S\u1eaft l\u00e0 t\u1eeb qu\u1eb7ng s\u1eaft tinh luy\u1ec7n m\u00e0 th\u00e0nh. T heo tr\u00ecnh \u0111\u1ed9 luy\u1ec7n kim hi\u1ec7n nay, h\u00e0m l\u01b0\u1ee3ng s\u1eaft trong qu\u1eb7ng s\u1eaft t\u1ed1i thi\u1ec3u ph\u1ea3i \u0111\u1ea1t m\u1ee9c 20 – 30%. T rong v\u1ecf Tr\u00e1i \u0110\u1ea5t h\u00e0m l\u01b0\u1ee3ng s\u1eaft kho\u1ea3ng 5%, \u0111\u00f3 l\u00e0 con s\u1ed1 b\u00ecnh qu\u00e2n thu \u0111\u01b0\u1ee3c qua ph\u00e2n t\u00edch ho\u00e1 h\u1ecdc \u0111\u1ed1i v\u1edbi nham th\u1ea1ch c\u1ea5u t\u1ea1o n\u00ean v\u1ecf T r\u00e1i \u0110\u1ea5t. N\u1ebfu c\u0103n c\u1ee9 th\u00e0nh ph\u1ea7n ho\u00e1 h\u1ecdc c\u1ee7a c\u00e1c v\u1eabn th\u1ea1ch r\u01a1i xu\u1ed1ng T r\u00e1i \u0110\u1ea5t m\u00e0 suy \u0111o\u00e1n th\u00ec s\u1eaft trong to\u00e0n b\u1ed9 T r\u00e1i \u0110\u1ea5t chi\u1ebfm kho\u1ea3ng 35%. T rong l\u00f2ng \u0111\u1ea5t s\u1eaft r\u1ea5t nhi\u1ec1u, v\u1eadt ch\u1ea5t c\u1ea5u t\u1ea1o n\u00ean nh\u00e2n T r\u00e1i \u0110\u1ea5t g\u1ea7n nh\u01b0 to\u00e0n b\u1ed9 l\u00e0 nguy\u00ean t\u1ed1 s\u1eaft. Nh\u01b0ng v\u00ec s\u1ef1 h\u1ea1n ch\u1ebf c\u1ee7a k\u1ef9 thu\u1eadt khai th\u00e1c, cho n\u00ean ch\u00fang ta kh\u00f4ng th\u1ec3 l\u1ee3i d\u1ee5ng h\u1ebft s\u1ed1 s\u1eaft n\u00e0y. Tr\u01b0\u1edbc m\u1eaft ch\u1ec9 c\u00f3 th\u1ec3 khai th\u00e1c nh\u1eefng m\u1ecf s\u1eaft c\u1ea1n g\u1ea7n v\u1edbi m\u1eb7t \u0111\u1ea5t.<\/p>\n\n\n\n
H\u00e0m l\u01b0\u1ee3ng b\u00ecnh qu\u00e2n s\u1eaft trong v\u1ecf T r\u00e1i \u0110\u1ea5t kh\u00f4ng cao. Nguy\u00ean t\u1ed1 s\u1eaft nh\u1ea5t \u0111\u1ecbnh s\u1ebd t\u1eadp trung \u1edf m\u1ed9t ch\u1ed7 n\u00e0o \u0111\u00f3 m\u1edbi c\u00f3 th\u1ec3 h\u00ecnh th\u00e0nh m\u1ecf s\u1eaft. V\u1eady s\u1eaft t\u1eadp trung th\u00e0nh m\u1ecf nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n\n\n\n
Nham th\u1ea1ch ph\u00e2n t\u00e1n kh\u1eafp n\u01a1i \u0111\u1ec1u ch\u1ee9a s\u1eaft, qua t\u00e1c d\u1ee5ng m\u01b0a n\u1eafng l\u00e2u ng\u00e0y, ch\u00fang b\u1ecb phong ho\u00e1 tan r\u00e3, s\u1eaft trong \u0111\u00f3 b\u1ecb oxy ho\u00e1, oxit s\u1eaft n\u00e0y tan ra ho\u1eb7c tr\u00f4i n\u1ed5i trong n\u01b0\u1edbc b\u1ecb n\u01b0\u1edbc cu\u1ed1n tr\u00f4i \u0111\u1ebfn t\u1eadp trung l\u1ea1i m\u1ed9t ch\u1ed7, d\u1ea7n d\u1ea7n tr\u1ea7m t\u00edch l\u1ea1i d\u01b0\u1edbi \u0111\u1ea5t m\u00e0 h\u00ecnh th\u00e0nh nh\u1eefng v\u1ec9a qu\u1eb7ng t\u1eadp trung. T rong qu\u00e1 tr\u00ecnh