From 2005 to 2007, dozens of weathered granite diorite ultra-poor magnetite were found in Baitugang-Nanhedian area in Nanzhao town of Henan Province.

• 2007年，在河南省南召县白土岗-南河店一带发现数十个风化花岗闪长岩型超贫磁铁矿床。