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The effects of management practices on grassland birds—Greater Sage-Grouse (Centrocercus urophasianus) 管理措施对草原鸟类-大鼠尾草松鸡的影响

Professional Paper Pub Date : 1900-01-01 DOI: 10.3133/pp1842b

M. Rowland

引用次数: 1

Geology and assessment of undiscovered oil and gas resources of the Yenisey-Khatanga Basin Province 叶尼塞-哈坦加盆地未发现油气资源地质与评价

Professional Paper Pub Date : 1900-01-01 DOI: 10.3133/pp1824r

T. Klett, J. Pitman

{"title":"Geology and assessment of undiscovered oil and gas resources of the Yenisey-Khatanga Basin Province","authors":"T. Klett, J. Pitman","doi":"10.3133/pp1824r","DOIUrl":"https://doi.org/10.3133/pp1824r","url":null,"abstract":"The U.S. Geological Survey (USGS) assessed the potential for undiscovered oil and gas resources of the Yenisey-Khatanga Basin Province as part of the USGS Circum-Arctic Resource Appraisal. The province is situated between the Taimyr-Kara high (Kara block, Central Taimyr fold belt, and South Taimyr fold belt) and the Siberian craton. The two assessment units (AUs) defined for this study—the Khatanga Saddle AU and the Yenisey-Khatanga Basin AU were assessed for undiscovered, technically recoverable, conventional resources. The estimated mean volumes of undiscovered resources for the Yenisey-Khatanga Basin Province are ~5.6 billion barrels of crude oil, ~100 trillion cubic feet of natural gas, and ~2.7 billion barrels of natural-gas liquids, all north of the Arctic Circle. Yenisey-Khatanga Basin Province Province Boundary Definition The Yenisey-Khatanga Basin Province is situated between the Siberian craton to the south and the south slope of the Taimyr-Kara high to the north (figs. 1, 2). A northnorthwest-trending contractional-deformation zone called the Pakhsino-Begichev Arch, which is the westward extent of the Verkhoyansk-Olenek fold and thrust zone, forms the province’s east boundary (Mikulenko, 1983; Grebenyuk and others, 1988). The fold and thrust zone extends from the neighboring Lena-Anabar Basin to the south, northward through Bol’shoi Begichev Island in Khatanga Bay, to Cape Tsvetkov on the Taimyr Peninsula. The front of this fold and thrust zone extends westward to the Tigyano-Anabar horst (fig. 3), which might involve thrust faulting as part of its structural configuration (Drachev, 2002; G.F. Ulmishek, written commun., 2008). The Yenisey-Khatanga Basin is a northeastern structural arm of the West Siberian Basin (Baldin, 2004). Although the Mesozoic and Tertiary stratigraphic successions in the two basins have much in common, the basins are structurally separated by Mesozoic uplifts (Ulmishek, 2003). The Taimyr-Kara high, which bounds the northern margin of the Yenisey-Khatanga Basin, consists of the South and Central Taimyr fold belts in the south and the Kara block to the north (Ulmishek, 2003). The Yenisey-Khatanga Basin is a Mesozoic sag that formed above a late Permian and Early Triassic extensional-rift basin (Kontorovich and others, 1994). The Yenisey-Khatanga Basin is filled with 7 to 12 km of Mesozoic clastic rocks (Baldin and others, 1997). The Khatanga Saddle is a positive feature along the eastern margin of the Yenisey-Khatanga Basin. There, the Mesozoic section is thinnest (Grebenyuk and others, 1988), with a sedimentary thickness of no more than 1 to 2 km. Salt domes are present, in which the salt is presumed to be Devonian. A 2-km-thick sequence of Devonian and Carboniferous rocks is present in the northeastern part of the basin (Stepanenko, 1988). Petroleum Occurrence Petroleum was discovered in the Yenisey-Khatanga Basin Province in the early 1940s (1943–1945) in mainly Permian marine clastic rocks on the Khatanga Sadd","PeriodicalId":132462,"journal":{"name":"Professional Paper","volume":"5 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":"123636692","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: 2

A decade of geodetic change at Kīlauea’s summit—Observations, interpretations, and unanswered questions from studies of the 2008–2018 Halemaʻumaʻu eruption k<e:1>火山山顶的十年大地测量变化——对2008-2018年Halema夏威夷火山爆发的观察、解释和未解之谜的研究

