Meet the editor

Dr. Miloš René, Ph.D. is a scientist at the Institute of Rock Structure and Mechanics, Czech Academy of Sciences. He obtained his MSc in Mineralogy in 1968 and his Ph.D. in Economic Geology from Charles University, Prague, the Czech Republic in 1981. He has published about eighty-five scientific papers in peer-reviewed journals in the fields of mineralogy, petrology, geochemistry, and economic geology. His recent scientific

activity is concentrated on petrology and geochemistry of granitic rocks, mineralogy of accessory minerals, and mineralogy of uranium deposits, especially from the Central European Variscan Belt.

Dr. Gemma Aiello was born in Aversa (CE), Italy, on 24 October 1964. In 1989, she graduated in Geological Sciences at the University of Naples "Federico II." In 1993, she earned a Ph.D. in Sedimentary Geology at the University of Naples "Federico II," Department of Earth Sciences, Faculty of Geological Sciences. She completed a two-year postdoctoral fellowship at the University of Naples "Federico II," a CNR-CEE fellowship and several

contracts at the Research Institute "Geomare Sud," CNR, Naples, Italy. Since 1998, she has been a full-time researcher at the Italian CNR. Dr. Aiello has twenty-five years of experience in the field of sedimentary geology, marine geology and geophysics, participating in different research projects for the Italian National Research Council (CARG, Vector, Centri Regionali di Competenza). She was a contract professor of sedimentology and stratigraphy at the Parthenope University of Naples, Italy, and a teacher in formation courses of technicians in marine science and engineering in Naples, Italy.

Dr. Gaafar El Bahariya is a Professor of Petrology and former head of the Department of Geology, Tanta University, Tanta, Egypt. He holds a Ph.D. in Petrology and Geochemistry from Tanta University through a co-supervision channel with Oklahoma University, Norman, USA. He has published many papers and chapters in books, as well as delivered invited talks. He is the principal investigator on a project funded by the University of

Tanta on gold and iron mineralization and hosting rocks of the Eastern Desert of Egypt. Dr. El Bahariya has attended many international conferences in Japan, Turkey, Morocco, Libya, Saudi Arabia and France, and is a reviewer for many international journals of geosciences. He is a member of the Geological Society of America, Goldschmidt, and Egyptian Geological society. He is a judge member of the Egyptian Promotion Committee. He has good field geology experience of Precambrian geology and his research interests focus on petrology, geochemistry and tectonics.

Contents

**Section 1**

*by Miloš René*

Czech Republic

(Central European Variscides)

*by Gaafar A. El Bahariya*

Southeastern Region of Brazil

**Preface XI**

Geochemistry of Granitic Rocks **1**

**Chapter 1 3**

**Chapter 2 19**

**Chapter 3 39**

**Chapter 4 53**

**Chapter 5 73**

**Chapter 6 99**

An Overview on the Classification and Tectonic Setting of Neoproterozoic

Microstructure Features in Paleo and Neoproterozoic Granitic Rocks,

Deformation Features and Structures in Some Igneous and Metamorphic

*by Benjamin Ntieche, Pauline Wokwenmendam Nguet, Zakari Nchouwet,* 

The Importance of Mechanical Transport, Rock Texture, and Mineral Chemistry in Chemical Weathering of Granites: The Melechov Massif,

*by Václav Procházka, Miroslav Žáček, Petr Sulovský, Tomáš Vaculovič,* 

Changes of Granite Rapakivi under the Biofouling Influence *by Dmitry Yu. Vlasov, Elena G. Panova, Marina S. Zelenskaya, Oksana A. Rodina, Alexey D. Vlasov and Katerina V. Sazanova*

Rocks: A Case Study of Central African Fold Belt in Cameroon

Geochemistry of Granitic Rocks of the Moldanubian Batholith

Granites of the Nubian Shield, Eastern Desert, Egypt

*by Leonardo Gonçalves and Cristiane Castro Gonçalves*

*Mahomed Aziz Mounjouohou and Daouda Mfepat*

*Lenka Rukavičková and Dobroslav Matějka*

### Contents



Preface

Geochemistry is a branch of geological sciences that deals with chemistry rocks and minerals in various igneous, metamorphic and sedimentary processes, from high to

Geochemistry is also an important background for a detailed description of rocks' origin and evolution. Geochemistry is also significant for other geological sciences, especially for dating various rock formations, geological processes and exploration

Geochemistry includes thirteen chapters that discuss the chemical composition of various rock complexes, their structural evolution, the methodology of specific geochemical methods (isotopic geology) and use of geochemical methods for the exploration of mineral deposits, structural geology, stratigraphy and lithology.

Chapter 1, "Geochemistry of Granitic Rocks of the Moldanubian Batholith (Central European Variscides)," by Miloš René focuses on detailed geochemistry of four magmatic suites evolved in one of the largest plutonic complexes within the

Chapter 2, "An Overview on the Classification and Tectonic Setting of Neoproterozoic Granites of the Nubian Shield, Eastern Desert, Egypt," by Gaafar A. El Bahariya presents a comprehensive description of granitoid rocks exposed in the Eastern desert

Chapter 3, "Microstructure Features in Paleo and Neoproterozoic Granitic Rocks, Southeastern Region of Brazil," by Leonardo Gonɕalves and Christiane Castro Gonɕalves provides a mineralogical and microstructural description of granitic rocks exposed in the south-eastern region of Brazil, including detailed information on the geochemical evolution of feldspars during magmatic differentiation and

Chapter 4, "Deformation Features and Structures in Some Igneous and Metamorphic Rocks: A Case Study of Central African Fold Belt in Cameroon," by Benjamin Ntieche, Wokwenmendam Nguet, Zakari Nchouwet, Mahomed Azis Mounjouohou and Daouha Mfepat, is a detailed tectonic study of selected magmatic and metamorphic

Chapter 5, "The Importance of Mechanical Transport, Rock Texture, and Mineral Chemistry in Chemical Weathering of Granites: The Melechov Massif, Czech Republic," by Václav Procházka, Miroslav Žáček, Petr Sulovský, Tomáš Vaculovič, Lenka Rukavičková and Dobroslav Matějka describes the geochemical evolution of selected granitic rocks from the northern part of the Moldanubian batholith, Central European Variscan Belt, during their chemical weathering. The study also partly focuses on the fractionation of the rare-earth elements in these granites.

low temperatures and in various environments.

of various mineral deposits.

European Variscan Belt.

of Egypt and their geotectonic classification.

high-temperature deformation.

complexes in Central Africa.
