19_416M_Carbonate Precipitation Modes and Factories_handout

19_416M_Carbonate Precipitation Modes and Factories_handout...

Info icon This preview shows pages 1–14. Sign up to view the full content.

View Full Document Right Arrow Icon
Modes of Carbonate Precipitation Abiotic Precipitates where biotic effects are negligible Biotically Induced Precipitates where the organism sets the process in motion, but where organismal influence cease after the initial step Biotically controlled Precipitates where the organism determines the location, beginning and end of the process. Key in carbonates! 1
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Biotically Controlled Carbonate Producers 2
Image of page 2
Carbonate Factories Tropical Shallow Water ____________ w/low nutrients 30° N to 30°S latitude today Cool-Water _____________ precipitates rule (Heterotrophs dominate) Wide depth window High latitudes Mud-mound In situ precipitation of ________ carbonate Firm & hard upon formation Low light, high nutrients 3
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Factory I: Tropical Warm (>18°C), shallow seawater (< 100m) Clear, well-lit, well-circulated seawater _____________ can mediate/control carbonate precipitation Normal-to-elevated salinities for seawater Low nutrients (oligotrophic) Low net organic productivity 4
Image of page 4
CaCO
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 6
Image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
Image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 10
Image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 12
Image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 14
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Production • Light is basis of photosynthesis • Much carbonate is formed as byproduct of photosynthesis (e.g., calcareous algae) 5 Factory II: Cool Water • Great Australian Bight 6 Factory III: Mud Mounds • 25-30 m high, Algeria 7 • Example: Porcupine Mounds, IODP Exp. 307 8 Where is most marine carbonate produced?? 9 Carbonate Factories • Differ in 1. 2. 3. Precipitation Modes Mineral Composition Depth range of production and growth potential Carbonate Rocks are records of their environments • Carbonate factories Produce – Sediments of _______ (clay to boulder) – Sediments that can be ___________ upon formation – Sediments that can be ________ or relatively ________ – Sediments of both _______ and _______ origin • These sediments and the rocks that they form can be used as indicators of past ____________ and ___________ • This requires describing assemblages of sediments and relating them to their environments of origin...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern