British scientists try to find Antarctica's "missing meteorites" 30NOV2019

 British scientists try to find Antarctica's "missing meteorites"

Antarctica: Metal meteorite quest set to get under way

By Jonathan Amos, BBC Science, November 29,  2019

https://www.bbc.com/news/science-environment-50549855

The Mystery of Antarctica’s Missing Meteorites

Hiding deep under the ice, iron meteorites could hold

clues to the solar system’s past., The Atlantic

https://www.theatlantic.com/science/archive/2019/02/hunting-for-antarcticas-lost-meteorites/583564/

An off-topic, but still interesting article is:

Scientists Recreated Volcanic Lightning by Blasting Ash Out of a Cannon

Robin George Andrews, Gizmodo, November 29,  2019

https://gizmodo.com/scientists-recreated-volcanic-lightning-by-blasting-ash-1840068684

Yours,

Paul H.

Does Antarctica Have A Hidden Layer Of Iron Meteorites Below Its Surface?

Does Antarctica Have A Hidden Layer Of Iron Meteorites Below Its Surface?

Does Antarctica Have A Hidden Layer Of Meteorites Below
Its Surface? Universe Today
http://www.universetoday.com/127492/does-antarctica-have-a-hidden-layer-of-meteorites-below-its-surface/

Iron meteorites 'buried in Antarctica' by the Sun, BBC News
http://www.bbc.com/news/science-environment-35587680

UCC graduate solves meteorite mystery that puzzled
scientists for decades by Olivia Kelleher, March 10, 2016
http://www.irishexaminer.com/ireland/video-ucc-graduate-solves-meteorite-mystery-that-puzzled-scientists-for-decades-386463.html

"A former physics graduate from UCC has solved a mystery
that has puzzled planetary scientists and Antarctic explorers
for decades."

The paper is:

Evatt, G. W., M. J. Coughlan, K. H. Joy, A. R. D. Smedley, P. J.
Connolly, and I. D. Abrahams, 2016 A potential hidden layer
of meteorites below the ice surface of Antarctica. Nature
Communications 7, Article number: 10679 doi:10.1038/ncomms10679
http://www.nature.com/ncomms/2016/160216/ncomms10679/full/ncomms10679.html

Yours,

Paul H.

Kimberlites Discovered in Antarctica

Kimberlites Discovered in Antarctica

First 'bona fide' diamond-bearing rock discovery
made in Antarctica, Wired.co.uk, December 18, 2013
http://www.wired.co.uk/news/archive/2013-12/18/antarctic-diamonds

Antarctica May Have a New Type of Ice: Diamonds
Scientific America (Reuters) December 17, 2103
http://www.scientificamerican.com/article.cfm?id=antarctica-may-have-a-new-type-of-diamond

Antarctica's Icy Mountains May Be Harboring
Diamonds, University Herald, December 17, 2013
http://www.universityherald.com/articles/6270/20131217/antarcticas-ice-may-be-harboring-diamonds.htm

The paperis:

Yaxley, G. M., V. S. Kamenetsky, G. T. Nichols,
R. Maas, E. Belousova, A. Rosenthal, and M.
Norman, 2013, The discovery of kimberlites in
Antarctica extends the vast Gondwanan Cretaceous
province. Nature Communications. vol. 4, article
no. 2921, http://dx.doi.org/10.1038/ncomms3921

Yours,

Paul H.

--

Asteroid Impacts in Antarctica? - Testing The Hypothesis

In "Asteroid Impacts in Antarctica?" 
http://six.pairlist.net/pipermail/meteorite-list/2011-April/076119.html
Ron wrote:

" http://www.cosmosmagazine.com/features/online/4267/asteroid-impacts-antarctica 

Asteroid impacts in Antarctica 
by Richard A. Lovett 
COSMOS Magazine 
28 April 2011"

In the article, it is written,

"When did the impact occur? "That's a tricky question," 
Weihaupt says. A definitive answer would require 
drilling all the way through the ice to the underlying 
rocks."

For the sub-ice anomalies, there is a somewhat less 
expensive preliminary step that can be taken towards 
testing this hypothesis. Because the Antarctic ice sheet has 
been eroding the location of the hypothetical impact craters 
for a considerable period of time, a significant amount of 
material forming them should have been eroded, entrained, 
carried "down glacier," and deposited either in glacial 
moraines or as dropstones on the sea floor. Given that the 
flow patterns of the ice sheets are now very well known, it 
would quite easy to predict where material eroded from 
these hypothetical impact craters would have eventually 
been deposited either in subaerial glacial moraines or as 
dropstones on the ocean floor and where to go looking for 
them. This approach for invetsigating the geology of parts
of Antarctica buried by ice sheets is discussed in detail in 
"Chapter 11 Geology of Ice-Catchment Provinces in Relation 
to Petrography and Mineralogy of Bottom Sediments 
Possible Reconstructions of Geological Composition of 
Ice-Hidden land" of:

