User:Catherinepeshek/Choose an Article

Article Selection
Please list articles that you're considering for your Wikipedia assignment below. Begin to critique these articles and find relevant sources.

Option 1

 * Article title: Eclogite
 * Article Evaluation:
 * The article briefly describes formation processes of eclogite from specific localities but does not completely discern the differences between eclogite types and could reference the Coleman et al. (1965) classification scheme.
 * The article uses various ideas to relate eclogite to ancient oceanic crust and mentions the relationship to plate tectonics without citation.
 * The relationship between eclogite and ancient oceanic crust was originally coined by MacGregor and Manton (1986) on their analysis of mantle eclogite xenoliths from the Roberts Victor kimberlite. The supporting evidence for this claim is derived from the high and low oxygen isotope variation of mantle eclogite xenoliths, which can only occur at the surface of the earth due to interaction between seawater and basalt (Muehlenbachs, 1986). Challenges in supporting this hypothesis have been attributed to mantle metasomatism (Gurney and Harte, 1980). This process overwrites the original oxygen isotope signature during exchange with an metasomatizing fluid throughout subduction or mantle residence (O'Reilly and Griffin, 2013). Metasomatism has also been attributed for the variation seen in mantle eclogite xenoliths, rather than sea floor alteration (Huang, 2012).
 * Sources
 * 1) Coleman, R. G., et al. "Eclogites and eclogites: their differences and similarities." Geological Society of America Bulletin 76.5 (1965): 483-508.
 * 2) Gurney, J. J., and B. Harte. "Chemical variations in upper mantle nodules from southern African kimberlites." Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences 297.1431 (1980): 273-293.
 * 3) Huang, J. X. (2012). Multi-stage origin of Roberts Victor eclogites: Progressive metasomatism and its isotopic effects.
 * 4) MacGregor, Ian D., and William I. Manton. "Roberts Victor eclogites: ancient oceanic crust." Journal of Geophysical Research: Solid Earth 91.B14 (1986): 14063-14079.
 * 5) Muehlenbachs, Karlis. "Alteration of the oceanic crust and the 18O history of seawater." Stable isotopes in high temperature geological processes (2018): 425-444.
 * 6) O’Reilly, S. Y., & Griffin, W. L. (2013). Mantle metasomatism. In Lecture Notes in Earth System Sciences (Vol. 0, Issue 9783642283932). https://doi.org/10.1007/978-3-642-28394-9_12
 * 5) Muehlenbachs, Karlis. "Alteration of the oceanic crust and the 18O history of seawater." Stable isotopes in high temperature geological processes (2018): 425-444.
 * 6) O’Reilly, S. Y., & Griffin, W. L. (2013). Mantle metasomatism. In Lecture Notes in Earth System Sciences (Vol. 0, Issue 9783642283932). https://doi.org/10.1007/978-3-642-28394-9_12

Option 2

 * Article title: Metasomatism
 * Article Evaluation:
 * The article contains an extended introduction section with minor detail on many topics, and could be reorganized.
 * The "Types of metasomatite" group can be separated by introducing a "Types of Metasomatism" group where Modal/Patent, Cryptic, as well as Auto and Stealth can be included with correct citations for each. O'Reilly and Griffin (2013) provides an overview of the types and their references.
 * The topic on Mantle Metasomatism can be defined by its own group. This section can be re-written with references. It can include recognition of mantle metasomatism from xenoliths (Gurney and Harte, 1980)
 * Sources
 * 1) Gurney, J. J., and B. Harte. "Chemical variations in upper mantle nodules from southern African kimberlites." Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences 297.1431 (1980): 273-293.
 * 2) Lloyd FE, Bailey DK (1973) Light element metasomatism of the continental mantle: the evidence and the consequences. Phys Chem Earth 9:389–416
 * 3) 6) O’Reilly, S. Y., & Griffin, W. L. (2013). Mantle metasomatism. In Lecture Notes in Earth System Sciences (Vol. 0, Issue 9783642283932). https://doi.org/10.1007/978-3-642-28394-9_12
 * 3) 6) O’Reilly, S. Y., & Griffin, W. L. (2013). Mantle metasomatism. In Lecture Notes in Earth System Sciences (Vol. 0, Issue 9783642283932). https://doi.org/10.1007/978-3-642-28394-9_12

Option 3

 * Article title
 * Ol Doinyo Lengai


 * Article Evaluation
 * The article provides a brief overview on the currently erupting lava type, carbonatite, with no citation. Reference to natrocarbonatite lava is made. No reference to the eruptive cyclicity of nephelinitic/phonolitic and carbonatitve activity is mentioned in any section.
 * An overview on the magmatic evolution can be described, along with current thinking on the processes involved. An overview on crystal phases present in the nephelinite/phonolite magmas can be introduced.
 * Sources
 * 1) Dawson, J.B., Pyle, D.M., Pinkerton, H., 1996. Evolution of natrocarbonatite from a wollastonite nephelinite parent: evidence from the June, 1993 Eruption of Oldoinyo Lengai, Tanzania. Journal of Geology 104, 41–54
 * 2) De Moor, J. M., Fischer, T. P., King, P. L., Botcharnikov, R. E., Hervig, R. L., Hilton, D. R., Barry, P. H., Mangasini, F., & Ramirez, C. (2013). Volatile-rich silicate melts from Oldoinyo Lengai volcano (Tanzania): Implications for carbonatite genesis and eruptive behavior. Earth and Planetary Science Letters, 361, 379–390. https://doi.org/https://doi.org/10.1016/j.epsl.2012.11.006
 * 2) De Moor, J. M., Fischer, T. P., King, P. L., Botcharnikov, R. E., Hervig, R. L., Hilton, D. R., Barry, P. H., Mangasini, F., & Ramirez, C. (2013). Volatile-rich silicate melts from Oldoinyo Lengai volcano (Tanzania): Implications for carbonatite genesis and eruptive behavior. Earth and Planetary Science Letters, 361, 379–390. https://doi.org/https://doi.org/10.1016/j.epsl.2012.11.006

Option 4

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Option 5

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