Hadean Earth
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Hadean Earth
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Author : T. Mark Harrison
language : en
Publisher: Springer Nature
Release Date : 2020-06-18
Hadean Earth written by T. Mark Harrison and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-06-18 with Science categories.
This book consolidates the latest research on the Hadean Eon - the first 500 million years of Earth history - which has permitted hypotheses of early Earth evolution to be tested, including geophysical models that include the possibility of plate tectonic-like behavior. These new observations challenge the longstanding Hadean paradigm – based on no observational evidence - of a desiccated, lifeless, continent-free wasteland in which surface petrogenesis was largely due to extraterrestrial impacts. The eon was termed “Hadean” to reflect such a hellish environment. That view began to be challenged in 2001 as results of geochemical analyses of greater than 4 billion year old zircons from Australia emerged. These data were consistent with the zircons forming in a world much more similar to today than long thought and interpreted to indicate that sediment cycling was occurring in the presence of liquid water. This new view leaves open the possibility that life could have emerged shortly after Earth accretion. The epistemic limitations under which the old paradigm persisted are closely examined. The book is principally designed as a monograph but has the potential to be used as a text for advanced graduate courses on early Earth evolution.
Insights Into The Hadean Earth From Zircon Experimental Studies
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Author : Dustin Trail
language : en
Publisher:
Release Date : 2010
Insights Into The Hadean Earth From Zircon Experimental Studies written by Dustin Trail and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.
Earth
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Author : Jonathan I. Lunine
language : en
Publisher: Cambridge University Press
Release Date : 2013-04-08
Earth written by Jonathan I. Lunine and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-08 with Science categories.
Fully updated, this new edition provides a uniquely interdisciplinary overview of Earth's history and evolution for Earth science undergraduates.
Processes On The Early Earth
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Author : W. U. Reimold
language : en
Publisher: Geological Society of America
Release Date : 2006-01-01
Processes On The Early Earth written by W. U. Reimold and has been published by Geological Society of America this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-01-01 with Science categories.
"This Special Paper presents a collection of 19 papers contributed to a joint Field Forum organized by the Geological Society of America and the Geological Society of South Africa in July 2004 in the Barberton Greenstone Belt and the Vredefort Dome, South Africa. The papers cover a wide variety of themes, including Archean and Proterozoic crust formation and geodynamics (with an appraisal of evidence of Archean subduction processes); the significance of impacts in the evolution of the early Earth's crust; traces of early life in Archean environments of Australia and South Africa and related studies of depositional environments; and processes affecting the giant Witwatersrand gold deposit."--Publisher's website.
Planetary Conditions At The Hadean And Archean Transition
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Author : Julio Valdivia-Silva
language : en
Publisher: Nova Science Publishers
Release Date : 2011
Planetary Conditions At The Hadean And Archean Transition written by Julio Valdivia-Silva and has been published by Nova Science Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Earth categories.
Earth's primordial conditions at the beginning of geologic history (Hadean Eon) witnessed several fundamental processes, including cooling and crystallisation of a magma ocean, the Moon-formation impact event, the faint young sun paradox, the late heavy bombardment (LHB), origin of pre-biotic molecules and probably life itself, as well as the transition from reduced to oxidised outer Earth's layers. This book assesses and analyses the latest information about the primitive Earth's environments in the Hadean to Archean transition, including the faint young sun paradox, possible reservoirs of pre-biotic molecules, early carbon cycle and the most favourable niches for the emergence of life.
Theory Of The Earth
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Author : Thomas Nail
language : en
Publisher: Stanford University Press
Release Date : 2021-04-27
Theory Of The Earth written by Thomas Nail and has been published by Stanford University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-04-27 with Philosophy categories.
