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本帖最后由 德道 于 2010-10-30 22:21 编辑 2 g1 h7 Y" W, v# `% {& i4 t2 K9 V
% M( L- S- Z$ [6 @; e! {* MBurmite or Burmese amber has been known since the distance past. This amber is from the Hukawng Valley in Kachin
! z. P# `: Y1 z/ z" ZState the northenmost state in the union of Myanmar formally known as Burma . According to ancient Chinese sources ( e2 T. G0 a9 v: P# V5 a
amber from the Hukawng Valley was mined as early as the first century AD and shipped to Yannan Province in China .
& P3 b4 o0 d! HFrom there, burmite may have found its way along the Silk Road as far west as the Roman Empire , where amber was
3 H; ]3 E# @5 d, x0 q5 p2 `highly prized. It is said that that a good piece of amber was worth the price of a slave. The oldest written record referring 9 u/ M* `3 P- D: y' L8 _
to Burmese amber was in the Annals of the Han Dynasty (205-265 AD). Thus, burmite has been known for about two
0 e1 r9 w7 I# @2 othousand years. Much of the exquisitely carved Chinese amber has its origin in the Hukwang Valley . Amber was also 9 x3 [' r7 W( _
used and is still used in Chinese medicine. . T$ _! p# ^" v
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The first mention of burmite in the western world by a European was by a Portuguese Jesuit Missionary Father Alvarez
& e o0 v6 z2 J* g0 C7 f/ r3 LSemedo in 1655. He noted that red amber from Yunnan Province in China . In 1738, there is another brief reference to ' H+ h0 b4 D8 K _% Q& l2 D
red amber from Yunnan Province by Du Halde.
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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)
; _- Z9 O2 `3 F8 c6 `# hand Pemberton (1837). Captain S. F. Hannan was the first westerner to visit the amber mines in the Hukong (Hukawng) $ l7 _; b/ p8 V3 ^% s
Valley. He described the primitive mining method utilized by the miners to recover amber consisting of digging shallow
( Y; X9 W6 W1 p6 Fpits with sharpened bamboo and wooden shovels. Description of the amber mines was given by Griffith in 1848 from the
/ R& ?: D* }# Q! w7 e7 \+ L/ i" o“Hookhoom” Valley. Some pits, he observed were up to forth feet deep.
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* q" I( o. W. \* a8 _5 xIn 1885, the British invaded and conquered Upper Burma deposing and sent into exile the Burmese Royal Family to
}7 d& \6 h# {7 [0 a6 \3 \India . Burma became an annex of India . With the arrival of the British the main trading route in amber went south to
! h; m6 B. ^2 w- \7 D" AMandalay rather than to China . The Geological Survey of India sent Dr. Fritz Noetling to evaluate the resources of
5 ^) S" L/ y% c/ O X$ M+ X/ h. Anorthern Burma in 1892. Amber recovered from the Hukwang Valley was examined by Otto Helm who gave the name 6 I$ x9 x. F% r8 ^- x! {, x1 Z! q
burmite to the amber from that area. Noetling also noted the presence of insects in amber thought to be from the area in
& [6 T2 ]2 s- D+ @9 e' y& j o1893. : O, J! L9 C. Y: h% L
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In the first half of the twentieth century, scientific study and production continues until 1939. With the advent of the 7 j8 E0 | |: f+ g
Second World War, both the production and study languished until the 1990’s. This was due not only to the war but also
2 r8 e& L+ p, O9 Z8 E; G; einternal turmoil within Burma following its independence from Britain in 1947. 0 [. X- F5 }! D- z
& v) h- z$ y- jCockerell (1917) published the first scientific paper on insect inclusions in burmite. He considered burmite to be possibly * i. }/ g& L& ~" G
Upper Cretaceous in age. The Indian Geological Survey published yearly production figures from the Myitkyina District 1 e0 c# F1 X* E! w
from 1898 until 1940. During this period a total of approximately 82,656 kilograms of amber were produced from the
