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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
. c+ d1 V0 B: r7 iState the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources
( Z! B$ U$ |9 X0 m9 o# T& {! ]amber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China .
1 E1 z8 R" G* A$ f# [! p2 ?, f IFrom there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was
0 N: E r1 y! p" o+ P" yhighly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring * t* @: p# S6 A4 p
to Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two
Z3 n4 K1 X% z5 Mthousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also
+ v" _$ [" {0 ^5 A$ |9 I% A$ bused and is still used in Chinese medicine. 2 d# c6 n$ x! z* ?
8 W- p9 r: K; N; H+ kThe first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez
1 X9 B4 Q- p% X, [5 z3 j3 S JSemedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to ! y. m1 Z8 G6 I0 h: p3 a9 |
red amber from Yunnan Province by Du Halde. f0 v! [4 I4 h! N( H& f
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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) ) |6 D* N1 L+ v* i3 B
and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng) + _: L" H4 K/ E
Valley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow
2 r+ [7 @$ k- G1 a- l: Qpits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the * k( H: n' l( ^
“Hookhoom” Valley. Some pits, he observed were up to forth feet deep.
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In 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to ( m6 V+ ^" Z7 w! ~5 a( R" ^
India . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to S7 t5 r& {2 U+ e' ]# X
Mandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of
) z# Z9 y( D! F* T. Unorthern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name
" k* H: R; z A! }4 cburmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in 1 Q+ }9 o% Q& L, P. P& E p w
1893. 1 ^: D0 I0 V1 X3 _6 g- i
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In the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the & H$ v3 k! }$ {5 c% a! W2 [% T
Second World War, both the production and study languished until the 1990’s. This was due not only to the war but also
2 l K2 X( V, P$ r5 ginternal turmoil within Burma following its independence from Britain in 1947.
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h7 k% } b9 s4 mCockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly
9 V9 J$ N, S3 B" d" f8 z# uUpper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District
4 d3 g3 o" h6 K0 y' o7 P( Ffrom 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the
4 c$ u2 o2 A n3 Z2 MHukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson 4 S+ m) b* v; Z* u! N4 k
(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as
1 A/ J& ^2 t# @7 ABaltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits. ! [- g) R* y1 d! Z, }* y: K, ?- _2 t
Chibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period.
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& {6 p0 q1 h+ r3 \: hDuring the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the
+ x( ]' r* c$ h( o7 V3 }Japanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the - ^1 |* v0 g3 S c- ~) y( D
construction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected
- R9 m" N& p" o4 Z2 \# W. Pup with the Burma Road to China . This road provided a back door to supply China with desperately needed war # h4 g/ [/ c3 |
material. 4 l& H1 \# C3 n, Q& b( H3 t
' l) K* B) Z7 k( f$ FSince independence, Burma has been racked by internal insurgencies including fighting between the Kachin
6 c" S* w) H8 g+ Q7 }Independence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited 0 p% U& K1 R- @, Z0 _
access to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese
0 ?( M. W/ K/ d3 H( A9 [6 cname 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 * ^& M- _7 p; `. Z- y
Grimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part
4 P7 Q6 J4 C2 ^0 C; U( N, @, k( Y# kbecause the deposits are no longer mined and the supply is generally not available.” 5 M9 q& \: N8 p4 k) \+ |0 J
. ^* X2 P( M q. F! V5 N3 G2 }Leeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and # B. j' O" b+ w7 l! P/ w# D$ c3 r
platinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold 8 y' X7 d/ |. i$ g |$ v
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening 8 D; k3 A5 f" g/ q( ]& W1 P; e+ S
the amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per 2 g. F8 a) s O# c/ r. w/ G
year. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural
" X6 D$ x! t5 _; MHistory in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a 2 ^3 Q5 ~4 R) a8 T
scientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a
7 Z* l) O: a$ \( [& pscientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a 1 r% `2 u( ^* W" `: t2 Q
description of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous
4 B) L) b. g: b# c; K9 b, N5 S# w/ ^4 hage. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from 8 I9 l7 z+ W1 M' m% n6 V
which commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber.
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$ r2 J9 `, t, A# h7 k) H! YSince scientific study of burmite began, there have been numerous scientific papers on the unique biota found in
, M$ o9 G( |, I: dburmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber.
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