Relevant bibliographies by topics / Basal deposits

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Basal deposits'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Basal deposits"

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DOS SANTOS, MANOEL LUIZ, and JOSÉ CANDIDO STEVAUX. "Fáceis e associações dos depósitos rudáceos na rudáceos na Bacia do Rio Paraná em seu curso superior: uma tentativa de classificação." Pesquisas em Geociências 28, no. 2 (December 31, 2001): 171. http://dx.doi.org/10.22456/1807-9806.20284.

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This paper proposes a classification of gravel deposits in the upper Paraná River Basin based on their genesis, sedimentary facies and depositional processes. They were classified in four types: a) Upper slope oligomictic gravel (Fine and coarse-sand associations) – this deposit is associated with the origin of hydrographic basin during the Tertiary; b) Middle slope oligomictic gravel – It constitutes colluvial deposits related to present topography; c) Lower slope oligomictic gravel – this deposit is associated with present river valley; d) Polymictic gravel – deposited during the Pleistocene
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Feng, Jin-Liang, Jian-Ting Ju, Feng Chen, Zhao-Guo Hu, Xiang Zhao, and Shao-Peng Gao. "Identification of a late Quaternary alluvial–aeolian sedimentary sequence in the Sichuan Basin, China." Quaternary Research 85, no. 2 (March 2016): 279–89. http://dx.doi.org/10.1016/j.yqres.2016.01.006.

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The late Quaternary sedimentary sequence in the northwestern part of the Sichuan Basin consists of five lithological units and with increasing depth include the: Chengdu Clay; Brown Clay; Red Clay; Sandy Silt; and basal Muddy Gravel. The genesis, provenance and age of the sediments, as well as the possible presence of hiatuses within this sequence are debated. Measurements of grain-size, magnetic susceptibility, quartz content, quartz δ18O values, element composition, and Sr–Nd isotopic concentrations of samples from a typical sedimentary sequence in the area provides new insights into the gen
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Katamura, Fumitaka, Masami Fukuda, Nikolai Petrovich Bosikov, and Roman Vasilievich Desyatkin. "Charcoal records from thermokarst deposits in central Yakutia, eastern Siberia: Implications for forest fire history and thermokarst development." Quaternary Research 71, no. 1 (January 2009): 36–40. http://dx.doi.org/10.1016/j.yqres.2008.08.003.

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AbstractMacroscopic charcoal records from a thermokarst lake deposit in central Yakutia, eastern Siberia, were used to reconstruct the history of forest fires and investigate its relationship to thermokarst initiation. High accumulation rates of charcoal and pollen were coincident in the basal deposits of the thermokarst lake, which suggests that both were initially deposited on the forest floor and subsequently reworked and accumulated in the thermokarst depression. High charcoal and pollen accumulation rates in the basal deposits, dating to 11,000–9000 cal yr BP, also indicate that the therm
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Wellman, Charles H. "Palynology of the ‘Lower Old Red Sandstone’ at Glen Coe, Scotland." Geological Magazine 131, no. 4 (July 1994): 563–66. http://dx.doi.org/10.1017/s0016756800012176.

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Abstract‘Lower Old Red Sandstone’ deposits preserved by cauldron subsidence at Glen Coe, Scotland have hitherto lacked secure biostratigraphical age constraint. A sporomorph assemblage recovered from basal sediments of these deposits permits age determination, despite being highly carbonized. The sporomorph assemblage is correlated with the micrornatus-newportensis Sporomorph Assemblage Biozone, indicating a late early-early late Lochkovian age (early Devonian). Sporomorph assemblages from basal sediments of the ‘Lower Old Red Sandstone’ sequence at nearby Lorne, a suggested correlative of the
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Yang, Ya. "Study on Sedimentary Facies of the Lower Eocene Basal Deposits in the Southeastern Part of the Jiyang Depression, Bohai Bay Basin, China." Mobile Information Systems 2022 (September 5, 2022): 1–8. http://dx.doi.org/10.1155/2022/2959031.

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Based on the analysis of cores, logging, and seismic data, this paper identifies the sedimentary facies of the basal deposits from the lower Eocene in the southeastern part of the Jiyang Depression and studies its depositional law. On this basis, a sedimentary model of the basal deposits is established. The basal sediments of the lower Eocene in the Jiyang Depression are mainly red, brown, gray, and variegated clastic rocks, which are mainly divided into Kongdian and lower Shahejie-4 Formation. It is considered that the climate during the depositional period was relatively arid, and the deposi
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Sobiesiak, Matheus S., Ben Kneller, G. Ian Alsop, and Juan Pablo Milana. "Styles of basal interaction beneath mass transport deposits." Marine and Petroleum Geology 98 (December 2018): 629–39. http://dx.doi.org/10.1016/j.marpetgeo.2018.08.028.

