Deccan traps and other plateau basalts
نویسندگان
چکیده
منابع مشابه
Low temperature aqueous alteration of basalt: Mineral assemblages of Deccan basalts and implications for Mars
[1] Al-rich phyllosilicates (kaolinite, montmorillonite) have been found in layers overlying Fe/Mg-smectites on Mars, and it has been suggested that this stratigraphy formed through in situ leaching at the surface, similar to terrestrial weathering profiles. We are investigating the remotely sensed signatures of this type of weathering using ten samples from a vertical section of altered Deccan...
متن کاملTrace element and isotopic evidence for Archean basement in the Lonar crater impact breccia, Deccan Volcanic Province
The Lonar impact crater in the Deccan Traps of the Indian peninsula provides unique opportunities to study physical and chemical processes of impact cratering on basaltic targets, because terrestrial impact craters on basalts are extremely rare. Such studies are needed for determining provenance and other parameters of the excavated rocks and the cratering phenomenon that may have implications ...
متن کاملRapid eruption of the siberian traps flood basalts at the permo-triassic boundary.
The Siberian Traps represent one of the most voluminous flood basalt provinces on Earth. Laser-heating (40)Ar/(39)Ar data indicate that the bulk of these basalts was erupted over an extremely short time interval (900,000 +/- 800,000 years) beginning at about 248 million years ago at mean eruption rates of greater than 1.3 cubic kilometers per year. Such rates are consistent with a mantle plume ...
متن کاملA combined Y/Ho, high field strength element (HFSE) and Nd isotope perspective on basalt weathering, Deccan Traps, India
a r t i c l e i n f o chemostratigraphy of two contrasting Deccan Traps weathering profiles – an ancient, deeply weathered laterite, and a younger (Quaternary), more moderately weathered saprolite – are used to reconstruct different aspects of basalt weathering. Precision of the HFSE analyses is demonstrated through a report of the long-term concentrations and ratios determined in United States...
متن کاملEvidence for a chondritic impactor, evaporation-condensation effects and melting of the Precambrian basement beneath the †̃targetâ€TM Deccan basalts at Lonar crater, India
The 1.88 km diameter Lonar impact crater formed 570 ka ago and is an almost circular depression hosted entirely in the Poladpur suite of the 65 Ma old basalts of the Deccan Traps. To understand the effects of impact cratering on basaltic targets, commonly found on the surfaces of inner Solar System planetary bodies, major and trace element concentrations as well as Nd and Sr isotopic compositio...
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 of America Bulletin
سال: 1922
ISSN: 0016-7606,1943-2674
DOI: 10.1130/gsab-33-765