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本帖最后由 德道 于 2010-10-30 22:21 编辑
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Burmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin ; a. o B4 W: B! h3 \
State the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources 0 Y, T f5 _$ ?# ~, m8 {* p
amber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China .
( U1 t" z- @; [/ lFrom there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was * S4 u+ R+ ?8 h
highly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring 8 f1 p5 a2 A k6 }
to Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two
% T! y& e9 |, o* Q$ t0 ythousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also % Z% c3 R* g( N/ d
used and is still used in Chinese medicine.
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$ Q. i* b2 r7 ?1 r) ]& V) `5 cThe first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez
+ j' N, `( I. `% q8 SSemedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to , x8 b Z% @3 a6 X2 b# j# e( o
red amber from Yunnan Province by Du Halde.
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# Q! R" D6 W0 l0 ]" `In the 19th Century, there were a series of reports about the location and mining of Burmese amber By Brester (1835)
4 a: f Z4 J Q6 Q5 X( \and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng) ' h! L9 i# E4 |5 P4 a
Valley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow & Y6 U9 _( N# {
pits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the ! V0 I' U" S! s% s8 M$ S( I( q- V
“Hookhoom” Valley. Some pits, he observed were up to forth feet deep. % W0 Z2 [7 p5 P5 m
$ m1 S1 w$ a' N# T8 B# j. hIn 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to
1 n9 k3 w& b7 l. g8 [$ @0 XIndia . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to
; y h, M* `- v' aMandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of # s8 O+ N- l7 L% G
northern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name & y! D; r ~) m D1 k6 X" F
burmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in 8 R: U: q" x& Y$ T' M% }
1893. 8 V6 D ]" z- t% B" A! u0 L
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In the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the ) e8 N4 G1 _0 Y2 l3 E
Second World War, both the production and study languished until the 1990’s. This was due not only to the war but also
; P; E$ |2 v5 x1 [% `/ ]# Y! cinternal turmoil within Burma following its independence from Britain in 1947. % A+ W/ I1 k7 \
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Cockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly
$ j9 p5 s' E" F3 qUpper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District + j# |1 i# F J
from 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the , ]/ E5 `9 B- ^7 w1 j& N# T
Hukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson
1 k! O5 q* e; h* X, A: T(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as
2 d. t' _! i- y1 B1 }9 PBaltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits.
& ^1 C5 T/ D7 |/ T* L6 WChibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period.
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. M# E; K; W% w8 m% g) FDuring the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the
5 E' R; i. v6 I4 u; nJapanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the
5 `$ d: Y3 \- V* Vconstruction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected
. G5 `1 s u, E2 V0 u2 {/ bup with the Burma Road to China . This road provided a back door to supply China with desperately needed war
- @# [. F) x/ d- U, [material.
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Since independence, Burma has been racked by internal insurgencies including fighting between the Kachin , U/ `! ?, S5 k. `* Q
Independence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited . h8 x1 J+ g* O
access to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese
/ G+ k2 Y0 g; r/ V3 n- \- K" j% b4 c: [name of the country. # {0 `. _; I; z, Q% B! q: }4 H, |; ?
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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 - y0 ^% h6 k$ t3 n! S T
Grimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part
$ T& @5 x+ C3 j' E- @" n- }because the deposits are no longer mined and the supply is generally not available.”
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Leeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and 7 G, x; e5 \# l5 G
platinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold . Z' t& O4 |, s9 d) ]
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening ( o4 V: y: @3 a* G/ A4 i
the amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per
2 }( A( R6 E8 hyear. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural . p' \0 f% A7 h7 h
History in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a 5 x6 @* {, k! W, N7 T' Z
scientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a
3 C. B; e6 }6 u+ [( Fscientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a ' T& c0 K, Z( o2 ]
description of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous
" g3 q) M6 c- v& zage. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from . D+ \) |9 f/ [' o- G e( F5 k
which commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber. 7 y! ^. t0 A/ j: z9 T3 b7 Z8 w
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Since scientific study of burmite began, there have been numerous scientific papers on the unique biota found in
3 `5 H' l$ ^+ S8 K; ]$ | @burmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber.
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