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VILAS BÔAS, GERALDO S., FLÁVIO J. SAMPAIO, and ANTONIO M. S. PEREIRA. "The Barreiras Group in the Northeastern coast of the State of Bahia, Brazil: depositional mechanisms and processes." Anais da Academia Brasileira de Ciências 73, no. 3 (September 2001): 417–27. http://dx.doi.org/10.1590/s0001-37652001000300010.

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The Barreiras Group is a Miocene to Lower Pleistocene continental terrigenous sedimentary deposit exhibiting a large occurrence along the Brazilian coast. In the Conde region, located in the northeastern part of the State of Bahia, the sedimentological characteristics of these sediments are indicative of a deposition as gravelly and sandy bed load in braided fluvial systems, related to alluvial fans, under an arid to semi-arid climate. The basal portion of the group is dominated by a gravelly-sandy lithofacies deposited by debris flows and pseudoplastic debris flows, with lesser occurrences of
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Song, Delu, Imran Mohammed, Rupak Bhuyan, Takashi Miwa, Allison Lesher Williams, Damodar Gullipalli, Sayaka Sato, Ying Song, Joshua L. Dunaief, and Wen-Chao Song. "Retinal Basal Laminar Deposits in Complement fH/fP Mouse Model of Dense Deposit Disease." Investigative Opthalmology & Visual Science 59, no. 8 (July 10, 2018): 3405. http://dx.doi.org/10.1167/iovs.18-24133.

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Satti, Mohamed B., and John G. Azzopardi. "Amyloid deposits in basal cell carcinoma of the skin." Journal of the American Academy of Dermatology 22, no. 6 (June 1990): 1082–87. http://dx.doi.org/10.1016/0190-9622(90)70156-c.

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Passchier, Sandra, Anja L. L. M. Verbers, Frederik M. Van Der Wateren, and Frans J. M. Vermeulen. "Provenance, geochemistry and grain-sizes of glacigene sediments, including the Sirius Group, and Late Genozoic Glaciol history of the southern Prince Albert Mountains, Victoria Land, Antarctica." Annals of Glaciology 27 (1998): 290–96. http://dx.doi.org/10.3189/1998aog27-1-290-296.

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The southern Prince Albert Mountains, between David and Mawson Glaciers (75°30' to 76°S) in Victoria Land, Antarctica, comprise a series of nunataks with elevations ranging from 800m near the coast to 2300 m ~130 km inland. Geochemical and grain-size analyses of tills from these nunataks reveal three major groups of deposits: (1) coarse to medium sandy tills, found on Glaciolly streamlined summit plateaus of Kirk-pat rick Basalt above 2000 ma.s.l.., with geochemical compositions very similar to those of the underlying jurassic Kirkpatrick Basalt; (2) bimodal silty and sanely tills of the Siriu
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Dissertations / Theses on the topic "Basal deposits"

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Cherepanoff, Svetlana. "Age-related macular degeneration: histopathological and serum autoantibody studies." University of Sydney, 2008. http://hdl.handle.net/2123/2464.

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Doctor of Philosophy (PhD)<br>BACKGROUND: The accumulation of abnormal extracellular deposits beneath the retinal pigment epithelium characterises the pathology of early age-related macular degeneration. However, the histopathological threshold at which age-related changes become early AMD is not defined, and the effect of each of the deposits (basal laminar deposit and membranous debris) on disease progression is poorly understood. Evidence suggests that macrophages play a key role in the development of AMD lesions, but the influence of basal laminar deposit (BLamD) and membranous debris on t
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Millett, John Michael. "Geochemical stratigraphy and correlation within the Faroe Islands Basalt Group with developments in the analysis of large igneous province deposits from well data." Thesis, University of Aberdeen, 2014. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=215221.

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Hussain, Mohammed Ershad. "Capital Regulation, Risk-Taking, Bank Lending and Depositor Discipline." ScholarWorks@UNO, 2007. http://scholarworks.uno.edu/td/568.

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In this dissertation we investigate different aspects of capital regulations and their impact on the behavior of commercial banks. In chapter two, we foucs on the impact of capital regulations on risk-taking of commercial banks in developed and developoing countries separately and togahter. We find that such regulations indeed reduce the risk taking of commercial banks. At the same time, we examine the relationship between capital ratios and risk taking. In line with previous literature, we find that this ratio is negative also. Further examinations including the degree of liberalization and t
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McKinley, Bradley Scott Mason. "Geological characteristics and genesis of the Kemess North porphyry Au-Cu-Mo deposit , Toodoggone district, north-central British Columbia, Canada." Thesis, University of British Columbia, 2006. http://hdl.handle.net/2429/2293.

