Pub Date : 2024-07-01DOI: 10.31419/issn.2594-942x.v112024i3a6mpc
M. Castilho, M.L. Costa, Henrique Almeida
Igarapé Diabinho, situated in the central region of the state of Acre, is a tributary on the right bank of the Envira river, belonging to the Juruá river basin. Its U-shaped grooved channel is carved in sediments known as the Solimões Formation, of Late Miocene–Pleistocene age. The rocky exposures along Diabinho stream demonstrate a succession of massive silt-clay sediments, covered by other compact sandy silts cemented by carbonates. These sediments are partly overlain by alluvial (fluvial-lacustrine) sediments from the Quaternary, in the region where this stream dominates. For the study, samples collected in three profiles along a ravine on the right bank of Igarapé Diabinho were investigated, in an area used for picnics during the dry season, that is, with slight human disturbance. To assist in identifying the probable source areas of these sediments, and determine their weathering and transport conditions, granulometric analyzes were carried out, investigating the mineralogical composition of the sediments, their heavy minerals, and the mineralogy of the sediments’ clay fraction. The sediments are predominantly silts with little clay, being composed of quartz, feldspars (albite and microcline), clay minerals (smectite, illite, and kaolinite), muscovite, and chlorite. As a result, the sediments were deposited in mild paleoclimatic conditions under weak chemical weathering, indicated by the predominance of unstable minerals, such as amphiboles, feldspars, biotite, epidote, garnet, apatite, and titanite. The dominant presence of aluminosilicates (kyanite, andalusite, sillimanite, garnet, and micas) and epidote indicates that these sediments had as their primary source metamorphosed pelitic rocks. A second assemblage composed of tourmaline, zircon, apatite, titanite, and even ilmenite points to possible contributions from basic and intermediate igneous rocks that are currently observed in Serra do Divisor on the borders of Brazil and Peru. In conclusion, these findings contribute to implications in the paleoenvironmental context by providing insights into the probable source areas of the sediments, determining the weathering and transport conditions, and identifying the mineralogy of the sediments.
Igarapé Diabinho 位于阿克里州中部地区，是恩维拉河右岸的一条支流，属于朱鲁阿河流域。河道呈 U 形，刻在中新世晚期至早更新世时期的索里芒斯层沉积物中。Diabinho 溪沿岸的岩石出露处显示了大量淤泥-粘土沉积物的演替，这些沉积物被碳酸盐胶结的其他致密砂质淤泥所覆盖。这些沉积物部分被第四纪冲积（河流-湖泊）沉积物所覆盖，该地区是该溪流的主要分布区。为了进行这项研究，我们在伊加拉佩-迪亚比尼奥河右岸的一个峡谷中采集了三个剖面的样本，这些样本是在一个旱季野餐的地方采集的，因此受到了轻微的人为干扰。为了帮助确定这些沉积物的可能来源地区，并确定其风化和迁移条件，我们进行了颗粒计量分析，研究沉积物的矿物成分、重矿物以及沉积物粘土部分的矿物学。沉积物主要是淤泥，粘土很少，由石英、长石（白云石和微绿泥石）、粘土矿物（直闪石、伊利石和高岭石）、褐铁矿和绿泥石组成。因此，沉积物是在温和的古气候条件下沉积的，化学风化作用较弱，这主要表现在不稳定矿物上，如闪石、长石、斜长石、绿泥石、石榴石、磷灰石和榍石。铝硅酸盐（黝帘石、阳起石、矽线石、石榴石和云母）和闪石的主要存在表明，这些沉积物的主要来源是变质的辉绿岩。由电气石、锆石、磷灰石、榍石，甚至钛铁矿组成的第二个集合体表明，这些沉积物可能来自基本火成岩和中间火成岩，目前在巴西和秘鲁交界处的 Serra do Divisor 发现了这些火成岩。总之，这些发现有助于了解沉积物的可能来源地区、确定风化和迁移条件以及确定沉积物的矿物学，从而对古环境产生影响。
