GffPub Date : 2023-10-26DOI: 10.1080/11035897.2023.2251154
Stefan E. Hagenfeldt, Erik Palmlöv, Aleksey Amantov, Jonas Hagström, Rémy Ghalayini, Thomas Liljedahl
{"title":"The development of dark shales from the middle and late Cambrian to early Ordovician on the East European Platform – with focus on Gotland","authors":"Stefan E. Hagenfeldt, Erik Palmlöv, Aleksey Amantov, Jonas Hagström, Rémy Ghalayini, Thomas Liljedahl","doi":"10.1080/11035897.2023.2251154","DOIUrl":"https://doi.org/10.1080/11035897.2023.2251154","url":null,"abstract":"By compiling data from literature and unpublished reports a more detailed description is presented on the geographical and stratigraphic distribution of the Alum Shale Formation (ASF) and correlateable units on the East European Platform. In the northern part of Gotland, downfaulted patchy beds of the ASF indicate a former wider extension of the formation. Lower Ordovician (Tremadocian) examples of downfaulted patchy beds are the contemporaneous Sepopol and Nivenskaya formations in northeastern Poland and the Kaliningrad area, as well as the Salantai Formation in the east Baltic area. It is indicated that Furongian-Tremadocian beds, contemporaneous with the Kallavere, Türisalu, Tosna and Koporye formations, in the area of northern Estonia and the northwestern part of the Moscow Basin, extended to the Gotland and the South Bothnian Basin areas. South of Gotland, in the Swedish sector of the Baltic Basin, drill cores show evidence of tectonic movements through the presence of erosional surfaces indicating occasional subaerial exposure. In this region, variations in the areal extent and thickness of the ASF and coeval formations are suggested to be the result of epeirogenic and tectonic block movements. Tremadocian ASF is also indicated to be present south of Gotland. On Gotland, at least 5 m of the ASF is presumed to have been eroded. The Moscow Basin contains 19 m of dark shales (Koporye Formation) which is significantly thicker than in surrounding areas.","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135016603","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}
GffPub Date : 2023-08-10DOI: 10.1080/11035897.2023.2233571
J. R. Ebbestad, P. Cederström, J. S. Peel
{"title":"Shell injuries, repair and malformation in the early Cambrian mollusc Helcionella antiqua from Scania, Sweden","authors":"J. R. Ebbestad, P. Cederström, J. S. Peel","doi":"10.1080/11035897.2023.2233571","DOIUrl":"https://doi.org/10.1080/11035897.2023.2233571","url":null,"abstract":"ABSTRACT Three cases of repaired injuries and malformation in specimens of the helcionelloid mollusc Helcionella antiqua (Kiær, 1917) from the lower Cambrian (Cambrian Series 2, Stage 4) Gislöv Formation of southern Sweden document some of the oldest known durophagous attacks on Palaeozoic molluscs. Two of the injuries are developed as clefts, of which one had a severe effect on the continued growth of the shell. The third example is a large embayment removing large portions of the supra-apical part of the shell. A similar repaired injury is known in the slightly older mollusc Marocella mira Geyer, 1986. from Antarctica and Australia. The morphology of the injuries and the hydrodynamically quiet depositional setting suggests that the shell damage was caused by failed predatory attacks. The location of the repaired injuries suggests that the attacks may have targeted the head region of the molluscs, thus supporting an endogastrically coiled orientation of the shell in Helcionella. Only three repaired injuries in 252 Helcionella specimens were found, giving a shell repair frequency of 1.2%. All three examples occur in the larger size classes. The size-frequency distribution (N = 182) is strongly right skewed, which could suggest high input of juvenile specimens into the assemblage. The assemblage is interpreted as a time averaged and mixed death assemblage, albeit with good correspondence with the living shelly assemblage, due to a relatively thin, homogenous unit that may suggest within-habitat time averaging.","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44741162","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}
GffPub Date : 2023-08-02DOI: 10.1080/11035897.2023.2233575