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The Kemess North porphyry Au-Cu-Mo deposit (300 Mt resource @ 0.30 g/t Au and 0.16% Cu)i s situated in the Toodoggone district, along the eastern margin of the Stikinia terrane in British Columbia. Mineralization is genetically related to the ca. 202 Ma, moderately SE-plunging, Kemess North diorite and is also hosted by proximal Takla Group basalt country rock. The nearby 202.7 ± 1.9 Ma Sovereign diorite has a comparable emplacement age, mineralogy, and chemistry to the Kemess North diorite, but is unmineralized. Toodoggone Formation volcaniclastic rocks (199.1 ± 0.3 Ma) crop out as prominent
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Matamba, Itani. "Estimating the cost of deposit insurance for a commercial bank following an optimal investment strategy." University of Western Cape, 2020. http://hdl.handle.net/11394/7845.

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>Magister Scientiae - MSc<br>Commercial banks play a dominant role in facilitating the economic growth of a country by acting as an intermediary between the de cit spending unit (borrowers) and the surplus spending unit (lenders). In particular, they transform short-term deposits into medium and long-term loans. Due to their important role in the economy and the nancial system as a whole, commercial banks are subject to high regulation standards in most countries. According to an international set of capital standards known as the Basel Accords, banks are required to hold a minimum leve
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Hasten, Zachary Eugene Levi. "Mid-Miocene magmatism in the Owyhee Mountains, ID: origin and petrogenesis of volcanic rocks in the Silver City district." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/14940.

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Master of Science<br>Department of Geology<br>Matthew E. Brueseke<br>Previous studies of the northern Great Basin have indicated that mid-Miocene epithermal gold and silver ore deposits distributed regionally are temporally related to the magmatic activity associated with the onset of widespread extension and the Yellowstone hotspot (Saunders and Crowe, 1996; Kamenov et al., 2007). This study is focused on the volcanic rocks and ore deposits from the Silver City district (SCD), ID to address the petrogenesis and magmatic evolution that was influential in forming local precious metal deposits.
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Romanova, Irina. "Volcanology and geochemistry of the Cretaceous volcaniclastic deposits and basalts from Ori Massif, Shatsky Rise Oceanic Plateau." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/108162/1/Irina_Romanova_Thesis.pdf.

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This study enhanced our understanding of the origin and evolution of Ori Massif, Shatsky Rise Oceanic Plateau. Key findings are: 1. Volcaniclastic deposits were formed by Surtseyan style phreatomagmatic activity, suggesting that the summit of Ori Massif was shallow-marine to near sea-level; 2. Basaltic fragments from the volcaniclastic deposits provide further evidence for geochemical variation of magmas from Ori Massif and indicate a significant involvement of depleted mantle in its source; 3. Element mobility during seawater alteration of basalts from Ori and Tamu Massifs depends on stratigr
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Corradini, Urs. "Pastorale Dienste im Bistum Basel : Entwicklung und theologische Konzeption nach dem Zweiten Vatikanischen Konzil /." Fribourg : Academic Press, 2008. http://deposit.d-nb.de/cgi-bin/dokserv?id=3164781&prov=M&dok_var=1&dok_ext=htm.

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Chadwick, Warren. "A study of the New Basel Capital Accord and its impact on South Africa and other emerging markets." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52710.

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Thesis (MBA)--Stellenbosch University, 2002.<br>ENGLISH ABSTRACT: The new Basel Capital Accord is intended to align capital adequacy of banks more closely with the key components of banking risk and to provide incentives for banks to improve their risk measurement and management capabilities. This has important implications for banks, particularly in the area of credit risk management. The purpose of this study is to take an in-depth look at the implications for banks in the area of credit risk management and the choice of approach (i.e. standardised versus internal ratings based approac
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Buba, Caroline. "Basel II Wandel in der Kreditvergabe ; Auswirkungen auf die Mittelstandsfinanzierung." Saarbrücken VDM, Müller, 2006. http://deposit.d-nb.de/cgi-bin/dokserv?id=2871709&prov=M&dok_var=1&dok_ext=htm.

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Books on the topic "Basal deposits"

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A, Shcheka S., ред. Gidrotermalʹnye izmenenii͡a︡ bazalʹtov v Tikhom okeane i metallonosnye otlozhenii͡a︡: Po materialam glubokovodnogo burenii͡a︡. Moskva: Izd-vo "Nauka", 1986.