{"title":"CARACTERIZAÇÃO MINERALÓGICA DOS SEDIMENTOS DO IGARAPÉ DIABINHO (FORMAÇÃO SOLIMÕES) NO ESTADO DO ACRE – PROVENIÊNICA E IMPLICAÇÕS AMBIENTAIS","authors":"M. Castilho, M.L. Costa, Henrique Almeida","doi":"10.31419/issn.2594-942x.v112024i3a6mpc","DOIUrl":"https://doi.org/10.31419/issn.2594-942x.v112024i3a6mpc","url":null,"abstract":"Igarapé Diabinho, situated in the central region of the state of Acre, is a tributary on the right bank of the Envira river, belonging to the Juruá river basin. Its U-shaped grooved channel is carved in sediments known as the Solimões Formation, of Late Miocene–Pleistocene age. The rocky exposures along Diabinho stream demonstrate a succession of massive silt-clay sediments, covered by other compact sandy silts cemented by carbonates. These sediments are partly overlain by alluvial (fluvial-lacustrine) sediments from the Quaternary, in the region where this stream dominates. For the study, samples collected in three profiles along a ravine on the right bank of Igarapé Diabinho were investigated, in an area used for picnics during the dry season, that is, with slight human disturbance. To assist in identifying the probable source areas of these sediments, and determine their weathering and transport conditions, granulometric analyzes were carried out, investigating the mineralogical composition of the sediments, their heavy minerals, and the mineralogy of the sediments’ clay fraction. The sediments are predominantly silts with little clay, being composed of quartz, feldspars (albite and microcline), clay minerals (smectite, illite, and kaolinite), muscovite, and chlorite. As a result, the sediments were deposited in mild paleoclimatic conditions under weak chemical weathering, indicated by the predominance of unstable minerals, such as amphiboles, feldspars, biotite, epidote, garnet, apatite, and titanite. The dominant presence of aluminosilicates (kyanite, andalusite, sillimanite, garnet, and micas) and epidote indicates that these sediments had as their primary source metamorphosed pelitic rocks. A second assemblage composed of tourmaline, zircon, apatite, titanite, and even ilmenite points to possible contributions from basic and intermediate igneous rocks that are currently observed in Serra do Divisor on the borders of Brazil and Peru. In conclusion, these findings contribute to implications in the paleoenvironmental context by providing insights into the probable source areas of the sediments, determining the weathering and transport conditions, and identifying the mineralogy of the sediments.","PeriodicalId":505201,"journal":{"name":"Boletim do Museu de Geociências da Amazônia","volume":"92 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141838487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-27DOI: 10.31419/issn.2594-942x.v112024i2a4mens
Maria Ecilene Silva
Among the several roles played by gold since the most ancient civilizations until today, the most incoherent is for sealing the matrimony. Whoever had this shiny idea certainly considered only the beauty and value of this mineral. If they had measured the other gold properties, would have chosen another mineral to symbolize the instability, complexity and deepness of marriage. If the objective was to elevate marriage to gold standard, it would be necessary to reproduce other gold properties such as high resistance, chemical inertness and durability and, in addition, the malleability and ductility of gold, which are so necessary for the relationship to be lasting. The marriage is a kind of alchemy becoming increasingly rare nowadays and the relationships are in a general way only lead and other common metals.
