The use of values of gravity in the adjustment of the triangulation of Europe     

W. D. Lambert 《Journal of Geodesy》1947,21(1):19-22

Sans résumé

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The use of values of gravity in the adjustment of the triangulation of Europe

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A rapid approach to estimate the rockfall energies and distances at the base of rock cliffs   总被引：1，自引：0，他引：1  

Federica Ferrari  Klaus Thoeni  Anna Giacomini  Cedric Lambert 《Georisk: Assessment and Management of Risk for Engineered Systems and Geohazards》2016,10(3):179-199

This paper presents a new methodology for estimating the expected energies and first impact distances at the base of a rock cliff, subject to the geometry and properties of the cliff and the representative block being known. The method is based on a sensitivity analysis, conducted by means of kinematic simulations and carried out for a large range of input parameters and their combinations, taking into account the uncertainty associated with their estimate. The proposed approach is validated by comparing predictions to experimental data and shows great potential for a quick qualitative hazard assessment.  相似文献   

Erratum to: The cloud radiative effect on the atmospheric energy budget and global mean precipitation     

F. Hugo Lambert  Mark J. Webb  Masakazu Yoshimori  Tokuta Yokohata 《Climate Dynamics》2015,44(7-8):2327-2327

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Can bars be destroyed by a central mass concentration?– I. Simulations     

E. Athanassoula  J. C. Lambert  W. Dehnen 《Monthly notices of the Royal Astronomical Society》2005,363(2):496-508

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Elemental abundance survey of the Galactic thick disc     

Bacham E. Reddy  David L. Lambert  Carlos Allende Prieto 《Monthly notices of the Royal Astronomical Society》2006,367(4):1329-1366

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The isotopic mixture of barium in the metal-poor subgiant HD 140283     

David L. Lambert  Carlos Allende Prieto 《Monthly notices of the Royal Astronomical Society》2002,335(2):325-334

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Spectroscopic Characterization of Humic-Like Substances in Airborne Particulate Matter   总被引：2，自引：0，他引：2  

N. Havers  P. Burba  J. Lambert  D. Klockow 《Journal of Atmospheric Chemistry》1998,29(1):45-54

In a standard reference air dust (NIST 1648 – urban particulate matter) as well as in airborne particulate matter collected in German urban and rural areas (Dortmund, Sauerland) 10% and more of the organic carbon can be attributed to macromolecular substances like humic and fulvic acids (HA, FA). Indirect evidence for the presence of humin was also obtained. HA and FA extracted from NIST 1648 and other urban and rural atmospheric particles using 0.1 m NaOH and isolated by ion-exchangers were characterized by their molecular-size distribution applying multistage ultrafiltration, their carbon content and their UV/VIS, Fourier-transformed infrared (FTIR) and nuclear magnetic resonance (¹H-NMR) spectra. Summarizing, the structural studies exhibit that these humic-like substances (HULIS) contained in air dust samples are small in their molecular size and rich in aliphatic and carbohydrate substructures compared to HA and FA from soils and aquatic systems.  相似文献   

Relationship between value of open space and distance from housing locations within a community     

Seong-Hoon Cho  Dayton M. Lambert  Seung Gyu Kim  Roland K. Roberts  William M. Park 《Journal of Geographical Systems》2011,13(4):393-414

This research uses a sequence of hedonic spatial regressions for a metropolitan housing market in the Southeastern United States to explore a new procedure that establishes the relationship between the value attributable to open space and distance from housing locations (a “distance-decay function”) within a given community. A distance-decay function allows identification of the range of distance over which open space affects housing values and the estimation of a proxy for the value added to nearby houses resulting from hypothetical open space preservation. Ex post analyses of the open-space regression coefficients suggest marginal implicit price functions for three types of open space that decay as open space area increases with respect to house location. After controlling for other factors in the spatial hedonic model, simple distance-decay functional relationships were established between the implicit prices of developed open space, forest-land open space, and agriculture-wetland open space and the buffer radius of the open-space areas surrounding a given housing location. The proposed method may be useful for identifying the range over which preferences for different types of open space are exhibited.  相似文献   

A reconnaissance study of stable isotope ratios in archaean rocks from the yilgarn block,Western Australia     

T. H. Donnelly  I. B. Lambert  D. Z. Oehler  J. A. Hallberg  D. R. Hudson  J. W. Smith 《Australian Journal of Earth Sciences》2013,60(7-8):409-420

Isotopic compositions of sulphur, carbon, and oxygen have been determined for constituents from a total of 103 samples of sedimentary rocks, mafic and ultramafic igneous rocks, nickel ores, and gold ores from the Archaean Yilgarn Block.

