New Find of Kimberlitic Rocks in Andhra Pradesh, Near Maddur, Mahaboobnagar District

Rocks of kimberlitic affinity hitherto not recorded are recognized near Maddur, Mahaboobnagar district, Andhra Pradesh. These are identified as olivine lamproites based on the paucity of garnet and picro-ilmenite. However, major element data have similarity with lamproitcs of Western Australia. Petrography is similar to pipe No.5 of Wajrakarur. K₂O is, however, less. The kimberlitic rocks are located in the area intersected by NE-SW (Major) and NW-SE (Intermediate) lineaments and form the northern cluster of kimberlites in Andhra Pradesh. This new location of a kimberlitic province has widened the scope for diamond prospecting in Andhra Pradesh.