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本帖最后由 德道 于 2010-10-30 22:21 编辑 # H% d; ?0 s# w
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Burmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin
9 p3 @$ r9 }0 q: ^8 [State the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources # G. R6 B G# e3 t
amber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China . : i" p+ w6 c: H+ Q R' g0 o
From there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was # E, i: i) J* o* d' D
highly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring
4 y, a6 B& \$ wto Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two , }) \# j, B, b
thousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also ' t* N2 d6 G( N+ n" M
used and is still used in Chinese medicine. 3 Z# c0 R' X5 Z/ y# I G
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The first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez
, q5 K3 R7 l6 Q/ y j8 tSemedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to
" i- b q2 u- F. n; T2 yred amber from Yunnan Province by Du Halde.
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0 c9 M2 Y3 f( O# p- m7 k0 vIn the 19th Century, there were a series of reports about the location and mining of Burmese amber By Brester (1835)
- c% p* k7 J- ?7 H0 J. r, ?and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng)
0 K/ R% S, ^* L; d* [& b- OValley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow
" V' j2 y B8 o q6 Zpits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the
; ^; {6 B( R) n$ ^# K2 v' h# o$ ^( H“Hookhoom” Valley. Some pits, he observed were up to forth feet deep. 7 R7 O0 X3 D, D1 x
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In 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to
( R) Y6 c1 p# l1 J2 D9 UIndia . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to
4 G* P. C; i+ H$ U* S/ c0 LMandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of
, o1 L+ F7 Y7 I3 x- Onorthern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name & K3 e1 v4 n0 R1 e' s) I S( P$ V7 {
burmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in
& ^% H. J, C+ ^7 N x" a: M1893.
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In the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the 8 X, N+ P( K* D, v, k% Y j% M
Second World War, both the production and study languished until the 1990’s. This was due not only to the war but also
% H/ d- g& X e, O/ [internal turmoil within Burma following its independence from Britain in 1947. 0 X% @/ N1 k$ A
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Cockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly 6 w2 j& Q: a% o! T
Upper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District
: I9 ]# ^( x. j% s3 i; tfrom 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the
1 {8 D9 S; w& q. A- z* i$ z2 \Hukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson & v0 Q# F( e2 b3 Q; ^
(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as
3 R% ^# N1 `7 ^/ g8 H2 K) UBaltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits. 5 r' n+ o! V0 b2 T# Z0 p( x. w! i0 x
Chibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period. & T" L: D7 }# P& M: {" R
+ d. m6 z- u. r9 m) @! V1 p) CDuring the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the
9 ], \! |4 J0 ?3 n; l) s+ oJapanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the # o) r6 H( u; M1 K% f* U5 _
construction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected
# V! G% y* i9 `% B0 ~5 Rup with the Burma Road to China . This road provided a back door to supply China with desperately needed war
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/ J" `# O0 H0 hSince independence, Burma has been racked by internal insurgencies including fighting between the Kachin
; H8 q7 Q: n( O8 c1 v: d6 d1 UIndependence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited
' g. Q9 `: b* a, ]% k( iaccess to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese
+ ?, {' Z# @) z. X; ^name of the country. & [. o9 C z* n0 f w/ [0 @& W
9 t4 a- O. X$ i( y* W {7 z5 u ?Since the beginning of the Second World War until recently there was been a sixty year hiatus in production. Dr. David , b* @0 u, _- i
Grimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part
/ e9 R" ?9 a& e( l+ E# F+ Dbecause the deposits are no longer mined and the supply is generally not available.” & a- U4 ^! K5 `! f5 ^/ b
* A2 p0 X# T5 C% U/ y% p6 sLeeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and 2 o0 x2 G% O9 g# u4 s/ L! l3 g# E
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% I$ r1 I0 ]% V9 X
price, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening
3 d( f+ F! a0 \8 k' \% p1 othe amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per
; R7 A2 x6 |5 g+ a8 s: |year. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural
8 f; E3 d, ~# C: X" q YHistory in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a * |! K) ^7 I) f: w6 R
scientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a
7 H5 K: N, R6 k Gscientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a
) e# v: M. X+ }! Vdescription of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous
2 h. S0 J/ W2 b# U* lage. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from 2 Y: P' u t9 M$ A% q
which commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber. 0 v+ I4 a- a( W$ s- H, D: h
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Since scientific study of burmite began, there have been numerous scientific papers on the unique biota found in
, O7 n4 F* W) F2 u- g/ ]burmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber.
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