Norwegian Journal of Geology最新文献_第6页

Frictional energy patterns related to the temperature increases due to intraplate seismicity, southern Norway, 2000–2019 catalogue 与板块内地震活动导致的温度升高有关的摩擦能模式，挪威南部，2000-2009目录

IF 0.8 4区地球科学

Norwegian Journal of Geology Pub Date : 2021-04-21 DOI: 10.17850/NJG101-1-5

C. Pavez, R. Estay, M. Brönner, Adrián Ortiz, Flavio Debarbieri, J. Ibañez, Luis Guzmán

引用次数: 2

The Farsund Shear Zone: geochemical evidence for lithological diversity in the wall rock of the Rogaland Anorthosite Province, South Norway 法尔松剪切带:挪威南部罗加兰斜长岩省围岩岩性多样性的地球化学证据

IF 0.8 4区地球科学

Norwegian Journal of Geology Pub Date : 2021-03-18 DOI: 10.17850/NJG100-4-3

J. Duchesne, J. Hertogen

引用次数: 1

Tectono-sedimentary evolution of the eastern Forlandsundet Graben, Svalbard 斯瓦尔巴群岛东部福兰巽他地堑的构造-沉积演化

IF 0.8 4区地球科学

Norwegian Journal of Geology Pub Date : 2021-03-10 DOI: 10.17850/NJG100-4-4

N. Schaaf, P. Osmundsen, R. van der Lelij, J. Schönenberger, O. Lenz, T. Redfield, K. Senger

引用次数: 2

A 1.9 Ga glacial sedimentary-facies association at low palaeolatitude in the Bergslagen Group, Grythyttan Field, Central Sweden 瑞典中部Grythyttan油田Bergslagen群低古纬度1.9 Ga冰川沉积相组合

IF 0.8 4区地球科学

Norwegian Journal of Geology Pub Date : 2021-02-09 DOI: 10.17850/NJG101-1-1

G. Kuipers, F. Beunk, K. Yi

引用次数: 0

Structural geology and basin development of the Norwegian Sea 挪威海构造地质与盆地发育

IF 0.8 4区地球科学

Norwegian Journal of Geology Pub Date : 2021-01-05 DOI: 10.17850/NJG100-4-1

R. Færseth

引用次数: 4

The >494 Ma Lillevik ophiolite fragment (Gratangseidet Igneous Complex) near Narvik, Scandinavian Caledonides 斯堪的纳维亚Caledonides Narvik附近的>494 Ma Lillevik蛇绿岩碎片(Gratangseidet火成岩杂岩

IF 0.8 4区地球科学

Norwegian Journal of Geology Pub Date : 2021-01-05 DOI: 10.17850/NJG100-4-5

T. Slagstad, Mark Anderson, K. Saalmann, G. Hagen-Peter

{"title":"The >494 Ma Lillevik ophiolite fragment (Gratangseidet Igneous Complex) near Narvik, Scandinavian Caledonides","authors":"T. Slagstad, Mark Anderson, K. Saalmann, G. Hagen-Peter","doi":"10.17850/NJG100-4-5","DOIUrl":"https://doi.org/10.17850/NJG100-4-5","url":null,"abstract":"One of several irregular, plagioclase-phyric felsic veins in the Lillevik ophiolite fragment (Gratangseidet Igneous Complex) in Narvik, northern Norway, yielded a U–Pb zircon age of 494 ± 5 Ma. The veins cut deformed, compositionally layered, light REE-depleted gabbros that arguably constituted part of the now-dismembered ophiolite stratigraphy. The felsic veins were themselves deformed, probably during Silurian Scandian deformation, but the cross-cutting relationships suggest that they post-date initial deformation of the ophiolitic rocks. The felsic veins are strongly depleted in heavy REE and have moderately juvenile Lu–Hf zircon compositions, with εHf494 between 6.2 and 9.9. By analogy with felsic rocks in other Caledonian ophiolites and supported by cross-cutting relationships, the chemical and isotopic data can be interpreted to reflect formation by partial melting of basaltic rocks in the presence of residual garnet. In this case, the felsic veins probably post-date ophiolite formation and obduction onto a continental margin. We therefore interpret the age of 494 Ma to represent the minimum age of formation of the Lillevik ophiolite fragment. Previously published age, isotopic and chemical data from the region document an at least 20 Myr-long complex magmatic evolution following ophiolite obduction. The new data show that Late Cambrian to Early Ordovician ophiolite fragments extend along most of the length of the Scandinavian Caledonides. The tectonic significance of a previously published age of 474 Ma from the Gratangseidet Igneous Complex and 481 to 469 Ma ages from a tonalite sheet in the nearby Lyngen ophiolite, both interpreted to reflect ophiolite formation, needs to be tested by obtaining whole-rock geochemical data from these units. ablation cathodoluminescence LA–ICP–MS using ablation.","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2021-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45270219","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}

