U.S.-Argentina Cooperative Research: The Hydrogeochemistry of Copahue Volcano, Province of Neuquen, Argentina

9813912Varekamp此提案请求资助康涅狄格州卫斯理大学的 Johan Varekamp 博士和 9813912Varekamp 博士之间的合作研究项目。 Daniel H. Delpino，COPADE 内乌肯省科技总监。阿根廷内乌肯和 Adriana Bermudez 博士，CONICET。 。 他们将对位于安第斯山脉东部的科帕韦火山的水文地球化学进行研究。 该火山拥有广泛的酸性热液系统，其中包括火山口湖、从深层汲取液体的酸性泉水，以及位于其东北侧的地热系统。 热液使阿格里奥大河和卡维亚胡冰川湖酸化。该研究的主要目标包括描述火山流体的化学成分、火山口湖和酸化流域中的水/岩石相互作用过程、通过阿格里奥河的元素通量的量化以及对科帕韦周围火山危害的评估。 研究人员还计划创建一个湖泊爆炸的理论模型，以研究喷发触发因素的性质。火山岩浆热液系统的性质以及这些深层流体与大气水的相互作用是矿石沉积研究的重要领域，这些系统的酸性流出物可能对当地流域产生严重影响。对火山口湖和酸泉进行全面的主量元素、微量元素和同位素分析将提供热液系统中岩浆脱气和岩石溶解的速率，以及深层热液流体的同位素特征。这项研究的结果预计将产生非常实用的环境数据以及火山学意义，并将在内乌肯地质博物馆展出。

9813912VarekampThis proposal requests funding for a collaborative research project between Dr. Johan Varekamp, Wesleyan University, Connecticut, and Drs. Daniel H. Delpino, Director of Science and Technology of Neuquen Province, COPADE. Neuquen Argentina, and Dr. Adriana Bermudez, CONICET. . They will conduct a study of the hydrogeochemistry of the Copahue Volcano, located in the eastern Andes. The volcano has an extensive acid hydrothermal system with a crater lake, acid springs that draw fluids from deep sources, and a geothermal system on its NE flank. The hydrothermal fluids acidify a large river, the Rio Agrio, and the glacial lake, Caviahue. The main goals of the research include the description of the chemical composition of the fluids from the volcano, water/rock interaction processes in the crater lake and in the acidified watershed, a quantification of the element fluxes through the Rio Agrio, and an evaluation of volcanic hazards around Copahue. The researchers also plan to create a theoretical model for lake explosions to investigate the nature of eruption triggers. The nature of volcano-magmatic hydrothermal systems and the interactions of these deep fluids with meteoric waters is an important field of study for ore deposition, and the acid effluent of these systems may have a severe impact on local watershed. Comprehensive major and trace element and isotopic analyses of the crater lake and acid springs will provide the rates of magmatic degassing and rock dissolution in the hydrothermal system, as well as the isotopic character of the deep hydrothermal fluids. The results of the study, which is expected to yield very practical data of environmental, as well as volcanological significance, will be displayed at the Neuquen Museum of Geology.