Dear Nathan and others,
Looking at his past postings I thought Ethan Sudman is a high School
student with childish interest in this discussion list. The link
suggested by Nathan has exposed the real reasons behind his interest. He
believes and propagates Creationism. Ethan, grow up. Remember that science
looks for rational and logical answers for questions on how the nature
works and attempts to harness this knowledge to use.
Pranesh, I think you are looking at two aspects collectively :1. Ductile
shear zones hosting U-mineralisation 2. Ductile shear zones which are
terrane boundaries. Howell's book (HOWELL, D.G.1995. Principles of Terrane
analysis: New Applications for Global Tectonics. Chapman and Hall, London.
245p.)would be ideal initial reading material for the second part. I do not
have any immediate suggestion for the first part. The recent reviews on
Singhbhum shear zone of India would give you leads.
regards and best wishes for your research,
M.K. Devarajan
Seismotectonics Division,
Geological Survey of India, Nagpur India
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---------------------------------------------Reply
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----- Original Message -----
From: Nathan Kuhle <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, May 27, 2001 10:48 PM
Subject: Re: Plate tectonics
> Dear Pranesh Sengupta,
>
> Just a quick note. Ethan J Sudman is a 15 year old amateur C++ Computer
> Programmer, not a professor. Based on the discussion located at the
> following web site, I would guess that there is an ulterior motive behind
> his interest in tectonics (Amazing what a quick search on Google will turn
> up).
> http://www.scientificcreationism.org/wwwboard.html
>
> The irony here is that his suggestion is indeed a great one. As I have no
> knowledge about the case you brought up, I can not offer any comments, but
> my hope is that the question you posed brings forth ideas, comments and
> more discussion from the entire group on leading-edge questions that we
are
> all dealing with.
>
> Regards,
> Nathan Kuhle
>
>
> At 10:20 PM 5/27/01 +0900, you wrote:
> >
> >
> >
> >
> >Respected Prof. Sudman and other members, Mesoproterozoic
> >thermotectonic event and related magmatism welded lowgrade
> >Proterozoic/Archaean terrane with high grade Archaean/Proterozoic. And in
> >many cases the boundary is marked by shear zone. From some litterature I
> >found that in some of these shear zones we have large deposits of
> >radioactive minerals e.g. Uranium. The possible source of this U may be
the
> >syntectonically emplaced granite or earlier country rocks from which U
was
> >mobilised and concentrated in this zone. Which of these two models or any
> >other model(s) was (were) responsible for any particular area is not yet
> >clearly constrained. So I would like to draw your attention on this
> >matter and seek some reference related to this. I would also like to have
> >some suggestions to solve such problems. Although it is not true for all
> >the cases but if we can search for Mesoproterozoic Shear Zone controlled
> >Uranium or other similar radioactive mineral deposits then we can perhaps
> >get the then plate boundaries. With best of regards, Pranesh
Sengupta,
> > India.
> >Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
> >
>
>
>
>
> Nathan J. Kuhle
> Texas A&M University
> Dept. of Geology and Geophysics
> College Station, TX 77843-3115
> e-mail: [log in to unmask]
> office phone: 979-845-3407
> home phone: 979-696-7036
>
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