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Brazilian Journal of Geology最新文献

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Injection of enriched lithospheric mantle magmas explains the formation of microgranular enclaves in the Rio Jacaré Batholith, Borborema Province, Brazil 富含岩石圈地幔岩浆的注入解释了巴西Borborema省Rio jacar<s:1>岩基中微颗粒包裹体的形成
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220220033
Carlos Santana Sousa, Hiakan Santos Soares, M. L. S. Rosa, H. Conceição
{"title":"Injection of enriched lithospheric mantle magmas explains the formation of microgranular enclaves in the Rio Jacaré Batholith, Borborema Province, Brazil","authors":"Carlos Santana Sousa, Hiakan Santos Soares, M. L. S. Rosa, H. Conceição","doi":"10.1590/2317-4889202220220033","DOIUrl":"https://doi.org/10.1590/2317-4889202220220033","url":null,"abstract":"The Rio Jacaré Batholith (RJB; 617 ± 4 Ma) is inserted in the Poço Redondo Domain, Sergipano Orogenic System. This batholith is formed by monzodiorite, quartz monzodiorite, monzonite, and quartz monzonite, with abundant microgranular enclaves (MEs). The MEs vary from black to light gray and exhibit globular to slightly elongated shapes with clear-cut, crenulated, and cuspate, or, more rarely, diffuse contacts. They correspond to diorites, monzodiorites, quartz monzodiorites, and monzonites, and textural features indicate mixing of magmas, such as compositional zoning in plagioclase, inclusion zones in plagioclase phenocrysts, poikilitic alkali feldspar, acicular apatite, and ocellar quartz. Calculations of linear correlations of major elements showed that the smallest fraction of mafic magma involved in the mixing was 0.43. MEs represent the breakdown and cooling of a mafic magma that was injected into a cooler felsic magmatic chamber. Emplacement of this mafic magma occurred at different stages of crystallization of the RJB magmatic chamber. The MEs are magnesian and metaluminous, with affinity to the shoshonitic series. Ratios for Ba/Nb (> 23), Ba/La (> 15), and Nb/La (0.22–0.69) are characteristic of magmas generated from partial melting of an enriched lithospheric mantle source. Batch melting modeling suggests that source melting rates of less than 3% are necessary to generate magmas similar to those of the RJB MEs.","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"13 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81803024","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
Occurrence of dravitic tourmaline in a diamond-bearing breccia: a possible lamproite deposit in the Alto Paranaíba Igneous Province 在上Paranaíba火成岩省含金刚石角砾岩中电石电气石的赋存:一个可能的煌斑岩矿床
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220200063
Ana Carolina Maciel Vieira, P. A. Almeida-Abreu, Gislaine Ámores Batillani, C. Sommer
{"title":"Occurrence of dravitic tourmaline in a diamond-bearing breccia: a possible lamproite deposit in the Alto Paranaíba Igneous Province","authors":"Ana Carolina Maciel Vieira, P. A. Almeida-Abreu, Gislaine Ámores Batillani, C. Sommer","doi":"10.1590/2317-4889202220200063","DOIUrl":"https://doi.org/10.1590/2317-4889202220200063","url":null,"abstract":"","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":"84728625","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
Inhibition of swelling clays and consolidation of Itararé Sandstone using diaminoalkanes (DAA) and ethyl silicate (TEOS) 二氨基烷烃(DAA)和硅酸乙酯(TEOS)对膨胀粘土和砂岩固结的抑制作用
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210061
Danielle Grossi, E. A. Del Lama
{"title":"Inhibition of swelling clays and consolidation of Itararé Sandstone using diaminoalkanes (DAA) and ethyl silicate (TEOS)","authors":"Danielle Grossi, E. A. Del Lama","doi":"10.1590/2317-4889202220210061","DOIUrl":"https://doi.org/10.1590/2317-4889202220210061","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"27 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72726382","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
Hydrothermal bowls in the giant Cretaceous Botucatu paleoerg 巨大的白垩纪波图卡图古生代的热液碗
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210058
L. Hartmann, J. Pertille, M. Bicca, C. B. Santos
{"title":"Hydrothermal bowls in the giant Cretaceous Botucatu paleoerg","authors":"L. Hartmann, J. Pertille, M. Bicca, C. B. Santos","doi":"10.1590/2317-4889202220210058","DOIUrl":"https://doi.org/10.1590/2317-4889202220210058","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":"79549989","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
Rhyacian magmatic arc rocks with sanukitoid geochemical signature from the Juiz de Fora Complex, Minas-Bahia Orogenic System (SE-Brazil) 巴西东南部Minas-Bahia造山系Juiz de Fora杂岩中具有sanukitan地球化学特征的岩浆弧岩
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220220038
Sandro Mauri, M. Heilbron, H. Bruno, R. Marques, Carla Neto, C. Valeriano, Samuel Bersan, Luiz Felipe Romero, M. Geraldes
{"title":"Rhyacian magmatic arc rocks with sanukitoid geochemical signature from the Juiz de Fora Complex, Minas-Bahia Orogenic System (SE-Brazil)","authors":"Sandro Mauri, M. Heilbron, H. Bruno, R. Marques, Carla Neto, C. Valeriano, Samuel Bersan, Luiz Felipe Romero, M. Geraldes","doi":"10.1590/2317-4889202220220038","DOIUrl":"https://doi.org/10.1590/2317-4889202220220038","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"7 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76093300","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
The Cauê Aquifer on the eastern limb of the Moeda Syncline: characterization, impacts, and flow in the western Iron Quadrangle (Quadrilátero Ferrífero), MG, Brazil Moeda向斜东翼Cauê含水层:特征、影响和西部铁四边形(Quadrilátero Ferrífero)，巴西MG