引用次数: 0

Comment on ‘A Miocene age for the Molo Formation, Norwegian Sea shelf off Vestfjorden, based on marine palynology’ 关于“基于海洋孢粉学的挪威Vestfjorden海陆架Molo组中新世时代”的评论

IF 0.8 4区地球科学

Norwegian Journal of Geology Pub Date : 2021-01-01 DOI: 10.17850/NJG101-1-2

H. Løseth

引用次数: 0

Petrography, bulk-rock geochemistry, detrital zircon U–Pb geochronology and Hf isotope analysis for constraining provenance: An example from Middle Triassic deposits (Bravaisberget Formation), Sørkappøya, Svalbard 制约物源的岩石学、大块岩石地球化学、碎屑锆石U–Pb地质年代学和Hf同位素分析：以斯瓦尔巴群岛Sørkappøya中三叠纪矿床（Bravaisberget组）为例

IF 0.8 4区地球科学

Norwegian Journal of Geology Pub Date : 2020-11-18 DOI: 10.17850/njg100-3-5

Urszula Czarniecka, Beyene G. Haile, A. Braathen, K. Krajewski, M. Kristoffersen, P. Jokubauskas

引用次数: 2

The first evidence of Late Ordovician magmatism of the October Revolution Island (Severnaya Zemlya archipelago, Russian High Arctic): geochronology, geochemistry and geodynamic settings 十月革命岛晚奥陶世岩浆活动的第一个证据:地质年代学、地球化学和地球动力学背景

IF 0.8 4区地球科学

Norwegian Journal of Geology Pub Date : 2020-10-26 DOI: 10.17850/njg100-3-4

M. Kurapov, V. Ershova, A. Khudoley, Alexander A. Makariev, E. Makarieva

引用次数: 3

A Cambrian–Ordovician boundary section in the Rafnes–Herøya submarine tunnel, Skien–Langesund District, southern Norway 挪威南部Skien-Langesund地区Rafnes-Herøya海底隧道寒武系-奥陶系边界剖面

IF 0.8 4区地球科学

Norwegian Journal of Geology Pub Date : 2020-09-30 DOI: 10.17850/NJG100-3-3

K. Ronning, D. Bruton, D. Harper, M. Høyberget, J. Maletz, H. A. Nakrem

{"title":"A Cambrian–Ordovician boundary section in the Rafnes–Herøya submarine tunnel, Skien–Langesund District, southern Norway","authors":"K. Ronning, D. Bruton, D. Harper, M. Høyberget, J. Maletz, H. A. Nakrem","doi":"10.17850/NJG100-3-3","DOIUrl":"https://doi.org/10.17850/NJG100-3-3","url":null,"abstract":"Rock specimens and contained fossils collected in 1976 from a submarine tunnel driven between Herøya and Rafnes in the Skien–Langesund area of southern Norway, have been restudied. The contained fossils include olenid and agnostoid trilobites, graptolites and brachiopods, groups described in detail for the first time from the area and documenting a Cambrian–Ordovician boundary section unique in the district where the upper Cambrian Alum Shale Formation is elsewhere overlain by the Middle Ordovician Rognstranda Member of the Huk Formation (Kundan in terms of Baltoscandian chronostratigraphy). The hiatus at the base of the Huk Formation is thus smaller in the section described herein, beginning at a level within rather than below the Tremadocian. Estimated thickness of the Alum Shale includes 10–12 m of Miaolingian and 20–22 m of Furongian strata with trilobite zones identified, and a Tremadocian section of 8.1 m identified by species of the dendroid graptolite Rhabdinopora (unpublished) shot above the transect. The seismic data reveal the submarine continuation of the steep boundary escarpment of the Cambrian–Ordovician rocks typical of the landscape to the south of the tunnel location. The Lower Palaeozoic strata of the Skien–Langesund District typically dip eastwards towards the Permian plutons, and are cut by numerous faults and igneous dykes related to the Permian rifting of the Oslo Region. All the Middle–Late Ordovician formations described from outcrops in the Skien–Langesund District can be recognised in the tunnel section. However, a detailed stratigraphic investigation is beyond the subject of this work.","PeriodicalId":49741,"journal":{"name":"Norwegian Journal of Geology","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47285309","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}

引用次数: 0