User:Catherinepeshek/Evaluate an Article

Which article are you evaluating?
Eclogite

Why you have chosen this article to evaluate?
(Briefly explain why you chose it, why it matters, and what your preliminary impression of it was.)

I have chosen this article because I am familiar with the literature on mantle eclogite xenoliths regarding their origin and current thinking. This article describes eclogite as being an important source for some igneous rocks as well as being a playing an important role in plate tectonic processes. My preliminary impression of this article is that some of the ideas expressed could be more organized and require citations. A sub topic in this article could be the current thinking on mantle eclogite xenoliths, their relationship to cratonic crust, and supporting ideas for their protolith, including why it is difficult to interpret their origin. A description on oxygen isotopes could be included.

Evaluate the article
Article Evaluation:

''The article contains relevant information but is confusing in terms of the overall eclogitization process. Reference to the eclogitization page could be included. There is some detail on specific types of eclogite (as defined by accessory mineral assemblages) that relate to formation conditions where the information is spread out between different sections and does not clearly support a single overriding idea that the constituent minerals are indicative of formation processes. Because there are many eclogite facies rocks, there could be a single section describing formation based on rocks from specific localities, which includes using a general geochemical framework for identification and distinction between types.''

''The article uses cited material ranging from 1995-2017 and is mostly up to date but lacks citations in every section. Material that could be added includes: the subduction origin controversy as well as the distribution of mantle eclogite xenoliths, their occurrence, and a relationship to cratonic lithosphere. A more detailed explanation on the carbon isotopic ratio could be included in the ‘eclogite diamonds’ subsection as well as the importance of eclogite as a diamond source rock.''

''The overall article could use more citations to support claims that are being made and could be re-written in a more organized manner. This is especially true in the ‘Importance of eclogite’ section which redundantly states the high-pressure conditions that are previously described in both the ‘Origins’ and ‘Eclogite facies’ sections. Citations for the usefulness of eclogite in understanding plate tectonic processes are needed as well as the partial melting models in the ‘Formation of igneous rocks from eclogite’ subsubsection. This section clearly describes that eclogite can only produce basalt at 100% melt conditions but needs citations. Further discussion on partial melting describes adakite and TTG formation and is cited from a single publication from 2003.''

The idea that eclogite derives from subducted oceanic crust is important and mostly accepted in the geologic community, however this topic is controversial for mantle eclogite xenoliths and both sides of the argument could be presented, including why it is difficult to understand their affinity/protolith.

''The citation links are working and support claims in the article. They include several peer-reviewed publications. There are many pieces of information that are represented as facts but do not include citations.''

''Discussion on the talk page describes the removal of eclogite being an igneous rock due to not being silica undersaturated and having a coarse-grained texture. The page discusses the exception of eclogite xenoliths being brought to the surface during volcanic eruptions. The idea that eclogite may have crystalized in the mantle has been removed on the basis that temperature conditions are too hot. There is question as to whether eclogite should be mentioned as a source of igneous rocks (2006). The work and citations on this topic is not up to date.''

Questions:

Can Oxygen isotope data be included to support the idea that eclogite derives from oceanic crust?

Are there other ideas to support this conclusion?

Should this idea be presented clearly in its own section?