Lisitzin, A. P., 2002, Sea-Ice and Iceberg Sedimentation in 
the Ocean: Past and Present. Springer-Verlag, New York, 
ISBN 3-540-67965-0

The paper discussed in the Cosmos article is:

Weihaupt, J. G., A. Rice, and F. G. Van der Hoeven, 2010,
Gravity anomalies of the Antarctic lithosphere. Lithosphere.
vol. 2, no. 6, pp. 454-461; DOI: 10.1130/L116.1
http://lithosphere.geoscienceworld.org/cgi/content/abstract/2/6/454
http://lithosphere.geoscienceworld.org/content/vol2/issue6/
http://lithosphere.gsapubs.org/content/2/6/454.abstract?sid=090

Yours,

Paul H.

Clue to Antarctica Space Blast Thursday, March 4, 2010

Clue to Antarctica Space Blast

Thursday, March 4, 2010 12:57 PM

Greg wrote:

“Interesting

http://news.bbc.co.uk/2/hi/science/nature/8547534.stm

Clues to Antarctica space blast By Paul Rincon
Science reporter, BBC News, The Woodlands, Texas”

The paper is:

Engrand, C. B. Narcisi, J. r. Petit, E. Dobrica, and J. Duprat,
2010, Isotopes of EPICA — Dome C Extraterrestrial Dust Layers:
Constraints on the Nature of the Impactors. 41st Lunar and
Planetary Science Conference, held March 1-5, 2010 in The
Woodlands, Texas. LPI Contribution No. 1533, p.1981

http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1981.pdf

http://adsabs.harvard.edu/abs/2010LPI....41.1981E

Related papers are:

1. Misawa, K., M. Kohno, T. Tomiyama, T. Noguchi, T.
Nakamura, K. Nagao, T.Mikouchi, and K. Nishiizumi, 2010,
Two extraterrestrial dust horizons found in the Dome Fuji
ice core, East Antarctica. Earth and Planetary Science Letters.
vol. 289, no. 1-2, pp. 287-297.

http://dx.doi.org/10.1016/j.epsl.2009.11.016

http://www.ssl.berkeley.edu/cosmochem/publications.html

The PDF for the above paper can be downloaded from
the link for this paper at:

http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235801%232010%23997109998%231578540%23FLA%23&_cdi=5801&_pubType=J&view=c&_auth=y&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=0377f75ed4c6eabaca0119b87f30f76c

2. Narcisi, B., J. Robert Petit, and B. Delmonte, nd, Extended
East Antarctic ice-core tephrostratigraphy Quaternary Science
Reviews, Article in Press, Corrected Proof

http://dx.doi.org/10.1016/j.quascirev.2009.07.009

3. Narcisi, B., J. R. Petit, and C. Engrand, 2007, First discovery
of meteoritic events in deep Antarctic (EPICA-Dome C) ice cores.
de la Recherche Scientifique & Université Paris Sud, Orsay, France)
Geophysical Research Letters. vol. 34, no. 15, CiteID L1550

http://adsabs.harvard.edu/abs/2007GeoRL..3415502N

http://www.agu.org/pubs/crossref/2007/2007GL030801.shtml

A summary paper about the ice cores:

Wolff, E. W., C. Barbante. S. Becagli, and many, many others,
2010, Changes in environment over the last 800,000 years from
chemical analysis. Quaternary Science Reviews. vol. 29,
pp. 285–295.

http://www.climate.unibe.ch/~stocker/papers/wolff10qsr.pdf

http://www.climate.unibe.ch/~stocker/publications10.html

Yours,

Paul H.

Clue to Antarctica Space Blast

Paul Heinrich
Wed Mar 3 22:57:21 EST 2010

Greg wrote:

“Interesting

http://news.bbc.co.uk/2/hi/science/nature/8547534.stm

Clues to Antarctica space blast By Paul Rincon
Science reporter, BBC News, The Woodlands, Texas”

The paper is:

Engrand, C. B. Narcisi, J. r. Petit, E. Dobrica, and J. Duprat,
2010, Isotopes of EPICA — Dome C Extraterrestrial Dust Layers:
Constraints on the Nature of the Impactors. 41st Lunar and
Planetary Science Conference, held March 1-5, 2010 in The
Woodlands, Texas. LPI Contribution No. 1533, p.1981

http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1981.pdf
http://adsabs.harvard.edu/abs/2010LPI....41.1981E

Related papers are:

