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Correl 2 > GOP > Flashcards

GOP Flashcards

1
Q

3 plates surrounding the philippines

A

Pacific plate
Eurasian plate
Indo-asutralian plates

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2
Q
  • composed entirely of oceanic crust
  • age of 150 MY (Late jurassic)
  • 80mm, 8 cm / year movement
A

Pacific plate

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3
Q

At 43 MY (Eocene) the pacific plate moves at ?

A

50d egrees Counter clockwise rotation from NNW to WNW

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4
Q

At 5 MY (late miocene) the pacific plate moves at?

A

10 degrees counter Clockwise rotation

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5
Q

Pacific sea plate subducts along ______ , ________, and __________

A
  • Eurasian plate along japan trench
  • under philippine sea plate along bonin-marianas trench
  • Indo-Australian plate east of new zealand
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6
Q

Rate of movement of eurasian plate

A

3mm/ year since 50 MY (late miocene)

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7
Q

Plate composed of both oceanic and continental plates

A

Indo-australian plate

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8
Q

Rate of movement of the indo-australian plate

A

107 mm/ year with a northward motion

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9
Q

The continental portion of the indo-australian plate collides with the _______

A

Eurasian (Himalayas)

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10
Q

The oceanic portion of the indo-australian plate subducts under the ________

A

Eurasian along the Java Trench

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11
Q

Occupies almost 50% of the phil sea plate

A

West Philippine Basin

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12
Q

Age of west philippine sea basin based on the paleomagnetic data

A

60 - 35 Ma

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13
Q

Age of the west philippine sea basin based on deep sea drilling

A

53-42 Ma

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14
Q

3 submarine plateaus in the west philippine sea basin

A
  1. Benham Rise
  2. Urdaneta Plateau
  3. Anami and Oki-Daito Ridges
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15
Q
  • an extinct MOR that trends WNW to ESE

- caused the expansion of the west philippine sea basin

A

Central Basin Fault

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16
Q

2 models of the basin’s origin

A
  1. Trapped oceanic basinby Uyeda and Ben-abraham

2. Back arc basin model by Karig, mrozowki, sena, and maruyama

17
Q

Model of the WPB that states that the Oki-daito would correspond to a relict volcanic arc that travelled to the NE during the opening of the basin

A

Back arc basin model

18
Q

Oceanic crust of the WPB that accelerates on a N-S spreading axis

A

Parece Vela-Shikoku Basin
- 1st stage: 30 Ma - Parece Vela
- 2nd stage: 10 Ma - shikoku
Stops at 17 Ma

19
Q
  • Basin the opens around 6 Ma and presently active
  • the opening of the basin is usually associated with an eastward migration of the subduction of the pacific plate under the philippine sea plate
A

Marianas Basin

20
Q

The poorly known portion on the southern extremity of the Phil sea plate

21
Q
  • divides the WPB from the PVSB

- Considered as a relic volcanic arc of middle eocene to oligocene age

A

Palau-Kyushu Ridge (2500km)

22
Q
  • Eastern limit of the shikoku basin

- represent the volcanic arc of the presently active bonin trench colliding with the japanese margin

A

Izu-Bonin Ridge

23
Q

2 branches or parts of the Izu-Bonin Ridge

A

West Marianas Ridge

East Marianas Ridge

24
Q

Ancient volcanic arc active between 20 to 9 Ma

-part of the izu bonin ridge

A

West Marianas Ridge

25
Q

-Volcanic arc of the presently active marianas trench

A

East Marianas Ridge

26
Q

The PSP subducts NW under the japanese archipelago along the _______ and ________

A

Nankai and Ryuku Trench

27
Q

The PSP subducts SW into the philippine archipelago along the ______

A

Philippine Trench System

28
Q

The eastern part of the PSP is defined by the _______, _______ and ________

A

Bonin Trench, Marianas Trench, and Yap trench

29
Q

Rotation pole of the psp is located at the

A

NE of Japan

30
Q

NW and SW displacement of the PSP are ?

A

NW - 3 cm/yr

SW - 9 cm/yr

31
Q

Reltive displacement direction of the PSP whos azimuth is directed at ______

A

N55W near taiwan with a linear velocity around 7cm/yr

32
Q

Marginal basins: eurasian affinity
- basin with a depth of 4km
Opening was precede by rifting that could have taken place between the late cretaceous and late eocene

A

South china sea basin

33
Q

What triggred/caused the opening of the south china sea?

A

India-eurasian collision (extrusion tectonics)

34
Q

Basin Situated immediately to the southeast of palawan, formed 20 Ma

A

Sulu sea basin

35
Q

Ridge seperating the sulu sea basin into NW and SE sub-basin

A

Cagayan de Sulu Ridge

36
Q

Ridge the separates the sulu sea basin and celebes sea basin

A

Sul-zamboanga ridge

37
Q

Basin located asoutheast of sulu and the sulu-zamboanga arc. Aged 55-42 Ma (eocene). The age was suported by rediolarian dating of pelagic sediments blanketing the MORB-like oceanic basement

A

Celebes Sea Basin

38
Q
  • the westward subduction of the PSP under the eastern philippine arc
  • 250 km
  • age of 5 Ma
  • fvolcanic arc from bicol to leyte
  • west dippinh subduction
A

Philippine trench

Correl 2 (19 decks)

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