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We report the mineralogy, petrology, major, minor and trace element geochemistry, O and Si isotopes of a complex compound chondrule from the Allende meteorite. The chondrule contains zones of refract...
Estimation of 26Al (half-life = 705 kyr) content at the time of meteorite fall is required to calculate the terrestrial age of meteorites using the 26Al content. Previous studies (e.g., Cressy, 1971;...
With the development of the economy, the positive influences of traditional beliefs on the biodiversity conservation have been ignoring and the traditional beliefs have been meeting the serious challe...
Thirty seven soil samples collected from arid and semiarid regions of southern Iran were studied to determine the different forms of potassium and their relation with clay mineralogy and other soil pr...
Understanding of the nitrogen (N) cycle and its spatial variability is important for managing ecosystems. Soil δ15N, as an important indicator of different soil nitrogen cycling processes, may provide...
Landslides along the Missouri and Kansas rivers will affect existing structures and potential development in the Kansas City metropolitan area. A pilot landslide-mapping project was conducted in the v...
The relationship between geological structure and helium isotopes is discussed for deep groundwaters from the Osaka sedimentary basin, southwest Japan, to understand dissolved He in groundwater for hy...
会议信息 篇名 Diagenesis of magnetic minerals in intertidal sediments of the Yangtze Estuary, and its relationship with heavy metal pollution 语种 英文 撰写或编译 撰写 作者 Zhang Weiguo,Yu Lizhong 第一作者单位 华东师范大学 会议名称 Fun...
Translucent pink opals from Mexico (states of Mapimi and Michoacan) and Peru (Acari area, near Arequipa) are opal- CT, containing from 10 to 40 % palygorskite, as demonstrated by XRD, infrared absorp...
Abstract: The matrix of the Pliocene volcaniclastics from the Akrotiri area of the Santorini island (Greece) is dominated by clinoptilolite. Smectite, occasionally illite-smectite, opal-CT, cristobali...
Abstract: A theoretical model describing the interaction between crystalline swelling and cation exchange selectivity is proposed for expanding 2:1 phyllosilicates. The model is based on the assumptio...
Abstract: In the Tertiary lacustrine sediments of the Jbel Rhassoul (Morocco), stevensite and sepiolite, confined to the dolomitic facies, are commonly mixed at lower parts of the so-called “Formation...
Laurelite, Pb7F12CI2,from the Grand Reefmine, Graham County, Arizona, is hexagonal, Po,witha = 10.267(1) and c = 3.9844(4) Aand Z= 1.The crystal structure wassolved bydirect methods and refined to R =...
The crystal structure of namuwite, (Zn,Cu)4S04(OHk4H20, trigonal, a = 8.331(6), C = 10.54(1) A,V=634(1) A3,Pj, Z = 2, has been solved by direct methods and refined to an R index of 7.9% using MoKa X-r...
Westudied pyrite spherules built of radiating crystals to establish the relationships among microstructure, composition, and macroscopic appearance. Results of high-reso-lution transmission electron m...

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