Preface: clay mineral diagenesis and very low-grade metamorphic processes. Proceedings of the 2011 Frey–Kübler symposium

Swiss Journal of Geosciences, Jul 2012

Rafael Ferreiro Mählmann, Fernando Nieto, Ömer Bozkaya, Sébastien Potel, Asuman Günal Türkmenoğlu

A PDF file should load here. If you do not see its contents the file may be temporarily unavailable at the journal website or you do not have a PDF plug-in installed and enabled in your browser.

Alternatively, you can download the file locally and open with any standalone PDF reader:

https://link.springer.com/content/pdf/10.1007%2Fs00015-012-0114-4.pdf

Preface: clay mineral diagenesis and very low-grade metamorphic processes. Proceedings of the 2011 Frey–Kübler symposium

Swiss J Geosci Preface: clay mineral diagenesis and very low-grade metamorphic processes. Proceedings of the 2011 Frey-Ku bler symposium Rafael Ferreiro Mahlmann 0 1 2 3 4 Fernando Nieto 0 1 2 3 4 O mer Bozkaya 0 1 2 3 4 Sebastien Potel 0 1 2 3 4 Asuman Gu nal Tu rkmenoglu 0 1 2 3 4 0 O . Bozkaya Department of Geological Engineering, Cumhuriyet Technical University , 58140 Sivas , Turkey 1 F. Nieto Departamento de Mineralog a y Petrolog a and IACT, Universidad de Granada, CSIC , Av. Fuentenueva, 18002 Granada , Spain 2 R. Ferreiro Ma hlmann (&) Technical and Low Temperature Petrology, Institut fu r Angewandte Geowissenschaften, Technische Universita t Darmstadt , Schnittspahnstrae 9, 64287 Darmstadt , Germany 3 A. G. Tu rkmenog lu Turkish National Committee on Clay Science, Department of Geological Engineering, Middle East Technical University , 06531 Ankara , Turkey 4 S. Potel Institut Polytechnique LaSalle Beauvais , Equipe B2R, 19 rue Pierre Waguet, BP 30313, 60026 Beauvais Cedex , France (i) Geologists who wanted to use low-grade metamorphic petrologic, geochemical, clay mineralogical, isotopic and coal petrographic methods for their specific studies (e.g. in sedimentary geology, basin analysis, hydrocarbon geology, and regional metamorphic geology), (ii) Research scientists interested in methodical and process aspects of diagenesis and low-grade metamorphism, and (iii) Structural geologists with specialization in orogenic research. 1 Introduction In 2002, after the death of Prof. Bernard Kubler (Univ. Neuchatel) and Prof. Martin Frey (Univ. Basel), Schmidt and Ferreiro Mahlmann published a special issue on Diagenesis and Low-Grade Metamorphism in the Swiss Bulletin of Mineralogy and Petrology. Most contributions had been presented during the Symposium on Diagenesis and Low-Grade Metamorphism at the EUG meeting 2001 in Strasbourg, France, and had been dedicated to the two most important researchers in that field. The underlying philosophy of the Diagenesis and Low-Grade Metamorphism issue, was to provide a compilation of the state of the art in very low-grade metamorphic (VLGM) and low temperature petrologic research to: Frey had strong interest in and have strongly influenced those specific fields. For this reason, two topics were selected for the FreyKubler Symposium: 1. Elucidating geothermal evolutions of basins and orogenic wedges using clay mineral indices (regional case studies, tectono-metamorphic studies and metamorphic mapping), and 2. New advances in palaeo-geothermometry: comparing clay mineral indices with other methods (theoretical approaches, new methods and improvements in methodology and calibration methods to determine grade of diagenesis and metamorphism). It is a pleasure to realize that nearly all contributors to the FreyKubler symposium at EUROCLAY in Antalya 2011 have submitted their presentation for publication in this issue. 2 Content of the issue The issue starts with a review study by the four chairman of the symposium together with B. S egvic and R. Le Bayon (Ferreiro Mahlmann et al.), which gives a historical view of the pioneer work of Martin Frey and Bernard Kubler and the evolution of very low-grade studies in the last five decades. This review covers their research in the Alps, stressing the Kubler-Index (KI) versus vitrinite reflectance (VR) and bituminite reflectance (BR) correlation. We discuss also the progress in understanding the physical meaning of the KI since the studies of Merriman et al. (1990); S rodon et al. (1992); Nieto and Sanchez-Navas (1994) and A rkai et al. (1996). In comparison with KI, VR and BR data give different regressions and slope trends depending on the geodynamic conditions. Finally a critical discussion of the geo-thermometric use of KI and VR data (including Raman studies) is presented. For comparison of VR and BR with KI data, a unified and homogeneous data set of values is necessary. The study refers to nearly 5,000 values compiled and correlated with the help of an inter-laboratory calibration study (Ferreiro Mahlmann and Frey). At the same time the study is a late result of the data compilation for the metamorphic maps of the Alps under the leadership of Frey et al. (1999) and Oberhansli et al. (2004). Problems to include all published data from the Alps are due to different preparation and measurement techniques. It is shown in the review that standardisation and calibration of methods used to determine grade of diagenesis to incipient metamorphism are a fundamental pre-condition to successfully draw VLGM maps (Frey and Ferreiro Mahlmann 1999) and to reconstruct paleo-geothermal conditions and geodynamic settings. The following contributions are arranged according to the two topics of the FreyKubler symposium starting with two studies showing the methodical progress to determine grade of diagenesis to low-grade metamorphism and methods to calibrate the clay indices (Ferreiro Mahlmann and Frey; Le Bayon). The first study (...truncated)


This is a preview of a remote PDF: https://link.springer.com/content/pdf/10.1007%2Fs00015-012-0114-4.pdf

Rafael Ferreiro Mählmann, Fernando Nieto, Ömer Bozkaya, Sébastien Potel, Asuman Günal Türkmenoğlu. Preface: clay mineral diagenesis and very low-grade metamorphic processes. Proceedings of the 2011 Frey–Kübler symposium, Swiss Journal of Geosciences, 2012, pp. 117-120, Volume 105, Issue 2, DOI: 10.1007/s00015-012-0114-4