





an 



Mineralogical Description of the Island of Banka. 99 



fragments, and those particularly taken from the aqueducts, were 

 more purely breccias, consisting of coarse siliceous fragments 

 united by a ferruginous cement ; to many of these the ore of tin 

 was still found adhering in very minute particles. From Belinyu 

 to Pandjie, the country is on the whole, alluvial. I observed one 

 granite rock projecting from a branch of the river ; the stones 

 which have been collected by the inhabitants of Pandjie for vari- 

 ous purposes, are explanatory of those found in the neighborhood; 

 they consisted of fragments of granite and of red ironstone. The 

 mines of Pandjie were situated towards the hill of that name, 

 which has been marked on the map. 



That part of this peninsula which, bounding the bay in the 

 east, stretches from the stockade and environs of Belinyu and 

 Pandjie towards the foot of the Gunung Marass, is alluvial. The 

 stockade of Lumut is situated in it, a considerable distance up 

 the river of that name and near the eastern confines of this tract ; 

 in proceeding to it from the usual landing place, the road passes 

 several elevations which here bound the alluvial plain. These 

 consist of red ironstone in separate rocks and in large veins cov- 

 ering extensive surfaces. Loose fragments are also dispersed on 

 the road. Those rocks which I examined more minutely and 

 from w 



Jebus 



jnst mentioned. 



They are mostly cellular, and the fracture is partly ochreous 

 and partly metallic: the separate particles of some of them are 

 very ponderous. 



These hills formerly contained st ta of ore which has been 

 successively extracted ; on approaching the stockade the remains 

 °f many of the former mines are passed. Here the surface is 

 covered with mixed stones ; fragments of granite, breccia and 

 coarse sand, similar to those found at the aqueducts, are strewed 

 on the sides of the road in every direction. From the stockade 

 °f Lumut the district of the mines stretche northward, inclining 

 to the west until it meets that of Pandjie and Belinyu. 



I commenced the examination of the mines of Lumut about 

 nju f a mile to the north of the stockade, at one of the small mines 

 which had lately been relinquished. The process had been ear- 

 ned on as usual on a slightly inclining ground. A vertical sec- 

 tj °" exposed the strata of the hill, and the extensive surface 

 below contained the remains of many former works. 



On the side of the hill I noticed 



i. (Layer) soil.— 2. Sand.— 3. Coarse sand, < r.sisting of large 



particles of quartz. 1 Clay of a reddish color. — ~y. Coarse sand. 



b. Clay. — 7. Extremity of the layer from which the ore had been 

 extracted : the fragments which composed it were chiefly siliceous, 

 °f the mixed kind above described, consisting nearly of equal pro- 

 Portions of quartz and feldspar combined into a variegated mass. 



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