Trace element partitioning between apatite and silicate melts

Trace element compositions of apatite from the middle zone of the Panzhihua layered intrusion, SW China: Insights into the differentiation of a P- and Si-rich melt

“…5a and b). Sr is compatible in both apatite and plagioclase (D Sr apatite = 1.1-5.1, Prowatke and Klemme, 2006; D Sr plagioclase = 1.5-3.8, Bindeman et al, 1998) and incompatible in clinopyroxene, olivine and Fe-Ti oxides (Hart and Dunn, 1993;Nielsen et al, 1992). Therefore, variation of Sr of residual magmas should be mainly controlled by crystallization of apatite and plagioclase.…”

“…It is therefore enigmatic why the apatite-rich MZb accounts for such a large proportion of the Panzhihua intrusion. Apatite can incorporate significant amounts of rare earth elements (REE), Sr, U, Th, F and Cl from magmas (Prowatke and Klemme, 2006;Watson and Green, 1981). It has been widely used to trace the evolution paths of magmas and trapped liquids within interstitial phases (Cawthorn, 1994(Cawthorn, , 2013Meurer and Meurer, 2006;Tollari et al, 2008;VanTongeren and Mathez, 2012).…”

Evidence for distinct stages of magma history recorded by the compositions of accessory apatite and zircon

“…However, in 381 the Criffell pluton the overwhelming majority of apatite inclusions are found in isolation 382 from other accessory minerals, consistent with crystallisation from the bulk magma. 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 Other studies have shown that REE diversity in apatites may also result from an increase in 404 partition coefficients between apatite and silicate melts with increasing differentiation, SiO 2 405 and polymerisation (Prowatke and Klemme, 2006). In this model, increased differentiation in 406 the absence of other accessory minerals should lead to an increase in the REE content of 407 apatite.…”

Saturation des minéraux phosphatés dans les magmas silicatés :

“…The mass balance calculation indicates that most of the REE, U, Th, Cl, Ca and Sr, are present in apatite (~ 75-100 %) and, thus, apatite controls the behaviour of these elements (Table 4. (2001), and Prowatke and Klemme (2006). These profiles correspond to LREE-enriched melts (Lan 80-150 times the primitive mantle content and LUN 8-17 times the primitive mantle content).…”

“…The negative Sr, U and Th anomalies reflect the lower compatibility of these elements into apatite compared to REE (e.g. ÜLa = 5-12 and D Sr = 1.1-1.3) Prowatke and Klemme 2006;. Primitive mantle values are from McDonough and Sun (1995).…”