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(PDF) Comparison of Strontium and Neodymium Isotopes in

The source material for Australasian tektites (AAT) may be wholly, or partly, a recent sedimentary rock as indicated by 10Be content [1,2]. Sr-Nd values of AAT can be compared with recent fluvial and basin sediments to offer a fingerprint for the (PDF) Impact Origin of the Chesapeake Bay Structure and Impact Origin of the Chesapeake Bay Structure and the Source of the North American Tektites. Science, 1996. Dion Brandt. Wolf Reimold. C. Poag. Dion Brandt. Wolf Reimold. C. Poag. Download PDF. Download Full PDF Package. This paper. A short summary of

(PDF) Major and trace element compositions of georgiaites

Major and trace element compositions of georgiaites:Clues to the source of North American tektites. Meteoritics & Planetary Science, 2000. Marc Norman. PDF. Download Free PDF. Free PDF. Download with Google Download with Facebook. or. Create a free account to download. PDF. PDF. Age and provenance of the target materials for tektites Sm-Nd and Rb-Sr analyses of tektites and other impactites can be used to place constraints on the age and provenance of target materials which were impact melted to form these objects. Tektites have large negative e^(Nd)(0) values and are uniform within each tektite group while the e^(Sr)(0) are large positive values and show considerable variation within each group. Geochemical comparison of Australian and North American Australian tektites (australites) and North American tektites (bediasites) are broadly similar in composition, but differ widely in detail. There is no overlap in the ranges of concentration of CaO, MgO, Li, Ni and Mn and only minor overlap for Sr, Cr and Co. The average concentration of Li, Sr, Ni, Cr and Mn in australites is greater than that in bediasites by a factor of two or greater

Hunting the source of Georgia tektites

Hunting the source of Georgia tektites . Tektites are small masses of silica rich glass, generally a few inches across. formation that have survived reworking into younger materials. This leaves two obvious questions for intrepid tektite hunters. First, what rock layer was the source of North American Tektites, Science, vol. 271, p Impact Origin of the Chesapeake Bay Structure and the Mar 01, 1996 · Seismic profiles, drill core samples, and gravity data suggest that a complex impact crater 35.5 million years old and 90 kilometers in diameter is buried beneath the lower Chesapeake Bay. The breccia that fills the structure contains evidence of shock metamorphism, including impact melt breccias and multiple sets of planar deformation features (shock lamellae) in quartz and feldspar. North American tektite debris and impact ejecta from DSDP A layer of tektite glass and shock-metamorphosed grains found in an upper Eocene section of core 21 from DSDP Site 612 taken on the continental slope off New Jersey may belong to the North American tektite strewn field. In order to better define the layer, a series of samples was taken continuously

North American tektite debris and impact ejecta from DSDP

OSTI.GOV Journal Article:North American tektite debris and impact ejecta from DSDP Site 612 Title:North American tektite debris and impact ejecta from DSDP Site 612 Full Record Relationship between an iridium anomaly and the North Relationship between an iridium anomaly and the North American microtektite layer in core RC9--58 from the Caribbean Sea Search Results - "North American tektites"Search:"North American tektites" Suggested Key Words within your search. Bediasite 2 Deep Sea Drilling Project 2 IPOD 2 . Major elements 2 Metals 2 North American tektites 2 . more Spectra 2 Strewn fields 2

Tektites:Size estimates of their source craters and

It follows that if the Ivory Coast tektites came from the 10.5-km-wide Bosumtwi crater, the larger masses in the Australasian and North American strewnfields came from craters 17 km in diameter and between 33 and 65 km in diameter, respectively. No crater has yet been proven to be the parent of the Australisian tektites."Source Materials for North American Tektites" by Russel L Recommended Citation. R.L. Palma, M.N. Rao and M.W. Rowe, 1995. Source Materials for North American Tektites. 26th Lunar and Planetary Science Conference, Abstract