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Brazilian Journal of Geology最新文献

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Turbidity currents generating lobes: flow rate influence on 3D experiments without slope break 浊流产生叶:流量对无坡折三维实验的影响
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220220029
Tulio Machado Humberto Guimarães, D. Koller, J. Fedele, Rafael Manica
{"title":"Turbidity currents generating lobes: flow rate influence on 3D experiments without slope break","authors":"Tulio Machado Humberto Guimarães, D. Koller, J. Fedele, Rafael Manica","doi":"10.1590/2317-4889202220220029","DOIUrl":"https://doi.org/10.1590/2317-4889202220220029","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"25 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73196739","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
Three-dimensional geological modeling of the Itataia Phosphate-Uranium Deposit (Ceará, Brazil) Itataia(巴西ceear<e:1>)磷铀矿三维地质建模
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210022
Ronaldo Cavalcante Freire, Cesar Ulisses Vieira Veríssimo, C. V. Parente, J.A. Nogueira Neto, Givaldo Lessa Castro, José Roberto de Alcântara e Silva
{"title":"Three-dimensional geological modeling of the Itataia Phosphate-Uranium Deposit (Ceará, Brazil)","authors":"Ronaldo Cavalcante Freire, Cesar Ulisses Vieira Veríssimo, C. V. Parente, J.A. Nogueira Neto, Givaldo Lessa Castro, José Roberto de Alcântara e Silva","doi":"10.1590/2317-4889202220210022","DOIUrl":"https://doi.org/10.1590/2317-4889202220210022","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"1 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73202947","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
Regional high-grade metamorphic peak imprint in zircons from the mafic-ultramafic Jacurici Complex, São Francisco Craton, Brazil 巴西<s:1>奥弗朗西斯科克拉通镁铁质-超镁铁质Jacurici杂岩锆石中的区域高变质峰印记
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202120210007
J. Dias, J. Marques, G. Bertolini, J. Frantz, B. Friedrich, J. C. Paim, Carlos José Sobrinho da Silveira, Waldemir José Alves Queiroz
{"title":"Regional high-grade metamorphic peak imprint in zircons from the mafic-ultramafic Jacurici Complex, São Francisco Craton, Brazil","authors":"J. Dias, J. Marques, G. Bertolini, J. Frantz, B. Friedrich, J. C. Paim, Carlos José Sobrinho da Silveira, Waldemir José Alves Queiroz","doi":"10.1590/2317-4889202120210007","DOIUrl":"https://doi.org/10.1590/2317-4889202120210007","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"51 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82266652","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
Sedimentary and tectonic breccias at the base of the Ediacaran Tamengo Formation (Corumbá Group): a comparative study 埃迪卡拉系Tamengo组(corumb<e:1>群)基底沉积角砾岩与构造角砾岩的对比研究
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210062
H. A. Fernandes, P. Boggiani, J. Afonso, K. Amorim, R. Trindade
{"title":"Sedimentary and tectonic breccias at the base of the Ediacaran Tamengo Formation (Corumbá Group): a comparative study","authors":"H. A. Fernandes, P. Boggiani, J. Afonso, K. Amorim, R. Trindade","doi":"10.1590/2317-4889202220210062","DOIUrl":"https://doi.org/10.1590/2317-4889202220210062","url":null,"abstract":"The Corumbá Group is a Neoproterozoic succession of terrigenous and carbonate sedimentary rocks located at the southern Paraguay Belt, central Brazil. The upper units of the Corumbá Group include the Ediacaran carbonate Bocaina and Tamengo formations, whose limit is characterized by polymictic breccias recognized in several sites from Corumbá to Serra da Bodoquena, Mato Grosso do Sul. Despite the widespread occurrence, the breccias are poorly described and their origin is uncertain. The aim of this study is to present the differences between sedimentary and tectonic breccias of the Corumbá Group and propose a genesis model for each. The sedimentary breccias comprise mainly matrix-supported chaotic facies that formed by submarine mass flows on slope aprons. Sea level fall and/or increased faulting rates exposed the underlying units and triggered the gravity fluxes by creating a steep slope. The base of the sedimentary breccia represents a major unconformity within the carbonate sedimentation of the Corumbá Group, with potential correlation to other Ediacaran units. The subsequent development of the Paraguay fold-thrust belt caused the formation of tectonic breccias in reverse fault zones. Cataclasis and mylonitization deformed the dolomitic host rock by fracturing and produced a fine foliated matrix.","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"23 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80109167","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
U-Pb zircon xenocrysts dating as a proxy to assess volcanic assimilation and the underlying crust, Cretaceous Jaguarão Formation, RS, Brazil 用U-Pb锆石异种结晶测年评价火山同化作用和下伏地壳，巴西RS白垩纪jaguar<e:1>组
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210063
Vicente Araújo, J. Marques, G. Bertolini, J. Frantz
{"title":"U-Pb zircon xenocrysts dating as a proxy to assess volcanic assimilation and the underlying crust, Cretaceous Jaguarão Formation, RS, Brazil","authors":"Vicente Araújo, J. Marques, G. Bertolini, J. Frantz","doi":"10.1590/2317-4889202220210063","DOIUrl":"https://doi.org/10.1590/2317-4889202220210063","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"11 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84177551","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
