Preliminary geologic map of the Byron Hot Springs Quadrangle, Alameda and Contra Costa counties, California

1980 ◽  
Author(s):  
T.W. Dibblee
Keyword(s):  
Hot Springs ◽  
Geologic Map

scholarly journals Hydrogeochemistry of Natar and Cisarua Hot springs in South Lampung, Indonesia

2019 ◽  
Vol 4 (3) ◽  
pp. 178
Author(s):  
Mochamad Iqbal ◽  
Bella Restu Juliarka ◽  
Wijayanti Ashuri ◽  
Bilal Al Farishi
Keyword(s):  
Metamorphic Rock ◽  
Meteoric Water ◽  
Hot Springs ◽  
Hot Spring ◽  
Isotope Analysis ◽  
Research Area ◽  
Geothermal System ◽  
13C Isotope ◽  
Geologic Map ◽  
Quaternary Volcanic Rock

Natar Hot Spring is one of the geothermal manifestations that is located in Lampung Province, Indonesia. About 6 km to the east, another hot spring appears with temperature around 40°C with neutral pH called Cisarua Hot Spring. The Natar Hot Spring itself having temperature 47-54°C with 6.23 pH. Based on the geologic map, the appearance of these hot spring is caused by Lampung-Panjang Fault which trending northwest-southeast. Morphology of the research area is showing a flat terrain topography which composed of Quaternary volcanic rock and metamorphic rock in the basement. The nearest volcano that expected to be the heat source of the geothermal system is the Quaternary extinct volcano called Mt. Betung which is located about 15 km to the southwest. The aim of the study is to analyze the geochemistry of the manifestations and calculate the reservoir temperature. Geochemistry analysis result shows both manifestations are bicarbonate which is formed as a steam-heated water or steam condensates. Geothermometer calculation shows that the geothermal reservoir has temperature 150-160°C with approximately 300 m in depth. All manifestations are originated from meteoric water according to stable isotope analysis D and δ18O data and interacting with carbonate-metamorphic rock beneath the surface based on 13C isotope value. A further geophysics study is needed to determine where the heat comes from.

scholarly journals Digital geologic map and geochronologic, geochemical and geothermal database of the south-eastern part of the Sierra Madre Occidental, Mexico

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Luca Ferrari ◽  
Juan Carlos Castillo-Reynoso ◽  
Teresa Orozco-Esquivel ◽  
Argelia Silva-Fragoso
Keyword(s):  
Hot Springs ◽  
Google Earth ◽  
Geological Mapping ◽  
Tectonic Structures ◽  
Southeastern Part ◽  
Sierra Madre Occidental ◽  
Digital Elevation ◽  
Sierra Madre ◽  
Geologic Map ◽  
Geological Units

We present a first interactive digital geological map of the southeastern part of the Sierra Madre Occidental at its borders with the Mesa Central. The area of the geological cartography covers approximately 120,000 km2 that includes part of the states of Jalisco, Zacatecas, Aguascalientes and Durango. The geology has been compiled in ArcGIS through an interpretation of all the information available in the literature, integrated with our own geological mapping. Published maps were georeferenced and, as far as possible, the traces of the geologic limits and structures with a clear morphological expression were refined using digital elevation models and satellite images available in Google Earth. The map includes 15 geological units and the main tectonic structures. The informal geological units used in the map are chronostratigraphic and lithological and are designed to highlight the main magmatic episodes that shaped the region. The age assignment for each unit has been compared with a geochronological database that includes 304 ages. The lithological classification of each polygon has been compared for consistency with a geochemical database compiled from the literature that includes 313 samples. We also added a layer of information with the main hot springs of the region and their temperature.

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