Results 101 to 110 of about 784,658 (343)
Episodic Lithospheric Deformation in Eastern Tibet Inferred From Seismic Anisotropy
Geophysical Research Letters, 2020 Mechanisms for uplift and deformation of the Tibetan Plateau remain vigorously debated; hypotheses include stepwise growth, distributed thickening, and crustal channel flow, each with a distinct anisotropic signature.
Xuewei Bao +4 more
doaj +1 more source
A study of ignimbrites in the Cordilleran region as a basis for interpretation of lunar plains [PDF]
Progress in a study of lunar topography and geology by analyzing and mapping the earth's mantle is presented. Data from the study are used for the construction of a 600 page lunar topographic atlas.
Clabaugh, S. E.
core +1 more source
, 2015 We comprehensively compile and review N content in geologic materials to calculate a new N budget for Earth. Using analyses of rocks and minerals in conjunction with N-Ar geochemistry demonstrates that the Bulk Silicate Earth (BSE) contains \sim7\pm4 ...
Goldblatt, Colin, Johnson, Ben
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Extreme 18O-enrichment in majorite constrains a crustal origin of transition zone diamonds [PDF]
, 2015 The fate of subducted oceanic lithosphere and its role in the planet-scale geochemical cycle is a key problem in solid Earth studies. Asthenospheric and transition zone minerals included in diamond have been interpreted as representing subducted oceanic ...
Harris, J. W. +3 more
core +1 more source
Journal of Metamorphic Geology, EarlyView.ABSTRACT To gain insights into the pressure–temperature evolution of a scarcely studied portion of the Variscan basement of Corsica in southern Europe, we combined phase equilibrium modelling, Zr‐in‐rutile thermometry and apatite‐in‐garnet elastic barometry. We investigated Grt‐St micaschist rocks containing garnet grains of several millimetres in size
Lorenzo Dulcetta +6 more
wiley +1 more source
Neogene plate tectonic reconstructions and geodynamics of North Island sedimentary basins: Implications for the petroleum systems [PDF]
, 2006 Although the modern Australia-Pacific plate boundary through New Zealand is relatively straight, there have been significant changes in its geometry during the Neogene. Within the North Island sector there has been a fundamental transition from an Alpine
Furlong, Kevin P., Kamp, Peter J.J.
core +1 more source
Recent Advances in Understanding the Geology of Diamonds
, 2013 It has been more than two decades since diamond ages have proven to be up to billions of years older than their host magmas of kimberlite or lamproite.
S. Shirey, J. Shigley
semanticscholar +1 more source
Journal of Metamorphic Geology, EarlyView.ABSTRACT The youngest known ultrahigh‐pressure (UHP) eclogite from Tumagabuna Island, a small island of the D'Entrecasteaux Islands chain in Papua New Guinea, exhibits zircon U–Pb age variations spanning a few million years. This age variation complicates the interpretation of the evolution of this high and ultrahigh‐pressure ([U]HP) terrane.
Linus B. Streicher +4 more
wiley +1 more source
The late Mesozoic-Cenozoic tectonic evolution of the South China Sea: A petrologic perspective [PDF]
, 2014 This paper presents a review of available petrological, geochonological and geochemical data for late Mesozoic to Recent igneous rocks in the South China Sea (SCS) and adjacent regions and a discussion of their petrogeneses and tectonic implications. The
Castillo, PR, Shi, X, Yan, Q
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Journal of Metamorphic Geology, EarlyView.ABSTRACT Geothermobarometry provides crucial constraints on the physical conditions of metamorphism, offering insights into petrogenetic processes and providing key information on thermal regimes and metamorphic depths to other geological disciplines.
Philip Hartmeier +2 more
wiley +1 more source