The Westernmost Tethys Blog Geology mapping, basin analysis and 3D modeling

09/03/2021

New project to study sedimentary basins.

Filed under: basin analysis,geodynamic evolution,PID2020-114381GB-I00,Team — messinianalicante @ 8:08 AM

The Spanish research agency (Agencia Estatal de Investigación) of the Spanish Science and innovation minister (Ministerio de Ciencia e Innovación)  has conceded a new project to study the Cenozoic sedimentary basins entitle as “EVOLUCION TECTONO-DEPOSICIONAL DE CUENCAS SEDIMENTARIAS CENOZOICAS: CARACTERIZACION 2D-3D Y MEJORA DE PATRONES ESTANDAR” (PID2020-114381GB-I00).

This research project  will develop techniques for the analysis of various types of Cenozoic sedimentary basins in a general compressive or convergent framework (associated with strike-slip faults, transported -piggy-back or wedge-top-, and complex foreland systems). The stratigraphic architecture, biostratigraphic control of the different sedimentary bodies, stratigraphic discontinuities will be studied, as well as  sediments  sources (both terrigeneous and biogenic) through mineralogical, petrographic and geochemical studies.

TEAM

Principal investigator: Manuel Martín-Martín (Alicante University)

Jesús M. Soria (Alicante University)

Manuel Bullejos Lorenzo (Granada University)

Antonio Sánchez Navas (Granada University)

Agustín Martín-Algarra (Granada University)

José Enrique Tent-Manclús (Alicante University)

Josep Tosquella (Huelva University)

Carlos Ureña Almagro (Granada University)

Fernando Pérez-Valera (Alicante University)

Francisco Javier Alcalá-García (Instituto Geológico y Minero de España, IGME)

Estelle Mortimer (University of Leeds)

Douglas Patton (University of Leeds)

Francesco Perri (Calabria University)

Salvatore Critelli (Calabria University)

Crina Miclaus (Alexandru Ioan Cuza University)

Francisco Serrano (Malaga University)

01/29/2020

Compactation in sedimentary basins

Filed under: basin analysis,simulation — Tags: , , — messinianalicante @ 8:59 AM

Subsidence analysis is an important technique in the study of sedimentary basins but the effects of compaction must be “backstripped”. The compaction of sediments is also of importance for petroleum and water reservoir research with very important economic derivations. Most methods for calculating compaction are based on empirically derived porosity-depth relationships from a variety of known sediment types. The challenge of this paper is to apply alternative methods for calculating compaction in sedimentary basins based on: physical calculation with elastic by Steinbrenner, oedometric and change of the specific weight of the sediment methods; and use of Loadcap software.

The Triassic to Lower Miocene 3025m thick succession of Sierra Espuña (SE Spain) is used as case study for the calculations. In this succession former mineralogical studies and apatite fission-track suggested an original thickness between 4 and 6km. The validity of each one of the proposed methods is discussed, as well as, compared for the whole succession compaction but also separately for hard vs soft sediments and for thick vs thin beds.

Accumulate thickness-age (My) graphic with the comparative of the measured thickness and the results of original accumulate thickness along time of the studied succession after decompaction with the whole methods. The mean thickness with the whole methods is also represented with dash line. Key: ESM: elastic by Steinbrenner; SWM: specific weight of the sediment methods; OM: oedometric method; PCM: porosity change method (Bond et al., 1983); LSM: use of Loadcap software method.

The compaction values obtained with the alternative methods are similar to those resulting with the lower-limit curves of the porosity-depth change method. The new methods have provided values slightly higher than 4km for the whole original thickness using the geotechnical software and the change of the sediments specific weigh methods; meanwhile values below 4km for other methods. So, in our opinion, the geotechnical software and the change of the specific weight of the sediment methods are compatible with mineralogical constraints and also, the input data are usually better known and easier to determinate. Otherwise, the elastic method seems only accurate for soft sediments; meanwhile the oedometric method is highly influenced by the thickness of the considered beds.

 

Cite as: Martín-Martín, M., and Robles-Marín, P. (2020): Alternative methods for calculating compaction in sedimentary basins. Mar. Pet. Geol. 113, 104132. doi: 10.1016/j.marpetgeo.2019.104132

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