Clays and Clay Minerals最新文献_第3页

Preparation and Corrosive Anion-curing Capability of Layered Double Hydroxide (LDH)/Montmorillonite Composites 层状双氢氧化物(LDH)/蒙脱土复合材料的制备及其腐蚀阴离子固化性能

4区地球科学

Clays and Clay Minerals Pub Date : 2023-08-01 DOI: 10.1007/s42860-023-00252-6

Limei Wu, Mingxi Sun, Xiaolong Wang, Yushen Lu, Ning Tang, Lili Gao, Qing Wang, Ling Hu

引用次数: 0

The Kaolin and Bentonite Deposit of Tamame De Sayago (Zamora, Spain): Mineralogy, Geochemistry, and Genesis 西班牙萨莫拉Tamame De Sayago高岭土和膨润土矿床:矿物学、地球化学和成因

4区地球科学

Clays and Clay Minerals Pub Date : 2023-08-01 DOI: 10.1007/s42860-023-00256-2

E. M. Manchado, M. Suárez, E. García-Romero

{"title":"The Kaolin and Bentonite Deposit of Tamame De Sayago (Zamora, Spain): Mineralogy, Geochemistry, and Genesis","authors":"E. M. Manchado, M. Suárez, E. García-Romero","doi":"10.1007/s42860-023-00256-2","DOIUrl":"https://doi.org/10.1007/s42860-023-00256-2","url":null,"abstract":"Abstract A geological, mineralogical, and geochemical characterization of the Tamame de Sayago (Zamora, Spain) deposit was carried out with the aim of knowing the conditions that facilitated the genesis in the same deposit of kaolinite and smectites. The alteration processes affecting a Variscan granite were deduced throughout the study of a very wide group of representative samples by X-ray diffraction (XRD), scanning electron microscopy (SEM), chemical analyses of major, minor, and trace elements, as well as δ 18 O, δ 34 S stable isotope and K/Ar dating analyses. In addition, 2D and 2.5D graphs of the kaolinite and smectite isoconcentrations were obtained from core data. According to the color and texture, two different clayey rock types were identified and named as homogeneous alteration zones (ZAHO) and heterogeneous alteration zones (ZAHE). The ZAHO are regoliths in which the granite texture is preserved, and the feldspars are almost completely kaolinized. In the ZAHE, the original texture of the granitic rock is lost, and the main clay mineral is smectite. The mineralogical composition is similar, with kaolinite, smectite, mica, quartz, scarce feldspar, and occasionally natroalunite and APS (aluminum-phosphate-sulphate); however, the mineral concentration varies considerably because ZAHO are rich in kaolin areas whereas ZAHE are bentonitic areas. Both rock types contain numerous veins and nodules. The weathering of the Paleozoic granite alongside the absence of sedimentation during the Mesozoic led to the formation of kaolinite that is preserved in ZAHO materials. Nonetheless, during the Cretaceous–Tertiary transit, the conditions of tectonic stability varied. Late Variscan faults reactivated which allowed the percolation of Mg- and Ca-rich hydrothermal fluids through the already kaolinized granite, increasing the alteration of the primary silicates and leading to the formation of smectites in ZAHE materials. The amount of smectites is greater closer to the faults. The stable isotopes indicate the meteoric nature of the low-temperature hydrothermal fluids. The K/Ar data obtained from the natroalunite of veins indicate that those hydrothermal fluids circulated in different pulses from 66.4 ± 1.7 to 58.8 ± 1.5 Ma, as a minimum. Those ages are coincident with the first formation stages of the Duero Basin.","PeriodicalId":10320,"journal":{"name":"Clays and Clay Minerals","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135005601","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

Rare Earth and Critical Element Chemistry of the Volcanic Ash-fall Parting in the Fire Clay Coal, Eastern Kentucky, USA 美国肯塔基州东部火粘土煤中火山灰的稀土和关键元素化学

IF 2.2 4区地球科学

Clays and Clay Minerals Pub Date : 2023-06-01 DOI: 10.1007/s42860-023-00237-5

Jingjing Liu, S. Dai, Debora Berti, C. Eble, Mengjun Dong, Yan Gao, J. Hower

引用次数: 0

Distribution and Fractionation of Rare Earth Elements (REE) in the Ion Adsorption-type REE Deposit (IAD) at Maofeng Mountain, Guangzhou, China 广州毛峰山离子吸附型稀土矿床(IAD)中稀土元素的分布与分馏

4区地球科学

Clays and Clay Minerals Pub Date : 2023-06-01 DOI: 10.1007/s42860-023-00251-7

Yuanyuan Wang, Liu Liu, Mingqi Sun, Jian Huang, Yufeng Huang, Xiaoliang Liang, Wei Tan, Hongping He, Jianxi Zhu

引用次数: 0

Rare-Earth Minerals in Kaolin Ore, Mine Tailings, and Sands – Central Georgia, Upper Coastal Plain 稀土矿物在高岭土矿石，矿山尾矿，和砂-格鲁吉亚中部，上海岸平原