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Textures of Gabbroic Rocks Formed at...

Brown, Tyler C.

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Textures of Gabbroic Rocks Formed at Fast-Spreading Mid-Ocean Ridges.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Textures of Gabbroic Rocks Formed at Fast-Spreading Mid-Ocean Ridges./
作者:	Brown, Tyler C.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	273 p.
附註:	Source: Dissertations Abstracts International, Volume: 82-08, Section: B.
Contained By:	Dissertations Abstracts International82-08B.
標題:	Petrology. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28258190
ISBN:	9798569917525

Textures of Gabbroic Rocks Formed at Fast-Spreading Mid-Ocean Ridges.
Brown, Tyler C.

Textures of Gabbroic Rocks Formed at Fast-Spreading Mid-Ocean Ridges. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 273 p.

Source: Dissertations Abstracts International, Volume: 82-08, Section: B.

Thesis (Ph.D.)--University of Wyoming, 2020.

This item must not be sold to any third party vendors.

Mid-ocean ridges are the birthplace of nearly two-thirds of Earth's surface. Ridges spreading apart at fast (> 8 cm/year) and intermediate (>5 cm/year) rates are characterized by abundant magmatism that generates ~6-7 km thick ocean crust. This crustal rock sequence consists of basalts at the seafloor, above sheeted dikes, sitting atop 4-6 km of plutonic crust that extends to the Moho. The plutonic crust includes variably massive, sub-vertically foliated, to sub-horizontally layered gabbroic rocks. Seismic investigations of present-day magmatically robust mid-ocean ridges indicate a thin and narrow cross-axis melt lens, that overlies a zone of reduced seismic P-wave velocities that extends to the Moho. The region of low seismic velocities is thought to reflect a crystal mush (mixture of crystals and 2-40% melt). This dissertation focuses on the processes operating within that melt-mush framework that generate the full thickness of the ocean crust formed at fast and intermediate spreading ridges.

ISBN: 9798569917525Subjects--Topical Terms:

535210
Petrology.
Subjects--Index Terms:

Seismic investigations

Textures of Gabbroic Rocks Formed at Fast-Spreading Mid-Ocean Ridges.
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245 1 0 $a Textures of Gabbroic Rocks Formed at Fast-Spreading Mid-Ocean Ridges.
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300 $a 273 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-08, Section: B.
500 $a Advisor: Cheadle, Michael J.
502 $a Thesis (Ph.D.)--University of Wyoming, 2020.
506 $a This item must not be sold to any third party vendors.
520 $a Mid-ocean ridges are the birthplace of nearly two-thirds of Earth's surface. Ridges spreading apart at fast (> 8 cm/year) and intermediate (>5 cm/year) rates are characterized by abundant magmatism that generates ~6-7 km thick ocean crust. This crustal rock sequence consists of basalts at the seafloor, above sheeted dikes, sitting atop 4-6 km of plutonic crust that extends to the Moho. The plutonic crust includes variably massive, sub-vertically foliated, to sub-horizontally layered gabbroic rocks. Seismic investigations of present-day magmatically robust mid-ocean ridges indicate a thin and narrow cross-axis melt lens, that overlies a zone of reduced seismic P-wave velocities that extends to the Moho. The region of low seismic velocities is thought to reflect a crystal mush (mixture of crystals and 2-40% melt). This dissertation focuses on the processes operating within that melt-mush framework that generate the full thickness of the ocean crust formed at fast and intermediate spreading ridges.
590 $a School code: 0264.
650 4 $a Petrology. $3 535210
650 4 $a Marine geology. $3 3173821
650 4 $a Plate tectonics. $3 542702
653 $a Seismic investigations
653 $a Seismic velocity
653 $a Crustal rock sequence
653 $a Mid-ocean ridges
653 $a Melt-mush framework
690 $a 0584
690 $a 0556
690 $a 0592
710 2 $a University of Wyoming. $b Geology & Geophysics. $3 1043736
773 0 $t Dissertations Abstracts International $g 82-08B.
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791 $a Ph.D.
792 $a 2020
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28258190