4区地球科学

Gff Pub Date : 2023-10-26 DOI: 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compiling data from literature and unpublished reports a more detailed description is presented on the geographical and stratigraphic distribution of the Alum Shale Formation (ASF) and correlateable units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}

引用次数: 0

Shell injuries, repair and malformation in the early Cambrian mollusc Helcionella antiqua from Scania, Sweden 瑞典斯堪尼亚早寒武纪软体动物古Helcionella的壳损伤、修复和畸形

IF 1 4区地球科学

Gff Pub Date : 2023-08-10 DOI: 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}

引用次数: 0

Stable carbon and oxygen isotope geochemistry as provenance indicator for the picture stones on Gotland (Sweden) 稳定碳、氧同位素地球化学作为瑞典哥特兰画像石的物源指示

IF 1 4区地球科学

Gff Pub Date : 2023-08-02 DOI: 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}

引用次数: 0

Unusual cystoporate? bryozoan from the Upper Ordovician of Siljan District, Dalarna, central Sweden 不寻常的膀胱蒸发？瑞典中部达拉纳Siljan区上奥陶世苔藓虫

IF 1 4区地球科学

Gff Pub Date : 2023-08-01 DOI: 10.1080/11035897.2023.2223579

A. Ernst, Z. Tolokonnikova

引用次数: 0

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 斯堪的纳维亚加里东尼德斯中部Ottfjället岩脉群的U-Pb锆石年龄:对波罗的海岩脉群、Iapetus洋的打开和新元古代波罗的海冰川形成时间的新限制——对新元古代波罗的海冰川形成年龄的评述

IF 1 4区地球科学

Gff Pub Date : 2023-07-25 DOI: 10.1080/11035897.2023.2233569

Risto A. Kumpulainen, Mike A. Hamilton, Ulf Söderlund, Johan Petter Nystuen

引用次数: 0

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 波罗的海最南部地区(Gdańsk IG1钻孔)晚古元古代沉积与中元古代变质作用:独居石与锆石、化学与同位素年龄记录

IF 1 4区地球科学

Gff Pub Date : 2023-06-15 DOI: 10.1080/11035897.2023.2205891

Dominik Gurba, Anna Grabarczyk-Gurba, E. Krzemińska

引用次数: 0

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 斯堪的纳维亚中部Caledonides Ottfjället堤群的U-Pb年龄:对伊迪亚卡拉纪Iapetus洋开放和波罗的海冰川作用的新限制——对新元古代冰川作用年龄推断的评论

IF 1 4区地球科学

Gff Pub Date : 2023-06-14 DOI: 10.1080/11035897.2023.2205893

A. Rice

引用次数: 3

Emendment to the term complex in: “Guide for geological nomenclature in Sweden” (Kumpulainen 2016) “瑞典地质命名指南”（Kumpulainen 2016）中对“复合体”一词的修订

IF 1 4区地球科学

Gff Pub Date : 2023-05-18 DOI: 10.1080/11035897.2023.2201321

U. Andersson, Nils Jansson, Linda M. Wickström, S. Bergman, R. Kumpulainen, M. Johnson, M. Olvmo, Stephen McLoughlin, M. Calner

引用次数: 0

Prehistory of an enigmatic mineral: hisingerite 一种神秘矿物的史前史：希闪长岩

IF 1 4区地球科学

Gff Pub Date : 2023-04-04 DOI: 10.1080/11035897.2023.2187079

D. Holtstam

引用次数: 0

Cobalt enrichment in some ores of the Bergslagen province, south central Sweden 瑞典中南部伯格斯拉根省部分矿石中的钴富集

IF 1 4区地球科学

Gff Pub Date : 2023-02-21 DOI: 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}

引用次数: 0

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