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本帖最后由 德道 于 2010-10-30 22:21 编辑 * j( r' X& g0 y0 r
+ A6 Z) A- p* YBurmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin 6 C7 }$ I9 [7 g" m
State the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources
- P( t1 U* C, Q& Y& f7 s! kamber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China . " R5 v7 J9 `* ]
From there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was 5 i1 J+ m+ x2 _% \. e9 L
highly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring " p& ?* J; Y1 J: f. R; G
to Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two
& E$ B- G, e' Q! tthousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also
2 z( B1 U$ J1 _9 b/ s/ m3 Nused and is still used in Chinese medicine. 7 r% {* ? P3 H
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The first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez
{7 R! {8 C; VSemedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to 5 L/ k7 j8 [) ^ T5 c
red amber from Yunnan Province by Du Halde.
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In the 19th Century, there were a series of reports about the location and mining of Burmese amber By Brester (1835) % i, g8 ?7 T }8 H
and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng) 9 L$ }* K/ H% _, J0 \7 P; `
Valley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow $ b3 y3 |9 y9 {- F" C7 m+ @
pits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the
& V. ]& G; `- c/ C4 k: p _, L9 n“Hookhoom” Valley. Some pits, he observed were up to forth feet deep.
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In 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to
1 n% R; l, _9 N4 ]) a6 U, f/ QIndia . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to
U2 O' `# O) |6 @" n* }Mandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of 6 ^) C8 ^; ~3 P& X/ K. p
northern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name
% s' H/ X# o; W7 q0 J" i4 Iburmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in - U6 f' ~7 Q6 |6 t! D
1893. X+ |$ o9 @ x; ]! _, T1 ]
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In the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the ! r& y1 ~+ \1 e. K) G: s
Second World War, both the production and study languished until the 1990’s. This was due not only to the war but also ( F m* u% X d, [
internal turmoil within Burma following its independence from Britain in 1947. : u0 ]0 f0 [: w5 {5 x% d
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Cockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly + T% `" O P3 b1 \2 g4 `9 k4 g( J
Upper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District
: L, O3 @1 H4 l+ E7 Bfrom 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the / L, r6 ?5 Y1 i o6 d# d/ k. B
Hukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson
% ^" }5 R H: [* c- n1 y(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as , s8 R! N/ s' v# s
Baltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits. - z$ }# @! c# N: b, q6 r: o: u% v
Chibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period. 2 `0 V. D: }( ~( y
* t6 ]$ O, o2 R; ]- {During the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the
8 r2 I* y% }( EJapanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the 2 X( ^! T( p# Z6 J- l/ m& t0 k
construction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected
; v/ u# N9 V. q3 y$ Nup with the Burma Road to China . This road provided a back door to supply China with desperately needed war
4 J. V" N2 ^% h7 ~ qmaterial. 6 b# y/ ]! `* ?& K. Y) j( a
' \+ {- c' h S$ H B l9 k3 l: ySince independence, Burma has been racked by internal insurgencies including fighting between the Kachin + v+ R/ |# y1 `+ b
Independence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited
* G) h% q9 r: L, }" t# {% B5 Naccess to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese / S: @" `4 v5 D5 y
name of the country.
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! C. Y( k5 h5 ?7 ASince the beginning of the Second World War until recently there was been a sixty year hiatus in production. Dr. David
3 {( Z( q% G% F& m( e, X' |( g( m( l* P1 bGrimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part / G6 f+ E7 U+ [7 N& `
because the deposits are no longer mined and the supply is generally not available.” $ P( a4 o5 w" {2 k; Y
0 O h8 J3 `8 A" \- G& xLeeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and 1 {3 L5 \8 K/ Q4 V. q: Q- D
platinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold 0 r! ]& g5 O3 l7 f! u' s. x, o
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening ! h$ n# d0 ~2 f/ G
the amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per
! R Q! l3 ^5 Gyear. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural
" z8 o, B: j) N* OHistory in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a
' Q: Q0 K7 l' C9 Y% B$ C* z6 rscientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a ' O/ \+ ~, k2 i' S9 f- w2 L( L
scientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a ' I! B+ V4 M i0 ^1 I2 B t
description of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous
) T R- ?1 P( e3 [! Y- Fage. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from ; L6 P1 A" r* q* W. V: x
which commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber.
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# L1 V& P4 Y/ p, ?Since scientific study of burmite began, there have been numerous scientific papers on the unique biota found in 8 B7 T* o/ g" A& `% ^2 d3 ]6 Z4 H2 D
burmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber.
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