Professional Paper Pub Date : 1900-01-01 DOI: 10.3133/pp1867g

M. Poland, A. Miklius, I. Johanson, K. Anderson

{"title":"A decade of geodetic change at Kīlauea’s summit—Observations, interpretations, and unanswered questions from studies of the 2008–2018 Halemaʻumaʻu eruption","authors":"M. Poland, A. Miklius, I. Johanson, K. Anderson","doi":"10.3133/pp1867g","DOIUrl":"https://doi.org/10.3133/pp1867g","url":null,"abstract":"On March 19, 2008, a small explosion heralded the onset of an extraordinary eruption at the summit of Kīlauea Volcano. The following 10 years provided unprecedented access to an actively circulating lava lake located within a region monitored by numerous geodetic tools, including Global Navigation Satellite System (GNSS), interferometric synthetic aperture radar (InSAR), tilt, and gravity. These datasets revealed a range of processes occurring on widely different timescales. Over years, pressure change within the summit magmatic system, determined from ground deformation and lava-lake surface height, seems to have been governed by broad variations in the rate of magma supply from the mantle to the volcano’s shallow magmatic system, as well as changes in the efficiency of East Rift Zone (ERZ) magma transport and eruption. Over weeks to months, intrusions at the summit and along the ERZ, where new eruptive vents commonly formed and intrusions were primed by extension from south-flank motion, were a result of short-term increases in magma supply or waning lava effusion from the ERZ. Waning lava effusion caused magma to back up behind the ERZ eruptive vent all the way to the summit. ERZ intrusions and eruptions caused rapid depressurization of the summit magmatic system, whereas summit intrusions resulted in complex deformation patterns as magma moved to and from two main sub-caldera storage areas. Over hours to days, pressure changes were caused by episodic deflationinflation (DI) events and possibly small summit intrusions, and deformation of the rim of the summit eruptive vent revealed instabilities that indicated an increased potential for collapse and minor explosive activity. Finally, over timescales of minutes to hours, gas pistoning, summit explosions, very-longperiod seismic events, and even the airborne eruptive plume had clear manifestations in geodetic datasets, providing insights into the causes and consequences of those processes. The diversity and quantity of geodetic observations shed important light on this exceptional and well-documented decade-long summit eruption and its accompanying phenomena, yet numerous questions remain about the causal mechanisms, physical processes, and magmatic conditions associated with eruptive and intrusive activity. Introduction The 2008–2018 summit eruption of Kīlauea Volcano, Hawaiʻi, provided an exceptional opportunity for research and discovery (Patrick and others, 2021). The eruptive vent, inside which an actively circulating lava lake was usually present, was easily accessible and located in the middle of a dense and comprehensive monitoring network within which new equipment could quickly be added. Moreover, this eruption was at a well-studied volcano where a century of research had established a strong framework for understanding the shallow magmatic plumbing system and associated volcanic activity. As a result, an outstanding record of observations was obtained (for example, Patrick and others,","PeriodicalId":132462,"journal":{"name":"Professional Paper","volume":"17 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":"114202775","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: 4

The effects of management practices on grassland birds—Lark Bunting (Calamospiza melanocorys) 管理措施对草原鸟类——百灵鸟狩猎的影响

Professional Paper Pub Date : 1900-01-01 DOI: 10.3133/pp1842ee

J. Shaffer, L. Igl, Douglas H. Johnson, M. L. Sondreal, Christopher M. Goldade, A. L. Zimmerman, Betty R. Euliss

引用次数: 1

The effects of management practices on grassland birds—McCown’s Longspur (Rhynchophanes mccownii) 管理措施对草原鸟类的影响——麦库恩长刺

Professional Paper Pub Date : 1900-01-01 DOI: 10.3133/pp1842y

J. Shaffer, L. Igl, Douglas H. Johnson, M. L. Sondreal, Christopher M. Goldade, Paul A Rabie, Travis L. Wooten, Betty R. Euliss

引用次数: 0

The effects of management practices on grassland birds—Willet (Tringa semipalmata inornata) 管理措施对草原鸟类的影响

Professional Paper Pub Date : 1900-01-01 DOI: 10.3133/pp1842i

J. Shaffer, L. Igl, Douglas H. Johnson, M. L. Sondreal, Christopher M. Goldade, B. Parkin, Jason P. Thiele, Betty R. Euliss

引用次数: 0

The effects of management practices on grassland birds—Greater Prairie-Chicken (Tympanuchus cupido pinnatus) 管理措施对草原鸟类-大草原鸡的影响

