User:Christinaxlu/sandbox

Article Evaluation
Evaluating Content

This article is relatively brief, consisting of a topic sentence followed by 3 paragraphs. The topic sentence does a good job at explaining the concept of compatibility as it relates to geochemistry, however, I noticed one of the Wiki links to the term "major element" no longer works. There were no citations embedded in the article, and the author only cited one online textbook that was published in 2005. The author did thoroughly include Wiki links for some terms and elements that a reader might be unfamiliar with. However, the overall content in this article seems to just skim the surface of what compatibility is. It would be helpful to add photos or figures to illustrate, for example, how compatibility of an element differs from incompatibility. In the last paragraph of the article, some of the sentence structures could be improved to be more concise.

Evaluating Tone

Overall, the article is objective and does not have any apparent bias about the topic. Especially considering how brief the article is, the information presented is direct and leaves no room for personal opinions.

Evaluating Sources

The only source listed in this article is to a textbook titled "Geochemistry." The link pulls up a webpage for the International Mine Water Association, an organization focused on various topics related to mine water that was founded in 1979 in Spain. However, the last time the webpage cited in the source was updated was 2013. In addition, I am not able to access the textbook because it has since been published and must be purchased on Amazon.

Evaluating talk page

The only comment on the talk page was from 2006. The user is asking for more clarification between nickel and iron, specifically differences between valence and ionic radius. This article is part of WikiProject Geology and has been rated as Stub-Class, indicating that it only gives a basic description of the topic.

Find Your Sources
Gaetani, G. A. (2004). "The influence of melt structure on trace element partitioning near the peridotite solidus". Contributions to Mineralogy and Petrology, 147 (5), 511–527. http://doi.org/10.1007/s00410-004-0575-1

Gao, S., Luo, T.-C., Zhang, B.-R., Zhang, H.-F., Han, Y.-W., Zhao, Z.-D., & Hu, Y.-K. (1998). "Chemical composition of the continental crust as revealed by studies in East China". Geochimica Et Cosmochimica Acta, 62 (11), 1959–1975. http://doi.org/10.1016/s0016-7037(98)00121-5

Hofmann, A. W. (1997). "Mantle geochemistry: the message from oceanic volcanism". Nature, 385 (6613), 219–229. http://doi.org/10.1038/385219a0

Jung, C. (2006). "Petrogenesis of Tertiary Mafic Alkaline Magmas in the Hocheifel, Germany". Journal of Petrology, 47 (8), 1637–1671. http://doi.org/10.1093/petrology/egl023

Kodolányi, J., Pettke, T., Spandler, C., Kamber, B. S., & Gméling, K. (2011). "Geochemistry of Ocean Floor and Fore-arc Serpentinites: Constraints on the Ultramafic Input to Subduction Zones". Journal of Petrology, 53 (2), 235–270. http://doi.org/10.1093/petrology/egr058

McSween, H. Y., Richardson, S. M., & Uhle, M. E. (2004). Geochemistry: Pathways and Processes (2nd ed.). New York, NY: Columbia University Press. ISBN 978-0231124409.

Navon, O., & Stolper, E. (1987). "Geochemical Consequences of Melt Percolation: The Upper Mantle as a Chromatographic Column". The Journal of Geology, 95 (3), 285–307. http://doi.org/10.1086/629131

Ohara, M. J. (1977). "Geochemical evolution during fractional crystallisation of a periodically refilled magma chamber". Nature, 266 (5602), 503–507. http://doi.org/10.1038/266503a0

Shaw, J. E., Baker, J. A., Kent, A. J. R., Ibrahim, K. M., & Menzies, M. A. (2007). "The Geochemistry of the Arabian Lithospheric Mantle--a Source for Intraplate Volcanism?" Journal of Petrology, 48 (8), 1495–1512. http://doi.org/10.1093/petrology/egm027

Watson, E., Chemiak, D., Hanchar, J., Harrison, T., & Wark, D. (1997). "The incorporation of Pb into zircon". Chemical Geology, 141 (1-2), 19–31. http:/ have a value of $$D>>1$$.

Draft Your Contributions
Lead Section

Compatibility is a term used by geochemists to describe how elements partition themselves in the solid and melt within Earth's mantle.

Understanding the Earth's Interior
Compatibility is commonly described by an element's distribution coefficient. A distribution coefficient describes how the solid and liquid phases of an element will distribute themselves in a mineral. Current studies of Earth's rare trace elements seek to quantify and examine the chemical composition of elements in the Earth's crust. There are still uncertainties in the understanding of the lower crust and upper mantle region of Earth's interior. By having a way to measure the composition of elements in the crust and mantle given a mineral sample, compatibility allows relative concentrations of a particular trace element to be determined. From a petrological point of view, the understanding of how major and rare trace elements differentiate in the melt provides deeper understanding of Earth's chemical evolution over the geologic time scale.

Applications
One of the main sources of information about the Earth's composition comes from understanding the relationship between peridotite and basalt melting. Peridotite makes up most of Earth's mantle. Basalt, which is highly concentrated in the Earth's oceanic crust, is formed when magma reaches the Earth's surface and cools down at a very fast rate. When magma cools, different minerals crystallize at different times depending on the cooling temperature of that respective mineral. This ultimately changes the chemical composition of the melt as different minerals begin to crystallize. This concept can be applied by scientists to give insight on the evolution of Earth's mantle and how concentrations of lithophile trace elements have varied over the last 3.5 billion years.