IF 1 4区地球科学

Gff Pub Date : 2022-12-15 DOI: 10.1080/11035897.2022.2147214

K. Billström, J. Söderhielm, C. Broman, K. Sundblad

{"title":"Solstad, a Co-Se-bearing copper ore in the Västervik quartzites, Sweden","authors":"K. Billström, J. Söderhielm, C. Broman, K. Sundblad","doi":"10.1080/11035897.2022.2147214","DOIUrl":"https://doi.org/10.1080/11035897.2022.2147214","url":null,"abstract":"ABSTRACT\u0000 The Solstad copper deposit, located in SE Sweden, is hosted by a quartz-rich rock sliver surrounded by a granite belonging to the 1.8 Ga Transscandinavian Igneous Belt. Ore petrographic studies have revealed a number of previously unrecognized opaque phases, including several Co phases, selenides and tellurides. Based on an in situ U-Pb investigation of zircons from a mineralized sample, it is suggested that zircons have a detrital origin and that the quartz-rich host rock is a xenolith belonging to the c. 1.88–1.86 Ga Västervik quartzite formation. A low-radiogenic galena sample implies that the source for the metals in the ore has a primitive origin, probably the basaltic lavas (now amphibolites) that are intercalated in the Västervik quartzite. Fluid inclusion studies in quartz distinguish four distinct ore fluids: (1) a hypersaline halite-bearing aqueous fluid related to an early (1.85–1.86 Ga) chalcopyrite depositional stage, (2) a subsequent CO2-rich fluid, that deposited native gold, tellurides, selenides and bismuthinite, developed (at ≥1.8 Ga) as a result of a phase separation, (3), a moderate- to high-salinity aqueous fluid did also develop at this event and led to the deposition of bornite and (4) a concluding, low-salinity aqueous fluid stage (at ≤1.8 Ga) caused oxidation to covelline and digenite of previously formed phases. It is proposed that the Solstad deposit and other Cu ± Co-rich sulphide (± magnetite) occurrences in the Västervik region along the southernmost margin of the 1.9–1.8 Ga Svecofennian Domain, represent a distinct ore type associated with quartzites and amphibolites.","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41410035","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

Hydrothermal alteration, lithogeochemical marker units and vectors towards mineralisation at the Svärdsjö Zn-Pb-Cu deposit, Bergslagen, Sweden 瑞典Bergslagen Svärdsjö Zn-Pb-Cu矿床热液蚀变、岩石地球化学标志单元及成矿方向

IF 1 4区地球科学

Gff Pub Date : 2022-10-03 DOI: 10.1080/11035897.2022.2120065

Anton Fahlvik, T. C. Kampmann, N. Jansson

{"title":"Hydrothermal alteration, lithogeochemical marker units and vectors towards mineralisation at the Svärdsjö Zn-Pb-Cu deposit, Bergslagen, Sweden","authors":"Anton Fahlvik, T. C. Kampmann, N. Jansson","doi":"10.1080/11035897.2022.2120065","DOIUrl":"https://doi.org/10.1080/11035897.2022.2120065","url":null,"abstract":"ABSTRACT The Svärdsjö Zn-Pb-Cu deposit is situated in the heavily mineralised Bergslagen lithotectonic unit of the Fennoscandian shield, south-central Sweden. Intense hydrothermal alteration followed by a strong overprint by deformation and metamorphism during the Svecokarelian orogeny complicate interpretation of the local geology. Integration of whole-rock lithogeochemical and petrographic methods has allowed the mainly dacitic volcanic host succession and effects of ore-related hydrothermal alteration to be characterised. Mineralisation is hosted by 2–15 m thick, commonly skarn-altered dolomitic marble interbeds. Zones of strong–intense hydrothermal chlorite-sericite alteration envelop the marble units, recording mass gains of Fe and Mg, as well as Na depletion. Minerals such as cordierite, anthophyllite and sillimanite formed in these rocks during regional metamorphism. Mineralisation via sub-seafloor replacement is suggested for the deposit based on alteration zoning and the irregular, stratabound, marble-hosted style of sulphide lenses. It is inferred that mineralisation formed via neutralisation of hot, acidic metalliferous fluids. Geochemically and lithologically distinct units adjacent to the mineralised zones can serve as marker units to aid further exploration in the area. Mass change calculations reveal that Fe and Mg enrichment, as well as Na depletion exhibit detectable changes extending up to 100 m from the mineralised lenses, providing exploration vectors.","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49230282","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: 1

Hitherto undetected pore-canal network in the shell wall of the Ordovician Orthoceras from Baltoscandia (Cephalopoda: orthoceratida, calciosiphonata) 巴尔托斯坎迪亚奥陶系正角兽壳壁上迄今未发现的孔管网络(头足纲:正角兽目，钙化角兽目)

