Apatite as a probe of halogen and water fugacities in the terrestrial planets

Non-basaltic asteroidal magmatism during the earliest stages of solar system evolution: A view from Antarctic achondrites Graves Nunatak 06128 and 06129

“…However, migration capability may have been enhanced through the availability of other volatiles such as water. Boudreau et al (1997) andPatiñ o Douce andRoden (2006) suggested that high Cl/F in apatite reflects the enrichment of other volatile elements such as water. The Q-Xenon is typical of primitive chondritic meteorites and its presence here demonstrates retention of a significant signature of extreme volatiles from a presumed primitive parent.…”

Validity of the Apatite/Merrillite Relationship in Evaluating the Water Content in the Martian Mantle: Implications from Shergottite Northwest Africa (NWA) 2975

“…Phosphates that occur in extra-terrestrial mafic rocks may provide information regarding water (volatiles) content in the environment leading to their formation and transformation (e.g., [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]). The magma source for Martian basalts is the Martian mantle; thus, the basaltic phosphates provide information on the Martian mantle composition as well as its evolution in the course of melting progression [11,[18][19][20][21].…”

Apatite as an indicator of fluid salinity: An experimental study of chlorine and fluorine partitioning in subducted sediments

“…Apatite is a ubiquitous accessory mineral in virtually all geochemical systems (Piccoli and Candela, 2002;Spear and Pyle, 2002;Patiñ o Douce and Roden, 2006), and is stable over a wide range of PT conditions (up to 7.5 GPa in subduction zones, Konzett and Frost, 2009). Prior experimental studies on halogen partitioning between apatite, silicate melts, and aqueous fluids (Korzhinskiy, 1981;Dong, 2005;Mathez and Webster, 2005;Webster et al, 2009;Doherty et al, 2014;McCubbin et al, in press), and further studies based on thermodynamic principals (Candela, 1986;Tacker and Stormer, 1989;Zhu and Sverjensky, 1991;Candela, 1994, 2002), have all focused on calibrating apatite as a monitor of halogen activities in the low pressure hydrothermal and magmatic environment.…”

“…Prior experimental studies on halogen partitioning between apatite, silicate melts, and aqueous fluids (Korzhinskiy, 1981;Dong, 2005;Mathez and Webster, 2005;Webster et al, 2009;Doherty et al, 2014;McCubbin et al, in press), and further studies based on thermodynamic principals (Candela, 1986;Tacker and Stormer, 1989;Zhu and Sverjensky, 1991;Candela, 1994, 2002), have all focused on calibrating apatite as a monitor of halogen activities in the low pressure hydrothermal and magmatic environment. There have also been several experimental (Brenan, 1993;Edgar and Pizzolato, 1995) and theoretical (Patiñ o Douce and Roden, 2006;Patiñ o Douce et al, 2011) studies using apatite as an indicator of halogen fugacity in metasomatic fluids and parental magmas produced within the upper mantle.…”