Sulphides in the bulk of the sedimentary rocks have δ³⁴S values close to 0‰ and appear to have precipitated from solutions which incorporated magmatic sulphur (either juvenile or derived from older rocks). There is no evidence for widespread sulphate reduction.

δ³⁴S values of sulphides in the nickel deposits and associated mafic/ultramafic igneous rocks are within the magmatic range. The small, high‐grade deposits of the Kambalda‐Nepean‐Scotia type have small positive δ³⁴S values, and the large, low‐to‐medium grade dunite‐associated deposits of the Mount Keith‐Perseverance type have small negative δ³⁴S values.

Sulphides in the Kalgoorlie gold ores are enriched in ³²S relative to those in their host dolerite, supporting an epigenetic origin for the gold, under moderately high fO₂ conditions.

The δ¹³C values do not provide unequivocal evidence for the source(s) of the reduced carbon (kerogen) in the sedimentary rocks. Whilst they are compatible with biogenic derivation, it is not possible to rule out contributions from pre‐biotic organic ‘soup’ or from hydrothermal solutions of deep‐seated origin.

Carbonate in the sedimentary rocks are predominantly in epigenetic, sulphide‐bearing veinlets. In many cases, their δ¹³C values suggest precipitation from hydro‐thermal solutions containing magmatically derived CO₂. In only two samples are the petrographic features and δ¹³C values compatible with marine carbonates. Talc‐carbonate altered ultramafic igneous rocks have δ¹³C values consistent with their incorporation of magmatically derived CO₂.

The ?δ¹³C (carbonate‐kerogen) values for most of the sedimentary rock studied fall in a narrow range around +10‰, suggesting isotopic exchange between oxidized and reduced carbon species at moderately high temperatures (>250°C).

δ¹⁸O values of carbonate from both sedimentary rocks and igneous rocks are mainly within the range +7.2‰ to +18.0‰. If the values are primary they are consistent with the formation of carbonate from hydrothermal solutions of magmatic and/or metamorphic origin. However, it is also possible the δ¹⁸O values are the result of post‐depositional equilibration with meteoric waters.  相似文献   

Regional thermal history of the Lennard shelf,Canning Basin,from apatite fission track analysis: Implications for the formation of Pb‐Zn ore deposits     

D. C. Arne  P. F. Green  I. R. Duddy  A. J. W. Gleadow  I. B. Lambert  J. F. Lovering 《Australian Journal of Earth Sciences》2013,60(4):495-513

Zinc mineralization in Devonian carbonates of the Lennard Shelf, northern Canning Basin is similar in many respects to that of the Mississippi Valley‐type including estimated minimum temperatures of sulphide precipitation between 70 and 110°C. Apparent apatite fission track ages for Precambrian granitic basement and for detrital apatites in Devonian carbonates in and near Pb‐Zn mineralization generally range between 260 and 340 Ma, with Precambrian samples tending to have slightly older apatite fission track ages than the Devonian carbonates. These apparent ages are younger than the stratigraphic age of the material analysed, indicating that appreciable annealing of fission tracks in apatite has occurred in post‐Devonian times. Mean horizontal confined track lengths are 12–13 μm for most samples and preclude attaching any ‘event’ significance to the fission track ages. Studies of well sequences (Grevillea 1 and Kennedia 1) indicate a period of rapid uplift in the area during the Late Triassic/Early Jurassic. Assuming a constant geothermal gradient of 30°C/km, approximately 1.5 km of uplift and erosion is estimated. Immediate thermal effects related to Miocene lamproite intrusion into Precambrian basement appear to be restricted to within 200 m of the contact zone.

For outcropping Devonian carbonates, a thermal history is proposed involving burial in the Late Palaeozoic/Early Mesozoic, followed by uplift and cooling from peak temperatures around 70–80°C in mid‐Mesozoic times. With reference to this period of burial, Pb‐Zn occurrences represent thermal anomalies when reported fluid inclusion homogenization temperatures are compared with the estimated peak temperatures. However the possibility of a phase of higher temperatures during the Late Devonian/ Early Carboniferous is suggested by the apatite fission track results, in which case sulphide mineralization may reflect ambient regional temperatures if it formed at that time. The absence of enhanced annealing effects in detrital apatites proximal to Pb‐Zn deposits suggests that either sulphide mineralization preceded or accompanied peak regional temperatures suspected during the Late Devonian/Early Carboniferous, or that the mineralizing episodes were of too short a duration to significantly anneal fission tracks in apatite.  相似文献