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本帖最后由 德道 于 2010-10-30 22:21 编辑 5 ?; C" T; X5 p
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Burmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin
1 ~3 k$ _! E9 L/ oState the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources 6 T* }, B* h/ h2 E5 \* Q
amber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China .
& o7 M# I3 | NFrom there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was , w( p& _8 @( 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
% T2 \3 [) n$ }! Mto Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two
# D+ C: }& ^3 B6 X: Mthousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also 6 E" M6 O: ^6 b8 {# S; H
used and is still used in Chinese medicine. 6 r0 S* A# P$ _% l1 j! X; K
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The first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez 8 g: C/ H' E4 h6 e2 [! q8 z
Semedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to 9 X, A% G2 L& x# p1 V8 g$ Q
red amber from Yunnan Province by Du Halde. $ G, Y& ~, A: i
: u" g) V7 Y: JIn the 19th Century, there were a series of reports about the location and mining of Burmese amber By Brester (1835) 2 ~ P1 R; I0 `' j
and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng) % O) f ]1 \; S2 y/ N9 T8 J
Valley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow V& @7 t& }5 {- `& D$ i# M' R) D
pits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the
- R) U* C( u4 M& O& t+ Z' i“Hookhoom” Valley. Some pits, he observed were up to forth feet deep. * f* X# S2 V3 S$ O/ |
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In 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to ; E" Y) \# @# T9 q7 |
India . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to 7 y/ H, D" {9 J' C5 M2 x) E& ~
Mandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of
: `8 |% z8 ?5 D% znorthern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name 3 G; }( D: O d& q5 z9 a
burmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in
1 J" J' q Y% i% x1893.
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In the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the o8 ^. f9 q, X
Second World War, both the production and study languished until the 1990’s. This was due not only to the war but also ' i a4 b! e7 q5 b p3 e
internal turmoil within Burma following its independence from Britain in 1947.
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' d! Q- Y# z* p. Y2 E4 zCockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly 1 h3 ~9 t2 P7 A/ C
Upper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District & h9 C5 z1 z* h' m, s
from 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the ' u' r, s9 E9 A1 k+ |. S" V
Hukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson
- N. u& ?- N; i' l) {" J" X(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as 1 {4 n/ @( Q0 j/ }3 t3 {2 H. D
Baltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits.
& _& x. M# W5 | F, d9 B$ KChibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period. 4 V" L; F) E2 ? k
N" s7 H1 s3 BDuring the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the & R2 C$ A: F4 t& P! p Y. D$ q* @$ H
Japanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the 9 f& [! B5 `* ]2 V2 s' d. x
construction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected
M/ F/ Y- J! f, c/ Yup with the Burma Road to China . This road provided a back door to supply China with desperately needed war
5 k2 \. \, k( u8 U! Q/ a4 |- |/ Ematerial.
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Since independence, Burma has been racked by internal insurgencies including fighting between the Kachin
/ t; K) s' }8 V4 C( O5 C0 A7 `( kIndependence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited
/ D5 @# z' f+ H; Haccess to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese
F( w( f5 J5 `( Vname of the country.
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" O: ~6 Q' R4 s" f6 I* g# O; LSince the beginning of the Second World War until recently there was been a sixty year hiatus in production. Dr. David
, f# ^- E- J' }+ n) qGrimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part
2 x' _! U1 C t8 _4 Q3 z2 bbecause the deposits are no longer mined and the supply is generally not available.” : ?: w' H6 A; T; R4 B i& l
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Leeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and
; X/ k' R- ? S" y6 G q$ jplatinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold 0 W$ E& d8 ^) U" X
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening # ^! m3 g O* j* S
the amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per
3 j/ I" ^9 p: Q+ tyear. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural ( f4 m7 V4 I) Z! A4 G. P7 a
History in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a
- X3 ~9 s3 I- f9 I$ P( J5 Vscientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a , s' G J* X( u! W! i @. F! c# b
scientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a 9 t' N P' C* K% h: J3 y
description of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous * W6 d+ }/ i" e m. c/ u
age. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from
5 M8 t$ z' r- y9 S# `3 _, wwhich commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber.
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Since scientific study of burmite began, there have been numerous scientific papers on the unique biota found in ) k. n( a! q/ n- }) z+ H8 C
burmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber.
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