186 BROWN ft HERON. GEOLOGY AND ORE DEPOSITS OF TAVOY. 



near Kadwc and north of Pagaye. The rich veins of the Rangoon 

 Mining Company's area south of Pagaye arc in sedimentaries but 

 indicate the extension of this lobe still farther to the south-east, 

 doubtless a comparatively short distance below surface. The 

 southern area has near its centre at Paungdaw an extensive capping 

 of Mergui rocks rising from the low ground to a height of nearly 

 4,000 feet and resting on the flat domed top of the granite in the 

 Paungdaw mining area, hi a similar fashion to the Talaingya 

 lobe just mentioned, this intrusion shows its subterranean presence 

 in small outcrops of granite through the Merguis to the north-west, 

 near Hennyingvi and Thitkado, between the two lobes of the 

 northern part of the Central granite area, and also to the south-cast 

 near Yesin Taung (3,448). 



It is worthy of note that the great majority of productive mines 

 in Tavoy are on the Talaingya lobe of the northern portion (Byauk- 

 chaung, Bolintaung, Kyaukanya, Kadwe, Yewaing. Pagaye), on the 

 northern end of the southern portion, called the Central Eange, 

 (Thitkado, Hermyingyi, Taungpila, Thingandon. Wagon) or around 

 the Paungdaw capping. 



(c) The Mintha intrusion.— This runs parallel with the coast 

 into the Mergui district to the south to beyond Mergui town, and 

 between it and the sea a narrow coastal plain of Mergui sedimen- 

 taries intervenes, wherein are numerous smaller bosses of granite 

 and a considerable development of tourmaline-pegmatite, a rock- 

 distinct from the granite. To the east is a granite area on the 

 Tavoy-Mergui border, which appears to lie in line with the south- 

 ward extension of the Central intrusion, but is divided from the 

 Mintha intrusion only by a narrow band of Mergui sedimentaries 

 along the valley of the Pechaung, a thin covering over the under- 

 lying granite through which the latter appears in several places. 



(/) The Amya intrusion. — This is a large mass of granite between 

 the Great Tenasserim and the Banrivers. Owing to its remoteness 

 and difficulty of access it has been examined only in hurried traverses 

 by members of the party and its boundaries as shown are only 

 approximations. 



The granite varies considerably in grain and texture but is of very 



uniform niineralogical composition all over 



the district and in fact wherever observed, 



as far north as the Yamethin district and south to the farthest 



extremity of Burma. 



