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ZhangDY,YaoZY,WangTG,WangCS,XiaoE.MetallogenicgeologicalsettingandmajormineralizationtypesintheLachlanfoldbelt,SoutheastAustralia.
The Lachlan Fold Belt (LFB) of eastern Australia is
composed of deformed deep-marine sedimentary rocks (quartz-rich turbidites),
cherts, and mafic volcanic rocks of Cambrian- Devonian period as well as younger
continental cover sequences. In the southeast-verging accretionary process of
the Australia plate, a lot of gold and polymetallic deposits were formed in
LFB, particularly the orogenic lode gold in central Victoria, which represents
a major gold province with a total output of 2500t of gold, or over 2% of total
world output. In addition to gold, the mineralizations of Cu, Pb, Zn, W, Sn and
Mo are also well developed in this belt. Five distinctive mteallogenic types
have been recognized, and the mineralizations are closely related to the
special geological setting. In this paper, wide range of opinions, descriptions
and relevant data concerning the Lachlan Fold Belt are meticulously put to
order, compared, analyzed and summarized, and metallogenic geological settings
of gold and polymetallic deposits, major mineralization types and their
geological features are discussed in detail.