属和贱金属区

San Juan Basin IV Pub Date : 1900-01-01 DOI: 10.56577/ffc-43.385

V. McLemore

引用次数: 3

Quaternary history and landscape development of some tributary drainage basins north of Chaco River 查科河以北部分支流流域的第四纪历史与景观发育

San Juan Basin IV Pub Date : 1900-01-01 DOI: 10.56577/ffc-43.391

L. Smith

{"title":"Quaternary history and landscape development of some tributary drainage basins north of Chaco River","authors":"L. Smith","doi":"10.56577/ffc-43.391","DOIUrl":"https://doi.org/10.56577/ffc-43.391","url":null,"abstract":"Topography in the northeastern tributary watersheds to the Chaco River is characterized by either subplanar alluvial surfaces or badland topography. The Alamo and Ah-shi-sle-pah watersheds contain extensive badland topography, whereas the Coal Creek and Tsaya basins are characterized by broad alluvial surfaces. Correlation of geomorphic surfaces between the drainage basins allows comparison of the responses each basin had to baselevel falls. The two oldest geomorphic surfaces extended beyond present-day drainage divides; drainage divides and the resulting proportions of sandstone and mudrock bedrock lithologies were inherited during the incision of these surfaces. Three younger geomorphic surfaces formed during periodic downcutting of the drainages. The character of drainage-basin evolution during regional dissection is a function of initial basin shape, relative relief of the drainage basin, distribution and proportion of mudrock to sandstone bedrock units, and distribution and preservation of sandy surficial deposits. Sandstone outcrop, elongate low-relief morphology, and accumulation of extensive sandy surficial deposits reduced sediment yield and downcutting in the Tsaya basin. Extensive badland development in the Ah-shi-sle-pah basin was augmented by the dominance of mudrock bedrock in the basin, a high drainage-basin relief ratio, and minimal preservation of sandy surficial deposits. INTRODUCTION SURFICIAL GEOLOGY The subtle topography in the northern tributaries to the Chaco River is interrupted locally by regions characterized by bedrock outcrop, high erosion rates and a badland topography. The Alamo, Coal Creek, Tsaya and Ah-shi-sle-pah drainage basins north of the Chaco River display a wide range of landforms and surficial processes characteristic of the region. The purposes of this paper are to describe the geomorphic history of the region and to discuss those geomorphic factors that have influenced drainage-basin evolution and the present distribution of the region's distinct landforms. The northern tributary drainage basins to the Chaco River are oriented across the strike of northeast-dipping Cretaceous and Paleogene sandstones, mudrocks, coal and minor conglomerate in the southwestern San Juan Basin (Fig. 1). Bedrock formations crop out at similar distances upstream from the Chaco River in each of the drainage basins. Although similar bedrock units crop out in each basin, variable thicknesses of bedrock units results in different proportions of sandstone-tomudrock among the study basins (Table 1). Many of the low relief, vegetated landforms in the northern tributary drainage basins of the Chaco River are capped by alluvium that is part of a topographically stepped Pleistocene and Holocene sequence (Fig. 4). Regional correlation of these deposits allows comparison of the differing downcutting histories of the basins. These alluvial deposits range in topographic position from present-day drainage divides to terraces to valley floors ","PeriodicalId":325871,"journal":{"name":"San Juan Basin IV","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132086662","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}

引用次数: 0

Tectonic dolomitization in the Gavilan Mancos oil pool, Rio Arriba County, New Mexico 新墨西哥州Rio Arriba县Gavilan Mancos油藏构造白云化特征

San Juan Basin IV Pub Date : 1900-01-01 DOI: 10.56577/ffc-43.123

A. Emmendorfer

引用次数: 4