t\u00edch t\u1ee5, nhi\u1ec1u sinh v\u1eadt, nh\u01b0 m\u1ed9t s\u1ed1 vi khu\u1ea9n n\u00e0o \u0111\u00f3 \u0111\u00e3 c\u00f3 t\u00e1c d\u1ee5ng t\u00edch c\u1ef1c. 90% c\u00e1c m\u1ecf s\u1eaft l\u1edbn tr\u00ean th\u1ebf gi\u1edbi \u0111\u1ec1u th\u00f4ng qua qu\u00e1 tr\u00ecnh t\u00edch t\u1ee5 nh\u01b0 th\u1ebf, ch\u1ee7 y\u1ebfu l\u00e0 \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh \u1edf th\u1eddi k\u1ef3 l\u1ecbch s\u1eed \u0111\u1ecba ch\u1ea5t c\u00e1ch \u0111\u00e2y 500 -600 tri\u1ec7u n\u0103m tr\u01b0\u1edbc. Sau khi m\u1ecf s\u1eaft h\u00ecnh th\u00e0nh, qua nhi\u1ec1u l\u1ea7n bi\u1ebfn \u0111\u1ed5i, v\u00ed d\u1ee5 t\u00e1c d\u1ee5ng c\u1ee7a \u00e1p su\u1ea5t cao v\u00e0 nhi\u1ec7t \u0111\u1ed9 cao trong v\u1ecf T r\u00e1i \u0110\u1ea5t, c\u00f3 l\u00fac c\u00f2n c\u00f3 s\u1ef1 tham gia c\u1ee7a ch\u1ea5t l\u1ecfng n\u00f3ng bao g\u1ed3m nhi\u1ec1u ch\u1ea5t kh\u00e1c, khi\u1ebfn cho qu\u1eb7ng s\u1eaft tr\u1ea7m t\u00edch l\u1ea1i, ho\u1eb7c nh\u1eefng nham th\u1ea1ch ch\u1ee9a nhi\u1ec1u s\u1eaft bi\u1ebfn ch\u1ea5t m\u00e0 th\u00e0nh qu\u1eb7ng v\u1edbi quy m\u00f4 l\u1edbn nh\u01b0 ng\u00e0y nay. Nh\u1eefng m\u1ecf s\u1eaft n\u00e0y l\u1ea1i th\u00f4ng qua phong ho\u00e1, d\u1ea7n d\u1ea7n t\u1eadp trung l\u1ea1i t\u1ea1o n\u00ean nh\u1eefng m\u1ecf s\u1eaft c\u00f3 h\u00e0m l\u01b0\u1ee3ng cao.<\/p>\n\n\n\n
C\u00f2n c\u00f3 m\u1ed9t s\u1ed1 m\u1ecf s\u1eaft l\u00e0 do nham t\u01b0\u01a1ng ho\u1ea1t \u0111\u1ed9ng c\u1ea5u t\u1ea1o n\u00ean. Nham t\u01b0\u01a1ng khi ng\u01b0ng k\u1ebft d\u01b0\u1edbi m\u1eb7t \u0111\u1ea5t ho\u1eb7c g\u1ea7n m\u1eb7t \u0111\u1ea5t, c\u00f3 th\u1ec3 ph\u00e2n ly ra qu\u1eb7ng s\u1eaft v\u00e0 t\u1eadp trung \u1edf nh\u1eefng ch\u1ed7 nh\u1ea5t \u0111\u1ecbnh. Khi nham t\u01b0\u01a1ng ti\u1ebfp x\u00fac v\u1edbi c\u00e1c nham th\u1ea1ch chung quanh, n\u1ebfu g\u1eb7p \u0111i\u1ec1u ki\u1ec7n th\u00edch h\u1ee3p c\u0169ng c\u00f3 th\u1ec3 t\u00e1c d\u1ee5ng l\u1eabn nhau ph\u00e1t sinh bi\u1ebfn \u0111\u1ed5i, h\u00ecnh th\u00e0nh qu\u1eb7ng s\u1eaft.<\/p>\n\n\n\n
Nh\u1eefng qu\u1eb7ng s\u1eaft ch\u1ee7 y\u1ebfu tr\u00ean th\u1ebf gi\u1edbi \u0111\u1ec1u \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh \u1edf th\u1eddi k\u1ef3 xa x\u01b0a nh\u1ea5t c\u1ee7a l\u1ecbch s\u1eed T r\u00e1i \u0110\u1ea5t. V\u00ed d\u1ee5 \u1edf \u0111\u1ea1i C\u1ed5 x\u01b0a (T h\u00e1i c\u1ed5) c\u00e1ch \u0111\u00e2y 3,5 – 2,5 t\u1ec9 