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本帖最后由 德道 于 2010-10-30 22:21 编辑
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- z/ _% o* x3 [5 Z5 R6 W! lBurmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin ' [4 e: l: T' b/ j. A) L# e
State the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources , c. }, B. @2 q! D
amber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China . 2 M3 W6 y3 s& s# [9 j
From there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was
2 Y- O6 M- a! y5 H9 E& Q# W, I' Mhighly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring
( p+ q5 @' z4 z fto Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two
, f2 F u9 o, _thousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also , m! [' R9 W9 e+ X. X+ Z
used 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 . X; e, z# E( A$ {) H
Semedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to
& p1 E0 @+ d Z; {4 ared amber from Yunnan Province by Du Halde.
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0 P3 G4 l2 |% t8 |( @In the 19th Century, there were a series of reports about the location and mining of Burmese amber By Brester (1835) ' A: B. F/ F6 }% ?! K; N! j+ A
and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng) # G, O& J$ K5 ]2 |6 Q
Valley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow
! t* |$ u2 K: Gpits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the ! n0 ^4 N1 r- b9 L2 H8 o! v
“Hookhoom” Valley. Some pits, he observed were up to forth feet deep. + c6 G6 L8 p. M6 H+ v7 V# ]# G
! i1 N* I7 n4 a2 g$ b+ _# MIn 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to
- p( h! E7 ~' B7 i0 g3 b7 iIndia . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to * H; O( N( F: j* R- @
Mandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of 7 W" C4 v: | m y
northern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name
! V( `* V" p' w# u' B G( _0 }burmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in . R, W/ s9 J2 {8 Z' J) D
1893. + w8 K2 ?" H) ^0 E" F
; F( p, _4 g0 jIn the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the
3 d3 r/ m' k- I9 Q2 xSecond World War, both the production and study languished until the 1990’s. This was due not only to the war but also
# S. `# U( n4 f# Rinternal turmoil within Burma following its independence from Britain in 1947. ) [$ b. G0 v' J: |, \
$ Q- d3 v0 O8 @6 U& B# a7 kCockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly , E: N0 A5 r5 w! C+ ~% A
Upper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District ) d3 }) `3 z4 a
from 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the * T! }* k# k. y( i
Hukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson
" Q2 w( B- I$ W# B(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as % M5 T7 Z- d" J0 w/ D
Baltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits.
1 n' m* |) d% C o, W4 s2 `! SChibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period.
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6 A9 Z0 |5 P. S! Q0 j. J, ADuring the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the 6 f4 G5 b. [6 ]
Japanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the + d) b, b2 A9 l$ ^$ Q% |
construction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected
9 ?# o) k8 _, _( L8 }up with the Burma Road to China . This road provided a back door to supply China with desperately needed war j' ?# {3 ?8 h% B+ O* F
material.
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Since independence, Burma has been racked by internal insurgencies including fighting between the Kachin
: G) ]6 |$ \' ZIndependence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited
s3 y% _2 ^3 B% A6 zaccess to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese
, q! d% w$ h- C5 E' V% zname of the country. + B2 ~2 p G" N: {0 D3 D! z. ^& [
# \* b( T# x1 u4 D' FSince the beginning of the Second World War until recently there was been a sixty year hiatus in production. Dr. David
3 ?1 i# E- S8 V# K7 [& ^/ \Grimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part / a6 s4 x( S1 d/ ?9 D- u
because the deposits are no longer mined and the supply is generally not available.” 4 \' W# v7 U* Q8 r) c; k
x. ?2 q! N0 rLeeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and 4 A& V; c# |6 C3 q7 N5 [2 Q
platinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold " m J; d7 E/ Q9 Y) F0 r ~: t
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening
( }6 x, r/ L: Z2 P: k) F0 V# Ethe amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per
# Z) g4 g$ u+ N C0 D) n9 Gyear. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural ! O3 r+ _$ C# T. s
History in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a 4 ^. K9 S' r0 P/ B7 W
scientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a
. V* [- a( W1 wscientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a / e1 @. j5 _1 f. [3 I4 r ?
description of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous ) e( M$ M; p: u; z* r+ x6 U
age. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from & N- U0 e% ~; Q" N w
which commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber.
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& r6 ]9 \3 z# ]8 k& j, B4 DSince scientific study of burmite began, there have been numerous scientific papers on the unique biota found in
+ b% N' Y5 C, A8 f" Y5 Wburmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber. * n( U0 F N, s+ N
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