455 research outputs found
Thermobarometric studies on the Levack Gneisses: Footwall rocks to the Sudbury Igneous Complex
Granulite and amphibolite facies gneisses and migmatites of the Levack Gneiss Complex occupy a zone up to 8 km wide around the northern part of the Sudbury Igneous Complex (SIC). Orthopyroxene- and garnet-bearing tonalitic and semipelitic assemblages of granulite facies grade occur within 3 km of the SIC together with lenses of mafic and pyroxenitic rock compositions normally represented by an amphibole +/- cpx-rich assemblage; amphibolite facies assemblages dominate elsewhere in this terrain. These 2.711-Ga gneisses were introduced by (1) the Cartier Granite Batholith during late Archaean to early Proterozoic time and (2) the SIC, at 1.85 Ga, which produced a contact aureole 1-1.5 km wide in which pyroxene hornfelses are common within 200-300 m of the contact. A suite of 12 samples including both the opx-gt and amphibole-rich rock compositions have been studied. Garnets in the semipelitic gneisses are variably replaced by a plg-bio assemblage. Thermobarometric calculations using a variety of barometers and thermometers reported in the literature suggest that the granulite facies assemblages formed at depths in the 21-28 km range (6-8 kbar). Textures and mineral chemistry in the garnet-bearing semipelitic rocks indicate that this terrain underwent a second metamorphic event during uplift to depth in the 5-11 km range (2-3 kbar) and at temperatures as low as 500-550 C. This latter event is distinct from thermal recrystallization caused by the emplacement of the SIC; it probably represents metamorphism attributable to intrusion of the Cartier Granite Batholith. These data allow two interpretations for the crustal uplift of the Levack Gneisses: (1) The gneisses were tectonically uplifted prior to the Sudbury Event (due to intrusion of the Cartier Batholith); or (2) the gneisses were raised to epizonal levels as a result of meteorite impact at 1.85 Ga
Findings of Fact and Conclusions of Law
USA Proposed Findings of Fact and Conclusions of La
Response by the United States to findings and conclusions and order proposed by the State of Washington
Response by the US to Wash. Proposed Findings and Conclusion
Supplemental exhibit list United States of America
US Supplemental Exhibit Lis
Findings of fact and conclusions of law
USA Proposed Findings of Fact and Conclusions of La
Submission of letter response by U.S.G.S.
Submission of Letter Response by USG
Monte Carlo Study of the Separation of Energy Scales in Quantum Spin 1/2 Chains with Bond Disorder
One-dimensional Heisenberg spin 1/2 chains with random ferro- and
antiferromagnetic bonds are realized in systems such as . We have investigated numerically the thermodynamic properties of a
generic random bond model and of a realistic model of by the quantum Monte Carlo loop algorithm. For the first time we
demonstrate the separation into three different temperature regimes for the
original Hamiltonian based on an exact treatment, especially we show that the
intermediate temperature regime is well-defined and observable in both the
specific heat and the magnetic susceptibility. The crossover between the
regimes is indicated by peaks in the specific heat. The uniform magnetic
susceptibility shows Curie-like behavior in the high-, intermediate- and
low-temperature regime, with different values of the Curie constant in each
regime. We show that these regimes are overlapping in the realistic model and
give numerical data for the analysis of experimental tests.Comment: 7 pages, 5 eps-figures included, typeset using JPSJ.sty, accepted for
publication in J. Phys. Soc. Jpn. 68, Vol. 3. (1999
Barley foliage diseases, field pea diseases.
85BA22, 85MT31, 85N053, 85BA24, 85MT32, 85MT32, 85N052, 85N053, 85BA21, 85MT30, 85BA21, 85BA22, 85MT31, 85MT43, 85KA59, 85KA60, 85M29, 85MT44, 85E22, 85ES22, 85ES23, 85N051, 85BA25, 85WH27, 85C65, 85C69, 85C66, 85C67, 8SKA48, 8SMT34, 85KA47, 85MT33, 85M26, 85ME26, 85KA49, 85KA51.
A.General Notes and Highlights
BARLEY FOLIAGE DISEASES
B. Scald: Screening fungicides
c. Scald: Fungicidal control in Northam district
D. Scald: Effect of seeding rate
E. Scald & Mildew Effect of fungicides and rates
F. Scald & Mildew Seed borne infection and seed dressing
G. Scald & Mildew Effect of seed dressing and spraying
H. Scald & Mildew Effect of Erex and Baytan
I. Mildew: Cultivar x seed dressing
J. Mildew: Comparing fungicides
K. Mildew: Simulated Stubble mulching
L. Mildew: Cultivar mixtures
M. Net-Blotch: Seed borne infection and its control
N. Net-Blotch: Screening fungicides
O. Spot-type Net-Blotch Potential yield losses
P. Spot-type Net-Blotch Effect of date of sowing
Q. Spot-type Net-Blotch Simulated stubble mulching
FIELD PEA DISEASES
R. Black spot: Potential crop losses
S. Black spot: Seed dressings
T. Black spot: Monitoring Air borne infection
U. Black spot: Screening for resistanc
Simulation of Potts models with real q and no critical slowing down
A Monte Carlo algorithm is proposed to simulate ferromagnetic q-state Potts
model for any real q>0. A single update is a random sequence of disordering and
deterministic moves, one for each link of the lattice. A disordering move
attributes a random value to the link, regardless of the state of the system,
while in a deterministic move this value is a state function. The relative
frequency of these moves depends on the two parameters q and beta. The
algorithm is not affected by critical slowing down and the dynamical critical
exponent z is exactly vanishing. We simulate in this way a 3D Potts model in
the range 2<q<3 for estimating the critical value q_c where the thermal
transition changes from second-order to first-order, and find q_c=2.620(5).Comment: 5 pages, 3 figures slightly extended version, to appear in Phys. Rev.
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