Geothermobarometry and geochemical modeling of Archean charnockites from Carajás Province, Amazonian craton, Brazil 巴西亚马逊克拉通Carajás省太古宙charnockites的地温大气特征及地球化学模拟
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210092
Bhrenno Marangoanha, D. Oliveira, C. Lamarão, G. T. Marques, L. Silva
{"title":"Geothermobarometry and geochemical modeling of Archean charnockites from Carajás Province, Amazonian craton, Brazil","authors":"Bhrenno Marangoanha, D. Oliveira, C. Lamarão, G. T. Marques, L. Silva","doi":"10.1590/2317-4889202220210092","DOIUrl":"https://doi.org/10.1590/2317-4889202220210092","url":null,"abstract":"Orthopyroxene-bearing tonalites/trondhjemites with scarce quartz diorites comprise the Café enderbite that crops out in three Neoarchean plutons in the central portion of the Canaã dos Carajás domain, Carajás Province, northern Brazil. Intrinsic parameters based on the mineral chemistry of plagioclase, biotite, amphibole, and pyroxene constrain crystallization conditions to 1150–850°C and 750–600 MPa, moderate water content in the melt (4.8–5.6 wt.%) and relatively oxidizing conditions, between the fayalite–magnetite–quartz (FMQ) and nickel– nickel oxide (NNO) + 1.7 buffers. Geochemical modeling indicates that the Café enderbite evolved via at least two fractional crystallization stages – quartz diorite to orthopyroxene tonalite and orthopyroxene tonalite to orthopyroxene trondhjemite – with high crystal content (45–60%, or even higher). This high crystal content during fractional crystallization was the key factor to the preservation of orthopyroxene in the magmatic system as it left only a relatively small proportion of melt to react with early-formed orthopyroxene.","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"10 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80958962","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
Spectral characterization of the Umbuzeiro Doce skarn target (Brazil): insights for the exploration of a W-Mo-gemological vesuvianite system Umbuzeiro Doce矽卡岩靶区(巴西)的光谱表征:对w - mo宝石学维苏岩系统探索的见解
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220220035
L. Silva, T. A. Carrino, Lauro Santos, R. E. C. Pabón
{"title":"Spectral characterization of the Umbuzeiro Doce skarn target (Brazil): insights for the exploration of a W-Mo-gemological vesuvianite system","authors":"L. Silva, T. A. Carrino, Lauro Santos, R. E. C. Pabón","doi":"10.1590/2317-4889202220220035","DOIUrl":"https://doi.org/10.1590/2317-4889202220220035","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"42 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87273018","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
Seasonal variations in the backscatter of RADARSAT-1 images in tropical coastal environments 热带沿海环境下RADARSAT-1图像后向散射的季节变化
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210077
Sheila Gatinho Teixeira, P. W. M. S. Souza Filho
{"title":"Seasonal variations in the backscatter of RADARSAT-1 images in tropical coastal environments","authors":"Sheila Gatinho Teixeira, P. W. M. S. Souza Filho","doi":"10.1590/2317-4889202220210077","DOIUrl":"https://doi.org/10.1590/2317-4889202220210077","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"163 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77479391","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
Ediacaran-Cambrian microbialites of the Southern Amazon Craton: relation with the metazoan rise, sea-level changes, and global tectonics 南亚马逊克拉通埃迪卡拉-寒武纪微生物岩:与后生界上升、海平面变化和全球构造的关系
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210065
A. Nogueira, R. F. Santos, G. R. Romero, José Bandeira, Claudio Riccomini, Ivan Alfredo Romero Barrera, P.A.S. Silva, J. L. Soares, T. Fairchild, A. A. E. Nogueira, A. Góes, Rick Souza de Oliveira, Renato Sol Paiva de Medeiros, L. S. Andrade, A. Brito, Pedro Guilherme Assunção Oliveira, Argel de Assis Nunes Sodré, Davi Ferreira de Carvalho, W. Truckenbrodt
{"title":"Ediacaran-Cambrian microbialites of the Southern Amazon Craton: relation with the metazoan rise, sea-level changes, and global tectonics","authors":"A. Nogueira, R. F. Santos, G. R. Romero, José Bandeira, Claudio Riccomini, Ivan Alfredo Romero Barrera, P.A.S. Silva, J. L. Soares, T. Fairchild, A. A. E. Nogueira, A. Góes, Rick Souza de Oliveira, Renato Sol Paiva de Medeiros, L. S. Andrade, A. Brito, Pedro Guilherme Assunção Oliveira, Argel de Assis Nunes Sodré, Davi Ferreira de Carvalho, W. Truckenbrodt","doi":"10.1590/2317-4889202220210065","DOIUrl":"https://doi.org/10.1590/2317-4889202220210065","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"53 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78834460","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: 4
High-resolution stratigraphy of peritidal microbial carbonates from the Lagoa do Jacaré Formation, Bambuí Group, north of Minas Gerais state, Brazil 巴西米纳斯吉拉斯州北部Bambuí群Lagoa do jacar<s:1>组潮外微生物碳酸盐的高分辨率地层学
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202120210040
S. A. Moura, A. Uhlein, G. Uhlein, M. Dantas
{"title":"High-resolution stratigraphy of peritidal microbial carbonates from the Lagoa do Jacaré Formation, Bambuí Group, north of Minas Gerais state, Brazil","authors":"S. A. Moura, A. Uhlein, G. Uhlein, M. Dantas","doi":"10.1590/2317-4889202120210040","DOIUrl":"https://doi.org/10.1590/2317-4889202120210040","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"66 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83875611","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
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