{"title":"O OURO E OS TOLOS","authors":"Maria Ecilene Silva","doi":"10.31419/issn.2594-942x.v112024i2a4mens","DOIUrl":"https://doi.org/10.31419/issn.2594-942x.v112024i2a4mens","url":null,"abstract":"Among the several roles played by gold since the most ancient civilizations until today, the most incoherent is for sealing the matrimony. Whoever had this shiny idea certainly considered only the beauty and value of this mineral. If they had measured the other gold properties, would have chosen another mineral to symbolize the instability, complexity and deepness of marriage. If the objective was to elevate marriage to gold standard, it would be necessary to reproduce other gold properties such as high resistance, chemical inertness and durability and, in addition, the malleability and ductility of gold, which are so necessary for the relationship to be lasting. The marriage is a kind of alchemy becoming increasingly rare nowadays and the relationships are in a general way only lead and other common metals.","PeriodicalId":505201,"journal":{"name":"Boletim do Museu de Geociências da Amazônia","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141098377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-27DOI: 10.31419/issn.2594-942x.v112024i2a1lres
Laeny Santo, José Pina Assis, Sandra L Bastos
The teaching of Paleontology is of great importance in the training of students, supporting the understanding of various science contents. For this reason, its implementation from Elementary School is essential as it provokes curiosity in students. Despite this, themes in this field of knowledge are treated in a fragmented manner in school spaces, so many difficulties are encountered, whether in the structure, the lack of teaching resources, the limitations of support instruments, such as textbooks, or even due to negligence of the official documents that guide fundamental education in Brazil, which often do not deal with the subject with due importance. Given this context, we set out as a general objective to present methodological proposals for the teaching of Paleontology based on the elaboration of a catalogue that brings together scripts of practical activities, which require little infrastructure, and uses simple, low-cost materials that can contribute to the teaching-learning process of Paleontology in Elementary School. The preparation of the catalogue followed three stages: 1) Collection of reference data (bibliographic and teaching materials); 2) Selection and ordering of the thematic activities found, always focusing on the low cost of the materials used and the ease of carrying them out in the school environment); 3) Structural reorganization of the selected activities, considering our pedagogical understanding, to compose the catalogue. Thus, and in line with the National Common Curricular Base (BNCC), the activities were organized into three groups: a) research/production of materials; b) didactic game; c) information and communication technologies. The Practical Activities Guide Catalog aims to bring students and teachers at Elementary School Science and Paleontology together, serving as an instrument to assist in the teaching-learning process.
{"title":"METODOLOGIAS ATIVAS PARA O ENSINO DE PALEONTOLOGIA NA EDUCAÇÃO BÁSICA","authors":"Laeny Santo, José Pina Assis, Sandra L Bastos","doi":"10.31419/issn.2594-942x.v112024i2a1lres","DOIUrl":"https://doi.org/10.31419/issn.2594-942x.v112024i2a1lres","url":null,"abstract":"The teaching of Paleontology is of great importance in the training of students, supporting the understanding of various science contents. For this reason, its implementation from Elementary School is essential as it provokes curiosity in students. Despite this, themes in this field of knowledge are treated in a fragmented manner in school spaces, so many difficulties are encountered, whether in the structure, the lack of teaching resources, the limitations of support instruments, such as textbooks, or even due to negligence of the official documents that guide fundamental education in Brazil, which often do not deal with the subject with due importance. Given this context, we set out as a general objective to present methodological proposals for the teaching of Paleontology based on the elaboration of a catalogue that brings together scripts of practical activities, which require little infrastructure, and uses simple, low-cost materials that can contribute to the teaching-learning process of Paleontology in Elementary School. The preparation of the catalogue followed three stages: 1) Collection of reference data (bibliographic and teaching materials); 2) Selection and ordering of the thematic activities found, always focusing on the low cost of the materials used and the ease of carrying them out in the school environment); 3) Structural reorganization of the selected activities, considering our pedagogical understanding, to compose the catalogue. Thus, and in line with the National Common Curricular Base (BNCC), the activities were organized into three groups: a) research/production of materials; b) didactic game; c) information and communication technologies. The Practical Activities Guide Catalog aims to bring students and teachers at Elementary School Science and Paleontology together, serving as an instrument to assist in the teaching-learning process.","PeriodicalId":505201,"journal":{"name":"Boletim do Museu de Geociências da Amazônia","volume":"32 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141098063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-27DOI: 10.31419/issn.2594-942x.v112024i2a2mesx
Milson Xavier
There were years of interruption of oil extraction activity by the state-owned Petrobrás in the Fazenda Belém onshore oil field. After the purchase by the company 3R Petroleum, the equipment started moving again and aroused euphoria among passers-by on the BR-304. In this work, some setbacks will be presented throughout the history of oil activity in Brazil and what led to the sale of Polo Fazenda Belém to the private sector.