Patrick Hänsel, S. Oehrl, Lena Ideström, Per Widerström, Carl J. Reddin, A. Munnecke
{"title":"Stable carbon and oxygen isotope geochemistry as provenance indicator for the picture stones on Gotland (Sweden)","authors":"Patrick Hänsel, S. Oehrl, Lena Ideström, Per Widerström, Carl J. Reddin, A. Munnecke","doi":"10.1080/11035897.2023.2233575","DOIUrl":"https://doi.org/10.1080/11035897.2023.2233575","url":null,"abstract":"ABSTRACT The picture stones from Gotland are one of the most famous and exceptional groups of monuments known from Swedish Prehistory. These carved memorial stones and their extraordinarily rich imagery are a unique source for the study of Late Iron and Viking Age culture and in particular Scandinavian pre-Christian religions. The Gotlandic picture stones are mainly made from the thickly layered limestones surrounding the reefs and bioherms of Gotland’s carbonate platform from the middle part of the Silurian (latest Llandovery to Ludlow, Telychian – Ludfordian). However, the exact origins of the picture stones’ raw materials on Gotland have remained undetermined. In this paper, we investigate the geological origin of the raw material by isotope geochemistry. Whereas the oxygen (δ18O) and strontium isotope ratio (87Sr/86Sr) were strongly altered by diagenesis the carbon isotope ratio (δ13C) is quite stable. Because the different geological units on Gotland show specific isotope signatures, the δ13C values from picture stones can be used to assign them to the respective geological unit, and thus to the source area of the raw material. This also allows for an estimation of transport distance minima between the raw material source area and the find place of each sampled picture stone. Most of the picture stones seem to be produced from local material with short transport distances, less than 10 km and only a few were transported at a far distance exceeding 10 km. In summary, the transport distance was dependent mostly on the local availability of picture-stone-suitable rocks.","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46677145","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}
GffPub Date : 2023-08-01DOI: 10.1080/11035897.2023.2223579
A. Ernst, Z. Tolokonnikova
{"title":"Unusual cystoporate? bryozoan from the Upper Ordovician of Siljan District, Dalarna, central Sweden","authors":"A. Ernst, Z. Tolokonnikova","doi":"10.1080/11035897.2023.2223579","DOIUrl":"https://doi.org/10.1080/11035897.2023.2223579","url":null,"abstract":"ABSTRACT Suecipora ebbestadi gen. n. sp. n. (Bryozoa) is described from the Upper Ordovician of Siljan District, Dalarna, central Sweden. This taxon is characterized by long peristome-like tubes with keel-shaped projections, as well as apparent angular kenozooecia. These morphologies are regarded being homologous to the post-Palaeozoic cyclostomes. Colonies of Suecipora are mainly multilayered developed by budding of new sheets from peristome-like tubes. The morphology of Suecipora suggests its adaptation to an environment with soft substrate and strong sediment influx. It is supposed that the colonies of this bryozoan were partially elutriated and experienced fresh water diagenesis.","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42334798","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}
GffPub Date : 2023-07-25DOI: 10.1080/11035897.2023.2233569
Risto A. Kumpulainen, Mike A. Hamilton, Ulf Söderlund, Johan Petter Nystuen
{"title":"U-Pb baddeleyite age for the Ottfjället Dyke Swarm, central Scandinavian Caledonides: new constraints on the timing of the Baltoscandian Dyke Swarm, opening of the Iapetus Ocean and Neoproterozoic glaciation of Baltica – comment on the inferred age of Neoproterozoic glaciation on Baltica – a reply","authors":"Risto A. Kumpulainen, Mike A. Hamilton, Ulf Söderlund, Johan Petter Nystuen","doi":"10.1080/11035897.2023.2233569","DOIUrl":"https://doi.org/10.1080/11035897.2023.2233569","url":null,"abstract":"Published in GFF (Vol. 144, No. 3-4, 2022)","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138532535","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}
GffPub Date : 2023-06-15DOI: 10.1080/11035897.2023.2205891