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Monetary and Capital Markets Department Staff International Monetary Fund. Malaysia: Publication of Financial Sector Assessment Program Documentation--Detailed Assessment of Basel Core Principles for Effective Banking Supervision. International Monetary Fund, 2013.

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Fund, International Monetary. Malaysia: Publication of Financial Sector Assessment Program Documentation--Detailed Assessment of Basel Core Principles for Effective Banking Supervision. International Monetary Fund, 2013.

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Staff, International Monetary Fund. Malaysia: Publication of Financial Sector Assessment Program Documentation--Detailed Assessment of Basel Core Principles for Effective Banking Supervision. International Monetary Fund, 2013.

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Book chapters on the topic "Basal deposits"

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Naldrett, Anthony J. "Ore deposits associated with flood basalt volcanism." In Magmatic Sulfide Deposits, 137–278. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08444-1_4.

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Naldrett, Anthony J. "Erratum to: Ore deposits associated with flood basalt volcanism." In Magmatic Sulfide Deposits, 728. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-662-08444-1_11.

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Li, Houmin, Jingwen Mao, Yuchuan Chen, Denghong Wang, Changqing Zhang, and Hong Xu. "Epigenetic hydrothermal features of the Emeishan basalt copper mineralization in NE Yunnan, SW China." In Mineral Deposit Research: Meeting the Global Challenge, 149–52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27946-6_39.

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Bing-Quan, Zhu, Zhang Zheng-wei, and Hu Yao-Guo. "Controls of magmatism and hydrothermal activities on mineralization in the Emeishan flood basalt Province, SW China." In Mineral Deposit Research: Meeting the Global Challenge, 77–79. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/3-540-27946-6_20.

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Matoshko, Andrei V. "Dnieper Glaciation — basal till deposits." In Glacial Deposits in North-East Europe, 231–39. CRC Press, 2020. http://dx.doi.org/10.1201/9781003077695-34.

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Mountaj, Sara, Hassan Mhiyaoui, Toufik Remmal, Samira Makhoukhi, and Fouad El Kamel. "Study of Monogenic Volcanism in a Karstic System: Case of the Maar of Lechmine n’Aït el Haj (Middle Atlas, Morocco)." In Volcanoes - Updates in Volcanology [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94756.

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The Lechmine n’Aït el Haj maar (LNH) is a mixed phreatomagmatic-strombolian vent located in the Causse of the Middle Atlas. The application of tephrostratigraphic, and geophysical studies to the volcaniclastic deposits allowed interpreting the volcanic dynamics of this volcano set up during the Quaternary. Pyroclastic deposits allow us to understand the chronology of the eruptions. These are organized in four eruptive phases. The basal sequences are phreatomagmatic, followed by a strombolian unit. The last activity of LNH is phreatomagmatic. The structural analysis revealed a localized distension signed by fracture geometry, the mixed nature of the volcanism, tectonic markers, and the mechanisms of syn-eruptive tectonics. This subsidence, controlled by the NW-SE to WNW-ESE directions tends towards a strike-slip regime fault NE–SW during the phreatomagmatic-strombolian transition. The latter is favored by the position of the LNH volcano on the path of faults of cryptokarstic origin. The LNH maar is one of numerous well preserved monogenic volcanoes of the Causse of the Middle Atlas. The appropriation of this geoheritage is very important for tourism and territorial development of the region.
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Morsilli, Michele, Alex Hairabian, Jean Borgomano, Sergio Nardon, Erwin Adams, and Guido Bracco Gartner. "A journey along the Gargano promontory (Southern Italy): The Late Jurassic to Eocene Apulia Carbonate Platform evolution." In Field guides to exceptionally exposed carbonate outcrops, 395–480. International Association of Sedimentologists, 2021. http://dx.doi.org/10.54780/iasfg3/08.