IF 1 4区地球科学

Gff Pub Date : 2022-09-27 DOI: 10.1080/11035897.2022.2042377

H. Mutvei

{"title":"Hitherto undetected pore-canal network in the shell wall of the Ordovician Orthoceras from Baltoscandia (Cephalopoda: orthoceratida, calciosiphonata)","authors":"H. Mutvei","doi":"10.1080/11035897.2022.2042377","DOIUrl":"https://doi.org/10.1080/11035897.2022.2042377","url":null,"abstract":"ABSTRACT The structure of the shell wall in the Ordovician Orthoceras differs from that in the extant Nautilus. It consists of two equal thick layers: an outer probably nacreous layer and an inner prismatic layer. The two layers are separated from each other by a thin intermediate sub-layer that is rich in organic substance and has indistinct boundaries. The intermediate sub-layer and the inner prismatic layer contain a hitherto undetected pore-canal network that consists of vertical and horizontal canals. Horizontal canals are arranged in a single layer in the outermost part of the intermediate sub-layer. The vertical canals are arranged in parallel rows, and the canals in each row open into one of the horizontal canals. The canals have thin walls of calcified organic fibres. The walls are preserved in the intermediate sub-layer, whereas in the inner prismatic layer, they are partially dissolved. The canal network is absent in the shell wall of the extant Nautilus, but the horizontal canals occur in the shell wall of the Carboniferous orthocerid-like coleoid Mitorthoceras and the bactritid-like coleoid Shimanskya. Thus, the pore-canal network had an important, still unknown, function for the animal, and it existed, without changes, at least 150 ma.","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47280354","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: 1

The Middle Ordovician Jinonicella (Mollusca) from Belarus and Ukraine 白俄罗斯和乌克兰的中奥陶世Jinonicella（软体动物）

IF 1 4区地球科学

Gff Pub Date : 2022-04-03 DOI: 10.1080/11035897.2022.2047773

A. Gubanov, S. Bakayeva, J. R. Ebbestad, O. Bogolepova

引用次数: 0

The oldest tongue worm: a stem-group pentastomid arthropod from the early middle Cambrian (Wuliuan Stage) of North Greenland (Laurentia) 最古老的舌虫：北格陵兰早中寒武纪（五原阶）的一种茎群五口节肢动物

IF 1 4区地球科学

Gff Pub Date : 2022-04-03 DOI: 10.1080/11035897.2022.2064543

J. S. Peel

引用次数: 3

The Holocene of Sweden – a review 瑞典全新世——综述

IF 1 4区地球科学

Gff Pub Date : 2022-04-03 DOI: 10.1080/11035897.2022.2086290

S. Wastegård

{"title":"The Holocene of Sweden – a review","authors":"S. Wastegård","doi":"10.1080/11035897.2022.2086290","DOIUrl":"https://doi.org/10.1080/11035897.2022.2086290","url":null,"abstract":"ABSTRACT This paper presents a review on more than hundred years of palaeoenvironmental research in Sweden; from early descriptions of peat and tufa deposits in the late nineteenth and early twentieth centuries to multiproxy transfer function studies in the late twentieth and early twenty-first centuries CE. Research on Holocene climate variability has a long history in Sweden and many ideas and concepts about changes in temperature and precipitation during the Holocene originated in Fennoscandia. The Holocene climate evolution in Sweden follows a pattern in common for many northern latitude records with a rapid warming starting at the Pleistocene–Holocene boundary at c. 11 650 cal a BP, followed by the middle Holocene thermal maximum between c. 8000 and 5000 cal a BP. A change to colder and wetter conditions starts c. 4000 cal a BP and lasts until the late 1800 s CE. There is evidence for climatic anomalies such as the 8.2 and 4.2 ka BP events and the Little Ice Age (LIA) but only inconclusive evidence for other events, such as the 10.3 ka BP event. The main pattern of Holocene climate and environmental evolution is well known for most parts of Sweden, but the present review also shows that several research questions remain to be addressed.","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47048016","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: 2

Contrasting coronas: microscale fluid variation deduced from monazite breakdown products in altered metavolcanic rocks associated with the Grängesberg apatite-iron oxide ore, Bergslagen, Sweden 对比日冕:从与Grängesberg磷灰石氧化铁矿石相关的蚀变变质火山岩中独居石分解产物推断出的微尺度流体变化

IF 1 4区地球科学

Gff Pub Date : 2022-04-03 DOI: 10.1080/11035897.2022.2083224

J. Majka, Adam Włodek, E. Jonsson, K. Högdahl

引用次数: 1

New encrusting tentaculitoids from the Silurian of Estonia and taxonomic status of Anticalyptraea Quenstedt, 1867 爱沙尼亚志留纪新发现的包壳触手类和昆斯特Anticalyptraea Quenstedt的分类地位，1867

