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- Volume 6, Issue 7, 1988
First Break - Volume 6, Issue 7, 1988
Volume 6, Issue 7, 1988
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Aeromagnetic reconnaissance of Catalonia, Spain
Authors H.J. Zeyen, E. Banda and E. KlingeléThe lack of aeromagnetic data in Catalonia (NE Spain), where only some unpublished data from the oil industry were available, prompted the Geological Survey of Catalonia to undertake an aeromagnetic survey in an effort to identify the sub-surface geological structure. The survey was carried out during the summers of 1984, 1985 and 1986, covering an area of 32000 km2 with 22000 km of flight lines. This article describes the survey and the residual anomaly map obtained as a final product of it.
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The quantitative interpretation of deep seismic reflection data
By B. RaynaudIn the last decade lower crustal reflections have been observed in deep seismic profiles collected by a number of independent groups using a variety of acquisition techniques (e.g. Schilt et al. 1979; Meissner, Lueschen and Flüh 1983; Brewer et al. 1983). Much effort has been put into interpreting the crustal structure of different geological provinces from these reflections. This paper describes how mathematical modelling can be used to deduce quantitative interpretational rules for deep seismic data and to place constraints on crustal properties. Interpreting deep seismic data is made difficult by the unfamiliarity of lower-crustal structures and the uncertainty of what a reflection profile can resolve at these ranges. In this situation numerical modelling of synthetic seismic reflection data for hypothetical structures is a very powerful method for developing interpretational rules. There are many numerical methods for synthesizing seismic data, each of which is based on a different approximation and is suited to a particular type of seismic experiment. This paper models reflections from major crustal features using the Kirchhoff integral (e.g. Haddon and Buchen 1981) and applies first-order scattering theory (Chernov 1960) to study statistical distributions of crustal features that are too small to be independently resolved.
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Volumes & issues
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Volume 42 (2024)
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Volume 40 (2022)
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Volume 39 (2021)
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Volume 38 (2020)
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Volume 37 (2019)
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Volume 34 (2016)
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Volume 33 (2015)
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Volume 32 (2014)
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Volume 31 (2013)
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Volume 30 (2012)
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Volume 29 (2011)
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Volume 28 (2010)
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Volume 27 (2009)
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Volume 26 (2008)
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Volume 25 (2007)
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Volume 24 (2006)
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Volume 23 (2005)
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Volume 22 (2004)
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Volume 21 (2003)
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Volume 20 (2002)
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Volume 19 (2001)
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Volume 18 (2000)
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Volume 17 (1999)
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Volume 16 (1998)
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Volume 15 (1997)
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Volume 14 (1996)
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Volume 13 (1995)
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Volume 12 (1994)
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Volume 11 (1993)
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Volume 10 (1992)
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Volume 9 (1991)
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Volume 8 (1990)
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Volume 7 (1989)
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Volume 6 (1988)
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Volume 5 (1987)
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Volume 4 (1986)
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Volume 3 (1985)
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Volume 2 (1984)
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Volume 1 (1983)