|
本帖最后由 德道 于 2010-10-30 22:21 编辑
9 e* B; h! e( ~9 R y, s; a$ b0 G: ?# M% h" W" Y
Burmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin 2 I9 z# i N6 Y( ?9 g
State the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources
; C! n |$ r2 a6 R: Z& e( oamber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China . - e7 @3 |1 Y: t& v
From there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was & a6 ^6 h$ V% _2 `4 Q( |
highly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring
. h* B ~" O' n- ^# ~ ?to Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two # s2 F( s# r, a3 `' d
thousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also
0 ?3 l, f$ l5 C6 H/ oused and is still used in Chinese medicine.
/ S/ f7 Y- u. ~
! C% E7 h) E/ I) A7 g$ D' v8 LThe first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez u2 `0 J4 O0 p- {9 [: x6 ~! r
Semedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to
$ J2 N1 l! V' c4 u& x. ~red amber from Yunnan Province by Du Halde. H" W! D5 E. x
* W4 u2 }6 ?- t& [3 m0 _* c0 g: ~In the 19th Century, there were a series of reports about the location and mining of Burmese amber By Brester (1835) 6 [7 ^6 u, x0 x# }6 {! d
and Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng)
) i. x ~) M% S- i6 XValley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow
# b7 m; d9 J! T: U/ Q, |pits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the
3 [/ e2 a: I8 G7 k/ y- D“Hookhoom” Valley. Some pits, he observed were up to forth feet deep. ! N! {: p& ^+ k" i$ O, s s5 {
7 w& l5 t* C2 M; @( M! @
In 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to
% x# g1 m5 T" o) zIndia . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to 1 r+ ]+ b9 D6 \- \
Mandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of ) C/ _0 I) a: k1 L! I1 R/ o
northern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name
- _. D' e; x ?burmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in 6 z% W9 c" D3 S5 w: R# z
1893.
" h& x: S' ?/ q0 r. P/ B5 X' f6 L2 {4 d M
In the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the
3 l3 c3 e% \/ ^ G$ S ?Second World War, both the production and study languished until the 1990’s. This was due not only to the war but also , e% z; s, R5 c, t7 r. a& W3 m
internal turmoil within Burma following its independence from Britain in 1947. ! s6 a4 ~+ K9 |* E
4 o2 i& f; ^! O5 e8 \6 lCockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly
8 `1 u4 k1 ^) g8 ?2 kUpper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District
* ?' N: L" F+ d5 c7 J* F \& jfrom 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the . P: U; x/ ]7 d7 S! o9 v
Hukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson
( _% v- g. K, w2 C1 l& l2 k(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as
& i- J9 _, F2 t0 a9 RBaltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits.
8 X4 ~6 E# u* @, y* rChibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period.
; x2 }5 d4 Y* a
W4 i% T D0 ]During the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the
* G% C* ?' G# d; lJapanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the
, x' X* ^( h ?- S2 e Iconstruction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected % K2 S" `" [( e; n
up with the Burma Road to China . This road provided a back door to supply China with desperately needed war ! d( h* C: _8 G# ]4 \
material.
5 P' w# R% e& f2 X
* M7 _! S( K. M3 o# j: qSince independence, Burma has been racked by internal insurgencies including fighting between the Kachin
9 @6 i& g/ v1 Q- b% f' y7 d6 E( DIndependence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited
; y' y: c' S- R3 e% G/ kaccess to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese 8 N9 Q* p* h2 G3 J5 q: q I, b
name of the country. ( N7 z' B* h: z- e# A1 T( F! B
0 w) @& s3 L4 Q
Since the beginning of the Second World War until recently there was been a sixty year hiatus in production. Dr. David 7 I9 `) Y+ r) E0 f( S+ e2 i
Grimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part
; [; s! p0 V" |% ~because the deposits are no longer mined and the supply is generally not available.” x+ j# \5 M" T: v
0 X) q3 R1 D" k8 x; X- K+ G5 Q
Leeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and
4 R; {1 m5 w4 w, L- g# Jplatinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold
0 E- Y( w% T: x2 C u$ ]" Yprice, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening
$ t" O) U! B* y! Uthe amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per
H( c d/ A. J7 r0 Gyear. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural ) s- d: E. a/ ^8 q! Z
History in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a * e* \9 ~+ f1 M7 M
scientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a - q K! e& [3 _+ [- n
scientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a
6 j3 r I( i* z6 s% sdescription of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous
. M: k' L) Q4 L( Q0 d6 Y9 ?age. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from
. S7 N# v% l1 d' Bwhich commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber. * C% v4 y6 b' l' w; i. T# t
& H5 L7 _+ G5 F$ [1 [- m
Since scientific study of burmite began, there have been numerous scientific papers on the unique biota found in " ]$ f4 S8 g8 f- g
burmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber. m# h$ U8 H& E0 v! j6 F
|
|