Acta Geologica Polonica最新文献_第7页

Zirconium silicates in a peralkaline granite: a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland) 过碱性花岗岩中的硅酸锆:岩浆和热液相互作用的记录(Ilímaussaq杂岩，格陵兰)

IF 1.1 4区地球科学

Acta Geologica Polonica Pub Date : 2023-07-20 DOI: 10.24425/agp.2022.140427

Małgorzata Cegiełka, B. Bagiński, R. Macdonald, H. Belkin, J. Kotowski, B. Upton

{"title":"Zirconium silicates in a peralkaline granite: a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland)","authors":"Małgorzata Cegiełka, B. Bagiński, R. Macdonald, H. Belkin, J. Kotowski, B. Upton","doi":"10.24425/agp.2022.140427","DOIUrl":"https://doi.org/10.24425/agp.2022.140427","url":null,"abstract":": Cegiełka, M., Bagiński, B., MacDonald, R., Belkin, H.E., Kotowski, J. and Upton, B.G.J. 2022. Zirconium silicates in a peralkaline granite: a record of the interplay of magmatic and hydrothermal processes (Ilímaussaq complex, Greenland). Acta Geologica Polonica , 72 (2), 235–245. Warszawa. Compositional and textural data are presented for zircon, secondary Zr-silicates, catapleiite and elpidite in a peralkaline granite from the Ilímaussaq complex, south Greenland. The zircon is essentially stoichiometric, with (Zr + Hf + Si) = 1.96–1.98 a.p.f.u. The secondary Zr-silicates show a wide range of Zr/Si atomic ratios (0.13–0.79). The catapleiite varies from close to stoichiometric to a Na-depleted type showing cation deficiency (5.2–5.8 a.p.f.u.). Elpidite shows similar variations (7.2–9.0 a.p.f.u.). Textural relationships between the Zr phases are interpreted to show that magmatic zircon interacted with hydrous fluids exsolved from the magma to form the secondary Zr-silicates. Formation of catapleiite was late-magmatic, in equilibrium with a Na-Si-bearing fluid. This was followed by the crystallization of elpidite, the fluid having a different Na/Si ratio. Both catapleiite and elpidite experienced Na-loss during late-stage hydrothermal alteration.","PeriodicalId":7030,"journal":{"name":"Acta Geologica Polonica","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44482022","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

Depositional conditions of the Upper Younger Loess during the Last Glacial Maximum in central and eastern Europe 末次盛冰期中欧和东欧上新黄土沉积条件

IF 1.1 4区地球科学

Acta Geologica Polonica Pub Date : 2023-07-20 DOI: 10.24425/agp.2022.142642

J. Dzierżek, L. Lindner, R. Chlebowski, M. Szymanek, Andriy Bogucki, O. Tomeniuk

{"title":"Depositional conditions of the Upper Younger Loess during the Last Glacial Maximum in central and eastern Europe","authors":"J. Dzierżek, L. Lindner, R. Chlebowski, M. Szymanek, Andriy Bogucki, O. Tomeniuk","doi":"10.24425/agp.2022.142642","DOIUrl":"https://doi.org/10.24425/agp.2022.142642","url":null,"abstract":": Dzierżek, J., Lindner, L., Chlebowski, R., Szymanek, M., Bogucki, A. and Tomeniuk, O. 2022. Depositional conditions of the Upper Younger Loess during the Last Glacial Maximum in central and eastern Europe. Acta Geologica Polonica , 72 (4), 369–389. Warszawa. This paper is a summary of the results of research on the accumulation conditions of the Upper Younger Loess (LMg) in Poland and Bug loess (bg) in Ukraine from the maximum stage (MIS 2) of the Vistulian (Weichselian) Glaciation in central and eastern Europe. These studies included an analysis of the morphological (topographic) situation of the loess cover, its grain size and heavy mineral composition, the preserved structures of loess sed - imentation as well as mollusc and pollen analyses of this loess. They revealed that the accumulation of Upper Younger Loess (UYL) might have been more dependent on the prevailing moisture conditions than previously thought. These conditions could have been caused by cold air masses from an ice sheet and warm air masses from the Mediterranean Sea and Atlantic coming together in the Carpathians and the Holy Cross Mountains and favouring the formation of dust storms and precipitation. In this process, a loading of loess dust (formed from local rocks weathering in periglacial conditions) by atmospheric moisture particles was especially significant. The moist substrate not only favoured the periodic development of vegetation and molluscs but also enabled the interception of dust and the accumulation of an increasingly thick loess cover. Westerly and south-westerly winds predominated in the UYL as indicated by the topographic position of loess patches and the mineral composition of the studied loess. Periodically an increased air circulation from the east and northeast occurred.","PeriodicalId":7030,"journal":{"name":"Acta Geologica Polonica","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46831883","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