Dominik Gurba, Anna Grabarczyk-Gurba, E. Krzemińska
{"title":"Late Paleoproterozoic deposition and Mesoproterozoic metamorphism of detrital material in the southernmost Baltic Sea region (Gdańsk IG1 borehole): monazite versus zircon and chemical versus isotopic age record","authors":"Dominik Gurba, Anna Grabarczyk-Gurba, E. Krzemińska","doi":"10.1080/11035897.2023.2205891","DOIUrl":"https://doi.org/10.1080/11035897.2023.2205891","url":null,"abstract":"","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43577993","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}
GffPub Date : 2023-06-14DOI: 10.1080/11035897.2023.2205893
A. Rice
{"title":"U-Pb baddeleyite age for the Ottfjället Dyke Swarm, central Scandinavian Caledonides: New constraints on Ediacaran opening of the Iapetus Ocean and glaciations on Baltica – a comment on the inferred age of Neoproterozoic glaciations","authors":"A. Rice","doi":"10.1080/11035897.2023.2205893","DOIUrl":"https://doi.org/10.1080/11035897.2023.2205893","url":null,"abstract":"","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41258915","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}
GffPub Date : 2023-05-18DOI: 10.1080/11035897.2023.2201321
U. Andersson, Nils Jansson, Linda M. Wickström, S. Bergman, R. Kumpulainen, M. Johnson, M. Olvmo, Stephen McLoughlin, M. Calner
{"title":"Emendment to the term complex in: “Guide for geological nomenclature in Sweden” (Kumpulainen 2016)","authors":"U. Andersson, Nils Jansson, Linda M. Wickström, S. Bergman, R. Kumpulainen, M. Johnson, M. Olvmo, Stephen McLoughlin, M. Calner","doi":"10.1080/11035897.2023.2201321","DOIUrl":"https://doi.org/10.1080/11035897.2023.2201321","url":null,"abstract":"","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42452844","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}
GffPub Date : 2023-04-04DOI: 10.1080/11035897.2023.2187079
D. Holtstam
{"title":"Prehistory of an enigmatic mineral: hisingerite","authors":"D. Holtstam","doi":"10.1080/11035897.2023.2187079","DOIUrl":"https://doi.org/10.1080/11035897.2023.2187079","url":null,"abstract":"","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45962087","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}
GffPub Date : 2023-02-21DOI: 10.1080/11035897.2023.2168046
E. Jonsson, K. Högdahl
{"title":"Cobalt enrichment in some ores of the Bergslagen province, south central Sweden","authors":"E. Jonsson, K. Högdahl","doi":"10.1080/11035897.2023.2168046","DOIUrl":"https://doi.org/10.1080/11035897.2023.2168046","url":null,"abstract":"ABSTRACT The presence of cobalt (Co) in sulphide deposits or sulphide-bearing iron oxide deposits in and around the Palaeoproterozoic Bergslagen ore province, south central Sweden, led to focused mining and extraction of this metal, particularly during the nineteenth century. Today, Co is considered a critical metal in the EU and among the more sought-after raw materials, not least due to its use in batteries for the rapidly increasing production of electric vehicles. Here we report new observations and data on Co concentrations in variably mineralised and not necessarily statistically representative samples from a suite of mainly skarn-hosted, at least locally, sulphide-dominated mineralisations from Bergslagen. While several localities that exhibit substantial Co concentrations represent deposits previously known to carry this metal (generally in a field/district or specifically in a mine), the majority are from mines or prospects in which the presence of Co have been hitherto unknown. Several of them share the enrichment of, e.g., Co and Cu, but the overall picture is one of more complex interrelations between the variable metal endowments in the known occurrences of Co in this province. While representing a modest dataset, our new observations complement previously available information on the occurrence of Co in Bergslagen and highlights both the need for, and potential of, new and more detailed studies on the distribution, mineralogy and origin of Co as well as other critical or near-critical metals in this and other ore provinces in Sweden.","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46238128","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}