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本帖最后由 德道 于 2010-10-30 22:21 编辑 . z. w: I7 N0 v2 t6 V& Y
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Burmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin 4 H; Q% b0 u/ ^9 o
State the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources
( r+ y1 m, k& Kamber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China . 3 X1 E% o% J/ X7 l9 p5 r3 X. O- C
From there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was % y! J5 y* U2 G4 w7 F* p
highly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring
" Z# z) W* ~' T7 L- u# vto Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two
5 |0 E+ {8 U+ n3 U& u; kthousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also # @1 }1 ]! y1 |: c/ y1 A
used and is still used in Chinese medicine.
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( i' |, N* m# u! vThe first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez ! \" e3 k9 W+ t
Semedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to
8 N! P1 J5 x- D2 jred amber from Yunnan Province by Du Halde. . H8 k0 }& }: ^$ |7 Q$ M' D$ a
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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) & g; h3 d6 Z8 d( P* j* w' n: G5 c1 ~
and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng)
# i- Y' o# M7 Q- r, ^Valley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow ! Q- ?1 V4 c/ c& Q! S8 y2 s
pits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the
& o1 ^' ]9 i9 o6 R m“Hookhoom” Valley. Some pits, he observed were up to forth feet deep. ; s# S T5 y# Q5 h; t
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In 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to & \9 B& z, W; x: m/ d
India . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to - R# c9 ^( z7 N2 W8 j5 O) f
Mandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of
! f2 [4 [$ G* V6 Q) d& vnorthern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name
2 J* _) L H) G0 a9 s' Dburmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in
2 _; e" Z; r5 _ ` C( y3 y1893. 9 e& E: H0 e. N
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In the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the
4 j8 D5 k0 u0 C( _2 S' S1 bSecond World War, both the production and study languished until the 1990’s. This was due not only to the war but also 8 B% @/ G2 E% \9 o M
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
6 b' k2 Z# |/ W8 cUpper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District 8 T# x" K. u7 y6 }3 C
from 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the ?$ k/ k9 o K+ L0 P1 C
Hukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson 2 s' i2 y! r7 X$ s) p2 Z8 R, v
(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as 0 H4 K0 o& M* ]4 P
Baltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits. . ^8 K' a# W7 e# G$ R% M' @
Chibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period. & Z5 P+ n% v, V$ U8 \ e* n$ {5 c
7 |1 [ P; G4 o8 i- dDuring the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the
! K% S9 P, D& J! kJapanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the
' e# F; R. r) D2 O; ~0 pconstruction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected
- G# u7 O* Q: Y& rup with the Burma Road to China . This road provided a back door to supply China with desperately needed war }/ R6 X% r, |+ ?, R/ T. g8 ]
material. 3 v' o4 m' \: s5 _: U2 ]5 O
* ?) B( n: A1 H' t% Z' ^# _Since independence, Burma has been racked by internal insurgencies including fighting between the Kachin
6 f* ]% Q5 N1 J2 d% \7 EIndependence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited
1 W% b: y" p/ {% T+ q+ ^access to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese
6 H3 C; ?! ^: fname of the country. . w8 Z: \0 L1 i4 V8 ^: }9 W6 R' s
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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
6 P; ^- d+ H! }7 bGrimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part
$ ?% ~4 Z* ~. H8 S" j* b% C8 f) M) Kbecause the deposits are no longer mined and the supply is generally not available.” 1 R6 _2 r3 M" r5 i; _3 j
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Leeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and f- B/ D& [5 a$ F m& X
platinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold ; w: k( |0 u& w
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening
! D" \: N" n2 a0 ithe amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per
7 G+ x. k3 o" I3 S8 g1 f% Kyear. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural
) ~7 I3 D8 c0 B* P0 ?" NHistory in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a & C: Y {6 \3 O- [5 X& V
scientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a
& l; A: y/ U' m8 X# X! w# y0 lscientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a ) Q! Z, _# S3 Z) r7 \4 l& G
description of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous : F; A- H9 C/ Z8 O
age. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from
4 P1 I/ g. J! S3 V) c; wwhich commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber. : Y0 W% U# X1 w( S! n6 q3 u
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Since scientific study of burmite began, there have been numerous scientific papers on the unique biota found in , t: B& w) Z- o& {% B$ ]
burmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber. ( b! b( S( u9 u. s: y3 w
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