Archean granitoids of India: windows into early Earth tectonics – an introduction
نویسندگان
چکیده
منابع مشابه
Tectonics of early Earth: Some geodynamic considerations
Today, plate tectonics is the dominant tectonic style on Earth, but in a hotter Earth tectonics may have looked different due to the presence of more melting and associated compositional buoyancy as well as the presence of a weaker mantle and lithosphere. Here we review the geodynamic constraints on plate tectonics and proposed alternatives throughout Earth’s history. Observations suggest a 100...
متن کاملArchean microfossils: a reappraisal of early life on Earth.
The oldest fossils found thus far on Earth are c. 3.49- and 3.46-billion-year-old filamentous and coccoidal microbial remains in rocks of the Pilbara craton, Western Australia, and c. 3.4-billion-year-old rocks from the Barberton region, South Africa. Their biogenicity was recently questioned and they were reinterpreted as contaminants, mineral artefacts or inorganic carbon aggregates. Morpholo...
متن کاملintroduction of persian astronomy into india
the islamic astronomy including the persian astronomy was thoroughly introduced into india from the 14th century ad or so. firstly, the astrolabe was introduced at the time of f?r?z sh?h tughluk?, and a sanskrit work entitled yantra-r?ja (1370 ad) was composed by mahendra s?ri. at that time, some sanskrit astronomical (or astrological) works were also translated into persian. the astrolabe beca...
متن کاملPlate tectonics on early Earth? Weighing the paleomagnetic evidence
Paleomagnetism is the only quantitative method available to test for lateral motions by tectonic plates across the surface of ancient Earth. Here, we present several analyses of such motions using strict quality criteria from the global paleomagnetic database of pre–800 Ma rocks. Extensive surface motion of cratons can be documented confi dently to older than ca. 2775 Ma, but considering only t...
متن کاملPlanetary tectonics: introduction
The geocentric realm of tectonics changed with the dawn of robotic exploration of the other bodies of the solar system. A diverse assortment of tectonic landforms has been revealed, some familiar and some with no analogues to terrestrial structural features. In this chapter, we briefly introduce some of the major topics in the book. The chapters review what is known about the tectonics on Mercu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Geological Society, London, Special Publications
سال: 2020
ISSN: 0305-8719,2041-4927
DOI: 10.1144/sp489-2020-155