東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Sulfur isotopic characterization of ...

Arango, Irene.

FindBook

Google Book

Amazon

博客來

Sulfur isotopic characterization of bedrock, alkaline lakes, and evaporitic sediment from a closed-drainage basin on the Oregon basalt plateau.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Sulfur isotopic characterization of bedrock, alkaline lakes, and evaporitic sediment from a closed-drainage basin on the Oregon basalt plateau./
作者:	Arango, Irene.
面頁冊數:	227 p.
附註:	Adviser: Lisa M. Pratt.
Contained By:	Dissertation Abstracts International67-08B.
標題:	Biogeochemistry. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3232579
ISBN:	9780542850004

Sulfur isotopic characterization of bedrock, alkaline lakes, and evaporitic sediment from a closed-drainage basin on the Oregon basalt plateau.
Arango, Irene.

Sulfur isotopic characterization of bedrock, alkaline lakes, and evaporitic sediment from a closed-drainage basin on the Oregon basalt plateau. - 227 p.

Adviser: Lisa M. Pratt.

Thesis (Ph.D.)--Indiana University, 2006.

Warner Valley is a closed-drainage basin containing numerous alkaline lakes and saline playas in south-central Oregon. Samples of Tertiary basaltic bedrock were collected from outcrops of layered flows surrounding the valley and analyzed for their oxygen (delta18O), hydrogen (delta 2H), and sulfur (delta34S) isotopic compositions. Whole rock delta18O values range from 5.2 to 15.0&permil;. High delta18O values suggest that rocks underwent low-temperature hydrothermal alteration. Calculated fluid delta18O versus delta 2H values suggest a meteoric origin. Sulfur phases extracted from rock samples include acid-volatile (SAV), Cr-reducible (S Cr), and acid-soluble sulfur (SAS). SAV corresponds to mantle-derived sulfides (delta34SAV = 1.5 to 5.9&permil;). SCr corresponds to secondary sulfides (delta 34SCr = -0.8 to 10.8&permil;). SAS corresponds to gypsum (delta34SAS = 3.1 to 9.5&permil;).

ISBN: 9780542850004Subjects--Topical Terms:

545717
Biogeochemistry.

Sulfur isotopic characterization of bedrock, alkaline lakes, and evaporitic sediment from a closed-drainage basin on the Oregon basalt plateau.
LDR:03502nam 2200313 a 45 001 965462
005 20110906
008 110906s2006 eng d
020 $a 9780542850004
035 $a (UMI)AAI3232579
035 $a AAI3232579
040 $a UMI $c UMI
100 1 $a Arango, Irene. $3 1288238
245 1 0 $a Sulfur isotopic characterization of bedrock, alkaline lakes, and evaporitic sediment from a closed-drainage basin on the Oregon basalt plateau.
300 $a 227 p.
500 $a Adviser: Lisa M. Pratt.
500 $a Source: Dissertation Abstracts International, Volume: 67-08, Section: B, page: 4307.
502 $a Thesis (Ph.D.)--Indiana University, 2006.
520 $a Warner Valley is a closed-drainage basin containing numerous alkaline lakes and saline playas in south-central Oregon. Samples of Tertiary basaltic bedrock were collected from outcrops of layered flows surrounding the valley and analyzed for their oxygen (delta18O), hydrogen (delta 2H), and sulfur (delta34S) isotopic compositions. Whole rock delta18O values range from 5.2 to 15.0&permil;. High delta18O values suggest that rocks underwent low-temperature hydrothermal alteration. Calculated fluid delta18O versus delta 2H values suggest a meteoric origin. Sulfur phases extracted from rock samples include acid-volatile (SAV), Cr-reducible (S Cr), and acid-soluble sulfur (SAS). SAV corresponds to mantle-derived sulfides (delta34SAV = 1.5 to 5.9&permil;). SCr corresponds to secondary sulfides (delta 34SCr = -0.8 to 10.8&permil;). SAS corresponds to gypsum (delta34SAS = 3.1 to 9.5&permil;).
520 $a Water samples were collected from springs and lakes in Warner Valley. Values of delta34S for dissolved sulfate (delta 34SDS) in water samples range from 7.5 to 10.8&permil; in springs and from 7.0 to 14.8&permil; in lakes. Values of delta 34SDS in spring waters largely overlap with values of delta 34SAS in basaltic bedrock, suggesting that gypsum in basalts is the main sulfur source for Warner Valley springs. Higher delta34S DS values in lake waters than in spring waters suggest preferential uptake of 32S from the dissolved sulfate pool during bacterial sulfate reduction (BSR) and sequestration as sedimentary sulfides.
520 $a Three sedimentary cores of evaporitic muddy sediment were collected along a transect across a small playa lake. Sulfur phases extracted from the sediments include elemental sulfur (SEI), SCr, and SAS. Isotopic fractionations between SAS and SCr (Delta 34SAS-Cr) range from 5.2 to 21.5&permil; and are consistent with BSR. Values of delta34SCr increase downward while values of delta34SAS decrease downward through the sedimentary column. Wet-and-dry seasonal cycles in Warner Valley evaporitic lakes produce cracking of the surface muds, allowing air to penetrate into previously anoxic sediments. Isotopic mass balance indicates that reoxidation of isotopically light sulfide from BSR results in a relative increase in delta 34SCr values. Mixing of primary sulfate with reoxidized sulfide accounts for the relative depletion of delta34S AS values with depth. Results from this study are a contribution to understanding past and present sulfur cycles in non-marine, evaporitic settings.
590 $a School code: 0093.
650 4 $a Biogeochemistry. $3 545717
650 4 $a Geochemistry. $3 539092
650 4 $a Geology. $3 516570
690 $a 0372
690 $a 0425
690 $a 0996
710 2 0 $a Indiana University. $3 960096
773 0 $t Dissertation Abstracts International $g 67-08B.
790 $a 0093
790 1 0 $a Pratt, Lisa M., $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3232579