; D7 u+ i* A" e; gHukawng Valley . Scientific papers during this period include work by Stuart (1922), Cocherell (1922), Williamson " c4 i6 V V6 f8 E% b6 T$ W( u
(1932), and Chibber (1934). These authors concluded that the age of burmite was Eocene or about the same age as 5 c7 K3 w6 O4 p8 |
Baltic amber. This interpretation was based on a single observation of limestone debris dug from one of the amber pits. ; D! J7 J P# d+ o. J9 b: f
Chibber (1934) contains the most detailed report of the amber mines in the Hukawng Valley during this period. 2 G3 o* R+ Z9 r6 h2 Z6 Y- b
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During the Second World War there was much fighting in the Hukwang Valley between the advancing allies and the
2 o# ?3 [2 @, Z. R8 q- uJapanese Army culminating in the fierce battle for Myitkyina the capital of Kachin State in 1944. The war also saw the & ^4 o, V% c3 L _& J
construction of the Ledo Road through the Hukwang Valley from Ledo in India to Mytiknina to Lashio where it connected % E: k W' A" d! O" f2 X+ l" m
up with the Burma Road to China . This road provided a back door to supply China with desperately needed war
4 C& y6 E: ?0 ]: Wmaterial.
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; v4 f+ g3 O1 e0 k) OSince independence, Burma has been racked by internal insurgencies including fighting between the Kachin 7 p/ K) p0 `4 t
Independence Army (KIA) and the government. It was not until the 1990’s that a peace treaty was signed and limited
+ Z; }% y$ Y! H7 K% {+ F, jaccess to the amber mine was possible. In 1989, the county was renamed Myanmar , which was the original Burmese
. t2 o z# t( y( U7 O9 wname of the country. 5 b! e4 \5 m% ~) N6 ?3 n. t
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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 4 F* i5 z7 u4 J0 D
Grimaldi comments in his book on amber published in 1996, “Today, burmite has almost legendary appeal, in part $ e. B! G5 \- }2 f/ H0 b/ K% w
because the deposits are no longer mined and the supply is generally not available.”
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% F7 X O! `% L2 O- ~Leeward Capital Corp., a Canadian Mining company began exploration in 1996 in northern Kachin State for gold and
1 B3 o" c$ G6 ~8 x' _platinum. With the collapse of the junior mining market due to the Bre-X Scandal in Indonesia and the drop in the gold
# M# P! ~1 g7 B$ Hprice, this exploration ceased due to the lack of funding. In 1999, Leeward began to evaluate the possibility of reopening 3 r" ~- Z* Q! z1 B. [. v& B
the amber mines in the Hukwang Valley . Limited production was achieved in 2000, and is currently about 500 kg per . c3 M. t2 ^- `
year. The initial 100 kg gathered in the first two years was sent to Dr. Grimaldi at the American Museum of Natural
: Z; w! ^& j4 y; qHistory in New York for scientific study. In 2000, Zherikjin and Ross of the Natural History Museum , London published a
5 l4 `; U" O1 r; jscientific paper on burmite in which they determined a Cretaceous age for burmite. Grimaldi et al (2002) published a
) a# C2 K, z7 K/ V. yscientific paper confirming the age of burmite as Cretaceous. Also in 2002, Cruichshank and U Ko Ko published a
; ]; S' t9 f# N& S* @description of the amber mines in the Hukwang Valley giving the amber a an Albian or uppermost Lower Cretaceous
/ Y* ?1 f- H6 ?+ F# |9 Qage. This dates burmite as at between 100,000,000 and 110,000,000 years old. Burmite is thus the oldest locality from R$ g* A3 T* a' _9 k
which commercial deposits of amber can be mined. Leeward remains the sole exporter of this rare and precious amber.
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4 q; A+ t* G- l$ ISince scientific study of burmite began, there have been numerous scientific papers on the unique biota found in , e' i# r, {$ P( c3 T- W/ L
burmite. This book illustrates the diversity of animal and plant life preserved in this ancient amber.
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