Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (22) Citing Articles via Google Scholar Google Scholar Articles by Klemme, S. Articles by Dalpé, C. Search for Related Content GeoRef GeoRef Citation

Trace-element partitioning between apatite and carbonatite melt

Stephan Klemme and Claude Dalpé

Department of Earth Sciences, University of Bristol, Bristol BS8 1RJ, U.K.

Correspondence: ^* E-mail: sklemme{at}min.uni-heidelberg.de

To establish more fully a basis for quantifying the role of apatite in trace-element fractionation processes, hitherto unknown mineral/melt partition coefficients (D^apatite/melt) for a variety of trace elements (Li, Be, B, K, Cs, Rb, Ba, Th, U, Nb, Ta, La, Ce, Sr, Pr, Hf, Zr, Sm, Gd, Y, Lu, and Pb) have been measured between fluorapatite [Ca₅(PO₄)₃F], chlorapatite [Ca₅(PO₄)₃Cl], and hydroxylapatite [Ca₅(PO₄)₃OH] and carbonatite melt.

Apatites were equilibrated experimentally with carbonatite melts at 1 GPa and 1250 °C, and run products were analyzed for trace elements by secondary ion mass spectrometry (SIMS) and by laser ablation inductively coupled plasma-mass spectrometry (LA-ICP-MS). Calculated partition coefficients indicate incompatibility of most analyzed elements. Rare-earth element (REE) partition coefficients show a convex-upward pattern, indicating that apatite prefers the middle (Sm, Gd) relative to the lighter (La, Ce, Pr) and heavier REE (Lu).

Comparison of partition coefficients determined in this study with previous results in silicate systems reveals a strong influence of melt chemistry on partition coefficients, namely decreasing partition coefficients with decreasing silica-content, and increasing Ca and P in melts.

This article has been cited by other articles:

				J. S. Ray Radiogenic Isotopic Ratio Variations in Carbonatites and Associated Alkaline Silicate Rocks: Role of Crustal Assimilation J. Petrology, October 1, 2009; 50(10): 1955 - 1971. [Abstract] [Full Text] [PDF]

				M. Hoshino, M. Kimata, M. Shimizu, and N. Nishida MINOR-ELEMENT SYSTEMATICS OF FLUORAPATITE AND ZIRCON INCLUSIONS IN ALLANITE-(Ce) OF FELSIC VOLCANIC ROCKS FROM THREE OROGENIC BELTS: IMPLICATIONS FOR THE ORIGIN OF THEIR HOST MAGMAS Can Mineral, December 1, 2007; 45(6): 1337 - 1353. [Abstract] [Full Text] [PDF]

				S. TAPPE, S. F. FOLEY, G. A. JENNER, L. M. HEAMAN, B. A. KJARSGAARD, R. L. ROMER, A. STRACKE, N. JOYCE, and J. HOEFS Genesis of Ultramafic Lamprophyres and Carbonatites at Aillik Bay, Labrador: a Consequence of Incipient Lithospheric Thinning beneath the North Atlantic Craton J. Petrology, July 1, 2006; 47(7): 1261 - 1315. [Abstract] [Full Text] [PDF]

				S. Klemme Evidence for fluoride melts in Earth's mantle formed by liquid immiscibility Geology, May 1, 2004; 32(5): 441 - 444. [Abstract] [Full Text] [PDF]

				D. Frei, A. Liebscher, G. Franz, and P. Dulski Trace Element Geochemistry of Epidote Minerals Reviews in Mineralogy and Geochemistry, January 1, 2004; 56(1): 553 - 605. [Full Text] [PDF]