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220220005
Celina Cenni de Castro Magalhães, M. Melo, N. Guiguer, R. S. Paula
{"title":"The Cauê Aquifer on the eastern limb of the Moeda Syncline: characterization, impacts, and flow in the western Iron Quadrangle (Quadrilátero Ferrífero), MG, Brazil","authors":"Celina Cenni de Castro Magalhães, M. Melo, N. Guiguer, R. S. Paula","doi":"10.1590/2317-4889202220220005","DOIUrl":"https://doi.org/10.1590/2317-4889202220220005","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"54 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83309952","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
Carbonate storm deposits and C, O isotopes of the Lagoa do Jacaré Formation (Ediacaran) in the Paraopeba area, Bambuí Group, Brazil 巴西Bambuí群Paraopeba地区Lagoa do jacar<s:1>组(Ediacaran)碳酸盐风暴沉积及C、O同位素
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202120200135
M. Dantas, A. Uhlein, G. Uhlein, Alex Rodrigues de Freitas, Thaís Keuffer Mendonça, José Arthur Oliveira Santos, S. M. Silva
{"title":"Carbonate storm deposits and C, O isotopes of the Lagoa do Jacaré Formation (Ediacaran) in the Paraopeba area, Bambuí Group, Brazil","authors":"M. Dantas, A. Uhlein, G. Uhlein, Alex Rodrigues de Freitas, Thaís Keuffer Mendonça, José Arthur Oliveira Santos, S. M. Silva","doi":"10.1590/2317-4889202120200135","DOIUrl":"https://doi.org/10.1590/2317-4889202120200135","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"55 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":"83846746","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
Differences in the occurrence of debris flows in tropical and temperate environments: field observations and geomorphologic characteristics in Serra do Mar (Brazil) and British Columbia (Canada) 在热带和温带环境中泥石流发生的差异:在Mar山(巴西)和不列颠哥伦比亚省(加拿大)的实地观测和地貌特征
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210064
V. C. Dias, A. Mitchell, B. Vieira, S. McDougall
{"title":"Differences in the occurrence of debris flows in tropical and temperate environments: field observations and geomorphologic characteristics in Serra do Mar (Brazil) and British Columbia (Canada)","authors":"V. C. Dias, A. Mitchell, B. Vieira, S. McDougall","doi":"10.1590/2317-4889202220210064","DOIUrl":"https://doi.org/10.1590/2317-4889202220210064","url":null,"abstract":"Debris flows are among the most destructive types of mass movements throughout the world and are not restricted to certain climate zones or geological environments. In opposite corners of the American continent, Canada and Brazil have experienced several historic debris flows. As part of a one-year international exchange program, the lead author compared morphological evidence related to debris flows and the morphometry of watersheds at sites in Canada and Brazil, with the ultimate goal of improving the understanding of debris flows in Brazil. Field surveys carried out in both areas in 2019 and 2020 permitted observation of the debris-flow signatures, as well as the physical aspects of the surrounding areas and morphometric mapping of watersheds. Both areas exhibit similar typical features of debris flows, and the morphometric results indicate differences that may influence the recurrence of events at the sites in Canada as compared to Brazil due to their higher values for the parameters area > 25° (A25), relief ratio (Rr), and Melton ratio (Mr) at the Canadian sites; however, this dataset is limited. Compared to results in the literature from around the world, values of morphometric parameters at Brazilian sites are within the ranges observed in other tropical climates.","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"34 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91234040","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
Microtextural, spectroscopic, and chemical characterization of amazonite from the Serra Branca Pegmatite, Northeastern Brazil 巴西东北部Serra Branca伟晶岩中亚马逊石的显微结构、光谱和化学特征
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210072
G. Santos, S. B. Barreto, I. M. B. A. Souza, J. F. A. Araújo Neto, L. Sanchéz-Muñoz, Lauro Santos
{"title":"Microtextural, spectroscopic, and chemical characterization of amazonite from the Serra Branca Pegmatite, Northeastern Brazil","authors":"G. Santos, S. B. Barreto, I. M. B. A. Souza, J. F. A. Araújo Neto, L. Sanchéz-Muñoz, Lauro Santos","doi":"10.1590/2317-4889202220210072","DOIUrl":"https://doi.org/10.1590/2317-4889202220210072","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"15 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84978491","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
Geophysical characterization and modeling of a Neoproterozoic intrusive volcaniclastic lamprophyre in southernmost Brazil 巴西最南端新元古代侵入火山碎屑煌斑岩的地球物理表征与模拟
IF 1.4 4区 地球科学
Brazilian Journal of Geology Pub Date : 2022-01-01 DOI: 10.1590/2317-4889202220210051
Anderson Baesso, C. Sommer, J. Savian, J. H. Gambeta, Robson dos Santos Aquino
{"title":"Geophysical characterization and modeling of a Neoproterozoic intrusive volcaniclastic lamprophyre in southernmost Brazil","authors":"Anderson Baesso, C. Sommer, J. Savian, J. H. Gambeta, Robson dos Santos Aquino","doi":"10.1590/2317-4889202220210051","DOIUrl":"https://doi.org/10.1590/2317-4889202220210051","url":null,"abstract":"","PeriodicalId":9221,"journal":{"name":"Brazilian Journal of Geology","volume":"31 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76908598","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
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