1. Misawa, K., M. Kohno, T. Tomiyama, T. Noguchi, T.
Nakamura, K. Nagao, T. Mikouchi, and K. Nishiizumi, 2010,
Two extraterrestrial dust horizons found in the Dome Fuji
ice core, East Antarctica. Earth and Planetary Science Letters.
vol. 289, no. 1-2, pp. 287-297.

http://dx.doi.org/10.1016/j.epsl.2009.11.016
http://www.ssl.berkeley.edu/cosmochem/publications.html

The PDF for the above paper can be downloaded from
the link for this paper at:

http://www.sciencedirect.com/science?_ob=PublicationURL&_tockey=%23TOC%235801%232010%23997109998%231578540%23FLA%23&_cdi=5801&_pubType=J&view=c&_auth=y&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=0377f75ed4c6eabaca0119b87f30f76c

2. Narcisi, B., J. Robert Petit, and B. Delmonte, nd, Extended
East Antarctic ice-core tephrostratigraphy Quaternary Science
Reviews, Article in Press, Corrected Proof

http://dx.doi.org/10.1016/j.quascirev.2009.07.009

3. Narcisi, B., J. R. Petit, and C. Engrand, 2007, First discovery
of meteoritic events in deep Antarctic (EPICA-Dome C) ice cores.
de la Recherche Scientifique & Université Paris Sud, Orsay, France)
Geophysical Research Letters. vol. 34, no. 15, CiteID L1550

http://adsabs.harvard.edu/abs/2007GeoRL..3415502N
http://www.agu.org/pubs/crossref/2007/2007GL030801.shtml

A summary paper about the icecores:

Wolff, E. W., C. Barbante. S. Becagli, and many, many others,
2010, Changes in environment over the last 800,000 years from
chemical analysis. Quaternary Science Reviews. vol. 29,
pp. 285–295.

http://www.climate.unibe.ch/~stocker/papers/wolff10qsr.pdf
http://www.climate.unibe.ch/~stocker/publications10.html

Yours,

Paul H.

Two extraterrestrial dust horizons found in the Dome Fuji ice core

Paul Heinrich
Sun Jan 3 20:31:38 EST 2010

Misawa, K., M. Kohno, T. Tomiyama, T. Noguchi, T. Nakamura,
K. Nagao, T.Mikouchi, and K. Nishiizumi, 2010, Two extraterrestrial
dust horizons found in the Dome Fuji ice core, East Antarctica. Earth
and Planetary Science Letters. vol. 289, no. 1-2, pp. 287-297.

http://dx.doi.org/10.1016/j.epsl.2009.11.016

In part the abstract reads,

"Two silicate-rich dust layers were found in the Dome Fuji ice core
in East Antarctica, at Marine Isotope Stages 12 and 13. Morphologies,
textures, and chemical compositions of constituent particles reveal
that they are high-temperature melting products and are of
extraterrestrial origin. Because similar layers were found approximately
2000 km east of Dome Fuji, at EPICA (European Project for Ice
Coring in Antarctica)-Dome C, particles must have rained down
over a wide area 434 and 481 ka."

Mention is also made of these dust horizons in:

Narcisi, B., J. Robert Petit, and B. Delmonte, nd, Quaternary Science
Reviews, Article in Press, Corrected Proof

http://dx.doi.org/10.1016/j.quascirev.2009.07.009

A related paper that is available online as a PDF fils is:

Duprat , J., C. Engrand , M. Maurette , G. Kurat , M. Gounelle ,
and C. Hammer, 2007, Micrometeorites from Central Antarctic snow:
The CONCORDIA collection. Advances in Space Research. vol. 39,
pp. 605–611.

Abstract at http://dx.doi.org/10.1016/j.asr.2006.05.029

PDF file at:

http://www2.mnhn.fr/hdt205/leme/doc/2007%20Duprat%20et%20al.%20ASR.pdf

Yours,

Paul H.

Free PDF File of Paper About Proposed Wilkes Land, Antarctica, Impact Crater

Paul bristolia at yahoo.com
Wed Aug 5 08:34:19 EDT 2009

Dear friends,

In a previous message I wrote:

"I came across a new paper about the proposed 300 km
in diameter impact crater in Wilkes Land, Antarctica. It is:

von Frese, R. R. B., L. V. Potts, S. B. Wells, T. E. Leftwich, H. R. Kim, J. W.
Kim, A. V. Golynsky, O. Hernandez, and L. R. Gaya-Piqué (2009), GRACE
gravity evidence for an impact basin in Wilkes Land, Antarctica, Geochemistry
Geophysics Geosystems, 10, Q02014, doi:10.1029/2008GC002149.

http://www.agu.org/pubs/crossref/2009/2008GC002149.shtml "

While doing additional googling, I came across an URL where the PDF
file for this paper can be found. The PDF file for this paper can be
downloaded for free from:

http://www.geology.osu.edu/~vonfrese/general/WLIB_gcubed09.pdf

Yours,

Paul H.

