Norwegian Journal of Geology最新文献

{"title":"Distribution, deposition and impact of submarine mine tailings disposal on the fjord bottom in Frænfjorden, western Norway","authors":"N. Baeten, A. Lepland, R. Bøe, Arnstein Amundsen, S. Chand, O. Longva","doi":"10.17850/njg100-1-3","DOIUrl":"https://doi.org/10.17850/njg100-1-3","url":null,"abstract":"Frænfjorden, a fjord on the west coast of Norway, has been studied to increase our knowledge of the environmental effects of submarine tailings placement (STP). Fine-grained tailings consisting primarily of calcite are disposed of by Omya Hustadmarmor. The dataset, including multibeam echosounder data, shallow seismic, video data, grab samples and sediment cores, demonstrates that tailings are primarily deposited in an up to 2 km-wide area with a tailings thickness of up to 20 m. Minor quantities of tailings are spread outside the STP by tidal currents. Sediment cores show the difference in colour, mineralogy and grain size between the natural sediments and the tailings. The tailings have a white/grey colour, are very fine grained, contain high amounts of calcite and have a lower water content than the natural sediments. A series of multibeam echosounder data from 2013 to 2017 show that deposition of tailings has triggered several small gravity flows and slides. The tailings within the STP have a low stability compared to the natural sediments outside the STP because of their fine grain size and higher sensitivity, high slope angles, high sediment accumulation rates preventing normal consolidation, and loading of tailings causing overpressure in the underlying sediments.","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2020-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43317804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Late Palaeozoic fault-controlled hydrothermal Cu–Zn mineralisation on Vanna island, West Troms Basement Complex, northern Norway","authors":"Hanne-Kristin Paulsen, S. Bergh, S. S. Palinkaš","doi":"10.17850/njg100-1-2","DOIUrl":"https://doi.org/10.17850/njg100-1-2","url":null,"abstract":"The Vannareid–Burøysund fault is a major, brittle, normal fault in northern Norway, with cohesive fault rocks (cataclasites) that host Cu–Zn - bearing quartz - carbonate veins. The fault is exposed on the island of Vanna in the Neoarchaean to Palaeoproterozoic West Troms Basement Complex, separating variably deformed tonalitic gneisses in the footwall from mylonitised metasedimentary rocks and tonalites in the hanging wall. Radiometric dating (K–Ar illite) of normal fault movement along the Vannareid–Burøysund fault yielded a late Permian age, concurrent with incipient post - Caledonian continental rifting. The fault evolution and internal architecture of the Vannareid–Burøysund fault largely controlled the spatial distribution of mineralisation, and two main phases of the Cu–Zn mineralisation have been discerned. Early quartz - sphalerite veins are deposited in the cataclastic fault core zone, where initial movement along the fault created a fluid conduit that allowed for fluid flow and sphalerite deposition. With subsequent movement and widening of the fault zone, a later and spatially more extensive generation of quartz - chalcopyrite veins were deposited in both the fault core and the damage zones. Fluid inclusion micro - thermometry revealed that the ore - forming fluids were highly saline aqueous solutions (20 – 37 wt.% NaCl + CaCl 2 ) that carried base metals and sulphur. Further, the isotopic composition of hydrothermal carbonates indicates a magmatic source for the CO 2 . The structural data and obtained geochemical results indicate that the Cu–Zn mineralisation in the Vannareid–","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":"1 1","pages":"1-41"},"PeriodicalIF":0.8,"publicationDate":"2020-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45241851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"You learn as long as you drill; research synthesis from the Longyearbyen CO2 Laboratory, Svalbard, Norway","authors":"S. Olaussen, K. Senger, A. Braathen, Stein-Andreas Grundvåg, A. Mørk","doi":"10.17850/njg008","DOIUrl":"https://doi.org/10.17850/njg008","url":null,"abstract":"","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":"99 1","pages":"157-187"},"PeriodicalIF":0.8,"publicationDate":"2020-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47358566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new species of ischnacanthiform acanthodian from the Givetian of Mimerdalen, Svalbard","authors":"M. Newman, C. Burrow, J. Blaauwen","doi":"10.17850/njg99-4-05","DOIUrl":"https://doi.org/10.17850/njg99-4-05","url":null,"abstract":"A new ischnacanthiform acanthodian Serradentus armstrongi nov. gen. et sp. has been collected from the Middle Devonian (Givetian) Fiskekløfta Member, the upper member of the Tordalen Formation in the Mimerdalen