Abstract

• The study area is located about 1.5km northeast of Ye-ngan Township, Shan State ( South).It is also situated within Latitude21 12 30 N to21 14 30 N and longitudue96 31 30 E to 91 34 00E.It covers about 4.6 kilometers. The area is covered by the Paleozoic units namely, Lokepyin Formation, Wunbye Formation, Nan-on Formation, and Tanshauk member of the Pindaya Group of Ordovician age, the Linwe Formation of the Mibayataung Group of Silurian age, the Thitsipin Formation of Permian age, and the Nwabangyi Dolomite Formation of Early Triassic age. Structurally, the area is significant due to the recognition of genesis of fault system which is previously not known from the area. The present study provides reevaluation of the structural geology of the research area. Resent study in the Linwe area, has significantly improved our knowledge of recognizing a lead mineralization in phacoidal limestone of Linwe Formation (Early Silurian) mainly occurred in nearly NW-SE trending fault zone. Linwe lead occurrence (latitude 21 13 16 N longitude 96 32 23E) is situated at half mile northwest of Linwe monastery. The mineralization of the Linwe area is found to be definitely structurally controlled. The galena is observed to have mostly occurred in fault with brecciated zone. In the alteration map by ASTER data, many cyan tint pixels (alterations) are observed which the evidences of possible locations of mineralization area. The common wall rock alteration of Linwe lead mineralization may be dolomitization and the formation of sanded dolomite based on the alteration map by using aster and Landset 8 images. Most of the Linwe ore bodies have been followig NW-SE trending faulted stream that is pre mineralization fault. On the surface, the mineralization can be followed the brecciated zone.Styles of mineralization occur as fracture filling and solution collapse breccia. Lead mineralization fill in cracks of deformed calcite crystals. Texture of lead sulphide minerals are mostly related to open-space filling of breccia’s and fractures. This fault zone and lead mineralizatioin were previously mapped and designated by Tun Naing Zaw et.al., (2017).Lead deposit in the Linwe Formation is hosted by sedimentary rock deposited during the later stage of at least two overprinting extensional events.Hydrothermal activity and alteration also acted as a heterogeneity focusing of dilational deforation and final stage of mineralization.Reactivated fault thereby accounting for the longevity of the hydrothermal system responsible for the alteration and mineralization at Linwe Formation.Analysis of the kinematic controls on lead mineralization in Linwe Formation is structurally controlled may enable other prospective structures in the near Linwe area to be identified.Need to seek possible means and ways for further exploration of Pb mineral deposits in the Linwe area.