Paleomagnetism from Deception Island (South Shetlands archipelago,Antarctica), new insights into the interpretation of the volcanic evolution using a geomagnetic model     

B. Oliva-Urcia  I. Gil-Peña  A. Maestro  J. López-Martínez  J. Galindo-Zaldívar  R. Soto  A. Gil-Imaz  J. Rey  O. Pueyo 《International Journal of Earth Sciences》2016,105(5):1353-1370

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Reconstructing subduction polarity through the geochemistry of mafic rocks in a Cambrian magmatic arc along the Gondwana margin (Órdenes Complex,NW Iberian Massif)   总被引：1，自引：0，他引：1  

P. Andonaegui  S. Sánchez-Martínez  P. Castiñeiras  J. Abati  R. Arenas 《International Journal of Earth Sciences》2016,105(3):713-725

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Analysis and Classification of Natural Rock Textures based on New Transform-based Features     

Rodrigo Lobos  Jorge F. Silva  Julián M. Ortiz  Gonzalo Díaz  Alvaro Egaña 《Mathematical Geosciences》2016,48(7):835-870

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The role of atmospheric circulation in spatial and temporal variations in the structure of currents in the western South China Sea     

G. A. Vlasova  M. N. Demenok  Nguyen Ba Xuan  Bui Hong Long 《Izvestiya Atmospheric and Oceanic Physics》2016,52(3):317-327

Based on numerical simulations, we calculate the integral water circulation of the South China Sea on the eastern Vietnam shelf in the Vietnam coastal current area. The main objective of simulations was to study the hydrodynamic structures of this current in the winter–summer interseasonal period. The calculations were performed for the period from April to June 1999, which had the necessary primary field data. Two types of atmospheric processes were considered: the first is characterized by a small pressure gradient over the South China Sea and the second includes tropical cyclones in the southern part of the sea. The simulation results showed that there are three hydrodynamic gyres in the study area during the given time period: two anticyclonic gyres and a cyclonic gyre that separates them, which together form a complex pattern of the Vietnam current. These gyres persist for the given types of atmospheric processes and are quasi-stationary structures. The Vietnam current carries coastal water masses from south to north within the anticyclonic gyres in summer and from north to south within the cyclonic gyres in winter.  相似文献   

Statistical Distribution Laws for Metallic Mineral Deposit Sizes     

Alberto E. Patiño Douce 《Natural Resources Research》2016,25(4):365-387

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Model for the Processing and Estimation of Dual Frequency Echo Sounder Observations in Detailed Bathymetries   总被引：1，自引：0，他引：1  

Raúl Pereda García  Felipe Piña García  Julio Manuel De Luis Ruiz  Raúl Husillos Rodríguez 《Marine Geodesy》2016,39(3-4):305-320

The dataset acquired by an echo sounder generally comprises outliers and erroneous measurements which must be automatically processed. The main aim of this research is the development and validation of an algorithm which permits detecting outliers, estimating their real value from data acquired with a multifrequency echo sounder, and verifying the measure according to the desired accuracy. The process considers the nature of the seabed and improves the density and number of lectures without globally compromising the precision, but enhancing it in areas with anomalous measurements. Twenty-nine percent of this type of measurements, which would have been otherwise rejected, have been estimated.  相似文献   

Surface-Parallel Sensor Orientation for Assessing Energy Balance Components on Mountain Slopes     

P. Serrano-Ortiz  E. P. Sánchez-Cañete  F. J. Olmo  S. Metzger  O. Pérez-Priego  A. Carrara  L. Alados-Arboledas  A. S. Kowalski 《Boundary-Layer Meteorology》2016,158(3):489-499

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Weibull Wind-Speed Distribution Parameters Derived from a Combination of Wind-Lidar and Tall-Mast Measurements Over Land,Coastal and Marine Sites     

Sven-Erik Gryning  Rogier Floors  Alfredo Peña  Ekaterina Batchvarova  Burghard Brümmer 《Boundary-Layer Meteorology》2016,159(2):329-348

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The Castles Project     

J. A. Muñoz  E. E. Falco  C. S. Kochanek  J. Lehár  B. A. McLeod  C. D. Impey  H.-W. Rix  C. Y. Peng 《Astrophysics and Space Science》1998,263(1-4):51-54

We describe the goals of the CASTLES (CfA-Arizona-Space-Telescope-LEns-Survey) project including a sample of NICMOS images of gravitational lenses and a brief list of the preliminary findings. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

A new sulphur isotopic study of some Iberian Pyrite Belt deposits: evidence of a textural control on sulphur isotope composition     

F. Velasco  J. Sánchez-España  A. J. Boyce  A. E. Fallick  R. Sáez  G. R. Almodóvar 《Mineralium Deposita》1998,34(1):4-18

The sulphide deposits of the Iberian Pyrite Belt (IPB) represent an ore province of global importance. Our study presents 113 new sulphur isotope analyses from deposits selected to represent the textural spectrum of ores. Measured ³⁴S values range from −26 to +10‰ mostly for massive and stockwork ores, in agreement with data previously published. In situ laser ³⁴S analyses reveals a close correlation of ³⁴S with texture. Primary diagenetic textures are dominated by relatively low ³⁴S (−8‰ to −2‰), whereas stockwork feeder textures are dominated by higher ³⁴S (∼+3‰ to +5‰). Intermediate textures (mainly coarse textures in stratiform zones) have intermediate ³⁴S, although they are mostly dominated by the high ³⁴S component. Rare barite has a homogeneous ³⁴S around +18‰, which is consistent with direct derivation from Lower Carboniferous seawater sulphate. A dual source of sulphide sulphur in the IPB deposits has been considered. A hydrothermal source, derived from reduction of coeval seawater sulphate in the convective systems, is represented by sulphide in the feeder zones. Here variations in ³⁴S are caused by variations in the extent of the sulphate reduction, which governs the SO₄:H₂S ratio. The second end-member was derived from the bacterial reduction of coeval seawater sulphate at or near the surface, as reflected in the primary textures. A distinct geographical variation in ³⁴S and texture from SW (more bacteriogenic and primary textures) to NE (more hydrothermal textures and ³⁴S) which reflects a variation in the relative input of each source was likely controlled by local geological environments. Given that the sulphur isotope characteristics of the IPB deposits are unlike most VMS and Kuroko deposits, and noting the dominance of a mixed reduced sedimentary and volcanic environment, we suggest that the IPB could represent an ore style which is intermediate between volcanic and sedimentary hosted massive sulphide types. Received: 8 October 1997 / Accepted: 14 May 1998  相似文献