Subgroup of Spitsbergen. The specimen comprises both pairs of upper and lower jaw bones, jaw cartilages, tooth or denticle whorls, dentition cones and spiky denticles. The latter two features have previously only been identified in Early Devonian ischnacanthiforms. The geology is consistent with a depositional environment of a brackish backwater lagoon with an anoxic bottom. The fish probably entered the lagoon during storm action and died due to the storm churning up bottom anoxic waters, or from being trapped and killed by hypersalinity. The fish possibly partially decomposed on the surface before the head detached and sank to the lagoon floor. The lack of scavengers due to the anoxic conditions prevented scattering of the individual elements, with denticles preserved along the labial surface of the dentigerous jaw bone, and jaw cartilage under the jaw bone.","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2020-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45391820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Discovery of shale gas in organic-rich Jurassic successions, Adventdalen, Central Spitsbergen, Norway","authors":"S. Ohm, Leif Larsen, S. Olaussen, K. Senger, T. Birchall, T. Demchuk, A. Hodson, I. Johansen, Geir Ove Titlestad, D. Karlsen, A. Braathen","doi":"10.17850/njg007","DOIUrl":"https://doi.org/10.17850/njg007","url":null,"abstract":"1Department of Arctic Geology, The University Centre in Svalbard, PO box 156, 9171 Longyearbyen, Norway. 2Department of Energy Resources, University of Stavanger, P.O. Box 8600 Forus, 4036 Stavanger Norway. 3KAPPA Engineering, Myklabergstien 15, N–4052 Røyneberg, Norway. 4Department of Geosciences, University of Oslo, PO Box 1047 Blindern, 0316 Oslo, Norway. 5RPS Group Inc, Chasewood Technology Park, 20405 Tomball Parkway, Building Two, Suite 200, Houston, Texas 77070–2618, USA. 6Institute for Energy Technology, Instituttveien 18, 2007 Kjeller, Norway. 7Gotic AS, P.O. Box 8034 Forus, 4068 Stavanger, Norway.","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2020-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45070765","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Sortlandsundet Basin, Vesterålen, northern Norway: a Jurassic basin based on erratics, seismic mapping and regional correlations","authors":"M. Smelror, R. Bøe, B. Davidsen, D. Ottesen","doi":"10.17850/njg99-4-4","DOIUrl":"https://doi.org/10.17850/njg99-4-4","url":null,"abstract":"The Sortlandsundet Basin is a half-graben with Mesozoic sediments located in Sortlandsundet between Langøya and Hinnøya in Vesterålen. The basin is defined by the Hadselfjord Fault Zone in the southeast and by unconformable boundaries to Archaean to Palaeoproterozoic basement rocks to the northeast, northwest and southwest. The basin may have originated as an extensional basin and evolved as a transtensional basin in the Jurassic–Early Cretaceous. Sedimentary strata of probable Jurassic age within the basin are more than 400 m thick, with seismic reflectors dipping slightly to the southeast. Glacial-transported erratic blocks, assumed to derive from the Sortlandsundet Basin, are found along the shores of Sortlandsundet. The blocks comprise quartz-rich sedimentary rocks, varying from conglomerates to fine sandstones, representing terrestrial to shallow-marine deposits. Many of the erratic blocks contain common macroand microfossils of Middle and Late Jurassic age. A syn-tectonic depositional model for the Sortlandsundet Basin with correlations to the age-equivalent strata offshore Vesterålen (Ribban Basin) and on Andøya is discussed.","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2020-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48236770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Caprock integrity of the Draupne Formation, Ling Depression, North Sea, Norway","authors":"R. Gabrielsen, E. Skurtveit, J. Faleide","doi":"10.17850/NJG100-4-2","DOIUrl":"https://doi.org/10.17850/NJG100-4-2","url":null,"abstract":"","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67528181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Miocene age for the Molo Formation, Norwegian Sea shelf off Vestfjorden, based on marine palynology","authors":"K. Grøsfjeld, K. Dybkjær, T. Eidvin, F. Riis, E. Rasmussen, J. Knies","doi":"10.17850/njg99-3-6","DOIUrl":"https://doi.org/10.17850/njg99-3-6","url":null,"abstract":"Seven side-wall core samples from the lower part of the Molo Formation in exploration well 6610/3–1 off Vestfjorden/Lofoten have been reanalysed for marine palynomorphs. Description of new species from other studies and access to reference successions from nearby sites with an independent chronostratigraphy have enabled a more reliable depositional age constraint for the Molo Formation in its northern distribution area than previously achieved. The new data (e.g., the lowest occurrence of the