Microtektites and Micrometeorites in Antarctica

Paul bristolia at yahoo.com
Tue Nov 18 16:10:42 EST 2008

Some new papers about microtektites and micrometeorites
in Antarctica are:

Rochettea, P., L. Folcob, C. Suaveta, M. van Ginnekenb,
J. Gattaccecaa, N. Perchiazzic, R. Brauchera, and R. P.
Harveyd, 2008, Micrometeorites from the Transantarctic
Mountains. Proceedings of the National Academy of
Sciences. Published online before print November 14,
2008, doi: 10.1073/pnas.0806049105

http://www.pnas.org/content/early/2008/11/14/0806049105.abstract
http://www.pnas.org/content/early/2008/11/14/0806049105.full.pdf+html

+++++

Folco, L., P. Rochette, N. Perchiazzi, M. D'Orazio, M.A.
Laurenzi, and M. Tiepolo, 2008a, Microtektites from
Victoria Land Transantarctic Mountains. Geology. vol. 36,
no. 4, pp. 291-294, DOI: 10.1130/G24528A.1

http://geology.geoscienceworld.org/cgi/content/abstract/36/4/291

+++++

Folco, L., P. Rochette, N. Perchiazzi, M. D'Orazio, M.A.
Laurenzi, and M. Tiepolo, 2008, Microtektites from the
Northern Victoria Land Transantarctic Mountains: An
Update. 39th Lunar and Planetary Science Conference,
(Lunar and Planetary Science XXXIX), held March
10-14, 2008 in League City, Texas. LPI Contribution
No. 1391., p.1180

http://adsabs.harvard.edu/abs/2008LPI....39.1180F
http://www.lpi.usra.edu/meetings/lpsc2008/pdf/1180.pdf

Yours,

Paul H.

Re: Does a Giant Crater Lie Beneach the Antarctic Ice?

Paul bristolia at yahoo.com
Tue Jun 6 13:08:13 EDT 2006

On June 4, 2006, Ron Baalke quoted

“http://www.nature.com/news/2006/060529/full/060529-11.html

Does a giant crater lie beneath the Antarctic ice?
Signs of an ancient impact could help to explain a mass
extinction. by Mark Peplow, nature.com,June 2, 2006"

In part, the article stated:

“An impact of that size should also have melted and
twisted nearby rock. Yet rocks in the Transantarctic
Mountains of the same age show no evidence of the
collision, says Jane Francis, a geologist also at the
University of Leeds. "That sequence has been worked
on before, and no one has found evidence to support
a massive impact like this," she says.”

This is an excellent point as there are complete stratigraphic
sections across the Permian-Triassic boundary exposed in
the Transantarctic Mountains and undisputed impact ejecta
and other evidence of a nearby impact of such a size is
completely lacking. The reports of shocked quartz from
these outcrops have been retracted and the reports of helium-
filled fullerenes, meteorite fragments, and other impact-
related debris are highly disputed. A full description of the
Permian-Triassic boundary and a discussion of the impact
ejecta reported from it can be found in:

Collinson, J. W., Hammer, W. R., Askin, R. A., and Elliot,
D. E., 2006, Permian-Triassic boundary in the central
Transantarctic Mountains, Antarctica. Geological Society
of America Bulletin. vol. 118, no. 5, pp. 747–763.
doi: 10.1130/B25739.1

http://www.gsajournals.org/gsaonline/?request=get-abstract&doi=10.1130%2FB25739.1

Yours,

Paul

Re: Large Impact Crater Off the Coast of Antarctica

Paul bristolia at yahoo.com
Fri Mar 17 17:05:41 EST 2006

Ron Baalke wrote:

"http://news.bbc.co.uk/1/hi/sci/tech/4816794.stm
Space impact clue in Antarctica By Paul Rincon
BBC News, March 17, 2006"

A couple of relevant published papers are:

Published papers on this alleged crater are:

Hrjanina, L. P., 1998, Once Again about Kainozoic Meteorite Structures
in the Ross Sea, Antarctica. Lunar and Planetary Science XXIX,
http://www.lpi.usra.edu/meetings/LPSC98/pdf/1152.pdf

Gerard-Little, P., D. Abbott, D. Breger, and L. Burckle, 2006, Evidence
for a Possible Late Pliocene Impact in the Ross Sea, Antarctica. Lunar
and Planetary Science XXXVII.
http://www.lpi.usra.edu/meetings/lpsc2006/pdf/1399.pdf

Another paper is:

Khryanina, L. P.,1985, Possible meteorite impact structures in the
Ross Sea, Antarctica. International Geology Review. vol. 27, no. 10,
pp.1207-1211.

Yours,

Paul