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本帖最后由 德道 于 2010-10-30 22:21 编辑 . d9 }6 C, A0 O# r5 O6 ]6 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
+ U4 ?, i& c1 n; Z6 P/ T& uState the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources
9 h9 U+ n+ Q, ?9 {6 l; f1 yamber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China . 7 e# z' B, J2 |# Z
From there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was + ]% E9 w* i. g0 D. W, k
highly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring 2 m4 n( G1 d# `! e
to Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two 0 n, h: Q" S5 w
thousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also
* p8 z* M! n9 I' G; l( v4 [used and is still used in Chinese medicine. 6 }& ]. }4 c1 x
2 m1 l1 [- z$ @6 E5 {- N$ FThe first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez & ]/ h& r; I0 p5 T2 k% r7 m# s
Semedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to
% T+ e4 {# k2 Y- ~5 D3 _, }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) Q$ h, b2 P1 s
and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng) 8 T9 m/ h1 r1 u: t
Valley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow
3 L1 K9 |, F: N' u, B, [- x: Y0 ypits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the
6 A* l3 J# _, L! R* W( K/ C: Z; ^“Hookhoom” Valley. Some pits, he observed were up to forth feet deep. ! F9 j3 k- V) z( T% c% U/ @+ d
( e" [7 `, E% L$ P- ~In 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to ' k- E' u3 G3 X. N- j
India . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to # F1 B. p1 v: R, b% e- N6 W, ~& S
Mandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of
- J& n0 I. e+ r: f$ ]northern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name
1 _ o# q; O+ s2 cburmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in 2 P( g6 [' P+ w# D) d: v
1893.
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2 I. c) m8 y+ v: M+ N- VIn the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the ( \4 r# S, ^3 J+ Z* ?- |+ a: S, x
Second World War, both the production and study languished until the 1990’s. This was due not only to the war but also * \# @* \! [7 @* }! h, o
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
/ H, B* I+ L, C( F1 P; B; D' vUpper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District
( s3 ^% i N1 l; Cfrom 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the
9 {$ z2 L1 F! E; g" B8 yHukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson
. ]% f6 d( L. O(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as , k# w) T2 o0 C0 n" u
Baltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits. + J9 A/ E5 L: Z# \* j P$ U
Chibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period.
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2 y, T3 M% f! u0 R5 RDuring the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the
, s% F/ M9 Z% I, X, W% I N% ~Japanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the & P( z1 b3 X5 {+ L# w3 `1 v
construction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected
6 t7 E6 d# i4 T, X# i7 C0 gup with the Burma Road to China . This road provided a back door to supply China with desperately needed war
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Since independence, Burma has been racked by internal insurgencies including fighting between the Kachin & R3 t0 u! r2 g& }) S) A' W) S* t
Independence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited
+ L/ Z0 x+ O: h$ ^. jaccess to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese
) Q; i9 h8 u8 X' \( a9 Uname 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
. x4 l0 T( T7 _9 ZGrimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part
& b6 h* }+ S# u* E8 r! j0 Fbecause the deposits are no longer mined and the supply is generally not available.” 0 R. @ D' [9 k# v: d8 M( g, B
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Leeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and - _' p9 D- G/ G" x [& @3 ]
platinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold : a8 l5 w( w) l( v' s$ H
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening
& c# U$ c/ T' Z2 `5 G5 P" k% lthe amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per " d1 k- s- x- J* ~
year. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural
# r$ M$ D7 H H8 MHistory in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a 9 u3 x- j- `. n3 v
scientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a 1 y9 `8 l) q: F- k* v& g6 p
scientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a , N2 a* B; H1 g* f& \; k( w% r9 e
description of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous ' J4 M9 R" x& M1 U6 W: C
age. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from " Q* ~9 J+ Q! c
which commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber.
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# E$ s0 `" D" w8 N( d D# {Since scientific study of burmite began, there have been numerous scientific papers on the unique biota found in
1 q0 V+ h# z1 hburmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber. 2 b: x$ M J. x* c# Q
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