{"title":"A BACIA POTIGUAR NA HISTÓRIA DA EXPLORAÇÃO DE PETRÓLEO BRASILEIRO E A VENDA, PELA PETROBRÁS, DO POLO FAZENDA BELÉM, ARACATI-CE, PARA A EMPRESA 3R PETROLEUM","authors":"Milson Xavier","doi":"10.31419/issn.2594-942x.v112024i2a2mesx","DOIUrl":"https://doi.org/10.31419/issn.2594-942x.v112024i2a2mesx","url":null,"abstract":"There were years of interruption of oil extraction activity by the state-owned Petrobrás in the Fazenda Belém onshore oil field. After the purchase by the company 3R Petroleum, the equipment started moving again and aroused euphoria among passers-by on the BR-304. In this work, some setbacks will be presented throughout the history of oil activity in Brazil and what led to the sale of Polo Fazenda Belém to the private sector.","PeriodicalId":505201,"journal":{"name":"Boletim do Museu de Geociências da Amazônia","volume":"45 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141098361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-27DOI: 10.31419/issn.2594-942x.v112024i2a6mens
Maria Ecilene Silva
No caminho entre a nossa casa e o riacho por onde precisávamos passar diariamente em busca de água para as necessidades domésticas, havia um pequeno cemitério. Eu me escondia lá às vezes quando os meninos da vizinhança corriam atrás de mim para me bater ou coisa pior. Enquanto esperava meus algozes se cansarem e desistirem da caça, aproveitava para comer os frutos das mangueiras que sombreavam os túmulos. As árvores frondosas ostentavam galhos tão carregados que pendiam ao chão com o peso das mangas graúdas. Eram de fato muito maiores que aquelas geralmente encontradas pelas redondezas. O cheiro denso e pretensioso, um convite irrecusável ao desfrute e a doçura e suculência, uma afronta aos residentes do local.
{"title":"UMA DAS FRUTAS DE CEMITÉRIOS, A MANGA","authors":"Maria Ecilene Silva","doi":"10.31419/issn.2594-942x.v112024i2a6mens","DOIUrl":"https://doi.org/10.31419/issn.2594-942x.v112024i2a6mens","url":null,"abstract":"No caminho entre a nossa casa e o riacho por onde precisávamos passar diariamente em busca de água para as necessidades domésticas, havia um pequeno cemitério. Eu me escondia lá às vezes quando os meninos da vizinhança corriam atrás de mim para me bater ou coisa pior. Enquanto esperava meus algozes se cansarem e desistirem da caça, aproveitava para comer os frutos das mangueiras que sombreavam os túmulos. As árvores frondosas ostentavam galhos tão carregados que pendiam ao chão com o peso das mangas graúdas. Eram de fato muito maiores que aquelas geralmente encontradas pelas redondezas. O cheiro denso e pretensioso, um convite irrecusável ao desfrute e a doçura e suculência, uma afronta aos residentes do local.","PeriodicalId":505201,"journal":{"name":"Boletim do Museu de Geociências da Amazônia","volume":"51 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141098236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-27DOI: 10.31419/issn.2594-942x.v112024i2a3hh
Helmut Höhn
Em abril de 2024 ao dar continuidade a organização de minha papelada e documentação física colecionada ao longo de minha vivência como aprendiz da vida, estudante de geologia e das geociências e como professor da Universidade Federal do Pará, me deparei com o documento intitulado BACIA HIDROGRÁFICA DO RIO ITACAIUNAS-PA: UMA AVALIAÇÃO ATRAVÉS DA GEOQUÍMICA DE ÁGUAS E SEDIMENTOS elaborado pelo geólogo Helmut Höhn, com 22 páginas, ilustrado, datado de outubro de 2007. Foi então que me lembrei que ele, meu ex-mestrando e amante da vida, e dos minerais, em especial do diamante, viera a minha pessoa, e o apresentara como um projeto sonhado por ele, e que queria torná-lo realidade. Ao lê-lo, concluí ser da maior importância, mas muito grandioso, cuja execução dependeria de uma grande equipe multidisciplinar e a envolver várias instituições e empresas, além, é claro, dos altos custos.
