|
|
 |
|||||||||||||||||
|
|||||||||||||||||
 |
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
Letter |
Sciences de la Terre, Université du Québec à Chicoutimi, Chicoutimi, G7H 2B1, Canada
Correspondence: * E-mail: mhiggins{at}uqac.ca
Crystal size distribution (CSD) measurements are susceptible to the closure problem, just like chemical compositions. In its simplest form this means that the total crystal content of a rock cannot exceed 100%. Where chemical or thermal effects limit the total quantity of a single phase, closure can occur at lower volumetric phase proportions. This means that parts of the CSD diagram [ln(population density) vs. size] are not accessible. If the volumetric phase proportion is constant, then straight CSDs will appear to rotate around a point at small sizes giving a fan of CSDs. These fans are significant and do show changes in crystal sizes that can be interpreted in terms of magmatic processes. However, the correlation between the slopes (or characteristic lengths) and intercepts of individual CSDs in a family is not significant, but just a consequence of the constant phase proportion effect. Many other graphs, such as characteristic length vs. volumetric phase proportion, can give more information on magmatic processes.
This article has been cited by other articles:
|
|
 |
|
  B. O'Driscoll, C. T. E. Stevenson, and V. R. Troll Mineral Lamination Development in Layered Gabbros of the British Palaeogene Igneous Province: A Combined Anisotropy of Magnetic Susceptibility, Quantitative Textural and Mineral Chemistry Study J. Petrology, June 1, 2008; 49(6): 1187 - 1221. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. D. Greenough and B. J. Fryer TRACE-ELEMENT EVIDENCE FOR VOLATILE-INFLUENCED DIFFERENTIATION IN A FLOW OF ALKALI BASALT, PENG HU ISLAND, TAIWAN Can Mineral, April 1, 2008; 46(2): 305 - 315. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. Berger, N. Ennih, J.-P. Liegeois, C. Nkono, J.-C. C. Mercier, and D. Demaiffe A complex multi-chamber magmatic system beneath a late Cenozoic volcanic field: evidence from CSDs and thermobarometry of clinopyroxene from a single nephelinite flow (Djbel Saghro, Morocco) Geological Society, London, Special Publications, January 1, 2008; 297(1): 509 - 524. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. D. Higgins and D. Chandrasekharam Nature of Sub-volcanic Magma Chambers, Deccan Province, India: Evidence from Quantitative Textural Analysis of Plagioclase Megacrysts in the Giant Plagioclase Basalts J. Petrology, May 1, 2007; 48(5): 885 - 900. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. O'Driscoll, C. H. Donaldson, V. R. Troll, D. A. Jerram, and C. H. Emeleus An Origin for Harrisitic and Granular Olivine in the Rum Layered Suite, NW Scotland: a Crystal Size Distribution Study J. Petrology, February 1, 2007; 48(2): 253 - 270. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. S. GEE, W. P. MEURER, P. A. SELKIN, and M. J. CHEADLE Quantifying Three-Dimensional Silicate Fabrics in Cumulates Using Cumulative Distribution Functions J. Petrology, October 1, 2004; 45(10): 1983 - 2009. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
A. ZEH Crystal Size Distribution (CSD) and Textural Evolution of Accessory Apatite, Titanite and Allanite during Four Stages of Metamorphism: an Example from the Moine Supergroup, Scotland J. Petrology, October 1, 2004; 45(10): 2101 - 2132. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. BOORMAN, A. BOUDREAU, and F. J. KRUGER The Lower Zone-Critical Zone Transition of the Bushveld Complex: a Quantitative Textural Study J. Petrology, June 1, 2004; 45(6): 1209 - 1235. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D. A. JERRAM, M. J. CHEADLE, and A. R. PHILPOTTS Quantifying the Building Blocks of Igneous Rocks: Are Clustered Crystal Frameworks the Foundation? J. Petrology, November 1, 2003; 44(11): 2033 - 2051. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. M. Castro, J. M. Castro, K. V. Cashman, and M. Manga A technique for measuring 3D crystal-size distributions of prismatic microlites in obsidian American Mineralogist, August 1, 2003; 88(8-9): 1230 - 1240. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. D. HIGGINS and J. ROBERGE Crystal Size Distribution of Plagioclase and Amphibole from Soufriere Hills Volcano, Montserrat: Evidence for Dynamic Crystallization-Textural Coarsening Cycles J. Petrology, August 1, 2003; 44(8): 1401 - 1411. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
I. PETRIK, P. I. NABELEK, M. JANAK, and D. PLASIENKA Conditions of Formation and Crystallization Kinetics of Highly Oxidized Pseudotachylytes from the High Tatras (Slovakia) J. Petrology, May 1, 2003; 44(5): 901 - 927. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
D.D. Eberl, D. E. Kile, and V.A. Drits On geological interpretations of crystal size distributions: Constant vs. proportionate growth American Mineralogist, August 1, 2002; 87(8-9): 1235 - 1241. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
Y. Pan Comments on: Higgins: "Closure in crystal size distributions (CSD), verification of CSD calculations, and the significance of CSD fans" American Mineralogist, August 1, 2002; 87(8-9): 1242 - 1243. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. D. Higgins Reply to comment on "Closure in crystal size distributions (CSD), verification of CSD calculations and the significance of CSD fans" American Mineralogist, August 1, 2002; 87(8-9): 1244 - 1244. [Full Text] [PDF]
|
|
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
