2010
DOI: 10.2465/jmps.090311
|View full text |Cite
|
Sign up to set email alerts
|

Experimental constraints on the evolution of iron and phosphorus-rich melts: experiments in the system CaO-MgO-Fe2O3-P2O5-SiO2-H2O-CO2

Abstract: Carbonatites occur on most continents and are often associated with economic ore deposits. In rare cases, carbonatites are associated with particular Fe and P -rich rocks, the latter of which can also be of economic importance and can form ores for copper, zirconium, or platinum group elements. Here I present some novel experimental constraints in Fe and P -rich carbonate and silicate -rich systems as a starting point to better understand the origin of these rock types. Phase relations in the system CaO -MgO -… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...
1
1
1
1

Citation Types

0
3
0

Year Published

2013
2013
2024
2024

Publication Types

Select...
8

Relationship

0
8

Authors

Journals

citations
Cited by 12 publications
(4 citation statements)
references
References 30 publications
0
3
0
Order By: Relevance
“…Phosphorus in silicate melts also forms separate clusters that confine iron within stable complexes Fe 3+ (PO 4 ) [86]. It seems likely that structure of the phoscorite melt was constituted by interconnected subnetworks of SiO 4 -tetrahedra and CO 3 -triangles with local domains of PO 4 -tetrahedra and Fe 3+ (PO 4 )-clusters, without a liquid immiscibility [92]. Interaction of this melt with silicate rock launched forsterite crystallization, sometimes with grains of primary "peridotitic" forsterite as seed crystals (Figure 12a).…”
Section: Discussionmentioning
confidence: 99%
“…Phosphorus in silicate melts also forms separate clusters that confine iron within stable complexes Fe 3+ (PO 4 ) [86]. It seems likely that structure of the phoscorite melt was constituted by interconnected subnetworks of SiO 4 -tetrahedra and CO 3 -triangles with local domains of PO 4 -tetrahedra and Fe 3+ (PO 4 )-clusters, without a liquid immiscibility [92]. Interaction of this melt with silicate rock launched forsterite crystallization, sometimes with grains of primary "peridotitic" forsterite as seed crystals (Figure 12a).…”
Section: Discussionmentioning
confidence: 99%
“…Formation of phoscorites is a contentious subject with the two leading models suggesting either cumulates from fractional crystallization from carbonatite melts or phoscorite-carbonatite liquid immiscibility. Experiments by Klemme (2010) indicate that an Fe-P-rich melt can crystallize a phoscorite mineral assemblage with the residual liquid resembling carbonatite melts, supporting the fractional crystallization model. However, this model does not explain how an Fe-P-rich melt forms in the first place.…”
Section: Phoscoritesmentioning
confidence: 56%
“…Phoscorites crystallized from mantle-derived melts, and processes such as cumulation, fractional crystallization and liquid immiscibility may play important roles during their formation and evolution. The limited experimental data available are insufficient to establish whether phoscorites formed via fractional crystallization or liquid immiscibility (Klemme, 2010), and future studies are clearly needed to fully understand these exotic rock types.…”
Section: Origin Of Kola Phoscorites and Carbonatitesmentioning
confidence: 99%