GEOLOGIC STRUCTURE OF THE MUKODEK GOLD FIELD (northern Transbaikalia) AND SOURCES OF MATTER (Pb-Pb and Sm-Nd data)

2018 ◽  
Keyword(s):  
Geologic Structure ◽  
Northern Transbaikalia

Geologic structure of the Mukodek gold field (northern Transbaikalia) and sources of matter (Pb-Pb and Sm-Nd data)

2018 ◽  
Vol 59 (9) ◽  
pp. 1078-1086 ◽  
Author(s):  
V.A. Vanin ◽  
A.V. Chugaev ◽  
E.I. Demonterova ◽  
D.P. Gladkochub ◽  
A.M. Mazukabzov
Keyword(s):  
Geologic Structure ◽  
Northern Transbaikalia

Geologic Structure, Mineralogy, and Geochemistry of the Nerunda Gold Ore Field (Northern Transbaikalia)

2021 ◽  
Vol 62 (10) ◽  
pp. 1139-1156
Author(s):  
I.V. Chetvertakov ◽  
V.A. Vanin ◽  
I.A. Demin
Keyword(s):  
Early Stage ◽  
Gold Deposits ◽  
Geologic Structure ◽  
Gold Ore ◽  
Northern Transbaikalia ◽  
Ore Mineralization ◽  
Two Stages ◽  
Geochemical Studies ◽  
Ore District ◽  
Erosion Zone

Abstract —We consider the geologic structure of the Nerunda gold ore field located in the Nerunda–Mama ore district in northern Transbaikalia. Gold–quartz low-sulfide formation and ore-bearing carbonate-terrigenous strata and intrusive complexes are briefly described. An ore complex of beresite–listvenite metasomatites hosting carbonate–quartz veins and vein–veinlet zones is characterized. Two stages of ore formation have been recognized. Anomalous geochemical associations and the composition of ore mineralization typical of these stages have been established. Mineralogical and geochemical studies of gold-bearing metasomatites of the Nerunda ore field were carried out. The known geochemical and mineralogical search criteria used for the assessment of the erosion zone level of gold deposits were applied to the geologic conditions of the Nerunda ore field and the Nerunda–Mama gold ore district as a whole. The emphasis was made on the express assessment of the erosion zone level at the early stage of prospecting. We draw a conclusion about the gold potential of the poorly studied ore objects at depth and give guidelines for the following geological prospecting.

PEMETAAN POTENSI MATAAIR DI PULAU BALI

2018 ◽  
Vol 4 (2) ◽  
Author(s):  
Noorhadi Rahardjo
Keyword(s):  
Spatial Analysis ◽  
Volcanic Rock ◽  
Urban Area ◽  
Geologic Structure ◽  
High Discharge ◽  
Rock Formation ◽  
Domestic Use

There are three objectives of this research. First, to map springs location, second to know spring characteristic and third to calculat springs potency for domestic use. To reach these aims, springs location were plotted on map base on its coordinate. Springs characteristic were analysed descriptively by spatial analysis base on geologic, geomorphologic and hydrogeologic conditions. Springs potency were calculated base on its discharge, whereas domestic use was determined 60 l/person/day for rural and 120 l/person/day for urban area. The study shows, that springs distribution in Bali Island are not homogeny Springs appearance were controlled by geologic structure as fault and rock contact. The differences of discharge also depend on the structure. Contact between volcanic rock (tuff and lahar) from Buyan-Bratan-Batur Formations with another rock formation in its surrounding result many springs appereance with high discharge. Beside that, orohydrology properties of Agung Mount as strato volcanic result springs belt in a certain elevation and each slope changing. Base on calculation, springs potency in Bali Island are 628.800 m3/month,whereas the domestic use is 9.079.990 m3/month. So, the springs potency is just 6,9% from domestic use in Bali Island.Key words : springs potency, springs distribution, springs characteristic

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