IF 1 4区地球科学

Gff Pub Date : 2022-04-03 DOI: 10.1080/11035897.2022.2042378

M. Zatoń, O. Vinn, U. Toom, J. Słowiński

{"title":"New encrusting tentaculitoids from the Silurian of Estonia and taxonomic status of Anticalyptraea Quenstedt, 1867","authors":"M. Zatoń, O. Vinn, U. Toom, J. Słowiński","doi":"10.1080/11035897.2022.2042378","DOIUrl":"https://doi.org/10.1080/11035897.2022.2042378","url":null,"abstract":"ABSTRACT A new genus and species of encrusting tentaculitoid, Lindstroemiella eichwaldi, from the Silurian (Ludfordian Stage, Ludlow) of Saaremaa Island in Estonia, is described. This tentaculitoid shares common structural features (inwardly directed pseudopunctae and vesicles) with Anticalyptraea, but differs from the latter in having a spirally coiled, microconchid-like shell with a variously oriented aperture, thin and sharp transverse ridges and lacking an inverted cone-like morphology. Unlike other tentaculitoids (microconchids, trypanoporids, cornulitids), these encrusters, unique with respect to morphology and shell structure, have so far not been taxonomically classified at the ordinal level. Now, taking into account that such tentaculitoids are taxonomically and morphologically more diverse than previously assumed, we propose to include them in a separate order Anticalyptraeida. Unlike microconchids and cornulitids, anticalyptraeids are the least studied group of tentaculitoids and thus poorly recognized. In part, this may be due to their misidentification with associated spirally coiled microconchids, to which anticalyptraeids are very similar at juvenile stages. http://www.zoobank.org/lsid:zoobank.org:act:C1E9D9A4-555E-4F5A-BEDC-8046CCA58BD9","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46404774","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: 2

Inversion tectonics in the Sorgenfrei–Tornquist Zone: insight from new marine seismic data at the Bornholm Gat, SW Baltic Sea Sorgenfrei–Tornquist带的反转构造：从波罗的海西南部Bornholm Gat的新海洋地震数据中获得的见解

IF 1 4区地球科学

Gff Pub Date : 2022-04-03 DOI: 10.1080/11035897.2022.2071335

Yaocen Pan, E. Seidel, C. Juhlin, Christian Hübscher, D. Sopher

{"title":"Inversion tectonics in the Sorgenfrei–Tornquist Zone: insight from new marine seismic data at the Bornholm Gat, SW Baltic Sea","authors":"Yaocen Pan, E. Seidel, C. Juhlin, Christian Hübscher, D. Sopher","doi":"10.1080/11035897.2022.2071335","DOIUrl":"https://doi.org/10.1080/11035897.2022.2071335","url":null,"abstract":"ABSTRACT New seismic profiles located within the Bornholm Gat in the SW Baltic Sea area image Late Cretaceous-Paleogene inversion and exhumation of a previously poorly characterized narrow crustal zone in the southern end of the Sorgenfrei–Tornquist Zone (STZ), a long pre-Alpine tectonic lineament in Europe. Thrusts and pop-up structures developed along the inversion axis accompanied by subsidence troughs on its sides. Stratigraphic analysis of chalk deposits indicates that structural shortening and inversion resulted from compressional deformation. Marginal troughs formed synchronously to inversion and adjacent to the tectonically active slope, where sediment redeposition was focused. Deposition of chalk units, composed predominantly of contourites and gravity-driven sedimentation were largely controlled by inversion tectonics and influenced by intensification of bottom currents. We find that allochthonous chalk has been buried in horizontally deposited autochthonous (pelagic) chalk. An erosional unconformity represents the base of the Maastrichtian and marks the onset of along slope deposition due to a more hydrodynamic environment. The revealed asymmetric inversion across the STZ with fold tightening and superposition of NE-NW folds attest to more than one pulse during the Late Cretaceous-Cenozoic inversion. The STZ may belong to the end-member mode of intraplate foreland basins resulting from a far-field NE-SW compression transmitted from the Africa-Iberia-Europe convergence. The intraplate stress associated with the following Maastrichtian enhanced collisional coupling between the Alpine-Carpathian orogen and its foreland, which is widely recognized (e.g., the Mid-Polish Trough, the Bohemian Massif and the Central Graben), may also have had its maximum extent to the northeast in southern Sweden.","PeriodicalId":55094,"journal":{"name":"Gff","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2022-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47137508","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: 2

A new dallasiellid shark from the lower Campanian (Upper Cretaceous) of Sweden 瑞典下坎潘阶（上白垩纪）的一种新的dallasielid鲨鱼

IF 1 4区地球科学

Gff Pub Date : 2022-04-03 DOI: 10.1080/11035897.2022.2097737

Mikael Siversson, P. Cederström, H. E. Ryan

引用次数: 1

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