Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.jsames.2017.04.001 |
Mineralogy and geochemistry of the Lower Cretaceous siliciclastic rocks of the Morita Formation, Sierra San Jose section, Sonora, Mexico | |
Madhavaraju, J.1; Pacheco-Olivas, S. A.2; Gonzalez-Leon, Carlos M.1; Espinoza-Maldonado, Inocente G.2; Sanchez-Medrano, P. A.2; Villanueva-Amadoz, U.1; Monreal, Rogelio2; Pi-Puig, T.3; Ramirez-Montoya, Erik2; Grijalva-Noriega, Francisco J.2 | |
通讯作者 | Madhavaraju, J. |
来源期刊 | JOURNAL OF SOUTH AMERICAN EARTH SCIENCES |
ISSN | 0895-9811 |
出版年 | 2017 |
卷号 | 76页码:397-411 |
英文摘要 | Clay mineralogy and geochemical studies were carried out on sandstone and shale samples collected from the Sierra San Jose section of the Morita Formation to infer the paleoclimate and paleoweathering conditions that prevailed in the source region during the deposition of these sediments. The clay mineral assemblages (fraction < 2 mu m) of the Sierra San Jose section are composed of chlorite and illite. The abundance of illite and chlorite in the studied samples suggest that the physical weathering conditions were dominant over chemical weathering. Additionally, the illite and chlorite assemblages reflect arid or semi-arid climatic conditions in the source regions. K2O/Al2O3 ratio of shales vary between 0.15 and 0.26, which lie in the range of values for clay minerals, particularly illite composition. Likewise, sandstones vary between 0.06 and 0.13, suggesting that the clay minerals are mostly kaolinte and illite types. On the chondrite-normalized diagrams, sandstone and shale samples show enriched light rare earth elements (LREE), flat heavy rare earth elements (HREE) patterns and negative Eu anomalies. The CIA and PIA values and A-CN-K plot of shales indicate low to moderate degree of weathering in the source regions. However, the sandstones have moderate to high values of CIA and PIA suggesting a moderate to intense weathering in the source regions. The SiO2/Al2O3 ratios, bivariate and ternary plots, discriminant function diagram and elemental ratios indicate the felsic source rocks for sandstone and shale of the Morita Formation. (C) 2017 Elsevier Ltd. All rights reserved. |
英文关键词 | Paleoclimate Paleoweathering Morita Formation Sonora Mexico |
类型 | Article |
语种 | 英语 |
国家 | Mexico |
收录类别 | SCI-E |
WOS记录号 | WOS:000402342800029 |
WOS关键词 | UPPER CONTINENTAL-CRUST ; PENNSYLVANIAN-PERMIAN AGE ; BASIN SOUTHEASTERN INDIA ; BAHIA KINO BEACHES ; SEDIMENTARY-ROCKS ; CLAY MINERALOGY ; NORTHERN SONORA ; MAJOR-ELEMENT ; BISBEE GROUP ; PALEOCLIMATIC INTERPRETATION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
来源机构 | Universidad Nacional Autónoma de México |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/200810 |
作者单位 | 1.Univ Nacl Autonoma Mexico, Inst Geol, Estn Reg Noroeste, Hermosillo, Sonora 83000, Mexico; 2.Univ Sonora, Dept Geol, Hermosillo, Sonora 83000, Mexico; 3.Univ Nacl Autonoma Mexico, Inst Geol, Mexico City 04510, DF, Mexico |
推荐引用方式 GB/T 7714 | Madhavaraju, J.,Pacheco-Olivas, S. A.,Gonzalez-Leon, Carlos M.,et al. Mineralogy and geochemistry of the Lower Cretaceous siliciclastic rocks of the Morita Formation, Sierra San Jose section, Sonora, Mexico[J]. Universidad Nacional Autónoma de México,2017,76:397-411. |
APA | Madhavaraju, J..,Pacheco-Olivas, S. A..,Gonzalez-Leon, Carlos M..,Espinoza-Maldonado, Inocente G..,Sanchez-Medrano, P. A..,...&Grijalva-Noriega, Francisco J..(2017).Mineralogy and geochemistry of the Lower Cretaceous siliciclastic rocks of the Morita Formation, Sierra San Jose section, Sonora, Mexico.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,76,397-411. |
MLA | Madhavaraju, J.,et al."Mineralogy and geochemistry of the Lower Cretaceous siliciclastic rocks of the Morita Formation, Sierra San Jose section, Sonora, Mexico".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 76(2017):397-411. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。