 | Wartho, Jo-Anne, Kelley, Simon P., Brooker, Richard A., Carroll, Mike R., Villa, Igor M., Lee, Martin R. (1999) Direct measurement of Ar diffusion profiles in a gem-quality Madagascar K-feldspar using the ultra-violet laser ablation microprobe (UVLAMP) Earth and Planetary Science Letters, 170 (1) 141-153 doi:10.1016/s0012-821x(99)00088-6 | Journal (article/letter/editorial) | | with the previously determined bulk values for Benson Mines orthoclase (activation energy .E/ D 43:8 š 1...kJ mol ) and a Do of 55:0C225:5 44:2 cm s . The new results closely reproduce two sets of apparent activation...with argon release, some of which (e.g., Table 1 New and previously published Ar diffusion parameters...heating) 57 š 2 – 3:5 š 0:5 Madagascar low-sanidine, low-temperature (550–720ºC) array (this study)...0:0374C0:1123 0:0281 – 1826 Madagascar low-sanidine, high-temperature (725–1019ºC) array (this study) |  | | Report (issue) | | Deposits of the St. Lawrence County Magnetite District Northwest Adirondacks New York GEOLOGICAL SURVEY...Deposits of the St. Lawrence County Magnetite District Northwest Adirondacks New York By B. F. LEONARD...____________________________ Rocks of the St. Lawrence County magnetite district. Metasedimentary rocks...composition of minerals._______ Introduction of new minerals...-.________ Chemical character of the ore..._________________ Grade and extent-______________ Lake Marian (Rampart Mountain) prospects. __ Location |  | | Journal (article/letter/editorial) | | because it implies that the kucite i- kalsilite f sanidine equilibrium would be achieved at a temperature...and from thermochemical data for kalsihte and sanidine from HELGESONet al. ( 1978 ). An alternative determination...andalusite and quartz-free assemblage. Indeed, the sanidine solubility measurement of MOREY and HESSELGBSSER...product of water substance, 0-lOOO”C, l-loo00 bars new international formulation and its background. J....Report WRD-74-001. PEARSOND., COPELAND C. S. and BENSONS. H. ( 1963) The electrical conductance of aqueous |  | | Journal (volume) | | Agnew, John A .... 89S Editorial Co Alaska Gold Mines Editorial .... 475 Alaska Treadwell .... 441 Editorial...review L. B. Lockhart Amprican-made gold-dred?e for New Zealand . . . . . . . . . . . . 15 20...619, 659 399 217 34 329 Belt-conveyors Joining, new booklet on E. J. Black.... Selection and treatment...Bourne. F. J. .Human factor in mine management. ... A new track-scale. Boyer, L. R Bradford flotation process...F Record for cheap minin?. Colorado School of Mines Editorial. Combinations of gold J. H. Mockett, Jr |  | | Book | | D005005470 J. N. CRAMSIE, DIRECTOR GEOLOGICAL SURVEY OF NEW SOUTH WALES Cover photo: Quartz - mudstone - stibnite...Data Sheets. 509 pp. New South Wales Geological Survey. Sydney. ISSNQ7279418 © New South Wales Department...DEPOSIT DATA SHEETS Unpublished reports held by the New South Wales Depanment of Mineral Resources INDEX...FIGURES Figure 1. Geological subdivision of the New England Fold Belt 7 Figure 2. Granitoid belts...assessment of the mineral resources of the New England Fold Belt· in New South Wales. This program is a continuation |
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