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本帖最后由 德道 于 2010-10-30 22:21 编辑 * B0 L" y) h9 ^% }
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Burmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin / b3 P* \8 O: M2 \1 A" g
State the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources
/ K& W" I' f; samber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China . 4 t- |+ v2 a! a* R4 q, Y+ }
From there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was
3 T. M+ `- @; Y |# e# Lhighly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring
0 { l4 r @- _3 m0 ^to Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two $ y' E# r% v) o' y3 |
thousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also
! {+ ?$ ~2 L0 {9 K5 k0 bused and is still used in Chinese medicine.
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The first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez
# b; T! |( I5 Z2 C: Y7 JSemedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to
! o5 }& l8 X" B% U4 Z0 Q! D1 @- T! Ered amber from Yunnan Province by Du Halde.
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/ H( S" e% ^1 wIn the 19th Century, there were a series of reports about the location and mining of Burmese amber By Brester (1835) " X a+ w/ V, |# i+ @1 y
and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng)
; t6 \: b8 a4 y% U' y* ^6 [5 mValley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow ' }# A' u6 V- \3 O
pits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the
7 s) G6 {( z" R. j# |% l“Hookhoom” Valley. Some pits, he observed were up to forth feet deep. $ D1 p6 ^6 x! O+ |
& d/ G/ }9 @* o+ d" NIn 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to
: h% t5 q0 R3 XIndia . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to
% H1 y! U* `; I# w6 b& |% j( AMandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of 0 p% n1 O/ [ o7 h- x
northern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name
3 p) D! _; L$ o0 ~6 wburmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in 2 z$ D q; [1 j( f' L
1893. , `! c) h# q, _$ {* R; r
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In the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the
1 h6 y1 n! B' E5 l( `+ fSecond World War, both the production and study languished until the 1990’s. This was due not only to the war but also ! ^7 z6 e+ z% A; ?% O
internal turmoil within Burma following its independence from Britain in 1947. % u3 f0 {! @! k) g: R
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Cockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly 9 ]0 [5 {5 M" s: ]! c v- t, E
Upper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District
0 j0 p# l+ k) s* sfrom 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the
/ Y* f v$ E9 L* m$ k0 w( j, {Hukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson
! s9 `* X& G/ W) E' L- F(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as ) D2 ?9 D) X! [8 z3 ^( ]
Baltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits. ' n8 ^! j) J$ h- q
Chibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period.
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During the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the
v' y& t9 u% j. C. nJapanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the
# t1 R8 m _7 S$ k2 V% J2 a' Aconstruction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected
, `( \& s9 E/ r8 rup with the Burma Road to China . This road provided a back door to supply China with desperately needed war % f+ B) G; K0 N% h, x8 |" Y6 D
material. ! ]" H* Z/ K* G r) ?$ x
8 U( x# f& t3 C3 v2 cSince independence, Burma has been racked by internal insurgencies including fighting between the Kachin
u1 @6 V& Y5 I5 s+ eIndependence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited ' ~) | o5 _, U
access to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese 4 n( [- E, o2 l+ C- x: n
name of the country.
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- p/ c" R% \2 p3 ^$ c; bSince the beginning of the Second World War until recently there was been a sixty year hiatus in production. Dr. David
; B! U/ e2 D5 X, e# U; rGrimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part 4 A5 Q) v, w; h# W# R$ K
because the deposits are no longer mined and the supply is generally not available.” 5 K/ o. J2 G q" [1 |) s9 n
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Leeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and
/ H$ y2 Q, b% W% p, B' }platinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold & T' W6 U! O1 t3 h& r
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening ) x) w+ i8 {4 N1 j
the amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per : G0 k2 P8 a( F% l
year. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural
/ ^0 ]! d+ b4 Q$ g+ _' W) M1 CHistory in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a u% f+ H, M8 S: z8 a# ?; g
scientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a
# A' E# N9 b5 [; {# [2 d& U/ j5 t" sscientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a ' Y5 `2 Z, s+ ~7 o
description of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous " B! Q( X8 I2 r6 B( L) T8 s
age. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from & A2 B; Q8 m ?6 p; F& e9 ]: ?0 U
which commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber.
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* P$ T1 ?7 U& G+ }% w' G4 cSince scientific study of burmite began, there have been numerous scientific papers on the unique biota found in 0 }9 L d$ J/ ~8 n+ E/ L' @) D
burmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber. 4 l2 d0 p* z, y+ k
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