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1、2611997M1oGEOCHIMICAVol.26, No.1Jan., 1997B5o+#y*颜文(SS2ZZ,#28!aaE1vx,Tb611:B5o+#yID1,S&,qbS-=bv/, 1991, 15(1):15i21.2Hedenquist J W, Henley R W.Hydrothermal eruptions in Waiotapu geothermalsystem, New Zealand: Their origin,associated breccias and relation to precious metal mineralization. Econ Geol.
2、 1985, 80: 1640i1648.3White D E. Active geothermal system and hydrothermal ore deposits.Econ Geol, 1981, 75th Anni Vol: 392i423.4o,b28?C#ilb, 1993, 39(1): 73i78.5cbyAo+b, 1990, 8(3):75i83.6Gustafson L B, Williams N. Sediment- hosted stratiform deposits of copper, lead, zinc. Econ Geol, 1981, 75th An
3、niVol: 139i178.7Marchig V, Gundlach H, Moller P et al. Some geochemical indicators for discrimination between diagenetic and hy-drothermal metalliferous sediments.M ar Geol, 1982,50(3): 241i256.8bB5o: .L:SSo, 1993.91ab5o+#: .L:SSo, 1993.10Graf J L Jr. Rare earth elements as hydrothermal tracers duri
4、ng the formation of massive sulfide deposits in vol-canic rocks. Econ Geol, 1977, 72: 527i548.11,obudMTb, 1993, 9(1): 14i21.12Nelson C E. Hydrothermal eruption mechanism and hot spring gold deposits. Econ Geol, 1985, 80: 1639i1663.13Hedenquist J W. Boiling and dilution in the shallow portion of Waio
5、tapu geothermal system, New Zealand.Geochim Cosmochim Acta, 1991, 55: 2753i2765.62o1997MGEOCHEMICAL CHARACTERISTICS AND THEIRHYDROTHERMAL SEDIMENTARY GENESIS OF ANEW TYPE OF COPPER DEPOSITYan Wen(South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510301)Li Chaoyang( Op en
6、Laboratory of Ore Dep osit Geochemistry, Institute of Geochemistry, Chinese A cademy of Sciences, Guiyang550002)AbstractThis paper reports the geological and geochemical characteristics of some typicalvein copper deposits in Lanping- Simao basin,Yunnan province and discusses their hy-drothermal gene
7、sis.Most of these copper deposits are located in proximity to the majoractive faults or the contemporaneous faults. Ore structures are mainly brecciated andmassive.Metal mineral association is characterised by abundant tetrahedrite- tennantiteseries (Cu12Sb4S13- Cu12As4S13),especially the tennantite
8、s.Element association is char-acterised by Cu- As- Sb- Ag- Zn- (Au)- (Hg)- ( Co)- (Ga).REE patterns of veinminerals show an enrichment of middle REE (Sm- Ho) and a weak or no europiumanomaly. These features,combined with the analysis of mineralization environment,leadus to conclude that thevein copp
9、er deposits in this areawas formed during thecontinen-tal hydrothermal sedimentation and hydrothermal boiling in the shallow portion wastheir main metallogenetic mechanism.They thus represent a new type of copper depositin genetic sense.Key words:vein copper deposit, geochemical characteristics, continental hy-drothermal sedimentation,Yunnan631:B5o+#y
