ژئوشیمی و کانی شناسی کانسار سنگ اهن سنگان خراسان

The Sangan Iron orc deposit is locatCd 2~R km 'IIUl1 caSI of Ma ~ hhad . The magnetilc ore hotly is 4.2km long and : to Jt)(J meter witle. The mlnerahl.allon is hos lcd hy carhonate of upper Juras!'>ic-iowcr Crctat:cClu .... Magncllte and a:-.suciaH;d mlnera" MC analYl.ctl hy elcctron mlcro'cope. The Ti. Mn. Ni, Cr. P and Mg cnnlcnt of magnetitc arc very lnw. The MgO con tent of magnctJlc in Dartlway, Baghian :md C- north i:-. hctwcen 1 to .!'I pcrcent. Parage n c~j!; of magnclilc III A tlcpu:-.it Me .1Otlrllditc, hcdcnhcrgi lc , ca ld le , and a rare amphibole such a .... Icrru - paragasitic hornhlcndc. in the A, Band C t1eposit:-. arc rcrro - acl innlitc, calcilc ami Fe-rich chlorite such as ripitlolite, in Dartlway dcpnsil :HC phlogopile, siderite and garnet and for 8aghain deposit arc dolomite, phlogopite and cinchlorc. Thc ICmperaturc of fo rmation of A deposit wa:. higher than 400 ha,cd on Ihc m;ncr:t1ugy and Ihc inlrUSI;vc rock!'>. The temperature of formation of B deposit were calculated JO() ba<;ed on the composition o f chlori te. The Fe-rich magmatic fluid a~ociated with the quartz monzonite (ou tcrop at A' ) was reacted with the dolomitic limcsHmc and formed the magnclitc ska rn. Ch lorine rich amphibole may i ndica te that iron were carried as chlorine compicxC1> In the fluid.