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The Apulia Carbonate Platform (ACP) is one of the most extensive isolated carbonate domains of the Tethyan Ocean, which persisted for a long span of time (Triassic to Miocene). The Late Jurassic to Eocene evolution of the ACP margin was characterised by different growth dynamics including progradation, aggradation and retrogradation; and by fundamental changes in platform profile. These changes were associated with significant fluctuations through time of the rates of sediment deposition, bypass and erosion along the slope, resulting in great variety in terms of deep-water resedimented carbonate facies and associated stratal architecture. In the Gargano Promontory (Southern Italy), also known as the spur of the Italian boot, the outcrops offer an easy access to a little deformed, complete platform-to-basin transect along the ACP margin. The different evolutionary stages of the slope and base-of-slope domains are well-exposed and can be directly related to the morphological evolution of the platform margin as well as to fluctuations of neritic carbonate production in response to tectonic, eustatic or oceanographic controls. The carbonate rocks of the Gargano Promontory are relevant analogues of some important subsurface reservoirs and plays of the Periadriatic domain, especially in the Adriatic offshore and below the Southern Apennines thrust-belt. This field itinerary includes four excursions with key stops providing an overview of lithofacies, stratal architecture and depositional processes from inner platform to basin environments. The selected outcrops are windows on the in-situ and remobilised sedimentary products of different carbonate factories that colonised the ACP margin through time, i.e. stromatoporoids in the Upper Jurassic-basal Cretaceous, rudists in the Cretaceous and large benthic foraminifera and corals in the Eocene. The excursions are organised chronologically focusing on: (1) Upper Jurassic – basal Cretaceous slope to basin transition, (2) Lower Cretaceous inner platform succession, (3) mid-Upper Cretaceous slope/base-of-slope deposits; and (4) middle Eocene shallow-marine to deep-marine deposits.
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Dubé, Benoît, Patrick Mercier-Langevin, John Ayer, Jean-Luc Pilote, and Thomas Monecke. "Chapter 3: Gold Deposits of the World-Class Timmins-Porcupine Camp, Abitibi Greenstone Belt, Canada." In Geology of the World’s Major Gold Deposits and Provinces, 53–80. Society of Economic Geologists, 2020. http://dx.doi.org/10.5382/sp.23.03.

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Abstract The Timmins-Porcupine camp, with &amp;gt;2,190 metric tons Au (70.5 Moz) produced between 1906 and 2019, is the world’s largest Archean orogenic gold camp. The gold deposits of the camp are distributed over ~50 km of strike length along the Destor-Porcupine fault zone. This includes the world-class Hollinger-McIntyre and Dome deposits, which represent archetypal examples of large orogenic quartz-carbonate gold systems. The Dome deposit, where the ore is centered on a folded unconformity between Tisdale volcanic rocks and Timiskaming sedimentary units, also illustrates the spatial relationship between large gold deposits and a regional unconformity. Ore-forming hydrothermal activity in the camp spanned a prolonged period of time, as illustrated by early-stage, low-grade ankerite veins formed between ca. 2690 and 2674 Ma. This was prior to or very early relative to the development of the regional unconformity and sedimentation of the Timiskaming assemblage, and subsequent main-stage gold deposition. The bulk of the gold in the district is younger than the Three Nations Formation of the upper part of the Timiskaming assemblage (i.e., ≤2669 ± 1 Ma) and was deposited syn- to late-main phase of shortening (D3) in the Timmins-Porcupine camp from about 2660 to 2640 ± 10 Ma. The early carbonatization represents a significant early-stage hydrothermal event in the formation of large structurally controlled gold deposits such as Dome and illustrates the protracted nature of the large-scale CO2-rich metasomatism occurring before and during gold deposition. Ores in the Timmins-Porcupine camp mainly consist of networks of steeply to moderately dipping fault-fill quartz-carbonate ± tourmaline ± pyrite veins and associated extensional, variably deformed, shallowly to moderately dipping arrays of sigmoidal veins hosted in highly carbonatized and sericitized rocks and formed during main regional shortening (D3). In contrast, at the Timmins West mine, the Thunder Creek and 144 GAP deposits are early- to syn-Timiskaming intrusion-associated deposits that slightly predate to overlap the main phase of D3 horizontal shortening in which the associated intrusions mainly played a passive role as an older mechanical and chemical trap rock. The formation of the gold deposits of the Timmins-Porcupine camp is due to several key factors. The Destor-Porcupine fault zone represents a deeply rooted first-order structure and tapped auriferous metamorphic fluids and melts from the upper mantle-lower crust. The fault zone has channeled large volumes of auriferous H2O-CO2-rich fluids to the upper crust late in the evolution of the belt. Several of the gold deposits of the camp are spatially associated with the regional Timiskaming unconformity. The current level of erosion is deep enough to expose the unconformity and to maximize the chance of discovering the quartz-carbonate style of orogenic deposits or the associated hydrothermal footprint, but also allowed for preservation of at least part of the gold deposits that are mainly hosted in the highly reactive Fe-rich basalt of the Tisdale assemblage. Additional key factors include the presence of komatiitic and/or basaltic komatiite flows, competent pre- and syn-Timiskaming subalkaline and alkaline intrusions that predate the main phase of shortening, and the occurrence of a flexure in the trace of the Destor-Porcupine fault zone that may have further facilitated and focused the ore-forming fluid upflow in the most endowed part of the camp. The complex structural and rheological discontinuities, competency contrasts, and early-stage folds with associated fracture and fault netorks in the camp provided highly favorable ground-preparation conditions.
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Cranston, Ross, Emilios Avgouleas, Kristin van Zweiten, Theodor van Sante, and Christoper Hare. "2. Prudential Regulation I: Capital and Liquidity Controls." In Principles of Banking Law. Oxford University Press, 2018. http://dx.doi.org/10.1093/he/9780199276080.003.0002.