Provenance of quartz debris in the Central Western Carpathians at the end of the Triassic, as indicated by cathodoluminescence colours 三叠纪末喀尔巴阡山脉中西部石英碎屑的来源，用阴极发光颜色表示

IF 1.1 4区地球科学

Acta Geologica Polonica Pub Date : 2023-07-20 DOI: 10.24425/agp.2022.143595

Marek Vďačný

{"title":"Provenance of quartz debris in the Central Western Carpathians at the end of the Triassic, as indicated by cathodoluminescence colours","authors":"Marek Vďačný","doi":"10.24425/agp.2022.143595","DOIUrl":"https://doi.org/10.24425/agp.2022.143595","url":null,"abstract":": Vďačný, M. and Michalík, J. 2023. Provenance of quartz debris in the Central Western Carpathians at the end of the Triassic, as indicated by cathodoluminescence colours. Acta Geologica Polonica , 73 (1), 103–114. Warszawa. Lithic fragments including quartz grains occur infrequently in the shallow-marine limestone sequence of the Fatra Formation deposited in the tensional intra-shelf depression of the Central Western Carpathians during the Rhaetian. Nevertheless, their study can bring data answering questions of sources, palaeogeodynamic arrange - ment, and processes at the end of the Triassic. In this study, we examined optically the cathodoluminescence (CL) colours of single quartz grains from the Kardolína section (Tatra Mts, Slovakia). These colours reveal a dominance of grains derived from regionally metamorphosed and plutonic rocks. Grains of hydrothermal and pegmatite origin are less frequent. Some of the quartz grains show recycled cement rims suggesting at least a second cycle origin. This sedimentary basin was situated near to the passive margin formed by the Variscan consolidated terrains of the Vindelician Highlands. Our study of the CL colours of quartz grains contributes to the elucidation of the nature of the rocks of the vanished Vindelician mountain belt.","PeriodicalId":7030,"journal":{"name":"Acta Geologica Polonica","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47351288","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

A tyrannosaurid pedal ungual from the Williams Fork Formation (Campanian) of Colorado and its implications for the biogeography of Laramidian dinosaurs 科罗拉多州Williams Fork组（Campanian）的一种霸王龙踏板有蹄类及其对Laramidian恐龙生物地理学的影响

IF 1.1 4区地球科学

Acta Geologica Polonica Pub Date : 2023-07-20 DOI: 10.24425/agp.2022.140433

Chan-gyu Yun

引用次数: 0

Discussion on Radwańska, U. Selected Oxfordian brachiopods from Zalas (Cracow Upland, Poland), Acta Geologica Polonica, vol. 67, no. 3, 2017 关于Radwańska的讨论，U.《波兰克拉科夫高地Zalas的牛津腕足动物选集》，《波兰地质学报》，第67卷，第6期。3, 2017

IF 1.1 4区地球科学

Acta Geologica Polonica Pub Date : 2023-07-20 DOI: 10.24425/agp.2019.126435

引用次数: 0

143596 one hundred and forty-three thousand five hundred and ninety-six

IF 1.1 4区地球科学

Acta Geologica Polonica Pub Date : 2023-07-20 DOI: 10.24425/agp.2022.143596

引用次数: 0

Campanian–Paleocene Jaworzynka Formation in its type area (Magura Nappe, Outer Carpathians) Campanian–古新世Jaworzynka组在其类型区域（Magura Nappe，外喀尔巴阡山脉）

