A paleomagnetic and isotopic age for the Wackerfield Dyke of northern England     

D.H. Tarling  J.G. Mitchell  Henry Spall 《Earth and Planetary Science Letters》1973,18(3):427-432

The Wackerfield Dyke is exposed in northern England and its field relationships suggest it could be related to the Eocene Mull Dyke Swarm. Wackerfield Dyke specimens taken from below the zone of surface weathering have a natural remanent magnetization that is extremely stable to thermal and alternating field demagnetization. Stability is expected because the Fe-Ti oxides are highly oxidized. The stable magnetization is identical with a primary remanence that can be isolated from certain samples of the Whin Sill of northern England, and gives a mean pole at 175°E, 22°N (dp = 2°, dm = 3°). An Upper Carboniferous age for the Wackerfield Dyke is confirmed by a K-Ar whole rock age of 303 my.  相似文献   

Geological investigations of the North Pacific | James D. Hays (Editor), 1970. Memoir 126, Geological Society of America,Boulder, Colo., 323 pp., U.S. $ 15.00 (Place orders from continental Europe with Office International de Librairie, 30 Avenue Marnix,B-1050 Brussels)     

Henry W. Menard 《Earth》1973,9(1):78

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Preliminary tests on large-scale suppression of warm fog by means of giant monodisperse particulates. Part I. The first Ghedi-Monte Orfano experiment     

Alberto C. Montefinale  Henry M. Papee 《Pure and Applied Geophysics》1970,83(1):167-172

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Recent advances in the chemistry and properties of atmospheric nucleants: a review     

Alberto C. Montefinale  Tito Montefinale  Henry M. Papée 《Pure and Applied Geophysics》1971,91(1):171-210

Summary A survey is carried out of recent progress in the investigation of weather-active atmospheric nucleants. Emphasis is placed on the work date during the last decade, and some resulting implications are discussed.  相似文献   

Eclogite xenoliths from stockdale kimberlite,Kansas     

Henry O. A. Meyer  Douglas G. Brookins 《Contributions to Mineralogy and Petrology》1971,34(1):60-72

Six kimberlite pipes of late Cretaceous or Tertiary age occur in Riley Co., east-central Kansas. Within the pipes xenoliths of local sedimentary and exotic igneous rocks are common, especially in the Stockdale pipe. Igneous rocks which occur as xenoliths include granite, gabbro, metagabbro, pyroxenite and eclogite. In the eclogites omphacitic clinopyroxene (approx. Di₅₂Jd₂₄mol%) and pyropic garnet (approx. Py₄₇Al₃₅Gr₁₂mol%) are the predominant minerals with subordinate amounts of rutile and sulphides (pyrrotite-pentlandite (?)-chalcopyrite). Interstitial kaersutitic amphibole is a minor constituent. The eclogites are chemically equivalent to olivine-basalt. The texture, composition and mineralogy of the eclogites from Kansas are similar to those of eclogites from kimberlite pipes in South Africa and Siberia. Whereas the rocks from these latter localities display a range in composition, those examined to date from Kansas are of fairly restricted composition. Furthermore it seems probable that the eclogites from Stockdale formed under limited P-T conditions within the mantle. This is the first record of such eclogites on the North American continent.  相似文献   

Effect of chloride concentration on the decomposition of aqueous sodium nitrate by sunlight     

Gianna L. Petriconi  Enrico G. Gori  Henry M. Papée 《Pure and Applied Geophysics》1969,72(1):299-306

Summary Rates and yields of nitrite formation in solutions, upon irradiation of aqueous sodium nitrate with ultraviolet light, are found to be consistently and considerably enhanced by their chloride content. The process is investigated under conditions met both, in the laboratory and under sunlight illumination, and the effects of altitude and temperature on the reaction studied in the field, are evaluated.  相似文献   

Correlation of atmospheric occurences over the United States with some physical and chemical parameters. Part IV: Frequencies of hail     

A. C. Montefinale  Liliana A. Masironi  Henry M. Papée 《Pure and Applied Geophysics》1963,54(1):212-215

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Thermodynamics of plagioclase-melt equilibria in the system albite-anorthite-diopside     

D.J. Henry  A. Navrotsky  H.D. Zimmermann 《Geochimica et cosmochimica acta》1982,46(3):381-391

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A Re - Assessment of the Criteria for Certifiability in CCRMP     

Henry F. STEGER 《Geostandards and Geoanalytical Research》1982,6(1):17-23

The effect of the between- and within-laboratory standard deviation and of the number of laboratories on the magnitude of the certification factor, CF, introduced in 1975 by the Canadian Certified Reference Materials Project (CCRMP) has been discussed. The applicability of CF to reference materials has been assessed on the basis of the correlation between the between- and within-laboratory standard deviation. The validity of the critical value of 4 for CF for certifiability is examined.
An examination of all available data has led to the conclusion that the quality of an interlaboratory program is sufficient to warrant certifiability only if the ratio of the between-to the within-laboratory standard deviation is 3 or less for most elements and 2 or less for uranium. It has been shown that the number of laboratories rejected based on the upper limit of this ratio differs only slightly from that based on laboratory means differing by more than twice the standard deviation of the overall mean for the majority of elements that have been certified. A new measure for assessing the certifiability of an element has been introduced and is based on the requirement that the percentage of laboratories that are rejected to give a ratio of the between- to within-laboratory standard deviation less than or equal to the critical value of 3 or, for uranium, 2 should be no greater than 15% regardless of the number of laboratories in the certification program.  相似文献   

Comparison of strain and magnetic fabrics in Dalradian rocks from the southwest Highlands of Scotland     

Jaswant Singh Rathore  Bernard Henry 《Journal of Structural Geology》1982,4(3):373-384

The magnetic fabrics of 235 samples from 31 localities in Argyllshire, Scotland were determined to study the development of the Caledonian tectonic fabric in the southwest Highlands of Scotland. The regional fabric indicates a strong NE-SW compressional foliation due to the primary deformational phases, which in parts has been overprinted by secondary deformations. A detailed comparison of the anisotropy data and the available strain data shows that the two fabric ellipsoids are co-axial, and that their axial mean ratios seem to be related by an empirical power relationship of the type: (for i = 1,2,3; j = 1,2,3 and i ≠ j) where χ_i and χ_j are orthogonal principal axes and l_i and l_j are the corresponding orthogonal principal strain axes. The exponent a for the sites from Scotland is 0.088 ± 0.017 compared with 0.142 ± 0.001 and 0.145 ± 0.005 found in the Caledonian slates of the English Lake District and the Welsh slate belt.  相似文献