2024 年 4 月，在继续整理我作为一名生活学习者、地质学和地球科学学生以及帕拉州联邦大学教授的经历中收集的文件和实物资料时，我看到了题为 BACIA HIDROGRÁFICA DO RIO ITACAIUNAS-PA：该文件由地质学家赫尔穆特-霍恩（Helmut Höhn）编写，共 22 页，图文并茂，日期为 2007 年 10 月。这时我才想起，他是我以前的硕士生，也是一位热爱生命和矿物（尤其是钻石）的人，他曾来找过我，并向我介绍了这本书，说这是他梦寐以求并希望实现的一个项目。当我读到它时，我得出的结论是，它极其重要，但非常宏大，其实施将取决于一个庞大的多学科团队，涉及多个机构和公司，当然还有高昂的成本。
{"title":"BACIA HIDROGRÁFICA DO RIO ITACAIUNAS-PA: UMA AVALIAÇÃO ATRAVÉS DA GEOQUÍMICA DE ÁGUAS E SEDIMENTOS","authors":"Helmut Höhn","doi":"10.31419/issn.2594-942x.v112024i2a3hh","DOIUrl":"https://doi.org/10.31419/issn.2594-942x.v112024i2a3hh","url":null,"abstract":"Em abril de 2024 ao dar continuidade a organização de minha papelada e documentação física colecionada ao longo de minha vivência como aprendiz da vida, estudante de geologia e das geociências e como professor da Universidade Federal do Pará, me deparei com o documento intitulado BACIA HIDROGRÁFICA DO RIO ITACAIUNAS-PA: UMA AVALIAÇÃO ATRAVÉS DA GEOQUÍMICA DE ÁGUAS E SEDIMENTOS elaborado pelo geólogo Helmut Höhn, com 22 páginas, ilustrado, datado de outubro de 2007. Foi então que me lembrei que ele, meu ex-mestrando e amante da vida, e dos minerais, em especial do diamante, viera a minha pessoa, e o apresentara como um projeto sonhado por ele, e que queria torná-lo realidade. Ao lê-lo, concluí ser da maior importância, mas muito grandioso, cuja execução dependeria de uma grande equipe multidisciplinar e a envolver várias instituições e empresas, além, é claro, dos altos custos.","PeriodicalId":505201,"journal":{"name":"Boletim do Museu de Geociências da Amazônia","volume":"50 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141098105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-27DOI: 10.31419/issn.2594-942x.v112024i2a5mens
Maria Ecilene Silva
Visitei na semana passada uma pequena exposição no hall principal do shopping center da minha cidade. Entre estandes de roupas da chamada moda indiana, laticínios, doces, tapetes e de outras quinquilharias, um deles me atraiu feito o imã da magnetita, não obstante, as minhas baixas reservas de ferritina. Havia amostras de quartzo rosa, verde e hialino, ametistas, piritas, turmalinas negras, entre outros. Um espetáculo de cores e brilhos diversos.
{"title":"O PODER DA CALCITA, UM MINERAL DE CHACRAS E TINTAS","authors":"Maria Ecilene Silva","doi":"10.31419/issn.2594-942x.v112024i2a5mens","DOIUrl":"https://doi.org/10.31419/issn.2594-942x.v112024i2a5mens","url":null,"abstract":"Visitei na semana passada uma pequena exposição no hall principal do shopping center da minha cidade. Entre estandes de roupas da chamada moda indiana, laticínios, doces, tapetes e de outras quinquilharias, um deles me atraiu feito o imã da magnetita, não obstante, as minhas baixas reservas de ferritina. Havia amostras de quartzo rosa, verde e hialino, ametistas, piritas, turmalinas negras, entre outros. Um espetáculo de cores e brilhos diversos.","PeriodicalId":505201,"journal":{"name":"Boletim do Museu de Geociências da Amazônia","volume":"45 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141098359","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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