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本帖最后由 德道 于 2010-10-30 22:21 编辑 3 `. t5 ^8 ^+ o; T9 q
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Burmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin
) h7 n" F1 T' h/ RState the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources 8 H4 O- T+ x0 {% d# G
amber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China .
( I, z' y) K- D& ^5 W5 }9 SFrom there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was . y7 u' c! g" @5 u8 z$ C( 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 % u0 \- k9 H- \1 {" g: U
to Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two 6 _' Q n: d* I( y& \0 B
thousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also
9 s( @8 Z+ ~9 G) _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
& O0 ]5 f5 F( r" {Semedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to 5 \" x5 T- I4 u8 o) G
red amber from Yunnan Province by Du Halde.
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% O9 f# \: F; V0 A, k& a3 b9 a( CIn the 19th Century, there were a series of reports about the location and mining of Burmese amber By Brester (1835) 1 Y5 _" Z. J8 G6 b2 e2 n) o# P
and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng) ; M% ~2 T5 T1 r# f6 Q3 U' c+ e
Valley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow
% W# S3 {7 F; H: mpits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the 2 Z9 J/ ]; o7 Y5 O$ B; a
“Hookhoom” Valley. Some pits, he observed were up to forth feet deep. 3 {/ `+ y4 C' p+ P" d
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In 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to
' }9 D: B3 U! b" n! O* |( |# GIndia . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to
8 O) S; p" A) M O$ [7 j0 ?% mMandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of
+ L+ o# w5 ?: Z4 O. R& N0 V" Xnorthern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name . S O5 l( h& i% j) ~0 t" X
burmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in ' I) b+ H+ |, L0 K
1893. 0 k1 [' f# P! y
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In the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the 2 V7 ~5 g: c2 z$ \2 u* ]
Second World War, both the production and study languished until the 1990’s. This was due not only to the war but also
) T$ F5 V3 e, E- r+ einternal turmoil within Burma following its independence from Britain in 1947. 0 `+ S4 E, v9 t0 `7 M; B5 w
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Cockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly
( t+ G$ R" G5 y; B9 M' Z, qUpper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District , D9 a5 G3 O* o f% R. U) U8 ]
from 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the 2 }4 j% R' Z* d; M. [/ Z7 Q$ p; V
Hukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson 8 W, a7 c8 Y+ ], r6 u2 Y) [ |
(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as
6 s: O, K4 q' x: s" h; S( xBaltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits.
1 x9 Y; y8 O. ~7 |$ AChibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period.
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During the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the
# L8 `) J' M5 eJapanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the ) `& ~ ]# M9 ?. r# F4 s6 n* L2 y
construction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected
4 z' ^' M- y pup with the Burma Road to China . This road provided a back door to supply China with desperately needed war ( o9 Y! ?1 a/ P7 e/ W
material.
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Since independence, Burma has been racked by internal insurgencies including fighting between the Kachin . L/ f+ Q$ ]' ]5 B& }% g" a/ D
Independence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited
+ T4 {( N, C/ z- D" e8 Y4 P2 N/ O% Zaccess to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese
8 l% X6 ^1 W0 c oname of the country. & C' v3 Q: Y8 n- x& B4 h/ B
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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 & I' |, S2 x, d# e ?7 |
Grimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part
) S3 B! S$ u2 N% vbecause the deposits are no longer mined and the supply is generally not available.” " ]- h! }! d8 A. _8 J
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Leeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and , B9 k( d) W6 c8 G+ w
platinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold * O6 N& {* o- s) R" V
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening 9 T* G: v" K' @* R0 }( @6 c
the amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per
: x: i7 N" H; u% V/ p0 @! A" vyear. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural 7 B- Z! q% h2 Y( `+ j" v. }+ Q
History in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a 7 |: m! Z6 y( }
scientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a % `, A2 y" i5 ?1 I) c% s- c
scientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a
' t: ~. e9 n. M+ Sdescription of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous
& V0 D$ s6 t% T- c& E2 K5 oage. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from " n% z7 ~- T! K+ s# U6 \8 }
which commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber.
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; R& f, ^! b4 p: ~* m1 ySince scientific study of burmite began, there have been numerous scientific papers on the unique biota found in 3 k& Y3 ^6 Y, v' [
burmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber.
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