Manganese in Trenggalek and surrounding area.

Manganese at this time often was looked for by the person because this mineral was the mineral that often was utilised for the iron raw material and the steel. This together with even more of them the development that often needed this steel material

In the Trenggalek territory and surrounding area often was encountered the mineral mangan but this mineral many that were met in the Perhutani land, so as to still could not be mined optimally. This happened because of the process of getting permission for the exploitation activity in the Perhutani land took up a long time and the expensive cost. Because of the process of long permission finally people mined manganese ore this illegally/without permission.

In fact plenty of investors who came and were interested to exploitation this mineral, but because of his process of taking up a long time finally had retreated because of the problem of permission in this land.
The Manganese trap in this area most was received inside in the gap/the cave to the limestone, so as the process of mining him really was difficult. The community that mined mangan this like the gold miner who made caves. The trap manganese will be increasingly big if being found in gap/the big limestone crack.

In the Trenggalek area and Tulungagung manganese many in the mine around the Gandusari Village, Sukorame, Gebang, Sukoharjo and the heritage.

The type of manganese in Trenggalek and surrounding area

The mineral mangaan consist of pirolusit, psilomelan, manganite, non kristalin, was black – black brownish – black greyish, unified. The occurrence manganese are crack of filler, poreos, cavities and the between layered of rock, partly gave the impression breciasi with soft veins of quartz, calsite, limonite and geotite.
The most important body of rock was the limestone, partly changed marble was reddish, whereas the other of body rock was chert that experienced concretion and the mineral manganese grew with the structure dendritik

In the field appeared of manganese gradually was seen like gradations that is from the limestone – chert – manganese.
Moreover manganese also was gotten as results of enrichment and weathering of rock manganese mineralisation. The mineral manganese as results of this enrichment was found took the form of the concretion or boulders.
From results of observation in the field, that bedrock in this area was cloritisation of breccia polimic.