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This chapter begins with a discussion of the reasons for bank regulation. Traditionally the focus of bank regulation has been the protection of individual institutions' stability from a depositors' run, and of depositors and deposit guarantee schemes from incurring losses in the event of bank failures. Another fundamental goal was the protection of taxpayers from a public bailout and from the kind of moral hazard that arises when public bank rescues are likely. However, in recent years, and especially since the global financial crisis the focus of bank regulation has broadened to include eliminating too-big-to-fail institutions; increasing capital cushions and introducing liquidity requirements; and enhancing the resilience of the financial system to withstand system-wide shocks. The remainder of the chapter covers prudential regulation, capital regulation, the different phases of the Basel capital framework, and the total loss absorbing capacity standard.
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Salge, Tobias, Roald Tagle, Ralf-Thomas Schmitt, and Lutz Hecht. "Petrographic and chemical studies of the Cretaceous-Paleogene boundary sequence at El Guayal, Tabasco, Mexico: Implications for ejecta plume evolution from the Chicxulub impact crater." In Large Meteorite Impacts and Planetary Evolution VI. Geological Society of America, 2021. http://dx.doi.org/10.1130/2021.2550(08).

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ABSTRACT A combined petrographic and chemical study of ejecta particles from the Cretaceous-Paleogene boundary sequence of El Guayal, Tabasco, Mexico (520 km SW of Chicxulub crater), was carried out to assess their formation conditions and genetic relation during the impact process. The reaction of silicate ejecta particles with hot volatiles during atmospheric transport may have induced alteration processes, e.g., silicification and cementation, observed in the ejecta deposits. The various microstructures of calcite ejecta particles are interpreted to reflect different thermal histories at postshock conditions. Spherulitic calcite particles may represent carbonate melts that were quenched during ejection. A recrystallized microstructure may indicate short, intense thermal stress. Various aggregates document particle-particle interactions and intermixing of components from lower silicate and upper sedimentary target lithologies. Aggregates of recrystallized calcite with silicate melt indicate the consolidation of a hot suevitic component with sediments at ≳750 °C. Accretionary lapilli formed in a turbulent, steam-condensing environment at ~100 °C by aggregation of solid, ash-sized particles. Concentric zones with smaller grain sizes of accreted particles indicate a recurring exchange with a hotter environment. Our results suggest that during partial ejecta plume collapse, hot silicate compo nents were mixed with the fine fraction of local surface-derived sediments, the latter of which were displaced by the preceding ejecta curtain. These processes sustained a hot, gas-driven, lateral basal transport that was accompanied by a turbulent plume at a higher level. The exothermic back-reaction of CaO from decomposed carbonates and sulfates with CO2 to form CaCO3 may have been responsible for a prolonged release of thermal energy at a late stage of plume evolution.
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Conference papers on the topic "Basal deposits"

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Hannibal, Joseph T., Gordon C. Baird, and Carlton E. Brett. "REGIONAL-TEMPORAL CHARACTERISTICS OF PALEOZOIC, TRANSGRESSIVE, BASAL BLACK-SHALE DEPOSITS: MODELING DIACHRONOUS ONLAP PROCESSES ON OXYGEN-DEFICIENT, EROSIONAL-CORROSIONAL SUBSTRATES ON LAURENTIA." In 50th Annual GSA North-Central Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016nc-275224.

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Souza, Isabela Silva, Beatriz Cassarotti, Lucas de Oliveira Pinto Bertoldi, Alana Strucker Barbosa, Eduardo Silveira Marques Branco, Isabela Badan Fernandes, Bruno Eji Nakano, et al. "Fahr syndrome associated with post-thyroidectomy hypoparathyroidism." In XIII Congresso Paulista de Neurologia. Zeppelini Editorial e Comunicação, 2021. http://dx.doi.org/10.5327/1516-3180.567.

