Wiegand, Bettina A.

[["dc.bibliographiccitation.firstpage","29"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Grundwasser"],["dc.bibliographiccitation.lastpage","41"],["dc.bibliographiccitation.volume","21"],["dc.contributor.author","Brehme, Maren"],["dc.contributor.author","Deon, Fiorenza"],["dc.contributor.author","Haase, Christoph"],["dc.contributor.author","Wiegand, Bettina A."],["dc.contributor.author","Kamah, Yustin"],["dc.contributor.author","Sauter, Martin"],["dc.contributor.author","Regenspurg, Simona"],["dc.date.accessioned","2018-11-07T10:17:32Z"],["dc.date.available","2018-11-07T10:17:32Z"],["dc.date.issued","2016"],["dc.description.abstract","Rock and fluid geochemical data from Lahendong, Indonesia, were analyzed to evaluate the influence of fault zones on reservoir properties. It was found that these properties depend on fault-permeability controlled fluid flow. Results from measurements of spring and well water as well as rocks and their hydraulic properties were combined with hydrochemical numerical modeling. The models show that the geothermal field consists of two geochemically distinct reservoir sections. One section is characterized by acidic water, considerable gas discharge and high geothermal-power productivity-all related to increased fault zone permeability. The other section is characterized by neutral water and lower productivity. Increased fluid flow in the highly fractured and permeable areas enhances chemical reaction rates. This results in strong alteration of their surrounding rocks. Numerical models of reactions between water and rock at Lahendong indicate the main alteration products are clay minerals. A geochemical conceptual model illustrates the relation between geochemistry and permeability and their distribution within the area. Our conceptual model illustrates the relation between geochemistry and fault-zone permeability within the Lahendong area. Further mapping of fault-related permeability would support sustainable energy exploitation by avoiding low-productive wells or the production of highly corroding waters, both there and elsewhere in the world."],["dc.description.sponsorship","International Centre for Geothermal Research"],["dc.identifier.doi","10.1007/s00767-015-0313-9"],["dc.identifier.isi","000372554800005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41245"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","Heidelberg"],["dc.relation.issn","1432-1165"],["dc.relation.issn","1430-483X"],["dc.title","Fault controlled geochemical properties in Lahendong geothermal reservoir Indonesia"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","43"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Grundwasser"],["dc.bibliographiccitation.lastpage","45"],["dc.bibliographiccitation.volume","21"],["dc.contributor.author","Brehme, Maren"],["dc.contributor.author","Deon, Fiorenza"],["dc.contributor.author","Haase, Christoph"],["dc.contributor.author","Wiegand, Bettina A."],["dc.contributor.author","Kamah, Yustin"],["dc.contributor.author","Sauter, Martin"],["dc.contributor.author","Regenspurg, Simona"],["dc.date.accessioned","2018-11-07T10:17:32Z"],["dc.date.available","2018-11-07T10:17:32Z"],["dc.date.issued","2016"],["dc.identifier.doi","10.1007/s00767-016-0321-4"],["dc.identifier.isi","000372554800006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41247"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.publisher.place","Heidelberg"],["dc.relation.issn","1432-1165"],["dc.relation.issn","1430-483X"],["dc.title","Fault controlled geochemical properties in Lahendong geothermal reservoir Indonesia (vol 21, pg 29, 2016)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Geothermal Energy"],["dc.bibliographiccitation.volume","3"],["dc.contributor.author","Deon, Fiorenza"],["dc.contributor.author","Förster, Hans-Jürgen"],["dc.contributor.author","Brehme, Maren"],["dc.contributor.author","Wiegand, Bettina"],["dc.contributor.author","Scheytt, Traugott"],["dc.contributor.author","Moeck, Inga"],["dc.contributor.author","Jaya, Makky S."],["dc.contributor.author","Putriatni, Dewi J."],["dc.date.accessioned","2019-07-09T11:41:55Z"],["dc.date.available","2019-07-09T11:41:55Z"],["dc.date.issued","2015"],["dc.description.abstract","Magmatic settings involving active volcanism are potential locations for economic geothermal systems due to the occurrence of high temperature and steam pressures. Indonesia, located along active plate margins, hosts more than 100 volcanoes and, therefore, belongs to the regions with the greatest geothermal potential worldwide. However, tropical conditions and steep terrain reduce the spectrum of applicable exploration methods, in particular in remote areas. In a case study from the Lamongan volcanic field in East Java, we combine field-based data on the regional structural geology, elemental and isotopic composition of thermal waters, and the mineralogical and geochemical signatures of volcanic rocks in exploring hidden geothermal systems. Results suggest infiltration of groundwater at the volcanoes and faults. After infiltration, water is heated and reacts with rocks before rising to the surface. The existence of a potential heat source is petrologically and geophysically constrained to be an active shallow mafic-magma chamber, but its occurrence is not properly reflected in the composition of the collected warmed spring waters that are predominantly meteoric in origin. In conclusion, spring temperature and hydrochemistry alone may not always correctly reflect the deep geothermal potential of an area."],["dc.identifier.doi","10.1186/s40517-015-0040-6"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12588"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/58549"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","2195-9706"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Geochemical/hydrochemical evaluation of the geothermal potential of the Lamongan volcanic field (Eastern Java, Indonesia)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]