THE TEMPORAL AND SPATIAL DISTRIBUTION OF PORPHYRY CU (AU-MO) DEPOSITS IN THE ANDES BELT
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摘要:
南美安第斯带斑岩型铜（金-钼）矿床受板块持续俯冲作用影响，呈线性多条带状分布，以中安第斯段的矿床数量多、分布集中、矿床规模巨大为特征；成矿时代有晚古生代冈瓦纳造山旋回两期和中—新生代安第斯造山旋回4期，以始新世晚期—渐新世和中新世中期—上新世最为重要。
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关键词:
- 安第斯带 /
- 斑岩型铜(金-钼)矿床 /
- 时空分布 /
- 南美洲
Abstract:This article relies on the "Global Mineral Resources Information System" and related projects of the China Geological Survey. The spatial and temporal distribution characteristics of the porphyry Cu(Au-Mo) deposit in the Andean orogenic belt of South America is summarized: Influenced by the continuous subduction of the plate, the porphyry Cu(Au-Mo) deposit in the Andean belt is linear and multi-banded. It is characterized by a large number of deposits, concentrated distribution and large scale of deposits in the Central Andes section. At the age of mineralization, there were two periods of the Late Paleozoic Gondwana orogenic cycle and and four periods of the Mesozoic-Cenozoic Andean orogenic revolving cycle. The most important is the late Eocene-Oligocene and Miocene mid-Pliocene. It provides a reference for understanding the ore-forming geological characteristics and metallogenic regularity of porphyry deposits in the Andean belt.
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表 1 安第斯带各斑岩铜矿成矿期已发现的铜资源量
Table 1. Copper resources discovered during the ore-forming period of various porphyry copper deposits in the Andes belt
成矿时代 铜资源量(万吨) 占已发现资源量的比例 新生代 中新世—上新世 19490 32.9% 渐新世—中新世 5110 8.6% 始新世—渐新世 26900 45.4% 古新世—始新世 6500 11.0% 中生代 早白垩世 155 0.3% 中晚侏罗世 900 1.5% 古生代 二叠纪 200 0.3% 合计 59255 100% 资料来源：USGS Open-File Report 2008-1253[22] 
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