We need a new philosophy of the earth. Geological time used to refer to slow and gradual processes, but today we are watching land sink into the sea and forests transform into deserts. We can even see the creation of new geological strata made of plastic, chicken bones, and other waste that could remain in the fossil record for millennia or longer. Crafting a philosophy of geology that rewrites natural and human history from the broader perspective of movement, Thomas Nail provides a new materialist, kinetic ethics of the earth that speaks to this moment. Climate change and other ecological disruptions challenge us to reconsider the deep history of minerals, atmosphere, plants, and animals and to take a more process-oriented perspective that sees humanity as part of the larger cosmic and terrestrial drama of mobility and flow. Building on his earlier work on the philosophy of movement, Nail argues that we should shift our biocentric emphasis from conservation to expenditure, flux, and planetary diversity. Theory of the Earth urges us to rethink our ethical relationship to one another, the planet, and the cosmos at large.
A Tale Of Two Earths Reconciling The Lunar And Terrestrial Hadean Records
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Author : Patrick Boehnke
language : en
Publisher:
Release Date : 2016
A Tale Of Two Earths Reconciling The Lunar And Terrestrial Hadean Records written by Patrick Boehnke and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
Studying early Earth history is complicated by the fact that the rock record doesn't extend past 4 Ga and our only record for the Hadean (>4 Ga) comes to us from detrital zircons from the Jack Hills in Western Australia. The Hadean zircon record extends back to almost 4.4 Ga and has revealed that the early Earth may have had liquid water, a felsic crust, plate boundary interactions, and possibly a biosphere. On the other hand, analyses of lunar and meteoritic samples are used to argue for a hellish Hadean Earth where frequent, large impactors repeatedly destroyed the crust. Indeed, these two models stand in direct contradiction. The focus of this thesis is to examine the evidence for these two models and ultimately propose a reconciliation based on a new interpretation of the chronology of the lunar samples used to constrain the impact history into the early Earth-Moon system. In order to improve the understanding of zircon crystallization in igneous settings, we undertook experimental studies of zircon saturation which were analyzed using a novel ion imaging approach by a secondary ion mass spectrometer. This study confirmed the original model for zircon saturation, that it is a function of only temperature, melt composition, and Zr content. Indeed, the primary implication for the early Earth from this work is that zircons are much more likely to crystallize in a felsic rather than mafic magma and therefore simply the existence of Hadean zircons suggests a high likelihood for felsic Hadean magmatism. The majority of the thesis focuses on the interpretation of 40Ar/39Ar ages of lunar and meteorite samples, specifically with regards to impact histories derived from compilations of such ages. The primary complication with lunar and meteorite 40Ar/39Ar ages is that the vast majority show evidence for later disturbances due to diffusive loss of 40Ar. To try and extract meaningful thermal histories from these samples, we undertook investigations of samples from Apollo 16 and the Jilin chondrite. We then used an extension of the multi-domain diffusion model that can model samples containing multiple activation energies (i.e., whole rock samples with multiple K bearing minerals) to propose that the 40Ar/39Ar system can be used to recover shock heating temperatures and durations. Having shown the effects of diffusive 40Ar loss on the accuracy of 40Ar/39Ar dating, we then explored the question as to whether or not compilations of disturbed 40Ar/39Ar ages simply misestimate the timing of bombardment episodes or are fundamentally inaccurate. For this we created a simple numerical model that simulates a chosen impact history on a surface and then creates a histogram of 40Ar/39Ar plateau ages. Our results show that rather than simply misestimate timing, compilations of 40Ar/39Ar ages can lead to inferences of illusory bombardment episodes. Finally, we examine the 40Ar/39Ar ages of suite of geochemically related Apollo 16 rocks to examine the effects of mixing and brecciation on the accuracy of inferred ages. By analyzing multiple rocks from each soil sample, we show that three out of six samples are not compatible with a single thermal history. That is to say, despite their close proximity during sampling and geochemical similarities, analyzed rocks in the soil sample have unique chronologies. Based on these findings, we developed a simple numerical model which shows that internal isochrons of mixed samples can yield erroneous ages while retaining a statistically acceptable mean squared weighted deviation (MSWD).