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Context: Fahr’s syndrome is a rare disorder characterized by bilateral and symmetrical abnormal calcifications in basal ganglia and cerebral cortex. Those calcified deposits are due to changes in calcium and phosphorus metabolisms that can be caused by endocrine disorders, mitochondrial myopathies, dermatological and infectious diseases. Clinical manifestations may include a variety of extrapyramidal, cerebelar and neuropsychiatric syndromes. Case report: This study describes a 75-year-old female patient that underwent total thyroidectomy in 1985 due to a multinodular goiter and presented post
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de Prost, D., A. Kanfer, C. Guettier, D. Nochy, N. Hinglais, and P. Druet. "ENHANCED GLOMERULAR PROCOAGULANT ACTIVITY AND FIBRIN DEPOSITION IN RATS WITH MERCURIC CHLORIDE-INDUCED AUTOIMMUNE NEPHRITIS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644347.

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The mechanism involved in glomerular fibrin deposition was investigated during HgCl2-induced autoimmune glomerulonephritis in the Brown Norway rat. To ascertain whether the local hemostatic system was activated secondarily to the immunological conflict, the ability of glomerular lysates to induce coagulation in vitro was measured in treated and control rats. On day 12 (latent phase of the disease), 20 (acme) and days 32 and 42 (recovery phase) after the first mercury injection proteinuria, glomerular procoagulant activity (PCA) and the incidence of glomerular fibrin deposits were assessed, the
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Lethagen, S., A. S. Harris, and I. M. Nilsson. "A NEW DELIVERY SYSTEM FOR DDAVP: CLINICAL EXPERIENCE OF DDAVP SPRAY PUMP IN MILD HAEMOPHILIA A AND vWD TYPE I." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644704.

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Until recently, the reliability and predectibility of the intranasal route of administration of DDAVP has been too poor to recommend it in routine practice.With the development of a new delivery system in the form of a spray puip we have previously shown that absorption and biological effect of DDAVP in volunteers is enhanced(1).In this patient study we conpared intranasal administration of 300 pg DDAVP using a newly developed pre-corrpression spray pinp with intravenous administration of 0.3 - 0.4 pg/kg. We studied 24 patients with mild haemophilia A, 23 with mild vWD Type IA and 8 with Type
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Hudyma, N., N. Walker, and B. Chittoori. "Mapping and Characterization of Rockfall Runout Talus Deposits from Columnar Basalt Cliffs in Boise, ID." In 56th U.S. Rock Mechanics/Geomechanics Symposium. ARMA, 2022. http://dx.doi.org/10.56952/arma-2022-2071.

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ABSTRACT: The Boise Valley contains several columnar jointed basalt cliffs, which were deposited approximately 1.4 to 0.5 Ma on terraces formed by downcutting of the Boise River. Three runout talus deposits on Whitney Terrace were characterized using unmanned aerial vehicle visual imagery. Although the runout talus deposits were from different areas and were of varying size, they contained roughly the same dimensions and distributions of blocks. Images of the cliff face indicated that blocks were detached from the base of columns along horizontal discontinuities which lacked support (undercut
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Matasovic, N., C. Conkle, A. F. Witthoeft, A. Stern, and T. Hadj-Hamou. "Back Analysis of Landslide Deposit Basal Failure Plane Residual Shear Strength." In Second International Conference on Geotechnical and Earthquake Engineering. Reston, VA: American Society of Civil Engineers, 2013. http://dx.doi.org/10.1061/9780784413128.056.

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Cole, Meredith A., and Greg Valentine. "PALEOTOPOGRAPHIC CONTROLS ON THE UPPER BANDELIER TUFF BASAL DEPOSIT, VALLES CALDERA, NM." In GSA 2020 Connects Online. Geological Society of America, 2020. http://dx.doi.org/10.1130/abs/2020am-348657.

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Tendil, Anthony J. B., Laura Galluccio, Catherine Breislin, Jawaher A. Alsabeai, Arthur P. C. Lavenu, and Hidenori Obara. "New Insights on the Lower Lekhwair Formation offshore Abu Dhabi: Understanding the Key Role of Lithocodium/bacinella Floatstones on Large Scale Reservoir Quality Variations." In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/207692-ms.

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Abstract The Lower Cretaceous Lekhwair Formation is one of the most prolific oil reservoirs in onshore and offshore UAE, yet the available literature on this interval remains limited. Based on a recent study carried out in collaboration with ADNOC Offshore, the present paper provides new insights into the comprehension of the interplay between primary depositional and secondary diagenetic controls on the reservoir performance, which is of crucial importance for the refinement of the static and dynamic models. In offshore Abu Dhabi, the Lower Lekhwair Formation is characterised by an alternatio
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KLUFOVÁ, Pavla, Jan TITTEL, Marek VOSTŘÁK, Zdeněk JANSA, and Antonín KŘÍŽ. "CORROSION RESISTANCE OF LASER-DEPOSITED COMPOSITE COPPER-BASALT OVERLAY." In METAL 2019. TANGER Ltd., 2019. http://dx.doi.org/10.37904/metal.2019.877.

