Research was conducted to identify the rocks that were taken in and around the Tehoru hot springs, Central Maluku regency. The rock samples were analyzed using petrography. The results of sample analysis identifies a sinter travertine deposition dominated by the presence of the mineral calcium carbonate (CaCO3) or calcite in the area around the Tehoru hot springs. Petrographic analysis shows that calcite incision initially preparing amorphous precipitated sinter travertine has been transformed into a microcrystalline calcite size is less than 0.01 mm. The sinter travertine also contains several other minerals were observed through an incision petrographic, ie anhydrite, iron oxides and quartz fragments. The deposition of sinter travelin form of mineral calcium carbonate or calcite, which is dominant around the Tehoru hot springs leave a good impact on the health of which is to improve the performance and efficiency of the body for its users, as a supplier of stimuli nerve from one cell to another and can kill certain germs or bacteria that attack the skin. In addition, sediment sinter travelin soluble in water will soon be absorbed by the roots of plants, because these substances are necessary for plant growth to be around the hot springs.

Keywords: alteration minerals, petrography, travelin sinter, calcium carbonate.

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