dinoflagellate cysts Barssidinium graminosum and Barssidinium pliocenicum and the highest occurrence of the dinoflagellate cysts Minisphaeridium latirictum and Operculodinium piaseckii) provide incontrovertible evidence for a Miocene age for the Molo Formation in well 6610/3–1. Our data suggest that the Molo Formation in well 6610/3–1 started to accumulate after erosional activity which took place between the late middle Miocene and the late Miocene. The data (especially the presence of the dinoflagellate cyst A. andalouisiensis andalousiensis, the co-occurrence of the dinoflagellate cysts Barssidinium evangelineae and M. latirictum and the presence of the acritarch L. lucifer) suggest that the Molo Formation in well 6610/3–1 started to accumulate at around 8.8 / 8.7 Ma. The sediments were deposited in a warm temperate, high-energy environment influenced by river discharge. During deposition, older sediments, particularly from the Paleogene, became extensively eroded. The erosion and rapid accumulation were probably associated with the combined effects of eustatic sea-level fall and uplift/updoming of the hinterland/coastal zone.","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42806693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Burden of Disease and Current Management of Dementia with Lewy Bodies: A Literature Review.","authors":"Amir Abbas Tahami Monfared, Genevieve Meier, Richard Perry, Darren Joe","doi":"10.1007/s40120-019-00154-7","DOIUrl":"10.1007/s40120-019-00154-7","url":null,"abstract":"<p><strong>Introduction: </strong>A significant proportion of dementia is concretely estimated to be attributable to dementia with Lewy bodies (DLB)-one of the most common types of progressive dementia; however, there is a paucity of literature on this disease. We aimed to examine available evidence to gain a better understanding of its treatment landscape, clinical management, and disease burden.</p><p><strong>Methods: </strong>A systematic literature review captured any DLB studies that report on randomised controlled trials (RCTs), epidemiology, disease progression, and economic data. An additional targeted literature review captured studies reporting on clinical management and quality of life (QoL) in this disease. Publication date was limited to 1 January 2007-26 March 2018, with the exception for RCTs, where no time restrictions were applied.</p><p><strong>Findings: </strong>Of the 3486 studies initially identified, 55 studies were eligible for inclusion. The studies were mainly from Europe (n = 29), the USA (n = 9), and Japan (n = 8). Mini-Mental State Examination and Neuropsychiatric Inventory scores were the most commonly reported clinical outcomes in RCTs (n = 14). The most frequently identified interventions reported in RCTs were donepezil and memantine. Patients with DLB typically reported worse outcomes in relation to efficacy and safety, cognitive impairment, survival, and QoL compared with those with Alzheimer's disease (AD). Additionally, patients with DLB were associated with higher hospitalisation rates and cost of care. Furthermore, there is a reliance on a small number of consensus guidelines. Of these, only one set of guidelines (DLB Consortium) was developed specifically for DLB.</p><p><strong>Conclusion: </strong>The paucity of data indicates an unmet need in this therapy area. Although several studies look into the clinical and pathological aspects of DLB, consensus guidelines and studies on healthcare utilisation in patients with dementia have largely focused on AD. Additionally, most of the findings were made in comparison with AD.</p><p><strong>Funding: </strong>Eisai Inc.</p>","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":"1 1","pages":"289-305"},"PeriodicalIF":3.7,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6858913/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89643417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentological and palynological investigations of the Neoproterozoic Valdres Group","authors":"Even Stokkebekk, Eirik N. Nordeng, H. Dypvik, Rikke Ø. Småkasin, Kathrine Sørhus, Wolfram M Kürschner","doi":"10.17850/njg99-4-2","DOIUrl":"https://doi.org/10.17850/njg99-4-2","url":null,"abstract":"The Valdres Group (?Cryogenian) has been sedimentologically and stratigraphically studied and sampled in a few key sites (Grønsennknippa, Mellane, Ormtjernkampen). The search for fossils in selected formations has been the target and one identified acantomorphic acritarch was discovered along with other organic matter of more uncertain heritage. In addition to the diamictite/tillite present in the Valdres Group succession, this facilitates a correlation with the well-known Hedmark Group to the east.","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2019-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44529043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}