Professional Paper Pub Date : 1900-01-01 DOI: 10.3133/pp1842c

W. D. Svedarsky, J. Toepfer, R. L. Westemeier, R. Robel, L. Igl, J. Shaffer

引用次数: 1

The effects of management practices on grassland birds—Savannah Sparrow (Passerculus sandwichensis) 管理措施对草原鸟类——萨凡纳麻雀的影响

Professional Paper Pub Date : 1900-01-01 DOI: 10.3133/pp1842ff

D. A. Swanson, J. Shaffer, L. Igl

引用次数: 0

Geology and assessment of undiscovered oil and gas resources of the Lomonosov-Makarov Province, 2008 罗蒙诺索夫-马卡罗夫省未发现油气资源地质与评价，2008

Professional Paper Pub Date : 1900-01-01 DOI: 10.3133/pp1824cc

T. Moore, K. Bird, J. Pitman

{"title":"Geology and assessment of undiscovered oil and gas resources of the Lomonosov-Makarov Province, 2008","authors":"T. Moore, K. Bird, J. Pitman","doi":"10.3133/pp1824cc","DOIUrl":"https://doi.org/10.3133/pp1824cc","url":null,"abstract":"The Lomonosov-Makarov Province lies in the central Arctic Ocean and encompasses the northern part of the oceanic Amerasia Basin (Makarov and Podvodnikov Basins) and the adjoining Lomonosov Ridge and Siberian continental margins. The Amerasia Basin is thought to have been created in the Jurassic and Early Cretaceous by rotational rifting of the Alaska-Siberia margin away from the Canada margin about a pivot point in the Mackenzie Delta and an associated continental-scale transform fault along the Lomonosov Ridge. The province is bounded on the south by the Cretaceous Alpha-Mendeleev Ridge, an undersea ridge composed of plume-type volcanic rocks that obliquely crosses the Amerasia Basin, dividing it into northern and southern parts. The thickest passive-margin succession in the province lies along the Siberian margin, where sediments thin from a maximum thickness along the continental margin to less than 2 km in the basin. The northern part of the province consists of the Lomonosov Ridge, which was rifted away from the Eurasia Plate in the Paleocene during formation of the oceanic Eurasia Basin, creating an isolated, narrow, submerged, but highstanding microcontinent. This part of the province contains sediments that were shed from the Eurasia Plate in the Mesozoic and covered by pelagic and hemipelagic sediments in the Cenozoic, creating depositional successions with thicknesses ranging from about 1 to more than 5 km. This tectonic framework provides the basis for division of the province into four assessment units (AUs), including (1) Lomonosov Ridge AU, (2) Makarov Basin Margin AU, (3) Siberian Passive Margin AU, and (4) Makarov Basin AU. The Lomonosov Ridge and Makarov Basin Margin AUs compose a displaced part of the Cretaceous shelf and slope, respectively, of the Eurasia continental margin with a covering drape of pelagic Cenozoic sediments. The Siberian Passive Margin and Makarov Basin AUs represent the slope of the Siberian continental margin and adjoining basin plain deposits, respectively, deposited on oceanic crust of the northern Amerasia Basin. All of the AUs are entirely submarine and covered by the polar icecap, and consequently have not been explored for petroleum. Petroleum source rock units considered in the assessment of the province are mostly hypothetical, and include Triassic and Jurassic platformal marine shale units on the Lomonosov Ridge, and province-wide Lower Cretaceous synrift, Lower and Upper Cretaceous postrift, and Paleogene organic-rich shale intervals. The most prospective reservoirs and traps are envisioned to include base-of-slope turbiditefan complexes, slope channels and basins, extensional and growth fault structures, and other stratigraphic, structural, and composite trap features typically present on clastic-dominated continental passive margins. Because of concerns about reservoir quality in the Makarov Basin AU and the detrimental effect of Paleocene rifting in the Lomonosov Ridge AU, these units were not ","PeriodicalId":132462,"journal":{"name":"Professional Paper","volume":"1036 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":"123131936","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

The effects of management practices on grassland birds—Upland Sandpiper (Bartramia longicauda) 管理措施对草原鸟类——旱地矶鹬的影响

Professional Paper Pub Date : 1900-01-01 DOI: 10.3133/pp1842f

J. Shaffer, L. Igl, Douglas H. Johnson, Meghan F. Dinkins, Christopher M. Goldade, B. Parkin, Betty R. Euliss

引用次数: 0