Earth S Oldest Rocks
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Author : Martin J. Van Kranendonk
language : en
Publisher: Elsevier
Release Date : 2007-10-26
Earth S Oldest Rocks written by Martin J. Van Kranendonk and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-10-26 with Science categories.
Earth’s Oldest Rocks provides a comprehensive overview of all aspects of early Earth, from planetary accretion through to development of protocratons with depleted lithospheric keels by c. 3.2 Ga, in a series of papers written by over 50 of the world's leading experts. The book is divided into two chapters on early Earth history, ten chapters on the geology of specific cratons, and two chapters on early Earth analogues and the tectonic framework of early Earth. Individual contributions address topics that range from planetary accretion, a review of Earth meteorites, significance and composition of Hadean protocrust, composition of Archaean mantle and deep crust, all aspects of the geology of Paleoarchean cratons, composition of Archean oceans and hydrothermal environments, evidence and geological settings of early life, early Earth analogues from Venus and New Zealand, and a tectonic framework for early Earth. * Contains comprehensive reviews of areas of ancient lithosphere on Earth, of planetary accretion processes, and of meteorites* Focuses on specific aspects of early Earth, including oldest putative life forms, evidence of the composition of the ancient atmosphere-hydrosphere, and the oldest evidence for subduction-accretion* Presents an overview of geological processes and model of the tectonic framework on early Earth
Origin And Evolution Of Earth
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Author : National Research Council
language : en
Publisher: National Academies Press
Release Date : 2008-08-04
Origin And Evolution Of Earth written by National Research Council and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-08-04 with Science categories.
Questions about the origin and nature of Earth and the life on it have long preoccupied human thought and the scientific endeavor. Deciphering the planet's history and processes could improve the ability to predict catastrophes like earthquakes and volcanic eruptions, to manage Earth's resources, and to anticipate changes in climate and geologic processes. At the request of the U.S. Department of Energy, National Aeronautics and Space Administration, National Science Foundation, and U.S. Geological Survey, the National Research Council assembled a committee to propose and explore grand questions in geological and planetary science. This book captures, in a series of questions, the essential scientific challenges that constitute the frontier of Earth science at the start of the 21st century.
Earth History
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Author : Azhar ul Haque Sario
language : en
Publisher: tredition
Release Date : 2024-06-07
Earth History written by Azhar ul Haque Sario and has been published by tredition this book supported file pdf, txt, epub, kindle and other format this book has been release on 2024-06-07 with History categories.
Think of Earth as a timeworn scrapbook, filled with faded photos, scribbled notes, and the occasional pressed flower. Sure, it's one speck amidst the galaxy, but every dog-eared page holds a tale more thrilling than any sci-fi movie. "Earth History: Our Legacy" is your ticket to flipping through those pages, starting with a fiery explosion that sparked our world into being and ending... well, that ending is still up to us! This isn't some dry textbook. It's a backstage pass to Earth's greatest hits and flops. Picture yourself stargazing with scientists, searching for planets like ours before diving into the lava pits of a young Earth. You'll hang out underwater, watching life take its first, weird steps, then stand on the sidelines as dinosaurs duke it out while sneaky mammals play it cool. And hey, we humans show up eventually! You'll see how campfire sparks turned into city lights, how scattered tribes became empires that crumbled back into dust. There's adventure, mystery, and a dash of 'are we seriously repeating the same mistakes?' The thing is, Earth's story is our story. Its scars from past disasters hold warnings. Its bursts of wild creativity hold the key to solving today's problems. Our ancestors were survivors, inventors, and dreamers – kinda like us. "Earth History: Our Legacy" isn't just about the past; it's about right now. It's about realizing that this incredible, messy, breathtaking world is in our hands, and the next chapter is for us to write. Ready to turn the page? Let's dive in!