Mineral investigations in northeastern Thailand

Abstract

Introduction-______________________________________ Scope of report.________________________________ Previous investigations __________________________ Background and objectives of present investigation. Methods of operation.__________________________ Geochemical and geophysical field procedures. _____ Traverse-line preparation ____________________ Geochemical soil surveys___________________ Magnetic surveys.__________________________ Electrical surveys.__________________________ Resistivity. ____________________________ Self-potential__ _-_______---____-___--_ Electromagnetic ________________________ Induced polarization ____________________ Acknowledgments__ ___________________________ Geography _ ______________________________________ Topography ________________________________ Climate and vegetation__________________________ Proposed Pa Mong dam___._____________________ Regional geology___________________________________ Sedimentary and metamorphic rocks---______-._ Devonian or older rocks____________________ Devonian and lower Carboniferous rocks_____ Carboniferous and Lower Permian rocks_______ Triassic to Cretaceous rocks (Khorat Series) Quaternary alluvium and laterite--________-__ Igneous rocks__________________________________ Structure______________________________________ Metamorphism ________ _ ______________________ Mineral deposits._______________________________ Regional magnetic information. ______________________ Aeromagnetic surveys.__________________________ Magnetic interpretation-_ _ ______________________ Geochemical reconnaissance._________________________ Sampling and analysis_________________________ Geochemical background-_______________________ Geochemical anomalies._________________________ Mineral prospects_________________________________ Base-metal prospects..__________________________ Copper-Iead-zinc deposits.___________________ Phu Han-Phu Sang prospect. ____________ Phu Hin Lek Fai area_--_-_--__--_-----_ Phu Thong Daeng deposit. ________--__ Phu Poon-Phu Pa Phai prospect._________ Lead-zinc deposits. _________________________ Phu Khum 1 (Ban Khok Mon) prospect_ Phu Khum 2 (Ban Nong Ya Sai) prospect-Iron prospects..________________________________ Phu Lek (Chiengkarn) deposit______________ Phu Yang deposit_____________________ Phu Hia deposit.___________________________ Phu Ang deposit__________________________ 10. Summary of data used for calculating proven and probable ore, Phu Ang iron deposit. _ _ _ _ _ 11. Summary of drilling data, Ban Kham Duang gold prospect-__________________________ 12. Summary of analyses of Wang Saphung gypsum intersections-________________________ MINERAL INVESTIGATIONS IN NORTHEASTERN THAILAND

Characterization of sulfate mineral deposits in central Thailand

“…Calcium sulfate deposits (gypsum and anhydrite) of Paleozoic age are distributed around the Loei–Wang Saphung and Nakhon Sawan areas of mainland Thailand (e.g. Chonglakmani, Fontaine, & Vachard, ; El Tabakh & Utha‐Aroon, ; Jacobson et al, ; Ueno & Charoentitirat, ). Among these, the sulfate deposits in the Loei–Wang Saphung area of northeast Thailand have been investigated in drilled cores (Surakotra, ; Surakotra, Pisutha‐Arnond, & Warren, ; Utha‐Aroon & Surinkum, ).…”

Middle Carboniferous cephalopods from Loei area, northern Thailand

“…The authors mentioned many previous studies, as mentioned above, however, there were no description about geological setting around Loei at all. Jacobson et al (1969) proposed the geological data in northern part of Loei-city, and prepared the geological map and the stratigraphic chart (Table 1) (Saurin, 1963).…”

Petrochemistry of Granitoids Along the Loei Fold Belt, Northeastern Thailand

“…The district is underlain predominantly by Paleozoic rocks of the Indochina Block beneath the Khorat Group where deformed sedimentary and volcanic rocks of Silurian, Devonian, Carboniferous, and Permian ages were intruded by Triassic‐Jurassic calc‐alkaline plutons that are associated with Fe‐Cu and Au‐Ag mineralization. The LFB hosts a variety of mineral deposits including the Cu‐Au skarn deposits, Au skarn deposit, epithermal Au deposit, and epithermal Sb‐Au deposit in the area around Loei, Phetchabun, Nakhon Sawan, Lobburi, and Chachoengsao (Jacobson et al, ; Müller, ; Rodmanee, ; Kamvong & Zaw, ; Salam, ; Paipana, ; Zaw et al, ). The LFB extends northwards into Lao People's Democratic Republic.…”