IF 1.1 4区地球科学

Acta Geologica Polonica Pub Date : 2023-07-20 DOI: 10.24425/AGP.2020.134562

A. Waśkowska, J. Golonka, K. Starzec, M. Cieszkowski

{"title":"Campanian–Paleocene Jaworzynka Formation in its type area (Magura Nappe, Outer Carpathians)","authors":"A. Waśkowska, J. Golonka, K. Starzec, M. Cieszkowski","doi":"10.24425/AGP.2020.134562","DOIUrl":"https://doi.org/10.24425/AGP.2020.134562","url":null,"abstract":"The Campanian–Paleocene Jaworzynka Formation, a part of the Magura Nappe succession in the Polish Outer Carpathians, is described in terms of its detailed litho- and biostratigraphy. The formation stretches along the marginal part of the Siary Unit, from the Jaworzynka stratotype area in the Silesian Beskid Mts up to the Mszana Dolna area in the Beskid Wyspowy Mts. Its equivalent in the Moravskoslezske Beskydy Mts of the Czech Republic is the Solaň Formation. In the stratotype area, the formation displays complex structure. We distinguish four lithological units, i.e. Biotite Sandstone and Shale (I), Shale (II), Mutne Sandstone Member (III) and Thin-bedded Turbidite (IV) and provide the first detailed biostratigraphy of particular units. The first unit forms the most prominent part of the formation. It was deposited in the Middle Campanian–earliest Maastrichtian within the upper part of Caudammina gigantea Zone up to the lower part of the Rzehakina inclusa Zone. The second unit occurs only locally and its age is limited to the Maastrichtian, to the Rzehakina inclusa Zone. The third unit is composed of thick-bedded sandstones that in some parts may form more than the half of the total thickness of the formation. It is Late Maastrichtian–Danian in age and is placed in the upper part of the Rzehakina inclusa Zone and the lower part of the Rzehakina fissistomata Zone. It is usually covered by a thin package of thin-bedded turbiditic sandstone and shales of Danian–Thanetian age with foraminifera of the Rzehakina fissistomata Zone.","PeriodicalId":7030,"journal":{"name":"Acta Geologica Polonica","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46815095","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: 3

Native silver in the eastern part of the Karkonosze granitoid pluton, Lower Silesia, Poland 波兰下西里西亚Karkonosze花岗岩体东部的天然银

IF 1.1 4区地球科学

Acta Geologica Polonica Pub Date : 2023-06-27 DOI: 10.24425/agp.2023.145617

Andrzej Kozłowski, Witold Matyszczak

引用次数: 0

The first trigonotarbid arachnid from Ukraine 乌克兰第一种三角纲纲蛛形纲动物

IF 1.1 4区地球科学

Acta Geologica Polonica Pub Date : 2023-06-27 DOI: 10.24425/agp.2022.143600

J. Dunlop, V. Dernov

引用次数: 0

Coexistence of algae and a graptolite-like problematicum: a case study from the late Silurian of Podolia (Ukraine) 藻类和类似笔石的问题共存：波德托利亚志留纪晚期（乌克兰）的一个案例研究

IF 1.1 4区地球科学

Acta Geologica Polonica Pub Date : 2023-06-27 DOI: 10.24425/agp.2022.143599

S. Skompski, Anna Kozłowska, Wojciech Kozłowski, P. Łuczyński

{"title":"Coexistence of algae and a graptolite-like problematicum: a case study from the late Silurian of Podolia (Ukraine)","authors":"S. Skompski, Anna Kozłowska, Wojciech Kozłowski, P. Łuczyński","doi":"10.24425/agp.2022.143599","DOIUrl":"https://doi.org/10.24425/agp.2022.143599","url":null,"abstract":": Skompski, S., Kozłowska, A., Kozłowski, W. and Łuczyński, P. 2023. Coexistence of algae and a graptolite-like problematicum: a case study from the late Silurian of Podolia (Ukraine). Acta Geologica Polonica , 73 (2), 115–133. Warszawa. This contribution presents the record of an abundant assemblage of well-preserved, thallophytic noncalcified algae and of an epibiotic form that has been recognised as a putative graptolite from the upper Silurian (Ludlow, Gorstian–Ludfordian) of Podolia (western part of Ukraine). The sediments represent a shallow peritidal zone of the shelf. A new genus and species, Voronocladus dryganti , belonging to the Dasycladales Pascher, 1931, is established. Most of the specimens representing the algal thallus are overgrown by problematical epibiotic graptolites, described as Podoliagraptus algaeoides gen. et sp. nov. This phenomenon is explained as an epi - phytic mode of life of the putative graptolite on algae, and is herein compared to recently known coexistences of algae with other organisms. The excellent state of preservation, and the abundance of studied Dasycladales algae and epibiotic problematics indicate that the investigated mudstone layer can be treated as a ‘Konservat Lagerstätte’ sensu Seilacher (1970).","PeriodicalId":7030,"journal":{"name":"Acta Geologica Polonica","volume":" ","pages":""},"PeriodicalIF":1.1,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43156914","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