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Chikhradze, Nikoloz. "THE PROPERTIES OF BASALT ROCKS OF GEORGIAN DEPOSITS AND THE FIBERS OBTAINED FROM THEM." In 14th SGEM GeoConference on NANO, BIO AND GREEN � TECHNOLOGIES FOR A SUSTAINABLE FUTURE. Stef92 Technology, 2014. http://dx.doi.org/10.5593/sgem2014/b62/s26.051.

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Reports on the topic "Basal deposits"

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Graves, M. C., and F. J. Hein. Compilation, synthesis, and stratigraphic framework of mineral deposits within the basal Windsor Group, Atlantic Provinces, Canada. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1994. http://dx.doi.org/10.4095/194160.

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Jackson, G. D. Bedrock geology, northwest part of Nuluujaak Mountain, Baffin Island, Nunavut, part of NTS 37-G/5. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/314670.

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The map area lies about 40 km northwest of Baffinland's iron mine. Dykes of unit mAnA3 within unit mAnA2 suggest that unit mAnA2 predates unit mAnA3. Unit nAMqf, basal Mary River Group unit, includes regolith material from units mAnA2 and mAnA3. Unit mAnAm may include some dykes of unit nAMb. The Mary River Group was deposited in a volcanic-arc environment, yielding zircon U-Pb ages mostly in the range of 2.88 to 2.72 Ga. Iron-formation (unit nAMi) is approximately 276 m thick locally, with oxide facies (unit nAMio) being most abundant. The quartzite triangle west of 'Iron lake' (unofficial na
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Kerr, D. E. Reconnaissance surficial geology, Beechey Lake, Nunavut, NTS 76-G. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329669.

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Preliminary mapping studies of Beechey Lake map area, through aerial photograph interpretation and limited legacy data, improve our understanding of surficial sediments and glacial history. The area is dominated by glacially and meltwater-scoured bedrock, hummocky moraine, till of varying thickness occasionally streamlined, and thin ridged till. Glacial lake sediments are predominantly in river valley lowlands. Glaciolacustrine delta and raised beach elevations range from 410 m to 230 m and 440 m to 290 m, respectively. Glaciofluvial deposits consist of eskers, ice-contact mounds, proglacial o
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Kuster, K., C. M. Lesher, and M. G. Houlé. Geology and geochemistry of mafic and ultramafic bodies in the Shebandowan mine area, Wawa-Abitibi terrane: implications for Ni-Cu-(PGE) and Cr-(PGE) mineralization, Ontario and Quebec. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329394.

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The Shebandowan Ni-Cu-(PGE) deposit occurs in the Shebandowan greenstone belt in the Wawa-Abitibi terrane. This deposit is one of a few economic Ni-Cu-(PGE) deposits in the Superior Province and one of a very few deposits worldwide that contains both Ni-Cu-(PGE) and Cr-(PGE) mineralization. The mafic-ultramafic successions in the area comprise abundant flows and sills of tholeiitic basalt and lesser Al-undepleted komatiite (MgO &amp;amp;gt;18 wt%, Al2O3/TiO2 = 15-25), the latter indicating separation from mantle sources at shallow levels. Siliceous high-Mg basalts (MgO 8-12 wt%, SiO2 &amp;amp;
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Piercey, S. J., S. Paradis, J. M. Peter, and T. L. Tucker. Geochemistry of basalt from the Wolverine volcanic-hosted massive-sulphide deposit, Finlayson Lake district, Yukon Territory. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2002. http://dx.doi.org/10.4095/213069.

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Mueller, C., S. J. Piercey, M. G. Babechuk, and D. Copeland. Stratigraphy and lithogeochemistry of rocks from the Nugget Pond Deposit area, Baie Verte Peninsula, Newfoundland. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328989.

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Stratigraphic and lithogeochemical data were collected from selected drill core from the Nugget Pond gold deposit in the Betts Cove area, Newfoundland. The stratigraphy consists of a lower unit of basaltic rocks that are massive to pillowed (Mount Misery Formation). This is overlain by sedimentary rocks of the Scrape Point Formation that consist of lower unit of turbiditic siltstone and hematitic cherts/iron formations (the Nugget Pond member); the unit locally has a volcaniclastic rich-unit at its base and grades upwards into finer grained volcaniclastic/turbiditic rocks. This is capped by ba
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