Today environmental problems of unprecedented magnitude confront planet earth. The sobering fact is that a whole range of human activities is affecting our global environment as profoundly as the billions of years of evolution that preceded our tenure on Earth. The pressure on vital natural resources in the developing world and elsewhere is intense, and the destruction of tropical forests, wildlife habitat, and other irreplaceable resources, is alarming. Climate change, ozone depletion, loss of genetic diversity, and marine pollution are critical global environmental concerns. Their cumulative impact threatens to destroy the planet's natural resources. The need to address this situation is urgent. More than at any previous moment in history, nature and ecological systems are in human hands, dependent on human efforts. The earth is an interconnected and interdependent global ecosystem, and change in one part of the system often causes unexpected change in other parts. Atmospheric, oceanic, wetland, terrestrial and other ecological systems have a finite capacity to absorb the environmental degradation caused by human behavior. The need for an environmentally sound, sustainable economy to ease this degradation is evident and urgent. Policies designed to stimulate economic development by foregoing pollution controls both destroy the long-term economy and ravage the environment. Over the years, we have sometimes drawn artificial distinctions between the health of individuals and the health of ecosystems. But in the real world, those distinctions do not exist.
Fluid-aided mass transfer and subsequent mineral re-equilibration are the two defining features of metasomatism and must be present in order for metamorphism to occur. Coupled with igneous and tectonic processes, metasomatism has played a major role in the formation of the Earth’s continental and oceanic crust and lithospheric mantle as well as in their evolution and subsequent stabilization. Metasomatic processes can include ore mineralization, metasomatically induced alteration of oceanic lithosphere, mass transport in and alteration of subducted oceanic crust and overlying mantle wedge, which has subsequent implications regarding mass transport, fluid flow, and volatile storage in the lithospheric mantle overall, as well as both regional and localized crustal metamorphism. Metasomatic alteration of accessory minerals such as zircon or monazite can allow for the dating of metasomatic events as well as give additional information regarding the chemistry of the fluids responsible. Lastly present day movement of fluids in both the lithospheric mantle and deep to mid crust can be observed utilizing geophysical resources such as electrical resistivity and seismic data. Such observations help to further clarify the picture of actual metasomatic processes as inferred from basic petrographic, mineralogical, and geochemical data. The goal of this volume is to bring together a diverse group of geologists, each of whose specialities and long range experience regarding one or more aspects of metasomatism during geologic processes, should allow them to contribute to a series of review chapters, which outline the basis of our current understanding of how metasomatism influences and helps to control both the evolution and stability of the crust and lithospheric mantle.
The idea of dedicating a Festschrift to honor Professor Frédéric Manns on the happy occasion of his 70th birthday came to mind in the autumn of 2011 and work on this project had been continuing ever since. Felicitously achieving this goal, the Faculty of Biblical Sciences and Archaeology (Studium Biblicum Franciscanum) and the Franciscan Custody of the Holy Land present this volume to Father Manns with gratitude for his profound scholarship and a lifetime service in the Holy Land. Perusing through Father Manns’ writings, it is easy to see a prominent and distinctive place devoted to the Gospel of John. It seemed therefore suitable to focus on this subject in the Festschrift honoring him: the title, Rediscovering John, relates to Manns’ significant contribution towards the better understanding of the Fourth Gospel. The volume comprises 21 studies authored by renowned scholars from various parts of the world, from different institutions and denominations. While the first half of the studies examines general issues (history of interpretation, textual transmission, intertextuality, theological themes, archaeology), the second half treats literary, narrative and exegetical approaches to particular texts of the Fourth Gospel. We augur that this rich collection will help to stimulate further discussion and reflection on the Gospel of John, as well as constitute an incentive to an already distinguished scholar to continue writing challenging and thought-provoking essays and books. (from the Foreword by the Editor)
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