Page 130 - Handbook of Gold Exploration and Evaluation

Geology of gold ore deposits 109

Table 2.8 Gold placer districts of the world (from Wotjik, 1984)

District Rock type Age Intrusive Sedimentary
interceptors

California Slates, phyllites Upper Granodiorite Eocene
Sierra schists, hornfels Palaeozoic Diorite Pliocene
Nevada limestones Aphite Pleistocene
California Phyllite, chert Upper Granodiorite Pliocene
Oregon metavolcanics Palaeozoic Pleistocene
limestone Mesozoic
Georgia Mica-schist Precambrian Diorite Not
gneiss Palaeozoic Granite recognised
Guyana Greenstones, Precambrian Granite Not
Fr. Guyana slates, schists recognised
Surinam
Klondike Schists Precambrian Granite Eocene
Yukon, Can. Quartz Monz. Pliocene
Yukon Schists Precambrian Granite Eocene
Alaska phyllites Quartz Monz. Pliocene
Nome Schists, slates Precambrian Granite Not
Alaska phyllites Quartz Monz. recognised
Cariboo Phyllites Lower Granite Pleistocene
B.C., Can. quartzite, slate Palaeozoic Granodiorite
Choco Greenstones Palaeozoic Granite Pleistocene
Colombia, slates, phyllites Quartz Monz.
S.A. quartzite
Antiquia Slates Palaeozoic Granite Pleistocene
Colombia, schists Quartz Monz.
S.A.
Victoria Shales, slates Palaeozoic Granite Eocene to
N.S.W. graywackes Pliocene
Australia sandstones
Otago Schists Mesozoic Granite Miocene to
New Zealand Pleistocene
Nelson Greenstones Mesozoic Granite Miocene to
New Zealand greywackes Pleistocene
schists, slates
Morobe Argellites Palaeozoic Granodiorite Miocene
New Guinea schists, quartz Pliocene
por.
China Schists Not reported Granite Not reported
Mongolia gneisses
Lena River Slates Precambrian Granite Pliocene
U.S.S.R/ greywackes Lower Quartz, spar Pleistocene
phyllites, schists Palaeozoic porphyry
Yakutia Granularites, Archaen Granitoid Pre-Quaternary
U.S.S.R. schists pre-Mesozoic