n\u0103m, \u1edf \u0111\u1ea1i Nguy\u00ean c\u1ed5 (Nguy\u00ean sinh) c\u00e1ch \u0111\u00e2y 2,5 -0,6 t\u1ec9 n\u0103m v\u00e0 \u1edf k\u1ef7 \u0110\u00eav\u00f4n c\u00e1ch \u0111\u00e2y 0,41 – 0,35 t\u1ec9 n\u0103m. \u0110i\u1ec1u \u0111\u00f3 kh\u00f4ng nh\u1eefng v\u00ec s\u1ef1 h\u00ecnh th\u00e0nh qu\u1eb7ng s\u1eaft \u0111\u00f2i h\u1ecfi th\u1eddi gian d\u00e0i m\u00e0 c\u00f2n v\u00ec h\u1ed3i \u0111\u00f3 v\u1ecf T r\u00e1i \u0110\u1ea5t kh\u00e1 m\u1ecfng, n\u00ean s\u1ef1 g\u00e3y n\u1ebfp s\u00e2u v\u00e0 nhi\u1ec1u, n\u00fai l\u1eeda ho\u1ea1t \u0111\u1ed9ng nhi\u1ec1u l\u1ea7n. V\u00ec v\u1eady c\u00f9ng v\u1edbi s\u1ef1 phun ra c\u1ee7a c\u00e1c nham t\u01b0\u01a1ng, m\u1ed9t l\u01b0\u1ee3ng l\u1edbn nham t\u01b0\u01a1ng c\u00f3 h\u00e0m l\u01b0\u1ee3ng s\u1eaft cao n\u1eb1m \u1edf ph\u1ea7n tr\u00ean l\u1edbp c\u00f9i c\u0169ng \u0111\u01b0\u1ee3c phun ra. \u0110i\u1ec1u \u0111\u00f3 l\u00e0m cho m\u1ed9t l\u01b0\u1ee3ng l\u1edbn s\u1eaft n\u1eb1m s\u00e2u trong Tr\u00e1i \u0110\u1ea5t, t\u1ea1o \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 h\u00ecnh th\u00e0nh nh\u1eefng m\u1ecf s\u1eaft l\u1edbn.<\/p>\n\n\n\n
T\u00f3m l\u1ea1i, s\u1ef1 h\u00ecnh th\u00e0nh c\u00e1c m\u1ecf s\u1eaft tr\u00ean Tr\u00e1i \u0110\u1ea5t l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh di\u1ec5n bi\u1ebfn l\u00e2u d\u00e0i, tr\u1ea3i qua nh\u1eefng t\u00e1c d\u1ee5ng \u0111\u1ecba ch\u1ea5t ph\u1ee9c t\u1ea1p.<\/p>\n\n\n\n
T \u1eeb kho\u00e1: M\u1ecf s\u1eaft.<\/p>\n","protected":false},"excerpt":{"rendered":"
S\u1eaft l\u00e0 t\u1eeb qu\u1eb7ng s\u1eaft tinh luy\u1ec7n m\u00e0 th\u00e0nh. T heo tr\u00ecnh \u0111\u1ed9 luy\u1ec7n kim hi\u1ec7n nay, h\u00e0m l\u01b0\u1ee3ng s\u1eaft trong qu\u1eb7ng s\u1eaft t\u1ed1i thi\u1ec3u ph\u1ea3i \u0111\u1ea1t m\u1ee9c 20 – 30%. T rong v\u1ecf Tr\u00e1i \u0110\u1ea5t h\u00e0m l\u01b0\u1ee3ng s\u1eaft kho\u1ea3ng 5%, \u0111\u00f3 l\u00e0 con s\u1ed1 b\u00ecnh qu\u00e2n thu \u0111\u01b0\u1ee3c qua ph\u00e2n t\u00edch ho\u00e1 h\u1ecdc \u0111\u1ed1i […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,19],"tags":[],"class_list":["post-10163","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-tu-nhien"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10163","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=10163"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10163\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}