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本帖最后由 德道 于 2010-10-30 22:21 编辑
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4 V" e! X0 J# ?8 D1 B" F/ q5 CBurmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin
4 N: Q. R; m2 D: @" a5 ?9 BState the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources * A. ~' s7 c C! f5 B* _( @
amber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China .
; ?) k9 X* }: b+ l, T' V8 vFrom there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was , r* o) C1 _# `8 w; }8 j& F( o
highly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring
$ Y0 M, C2 a' C; K7 {, }to Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two : }7 `3 w& z3 Z
thousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also
% F# X3 }6 _3 g6 f2 uused and is still used in Chinese medicine. # N h* Z$ ]" o& _7 S
& I ^" r) C {: l) qThe first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez
& I4 b/ c* W" A" D: f7 DSemedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to 2 g; j1 h% y% P {# V
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)
" T- a/ h9 H. Wand Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng)
; T2 P' U& U' V% }Valley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow & R. A9 j3 M7 c- u# ~+ x
pits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the
! s3 q8 B: L! Y7 d3 z3 H“Hookhoom” Valley. Some pits, he observed were up to forth feet deep.
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; ?! u5 z% U# N) \, i4 q0 d; `In 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to 1 f5 a* d: W! ?$ I
India . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to $ ~- u- q' j# e& o6 X+ k
Mandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of 9 }) L/ r. l6 V/ y
northern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name
{1 r! C, u) d( m! D* Oburmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in
4 Y/ ^9 R2 n! b5 p1893.
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- m8 s; a% r }) [- ~( d. q1 ]2 QIn the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the ( c- y9 |1 A/ y% `& ^' ~- ^
Second World War, both the production and study languished until the 1990’s. This was due not only to the war but also
( d0 Z' B8 F3 m9 u' \internal turmoil within Burma following its independence from Britain in 1947.
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Cockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly / ? _2 Y/ j- e' J# _1 x
Upper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District % s7 A: Y; f1 m( y1 w3 F* I* p! i V
from 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the
7 N7 `/ W u1 b( HHukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson - H* @ f! \5 f3 J' l" A' x
(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as
. A* ]. @+ J, \- k* j* pBaltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits. 1 O+ C" I2 W/ v: V0 |4 y. N
Chibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period. 4 H1 u' {' T1 v' `# z; p
# H9 A: ~/ G( W- e8 e/ C) \During the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the $ R% ` w3 X+ R; E6 \4 W$ D( c6 a
Japanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the
* _, r3 u9 ^& X# y# X6 wconstruction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected % g. K, v. H( S/ I
up with the Burma Road to China . This road provided a back door to supply China with desperately needed war
. J; l, l) h# V, m4 o2 a. d% mmaterial.
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Since independence, Burma has been racked by internal insurgencies including fighting between the Kachin 5 K: ~' ~% z4 x, B5 k
Independence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited
' L3 G( M/ [$ u" `3 O5 M# Waccess to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese ! q4 R: P8 T" y( B; r6 Z( r: O
name of the country.
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Since the beginning of the Second World War until recently there was been a sixty year hiatus in production. Dr. David
& ]- F |' o" i" A% k, @Grimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part
" r+ A9 }. b) o. P6 qbecause the deposits are no longer mined and the supply is generally not available.” 3 y4 Y, a i0 u5 g* F& j
$ ]8 [+ T. I9 ^, ~$ {6 ZLeeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and : y8 N: c/ M; v" [1 P1 q# i
platinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold ' m- W% C ~$ I8 E% R1 ~' l8 E
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening ( a7 Q$ O, P. b6 |, ]9 f/ g! L7 q
the amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per K0 L" n2 P" n3 h. v/ |
year. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural
7 c& V0 I: |7 W) d2 W. OHistory in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a / D. [# o) M6 K; l% X# t4 U& f
scientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a 2 ~- W9 V \# Q
scientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a
2 k* A8 p" h3 y7 G% gdescription of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous 8 T- |7 O9 q4 p/ N# J8 O5 p: d6 Z
age. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from
4 i; C `" |/ b2 F7 k% p0 ~which commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber. 9 Q/ k8 T, N& n, P, S, v- Z
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Since scientific study of burmite began, there have been numerous scientific papers on the unique biota found in
( i! _0 J+ R& }! I& j, F8 Z; mburmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber. 3 s0 d1 b5 l( U
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